[Wicket-user] Best practices for project structure
Last year I created two Wicket applications for use by customers. The two applications had a virtually identical navigation struction and similar kinds of displays, so as you might expect, I built a great many specialized Wicket panels and parent page classes to be shared by both applications. I used an IDE mandated by my employer -- Jbuilder 2006 -- which provides various builds (web build, ejb build, Javadoc build, etc.) within the context of a single project. I created one project for application A and another for application B. To avoid duplicating the objects I built that were used in both applications, I placed them in a root project C upon which both applications A and B were dependent. All three projects contained a web build: * Root project C contained a Wicket web application for trying out my reusable components. * Root project A contained a web build consisting of two Wicket applications: (1) a Wicket application for playing with and testing the reusable components built for that application only, and (2) a Wicket application for the users. I also added (3) a non-Wicket stateless servlet. * Root project B likewise contained a web build consisting of two Wicket applications: (1) a Wicket application for testing project B specific components, and (2) a Wicket application for the users. I now have the opportunity to upgrade to JBuilder 2007, which is based on Eclipse and is very different from JBuilder 2006. (This is exciting because I may finally get to use the Wicket plug-in.) My main concern is that in Eclipse every build type must be a separate project. I do not like the results I get using the automatic JBuilder 2007 import wizards; I get the impression that it's not designed for the kind of project structure I was using. (In particular, most people would probably consider it weird to have a Web project be dependent upon another Web project.) What sort of Eclipse project structure would be appropriate for what I've done? Should I create three Eclipse Web projects, with two of them each depending upon the third? Or would Eclipse be confused by the attempt to make one web project depend upon another? If so, should the root project C be divided into: 1. a web project with the deployment information for testing, and 2. a simple Java project to contain the classes and HTML files against which the deliverable applications will be compiled, and to be incorporated into their deployment deliverables? Is there any reason to divide projects A or B into muliple Eclipse projects? How, in Eclipse, do I specify whether a projects required dependency should have its classes deployed in the deliverable (versus, say, the kind of dependency that you can expect to already be deployed to the web server's own lib directory)? - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Best practices for project structure
OK, I've downloaded 'Better Builds with Maven' and it shows me how I can build a J2EE project with ejb and web sub projects, with each of those projects relying on libraries. How would you suggest I refactor my two webProjects depending on a common rootWebProject to make use of the maven-ejb-plugin? I would want the ability to build at least three separate webmodules -- one for testing the common web components, and one webmodule for each application using those common components. Would I have to build a library jar from the Java/.html code of the root web application, and have the three web applications depend on that? Are there any other reasonable options I should consider? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Martijn Dashorst Sent: Wednesday, March 07, 2007 3:11 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Best practices for project structure I'd suggest downloading 'better builds with maven', and base your project on that... There is no replacement for a good build tool and setup without IDE's. mvn eclipse:eclipse -DdownloadSources=true is your friend :) Martijn On 3/7/07, Frank Silbermann [EMAIL PROTECTED] wrote: Last year I created two Wicket applications for use by customers. The two applications had a virtually identical navigation struction and similar kinds of displays, so as you might expect, I built a great many specialized Wicket panels and parent page classes to be shared by both applications. I used an IDE mandated by my employer -- Jbuilder 2006 -- which provides various builds (web build, ejb build, Javadoc build, etc.) within the context of a single project. I created one project for application A and another for application B. To avoid duplicating the objects I built that were used in both applications, I placed them in a root project C upon which both applications A and B were dependent. All three projects contained a web build: Root project C contained a Wicket web application for trying out my reusable components. Root project A contained a web build consisting of two Wicket applications: (1) a Wicket application for playing with and testing the reusable components built for that application only, and (2) a Wicket application for the users. I also added (3) a non-Wicket stateless servlet. Root project B likewise contained a web build consisting of two Wicket applications: (1) a Wicket application for testing project B specific components, and (2) a Wicket application for the users. I now have the opportunity to upgrade to JBuilder 2007, which is based on Eclipse and is very different from JBuilder 2006. (This is exciting because I may finally get to use the Wicket plug-in.) My main concern is that in Eclipse every build type must be a separate project. I do not like the results I get using the automatic JBuilder 2007 import wizards; I get the impression that it's not designed for the kind of project structure I was using. (In particular, most people would probably consider it weird to have a Web project be dependent upon another Web project.) What sort of Eclipse project structure would be appropriate for what I've done? Should I create three Eclipse Web projects, with two of them each depending upon the third? Or would Eclipse be confused by the attempt to make one web project depend upon another? If so, should the root project C be divided into: a web project with the deployment information for testing, and a simple Java project to contain the classes and HTML files against which the deliverable applications will be compiled, and to be incorporated into their deployment deliverables? Is there any reason to divide projects A or B into muliple Eclipse projects? How, in Eclipse, do I specify whether a projects required dependency should have its classes deployed in the deliverable (versus, say, the kind of dependency that you can expect to already be deployed to the web server's own lib directory)? -- --- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEV DEV ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user -- Learn Wicket at ApacheCon Europe: http://apachecon.com Join the wicket community at irc.freenode.net: ##wicket Wicket 1.2.5 will keep your server alive. Download Wicket now! http://wicketframework.org - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance
Re: [Wicket-user] Dreamweaver
Anybody working on generating most of the wicket code from the html as far as you know? The wicket-oriented Java code contains the presentation logic. A big advantage of Wicket is keeping presentation logic _out_ of the HTML. (HTML is not object oriented, so presentation logic embedded in the HTML -- whether in the form of tag-nestings or scripts -- is difficult to reuse.) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of nilo.de.roock Sent: Thursday, January 25, 2007 6:30 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Dreamweaver Hi Otan, ... The good thing about wicket is that it's so easy to insert wicket components into the markup by putting only the wicket:id and some few wicket tags into the wicket markups that make it so Dreamweaver-friendly and page authors-friendly. ... Exactly, it's -that- simple! And I have a use case so developing an extension won't be difficult. Anybody working on generating most of the wicket code from the html as far as you know? Kind regards, nilo Otan wrote: Just like what I said, I can't find any usecase to make a Dreamweaver extensions for Wicket. Who from your team do you expect will use Dreamweaver? The page authors, right? Page authors who are working with the markup concerns only the wicket:id attribute and some wicket tags. Databinder or something? Wicket is not JSF or JSP. The good thing about wicket is that it's so easy to insert wicket components into the markup by putting only the wicket:id and some few wicket tags into the wicket markups that make it so Dreamweaver-friendly and page authors-friendly. Just my 2 centavos. On 24/01/07, nilo.de.roock [EMAIL PROTECTED] wrote: I was just checking if someone has been doing some DW work. It seems no one has. Just thinking out loud whether I should develop something myself ... ( ... ) I agree that a Dreamweaver extension for Wicket may seem useless or overkill if you are a Java developer. Developers prefer vi over DW, I suppose. But then ( Java ) developers usually don't excel in designing websites ( have a look at http://www.csszengarden.com/ to see what designers can do without even touching html, let alone if you give them the freedom to change html as well ). The explanation is probably that designers are better in communicating with end-users than developers are. I strongly propose seperating design ( including coding html and css ) and technical work from architectural design to coding Java. But I am getting off-topic, to the point: a Dreanweaver extension for Wicket. I am thinking of... ( in order of increasing complexity ) #1 The tool should communicate clearly which components the Wicket framework has to offer, what they do and how they should be used. #2 The tool should take care of coding wicket:id attributes everywhere, either real-time or as a sort of pre-compile before handing over to the Java team. #3 The tool should validate code and naming style. #4 There should be an option to temporarily replace data components with dummy data. #5 A utility to wicket-ize existing sites. It should be possible to automatically generate the .html part of an existing ( data driven ) website. I am always open to other ideas... I am currently studying Wicket / Databinder as a follow-up of a selection project. The product of my study will be a small site including a set of ( customized ) how to's for developing wicket pages. I'll try to develop a Dreamweaver extension as well covering #1, #2 and if time permits #3 and / or #4. I have to dive into DW but if I remember well there is similar stuff for PHP templating so it shouldn't be too hard. I'll let you know when I have to something which I can show. - nilo de roock Otan wrote: Yeah, Wicket made it possible for us to use dreamweaver again for componentized webpages. Based from my experience, I can't find any usecase to make a Dreamweaver extensions for Wicket. On 24/01/07, nilo.de.roock [EMAIL PROTECTED] wrote: Wicket makes coding fun again! I don't have a Mac but I do have Dreamweaver 8. It has been a while since I have been using Dreamweaver so I almost forgot what a superb program it still is. - ( I hope it is not against Wicket ethics to discuss commercial tool$. ) I would like to ask if anyone else is on this list is using Dreamweaver to develop and communicate gui designs to users? If so, has anyone customized and / or extended Dreamweaver to develop and validate Wicket html? -- View this message in context: http://www.nabble.com/-Wicket-user--Dreamweaver-tf3070690.html#a85351 17 Sent from the Wicket - User mailing list archive at Nabble.com. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and
Re: [Wicket-user] VOTE: IModel and 'model object' name change
I don't care much for getValue() because to me the word value suggests
atomic value (or even atomic constant) -- which is not the general
case.
At first I thought of recommending getBusinessObject() to distinguish
the result from the framework-oriented model classes, but that could be
confusing if it were common practices to embed wicket models inside of
wicket models (the Decorator pattern). If that's they case, I would
deprecate getModelObject() and replace it with getUnwrappedModel().
(Obviously, wicket documentation must somewhere explain the necessity of
_wrapping_ business objects in Wicket model classes to be accessed by
wicket components. Once that process is understood, multiple levels of
wrapping should not be too difficult to understand.)
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Locke
Sent: Tuesday, January 23, 2007 11:35 AM
To: wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user] VOTE: IModel and 'model object' name change
yeah. i agree. if we did anything it would be better to change IModel
as i said, but then just deprecate getModelObject() and add a preferred
version as
getModelValue() as johan suggested. this would only break code that
directly uses IModel (a more limited number of users).
Eelco Hillenius wrote:
I voted -1, but here is my opinion about the change proper.
public interface IModelV extends IDetachable
{
V getValue();
void setValue(V value);
}
This would be for the better imo, though I don't hate the original
getObject *that* much. It's just what you are used to and I think
documentation on how models should be used is a lot more important.
we would also change getModelObject() to getValue() as well as any
other
related methods like getModelObjectAsString() to getValueAsString()
(or
valueAsString() if preferred). there might be naming conflicts
somewhere
or
other problems, but i don't know of any offhand.
Tbh, I actually don't think Component#getValue is for the better. I
think Component#getModelObject is way clearer than Component#getValue.
In the end I think both value and object are ambiguous, and this
should be fixed by documentation and examples.
Btw, If there is *anything* I never liked about the whole model
business, it is the fact that Component has methods to get the model
value in the first place (getModelObject etc).
The indirection that IModel provides is something to get used to. It
is one of the places where we traded clarity and simplicity for
flexibility. I think it'll be hard to grasp for newbies no matter the
naming, so the better our documentation and examples are, the quicker
they will be able to wrap their head around it.
Eelco
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Re: [Wicket-user] VOTE: IModel and 'model object' name change
Yes, perhaps a better way to avoid overloading the word Model or
ModelObject is to use those words to refer to that which is wrapped
(usually a non-wicket oriented business object), and use something else
for the class which does the wrapping and provides access to the wicket
page component.
However, I'm not that keen on the name IModelLocator, as the current
IModel does many things other than merely locating the model. It
provides string-based access methods to the model's parts; it handles
persistance or detachability, etc.
So I'd prefer to make get/setModel methods of an interface named
IModelManager or IModelWrapper.
The verbs Manage and Wrap are still somewhat vague, but there's only
so much that can be done to tersely document a class that does well lots
more than just one thing.
At least IModelManager or IModelWrapper are not ambiguous (as is
ModelObject), and avoids overloading the word Model.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Locke
Sent: Tuesday, January 23, 2007 11:55 AM
To: wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user] VOTE: IModel and 'model object' name change
what do you think of gustav and eelco's IModelLocator / get/setModel
idea?
Frank Silbermann wrote:
I don't care much for getValue() because to me the word value
suggests atomic value (or even atomic constant) -- which is not
the general case.
At first I thought of recommending getBusinessObject() to distinguish
the result from the framework-oriented model classes, but that could
be confusing if it were common practices to embed wicket models inside
of wicket models (the Decorator pattern). If that's they case, I
would deprecate getModelObject() and replace it with
getUnwrappedModel().
(Obviously, wicket documentation must somewhere explain the necessity
of _wrapping_ business objects in Wicket model classes to be accessed
by wicket components. Once that process is understood, multiple
levels of wrapping should not be too difficult to understand.)
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Jonathan Locke
Sent: Tuesday, January 23, 2007 11:35 AM
To: wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user] VOTE: IModel and 'model object' name change
yeah. i agree. if we did anything it would be better to change
IModel as i said, but then just deprecate getModelObject() and add a
preferred version as
getModelValue() as johan suggested. this would only break code that
directly uses IModel (a more limited number of users).
Eelco Hillenius wrote:
I voted -1, but here is my opinion about the change proper.
public interface IModelV extends IDetachable {
V getValue();
void setValue(V value);
}
This would be for the better imo, though I don't hate the original
getObject *that* much. It's just what you are used to and I think
documentation on how models should be used is a lot more important.
we would also change getModelObject() to getValue() as well as any
other
related methods like getModelObjectAsString() to getValueAsString()
(or
valueAsString() if preferred). there might be naming conflicts
somewhere
or
other problems, but i don't know of any offhand.
Tbh, I actually don't think Component#getValue is for the better. I
think Component#getModelObject is way clearer than
Component#getValue.
In the end I think both value and object are ambiguous, and this
should be fixed by documentation and examples.
Btw, If there is *anything* I never liked about the whole model
business, it is the fact that Component has methods to get the model
value in the first place (getModelObject etc).
The indirection that IModel provides is something to get used to. It
is one of the places where we traded clarity and simplicity for
flexibility. I think it'll be hard to grasp for newbies no matter the
naming, so the better our documentation and examples are, the quicker
they will be able to wrap their head around it.
Eelco
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ge
-tf3016921.html#a8526349
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Re: [Wicket-user] Letting users download flat file
ResourceStreamRequestTarget implements IRequestTarget -- are you
suggesting that instead of instantiating an anonymous class that
implements IRequestTarget that I construct an instance of
ResourceStreamRequestTarget?
If so, its constructor requires an implementation of IResourceStream and
a string that contains the responseType. I suppose I could use
text/plain as the responseType, but where do I get the implementation
of IResourceStream? (That interface has a whole bunch of methods to
implement.)
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Johan
Compagner
Sent: Thursday, January 04, 2007 3:59 AM
To: wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user] Letting users download flat file
you can use the ResourceStreamRequestTarget for that now and use
setFileName() for setting the filename.
johan
On 1/4/07, Frank Silbermann [EMAIL PROTECTED] wrote:
I am trying to make a button responde by downloading text to the
user which is saved as a .txt file. Igor suggested I look at
DownloadLink, which downloads a file when clicked.
The code of DownloadLink does not seem to set the content type;
does the system make an assumption based on the file's suffix?
Trying to adapt the code in DownloadLink, I came up with the
following event for my Button subclass:
public void onClick() {
getRequestCycle().setRequestTarget(
new IRequestTarget() {
public void detach(RequestCycle requestCycle) {}
public Object getLock(RequestCycle requestCycle) {
return null; }
public void respond(RequestCycle requestCycle) {
WebResponse r =
(WebResponse)requestCycle.getResponse();
r.setAttachmentHeader(myFilename.txt);
r.setContentType( text/plain; name=myFileName.txt );
PrintStream printStream = new
PrintStream(r.getOutputStream());
printStream.println(Line 1);
printStream.println(Line 2);}
}
);
}
I expect that when I run it and click the button, the browser
should pop-up a box asking me if I wish to save file myFileName.txt
-- a file that should contain two lines of text. But when I run
it and click my button, it goes back to the server, but then nothing
happens --the browser does not prompt me to save anything.
Do you see anything wrong with what I've done?
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Igor
Vaynberg
Sent: Wednesday, January 03, 2007 11:35 AM
To: wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user] Letting users download flat file
the proper approach is to push a new request target into the
request cycle, see DownloadLink
-igor
On 1/3/07, Frank Silbermann [EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] wrote:
In my project, I have a button that lets the user
download the contents of a datatable in a form that MSExcel can
interpret:
Button button = new Button(excelExport) {
protected void onSubmit() {
getRequestCycle().setRequestTarget(new
ComponentRequestTarget(dataTable));
WebResponse wr=(WebResponse)getResponse();
wr.setContentType( excel/ms-excel;
name=myFilename.xls );
wr.setHeader(content-disposition,
attachment;filename=myFilename.xls);
}
};
Suppose I want the button to download a text file
containing some arbitrary text (not necessarily the contents of a
DataTable). Would I do something like this?
Button button = new Button(textfileExport) {
protected void onSubmit() {
StringResponse response = new StringResponse();
response.write(
Whatever I want contained in the output
text file...
);
getRequestCycle().setResponse(response);
WebResponse wr=(WebResponse)getResponse();
wr.setContentType( text/plain;
name=myFilename.txt );
wr.setHeader(content-disposition,
attachment;filename=myFilename.txt);
}
};
If not, what is the proper approach?
-
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[Wicket-user] Letting users download flat file
In my project, I have a button that lets the user download the contents
of a datatable in a form that MSExcel can interpret:
Button button = new Button(excelExport) {
protected void onSubmit() {
getRequestCycle().setRequestTarget(new
ComponentRequestTarget(dataTable));
WebResponse wr=(WebResponse)getResponse();
wr.setContentType( excel/ms-excel; name=myFilename.xls );
wr.setHeader(content-disposition,
attachment;filename=myFilename.xls);
}
};
Suppose I want the button to download a text file containing some
arbitrary text (not necessarily the contents of a DataTable). Would I
do something like this?
Button button = new Button(textfileExport) {
protected void onSubmit() {
StringResponse response = new StringResponse();
response.write(
Whatever I want contained in the output text file...
);
getRequestCycle().setResponse(response);
WebResponse wr=(WebResponse)getResponse();
wr.setContentType( text/plain; name=myFilename.txt );
wr.setHeader(content-disposition,
attachment;filename=myFilename.txt);
}
};
If not, what is the proper approach?
-
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
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Wicket-user mailing list
Wicket-user@lists.sourceforge.net
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Re: [Wicket-user] Letting users download flat file
I am trying to make a button responde by downloading text to the user
which is saved as a .txt file. Igor suggested I look at DownloadLink,
which downloads a file when clicked.
The code of DownloadLink does not seem to set the content type; does the
system make an assumption based on the file's suffix?
Trying to adapt the code in DownloadLink, I came up with the following
event for my Button subclass:
public void onClick() {
getRequestCycle().setRequestTarget(
new IRequestTarget() {
public void detach(RequestCycle requestCycle) {}
public Object getLock(RequestCycle requestCycle) { return null;
}
public void respond(RequestCycle requestCycle) {
WebResponse r = (WebResponse)requestCycle.getResponse();
r.setAttachmentHeader(myFilename.txt);
r.setContentType( text/plain; name=myFileName.txt );
PrintStream printStream = new
PrintStream(r.getOutputStream());
printStream.println(Line 1);
printStream.println(Line 2);}
}
);
}
I expect that when I run it and click the button, the browser should
pop-up a box asking me if I wish to save file myFileName.txt
-- a file that should contain two lines of text. But when I run it and
click my button, it goes back to the server, but then nothing happens
--the browser does not prompt me to save anything.
Do you see anything wrong with what I've done?
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Igor
Vaynberg
Sent: Wednesday, January 03, 2007 11:35 AM
To: wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user] Letting users download flat file
the proper approach is to push a new request target into the request
cycle, see DownloadLink
-igor
On 1/3/07, Frank Silbermann [EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] wrote:
In my project, I have a button that lets the user download the
contents of a datatable in a form that MSExcel can interpret:
Button button = new Button(excelExport) {
protected void onSubmit() {
getRequestCycle().setRequestTarget(new
ComponentRequestTarget(dataTable));
WebResponse wr=(WebResponse)getResponse();
wr.setContentType( excel/ms-excel; name=myFilename.xls
);
wr.setHeader(content-disposition,
attachment;filename=myFilename.xls);
}
};
Suppose I want the button to download a text file containing
some arbitrary text (not necessarily the contents of a DataTable).
Would I do something like this?
Button button = new Button(textfileExport) {
protected void onSubmit() {
StringResponse response = new StringResponse();
response.write(
Whatever I want contained in the output text
file...
);
getRequestCycle().setResponse(response);
WebResponse wr=(WebResponse)getResponse();
wr.setContentType( text/plain; name=myFilename.txt );
wr.setHeader(content-disposition,
attachment;filename=myFilename.txt);
}
};
If not, what is the proper approach?
-
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Join SourceForge.net's Techsay panel and you'll get the chance
to share your
opinions on IT business topics through brief surveys - and
earn cash
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Re: [Wicket-user] Why I recommended Wicket...
Indeed. One might say that Wicket is better than most other frameworks for the same reason that C++ is better than C, that Java is better than Pascal, or that Smalltalk is better than Basic. Wicket allows you to use inheritance to help re-use webpages. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ryan Sonnek Sent: Thursday, December 14, 2006 5:02 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Why I recommended Wicket... Other points of consideration is long term maintenance. A component oriented framework like Wicket encapsulates component functionality into a black box that can be used in many different contexts and still work as designed. The same effect is very difficult to achieve with custom tags (especially when they have external dependencies like javascript, etc). Well said. I think this is one of the best accomplishments of wicket. IMO, re-usable JSP tags are nearly impossible, while reusable wicket components are extremely quick and easy to use. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] SortableDataProvider, size() iterator(int first, int count), Correct execution order?
About DataTable and SortableDataProvider, I believe the designer's assumptions are that in typical use: (1) the DataProvider will not cache any data, (2) each call to iterate() will do a select from the database, (3) each call to size() will do a select from the database, and (4) the number of elements in the database will not change between calls (or if the data does change, we don't care that the screen might show inconsistent results as the user pages back and forth). What if we want the pages to show a consistent view, even though the data might change as the user is paging through it? If the data volume is not too huge, I suppose one could page through a snapshot of the data. To me, that suggests putting all the data in the webpage and using JavaScript to page through it without resubmitting. However, Wicket-Extensions provides no widget with this sort of client-side functionality. Even if we had such a widget, its use would be impractical if the dataset were too huge for a single page download. What one can do with the current DataTable -- at least if the number of concurrent users is small and the size of the result set is reasonable -- is to have the SortableDataProvide retrieve all the data at once and cache it in session storage between pages. Since we don't know whether size() or iterate() will be called first, each will have to check whether the data has already been obtained, and if not then to obtain the data for both methods to use. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Manuel Barzi Sent: Thursday, November 23, 2006 6:25 AM To: wicket-user@lists.sourceforge.net Subject: [Wicket-user] SortableDataProvider, size() iterator(int first,int count), Correct execution order? Hi, there, I have the following composition: WebPage ... ... DataView CustomProvider extends SortableDataProvider ... PagingNavigator DataView The ERROR? I found is this: When clicking on any of the navigation buttons (PagingNavigator), my CustomProvider implementation is managed by Wicket FW calling its implemented (abstract in SortableDataProvider) in the following order: 1 size() 2 iterator(int first, int count) That causes wrong results, because it calls first the size() to check the results obtained when I havent called the iterator(...) yet, and inside my implementation of iterator(int first, int count) I obviously do the call to the API that accesses to my persistent layer obtaining the results according to the specified (first, count) pair... So, what happens in practice... that when navigating the size() method retrieves the before obtained iterator.size(), and not the new one that will be obtained immediatly after it, when calling to iterator(...). So, if the order was this: 1 iterator(...) 2 size() The problem would be solved... Please, would you mind explaining my how to resolve this issue? Thank you! M - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDE V ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Strategy to avoid new instances of pages and panels
One style of Wicket development is to use a single page for the entire application, switching components within the page. If you did that, your pages could be large components chosen by the single master page. You could keep these page components in application or session storage to be re-used. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, November 03, 2006 1:31 AM To: wicket-user@lists.sourceforge.net Subject: [Wicket-user] Strategy to avoid new instances of pages and panels Hi all! I am looking for a pattern, strategy or code example how to avoid creation of new page Instances when a user reloads a page. Can someone give my a hint how to achieve following behaviour: - static pages which have only a single instance during whole application lifecycle ? - some kind of page and/or factory or proxy to reuse instances? Any best practice or some examples would be nice. Thank you very much, Maciej Bednarz - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Components Entirely In Java?
To get a set of components that the page developer
could use without having to write any HTML, the
application architect could decide on a set of building blocks needed by page
developers, and implement them with the associated HTML files.
These could include basic form components,
and components for arranging subpanels -- e.g. vertical stacking, horizontal
placement, whatever. Then the user could build pages by instantiating and
subclassing these pre-build components without adding any new
HTML.
(To insert a subpanel in specified locations
of the panel-arranger, the user would create an anonymous subclass of the
panel-arranger which overrode the methods for creating the individual panels
that get arranged. This is so that the panel-arranger can pass the
needed wicket-id to the over-ridden method that creates that panel, without
the user having to know the specific wicket-ids coded in the panel-arranger's
HTML page.)
The difficulty is in deciding on the set of building blocks
needed. It's sort of like designing an application-oriented programming
language. I built my application this way, but I was the sole developer --
so I was continually refining and adding to my set of general-pupose and
application-oriented building blocks as I went along. To build truly
flexible with general-purpose building blocks that do not limit the developer's
styling of the application would be a huge project. It would be something
like implementing the Echo (http://www.nextapp.com/platform/echo1/echo/)
or Echo2 (http://www.nextapp.com/platform/echo2/echo/)
framework in Wicket.
In fact, if you really don't want the page-developers to be
coding any HTML, the Echo or Echo 2 framework may be what you're looking
for. But then you'll be limited to building upon whatever functionality
their components provide.
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Igor
VaynbergSent: Wednesday, October 18, 2006 11:27 PMTo:
wicket-user@lists.sourceforge.netSubject: Re: [Wicket-user]
Components Entirely In Java?
you can encapsulate a great deal of markup and css into the
components, however unless you go to extremes some basic knowledge of html is
still needed. wicket doesnt use layout managers so you have to provide some
basic html - at least span tags to position the components. in
some cases if the components being added are just stacked you can use a repeater
like RepeatingView to take care of that so end users can goMyPage()
{ getNavContainer().add(new MyNewComponnet1());
getNavContainer().add(new MyNewComponent2());
getBodyContainer().add(new
MyNewCompoenent3());}etc-Igor
On 10/18/06, Jonathan
Sharp [EMAIL PROTECTED]
wrote:
I'm
a UI developer on a team of about 10 and are in the evaulation process of
wicket. Pardon my ignorance if this is obvious or misses the boat...
How complex would it be to provide a jar of components to our
developers that they can use to build their interfaces without having to touch
HTML? The goal would be that they would build the application without having
to write any HTML but simply "append" components to each other similar to how
you can with the DOM browser side. Our AppBasePage would then have a
wicket:child/ tag which is where it would render these components.
Does this make sense? Example Components:- Form- FieldSet-
FieldPair- SaveButtonDevelopers would then:class
MyPage extends AppBaseBase { public MyPage()
{ Form f = new Form("myForm");
f.add(new SaveButton("id",
"Label"));
add(f); }}Cheers,-js-Using
Tomcat but need to do more? Need to support web services, security?Get
stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache
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-
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Get stuff done quickly with pre-integrated technology to make your job easier
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Re: [Wicket-user] DateTable with alternating row color
Title: Wicket-user Digest, Vol 4, Issue 34 In the Wicket 1.2 Examples I noticed thatDefaultDataTablesets the odd/even attribute, and an external.CSS file interpreted the attribute to color the rows. I don't believe DataTable comes with any such row-coloring rules built in. So if you're using DefaultDataTable and not getting odd-even row colors, check your .CSS file. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Stefan LindnerSent: Wednesday, September 06, 2006 6:13 AMTo: wicket-user@lists.sourceforge.netSubject: DateTable with alternating row color I just wonder about the place where in the DataTableExample (in wicket examples) the alternating style for the table rows (tr class="even"... and tr class="odd".. has to be set? Or does this the DefaultDataTable class for me. Or does it the SortableDataProvider? Or do I have to it on my own (as in the displaytag examples)? If it should happen automatically, it does not work in Wicket 2.0. Stefan - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] WebObjects open source?
The WOLips Eclipse plugin sounds pretty impressive! Yes, keeping the Wicket component hierarchy in sync between the Java file and the HTML file can be annoying. (That's one reason I am intrigued by the Echo2 approach -- treat HTML as machine language and eliminate it from the application definition completely!) My approach for Wicket is to work in terms of panels and to keep the nesting in any single component or page trivially simple. (It's analogous to the principle of keeping function/method definitions short enough to fit on one screen.) If you don't like the way Java flattens the component hierarchy with a series of comp.add(...) instead of tag nesting, you can use nonstandard indentation to show the hierarchy: ... Build components ... page.add(cI); cI.add(cIA); cIA.add(cIA1); cIA.add(cIA2); cI.add(cIB); page.add(cII); cII.add(cIIA); cIIA.add(cIIA1); cIIA.add(cIIA2); cIIA2.add(cIIA2i); cIIA2.add(cIIA2ii); cII.add(cIIB); -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Alexis Sent: Thursday, August 31, 2006 5:16 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] WebObjects open source? How you do (refactoring) with WO : WOLips (eclipse plugin) create a new component (juste give it a name), open in WOBuilder (WYSIWYG editor for editing simlessly both HTML template and binding file, in fact you don't have to know there's 2 files), cut (or copy) past the part of your existing page you want to be isolated in the new component. Define the component API with WOBuilder. That's it, drop it in your existings pages, set the bindings. That's why the tools are here. (read the manuals about WObuilder if your interested) Now another question for wicket and refactoring, how can you keep in sync HTML file and Java code without tools ? I'm not only talking about wicket:id attributes, but also all the component hierarchy ? If you doing big refactoring, that's 2 files to maintain. By the way, yes HTML is difficult to read, but i prefer reading HTML + bindings in WOBuilder where you could see in 5 secondes the hierarchy than only Java where you have to look for comp.add(...) all flatened. That would be awesome if the eclipse (or netbeans) plugin could synchronize this, that might be tricky to do but interesting. That's also the reason why i like WO, you open a large page or component and within 1 mins you have a good idea of his behaviour. Now with Wicket, you must have some computer brain to understand in 1 mins what a page is doing. Now don't get me wrong, i appreciate a lot of good stuff about wicket and the efforts you guys are putting in it. And let's face it, WO's core developpers are/were not doing it for free :) -- View this message in context: http://www.nabble.com/WebObjects-open-source--tf2177391.html#a6076647 Sent from the Wicket - User forum at Nabble.com. - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] WebObjects open source?
Why do I assume that Web Objects provides only a fixed and limited set of components to work with? Just my knowledge of most other web frameworks. I read a book on JSF, and most of it was about referencing a fixed and limited set of components from within my enhanced-HTML file. The chapter on creating new components looked very complicated to me -- it appeared that one had to understand the internals of JFS to build a new component. I read a book on ASP.NET -- again, most of the book was about how to write tags to instantiate and configure a pre-built component into a web page; again, the chapter(s) on creating and using new components (even merely by subclassing or assembling groups of interacting standard componets) looked very difficult. Even if the component creation part was not difficult, one still had to configure it into the Visual Studio tool to access it -- unless one wants to hack into the huge ugly enhanced-HTML tag file Visual Studio generates (which was most users never look at). I read a book on JSP, and the chapters on creating custom tags made the process look like a big production. First of all, the methodology for programming a tag seemed peculiar, with all the special values I had to return (use the body, don't use the body, ...), and the fact that the Java code had to create and return properly-escaped strings of HTML text. Then I then had to insert an entry into an XML tag library descriptor file, and I had to add an XML descriptor into my web page to tell it to use that tag library. Let me just say that I was already a SCJP, yet the process of creating custom tags was far from intuitive to me. If I embed several JSF, JSP or ASP.NET tags in an HTML page and then discover that I need something similar on many other pages, there is no easy way to refactor my application to abstract that portion of my page into a new component. I'm not talking about mere include files; I'm talking about components with a choice of possible contructors taking various types of parameters. Given how horrendously complex this seemingly mundane task is in most web frameworks, it would be a pleasant surprise indeed to learn that Web Objects makes it easy. The reason the task is easy in Wicket is that one doesn't build web pages by nesting custom framework-oriented tags in a tage file. Simple attributes in plain HTML tells me where in the HTML file a component should be rendered, but everything else about that component's definition, configuration and use is done in Java code. So building and using custom web display components is no more difficult in principle than subclassing and using classes from the standard J2SE packages. Is everything in WebObjects also done in Java code, or do you build web pages by embedding special WebObject tags and subtags in your HTML file just as in most other frameworks? What is Web Object's process for abstracting part of a page into a new component with its own API? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Anders Peterson Sent: Wednesday, August 30, 2006 2:21 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] WebObjects open source? Frank Silbermann wrote: What facility does Web Objects provide that lets you avoid having to re-set those properties fifty times? ... and however you choose to construct your web display object it is (naturally) also a component that can be used as a building block for other web display objects. (Isn't the inconvenience of adding slightly-customized variations of components to the toolset the reason most Swing GUI programmers end up building their GUI in code instead of using some IDE's graphical GUI-painter?) Most people just don't want to change their way of doing things (and some graphical GUI-painters are not very good). You seem to think there is only a fixed and limited set of components to work with - why assume something like that? /Anders -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Anders Peterson Sent: Tuesday, August 29, 2006 12:51 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] WebObjects open source? Not sure what to say... it makes me productive... It's not really fair to compare Wicket and WebObjects (WO). WO is a whole package of frameworks and tools that function well together (but can be used independently). Wicket needs team mates to replace WO entirely. With Wicket any html and java editors will do just fine. This is generally a good thing (I think) but it's also a restriction. With WebObjects the tools are part of what makes the package great: Start up the WOBuilder tool, create a WODisplayGroup instance and start (visually) combining WOComponents and binding them to data. It's fast and intuitive... /Anders http://developer.apple.com/documentation/WebObjects/Conceptual/WO53_WO Bu ilderGuide/ http
Re: [Wicket-user] WebObjects open source?
The _Java_ code is cleaner and simpler withWeb Objects, but in Wicket the HTML-based tag file is much cleaner. That component configuration information has to go _somewhere_! Personally, I find it much easier to read Java syntaxthan HTML. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Igor VaynbergSent: Wednesday, August 30, 2006 3:43 PM - Java code is MUCH cleaner with WO, you keep in code only data pushed in thepresentation layer and actions. No need to add components and configure them in java code.how is this MUCH cleaner? just because there is no code? you can say code for a framework that is configured via xml is also cleaner because there isnt any configuration code. - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] WebObjects open source?
Igor has already mentioned one advantage of declaring and configuring components in code -- it is easy to make the presentation very dynamic. For example, when displaying products from a catalog, the page constructor can vary the display-components used depending upon the type of product chosen by the user. (You could have different types of panels for different types of products, any one of which is embedded into the same basic page object.) But I have another consideration in mind. The advocates of Extreme Programming argue that it is naïve to think one can always design first and then implement. They argue that it is more realistic to start coding a few use cases and refine the design along the way, as experience adds insight and as the user's requirements become clearer. To refine the design of existing code they recommend _refactoring_ (see Martin Fowler's book on that topic). Suppose I've built a page and later decide, in view of the DRY (Don't Repeat Yourself) principle that a portion of my page should be refactored into a custom component. With Wicket I can move some of the page's Java code into my new panel class, and move HTML snippets from the page's associated HTML to the panel's HTML file. This process seems not too far removed from Fowler's Extract Class refactoring. To me, the ability to easily refactor is one advantage of having the components added and configured in code. To do such a refactoring in Web Objects, I am guessing that one would have to work with the generated tag files (a mixture of HTML and component configuration tags), which I doubt is practical to do by hand. So unless the tool implements this kind of refactoring directly (which I doubt), you would create the re-usable component _from_scratch_ using the display-painting tool again, throwing away components that were painted earlier. I fear that this wasted effort may be a disincentive against presentation-layer refactoring -- with the result that final designs won't be as tight as they could have been. (On the other hand, if the Web Objects tool makes re-doing the work sufficiently easy, the waste of redoing work may be insignificant.) I can see that some applications might be easier to build with Web Objects, just as for building certain types of fat clients Visual Basic 6 is easier to use than Swing. But for more sophisticated presentation logic, the Wicket approach will facilitate the use of design patterns, refactoring, and other modern OO techniques. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Alex Sent: Wednesday, August 30, 2006 3:15 PM To: wicket-user@lists.sourceforge.net - Java code is MUCH cleaner with WO, you keep in code only data pushed in the presentation layer and actions. No need to add components and configure them in java code. - Components are declared in HTML, configured in another file, binding (configuring) the component with the java class. This approach need tools, WO has some nice tools for this. - Both frameworks make creation of custom components easy (unlike JSF!!!) - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] WebObjects open source?
Just glancing at your link for a few seconds, and reading the earlier comment that it looks like ASP.NET with VS.NET, I would guess that Web Objects provides a library of components that you can paint onto your pages, automatically generating the custom tags in your HTML file. Suppose you are customizing a component by setting many properties, and using it with those settings on fifty different webpages. In Wicket, I can create a method which instantiates a web display object, sets its properties and returns it. I can then call that method every time I want to instantiate a web object with those settings. What facility does Web Objects provide that lets you avoid having to re-set those properties fifty times? (Isn't the inconvenience of adding slightly-customized variations of components to the toolset the reason most Swing GUI programmers end up building their GUI in code instead of using some IDE's graphical GUI-painter?) /Frank -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Anders Peterson Sent: Tuesday, August 29, 2006 12:51 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] WebObjects open source? Not sure what to say... it makes me productive... It's not really fair to compare Wicket and WebObjects (WO). WO is a whole package of frameworks and tools that function well together (but can be used independently). Wicket needs team mates to replace WO entirely. With Wicket any html and java editors will do just fine. This is generally a good thing (I think) but it's also a restriction. With WebObjects the tools are part of what makes the package great: Start up the WOBuilder tool, create a WODisplayGroup instance and start (visually) combining WOComponents and binding them to data. It's fast and intuitive... /Anders http://developer.apple.com/documentation/WebObjects/Conceptual/WO53_WOBu ilderGuide/ http://developer.apple.com/documentation/webobjects/Reference/API/com/we bobjects/appserver/WODisplayGroup.html http://developer.apple.com/documentation/Webobjects/Reference/API/com/we bobjects/appserver/WOComponent.html Eelco Hillenius wrote: :) It's one of my favorite parts of Wicket, so sure. What about the strong points of WebObjects, what are the things you really like about that? Eelco On 8/29/06, Anders Peterson [EMAIL PROTECTED] wrote: Sure, if it has to be just like Wicket to compete; you win. ;-) -- --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=1216 42 -- http://ojalgo.org/ Mathematics, Linear Algebra and Optimisation with Java - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Creating Panel to display a list of Panels
I had a similarneed. I wanted apanel that
would displayseveral arbitrary sub-panels
side-by-side:
abstract public class HorizontalPanelGrouper extends
Panel{
public HorizontalPanelGrouper(
Stringid ) {
super(id);
add(
"wicketIdForPanel1", createPanel1("wicketIdForPanel1") ); //
"wicketIdForPanel1" matches HTML
file
add(
"wicketIdForPanel2", createPanel1("wicketIdForPanel2") ); //
"wicketIdForPanel2"matches HTML
file
add(
"wicketIdForPanel3", createPanel1("wicketIdForPanel3") ); //
"wicketIdForPanel3" matchesHTML file
}
abstract Panel createPanel1(String
id);
abstract
Panel createPanel2(String id);
abstract
Panel createPanel3(String
id);
}
Whenever I needed my
panel-of-panels I would instantiate an anonymous subclass that overrode the
createPanelX methods:
Panel p = new
HorizontalPanelGrouper(wicketIdForContainerPanel)
{
Panel
createPanel1(String id) {
return
new SomePanelClass( id,
...);
}
Panel
createPanel2(String id) {
return
new AnotherPanelClass( id,
...);
}
Panel
createPanel3(String id) {
return
new YetAnotherPanelClass( id,
...);
}
}
This way, I didn't have
to remember the actual wicket:id used by the HorizontalPanelGrouper's HTML file
when creating sub-panels for the HorizontalPanelGroup
object.
If I wanted to modify
the layout, all I had to do was create a trivial subclass (i.e. one which
extended the base class without changing or adding anything at the java leve),
but associated with a new HTML
file.
If you wanted a variable
number of sub-panels, instead of abstract methods you could have implement some
of the sub-panels to be trivially empty panels. Alternately, you could
have HorizontalPanelGrouper implement those methods with empty invisible panels
as defaults. Then youneed override only some of the panel-creating
functions.
The same approach could
be used if you wanted a panel containing a ListView of sub-panels:
public class
PanelList_Panel extends Panel
{ public PanelList_Panel(String id)
{
super(id);
add(
new ListView("panelList", createPanelList("panelListElement") ) {
//literal strings are fromHTML
file
protected void populateItem(ListItem listItem)
{
listItem.add( (Panel) listItem.getModelObject()
);
}
} );
}
abstract
ListPanel createPanelList( String id
);}
When using
PanelList_Panel I would create an anonymous subclass that implemented the
abstract method:
Panel p = new
PanelList_Panel(wicketIdForAggregatorPanel )
{
public
ListPanel createPanelList( String id )
{
...CREATE A
BUNCH OF PANELS USING id AND ADD THEM TO A java.util.List AND RETURN
IT
}
}
When building
components, my natural inclination is to make them configurable via constructor
parameters and methods to be called post-construction. With Wicket,
however, I frequently had to design my components to accept configuration via
the overriding of abstract or default methods by anonymous subclasses. It
felt weird, but eventually I got used to it. I was a functional programmer
in a past life, and it might have felt more natural if I could have passed
functions (like C# delegates) as values to my constructors, but Java doesn't
make that easy.
Alternatively, I suppose
I could have built helper classes much like Swing's event-handler classes.
The helper classes could have contained the abstract methods, and I could have
passed concrete subclasses to my component constructors. But I didn't want
to have to define seperate helper classes whose only purpose was to contain
overrideable methods.
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Charles A
DealSent: Thursday, August 17, 2006 2:44 PMTo:
wicket-user@lists.sourceforge.netSubject: [Wicket-user] Creating
Panel to display a list of Panels
I am in the process of attempting to
rebuild our non-framework, completely homegrown web application as a Wicket
application. So, I am very new to the Wicket way and find myself
struggling with different things such as proper page construction techniques for
relatively complex data-enabled pages. So far, I have been successful in
getting a Wicket app running that resembles our existing app, just a lot
cleaner. I am having trouble implementing a GUI comcept that we use quite
frequently in our current app. In
our current app, we typically have long pages of data fields available to the
user, in an attempt to avoid information overload, we implemented "toggle
sections" that hide the contents of a section of the page until the section
header or "twistee" is clicked, at which point the contents become
visible. This is relatively simple in our app, there are two divs, one for
the header (name of section, usually one line) and the other for the contents.
The content div is "display:none" when the page loads and when the header
is clicked to open, that attribute is removed. Pretty simple.
I know that I could do the same think in
the Wicket app, but it didn't seem to take advantage of Wicket's
Re: [Wicket-user] Discussing Wicket
Igor Vaynberg [EMAIL PROTECTED] 7/29/06: we do evangelize the OO wherever we can, but it mostly falls on deaf ears. have you ever seen a struts app? in most struts apps the notion of a class is used mostly as a namespace to group some functions together. its hard to explain something when most people dont understand what you are talking about. at least this has been my frustrating experience. like that blog from the tapestry guy ( http://greggbolinger.blogspot.com/2006/01/i-say-tapestry-you-say-wicke t.html and discussion we had here on the list ) saying listview is too complex to understand because it has an abstract callback method you have to implement and because it is an anoymous class. Wicket is complex, in the same way that Swing is more complex than coding simple HTML form elements. (In fact, many people complain about the complexity of Swing, but that complexity is there for a reason. Unfortunately, simplest possible examples do not motivate the need for the complexity.) I think we need to come up with some reasonable examples that motivate the use of OO in development of presentation logic -- examples in which Wicket elegantly factors out redundancy that would make applications in other frameworks sprawl like the suburbs of Houston. The challenge is to come up with an example which is small enough to fit in a short blog article. What were the compelling examples which convinced people of the need for OO-programming fifteen years ago? How would a Swing text author motivate the need for object-orientation in the presentation logic of a desktop application? We could adapt those examples to the web domain. On 7/29/06 Eelco Hillenius wrote: Yeah. It seems to be a sad reality that many frameworks have it as their holy grail to save their users from writing any code. Whereas I prefer the idea of a web framework that saves users from having to write any HTML, CSS or Javascript -- or at least one that at least lets users hide those ugly details, just as a data access object hides the ugly SQL strings. And many programmers seem to agree that's what they want. Those are the ones we've got to try to put out of business. :-) That's how you get those famous 'framework coders'. However, I think we're using the word `framework' with a different connotation. The framework programmers described in recent blogs are generally competent programmers who avoided having to learn messy framework API details hidden by architectural code provided by others in the project. In contrast, most web developers revel in the messy web-API details, but don't understand the fundamentals of programming. - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Discussing Wicket
You don't _need_ to know / use OO to program in Java or C++, but at least they _allow_ you to use OO in your programs. With all the reading I've done on JSF, I still don't have a clue as to the waysomeone who _wanted_ to use OO in structuring the presentation layer could do so. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Igor VaynbergSent: Saturday, July 29, 2006 9:54 AMTo: wicket-user@lists.sourceforge.netSubject: Re: [Wicket-user] Discussing Wicket its not only that - most frameworks are not built around OO so the developer is not required to know it/use it. i think the skill is mostly lost in the webspace.-Igor On 7/29/06, Eelco Hillenius [EMAIL PROTECTED] wrote: On 7/29/06, Igor Vaynberg [EMAIL PROTECTED] wrote: we do evangelize the OO wherever we can, but it mostly falls on deaf ears. have you ever seen a struts app? in most struts apps the notion of a class is used mostly as a namespace to group some functions together. its hard to explain something when most people dont understand what you are talking about. at least this has been my frustrating experience. like that blog from the tapestry guy ( http://greggbolinger.blogspot.com/2006/01/i-say-tapestry-you-say-wicket.html and discussion we had here on the list ) saying listview is too complex to understand because it has an abstract callback method you have to implement and because it is an anoymous class.Yeah. It seems to be a sad reality that many frameworks have it astheir holy grail to save their users from writing any code. And many programmers seem to agree that's what they want. That's how you getthose famous 'framework coders'.Eelco-Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share youropinions on IT business topics through brief surveys -- and earn cashhttp://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___Wicket-user mailing listWicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Discussing Wicket
As long as you separate the business logic (e.g. authentication rules) from the presentation logic (the HTML), you can use the base language's object-orientation with most any framework. The real winner for wicket is the use of object-orientation in the display logic. I think you may be onto something with the shopping cart style application. You define an abstract product display panel which is subclassed by a variety of concrete leaf classes for various products and product types, and you define a component (e.g. a tabbed panel) to display an arbitrary collection of these products. For each product the database could contain a display type and a serialized property-list that tells the application whatever it needs to know for displaying the product. Then you could add a new product and its display simply by adding a record to the database. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Scott Swank Sent: Wednesday, August 09, 2006 11:36 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Discussing Wicket We have two applications that are largely the same. However, (along with some minor variations between them) they have completely different authentication strategies. The call center version entails logging in once at the start, while the retail version entails authenticating yourself every time a purchase is made. While I don't have this working yet --largely due to the fact that I'm still figuring out how Wicket's authentication model works. I am however thoroughly confident that the approach Wicket takes will make this far easier to implement than is has been in our legacy apps. For an article-length review of the advantages of an OO web framework, I really like a shopping cart style app that sells at least two substantially distinct products. Maybe something like... main page tabbed panel product A panel (extends abstract product panel, which contains a date picker and a list view of abstract product) -- this panel adds the product A item to the abstract product panel's list view product B panel (extends product panel) -- add product B shopping cart contains a list view of abstract product add product A or product B Initially there could just be html for the AbstractProductPanel, however then html could be added for the ProductAPanel to restructure its layout. Or is that simply too much for an article? On 8/9/06, Frank Silbermann [EMAIL PROTECTED] wrote: You don't _need_ to know / use OO to program in Java or C++, but at least they _allow_ you to use OO in your programs. With all the reading I've done on JSF, I still don't have a clue as to the way someone who _wanted_ to use OO in structuring the presentation layer could do so. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Igor Vaynberg Sent: Saturday, July 29, 2006 9:54 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Discussing Wicket its not only that - most frameworks are not built around OO so the developer is not required to know it/use it. i think the skill is mostly lost in the webspace. -Igor On 7/29/06, Eelco Hillenius [EMAIL PROTECTED] wrote: On 7/29/06, Igor Vaynberg [EMAIL PROTECTED] wrote: we do evangelize the OO wherever we can, but it mostly falls on deaf ears. have you ever seen a struts app? in most struts apps the notion of a class is used mostly as a namespace to group some functions together. its hard to explain something when most people dont understand what you are talking about. at least this has been my frustrating experience. like that blog from the tapestry guy ( http://greggbolinger.blogspot.com/2006/01/i-say-tapestry-you-say-wicke t.html and discussion we had here on the list ) saying listview is too complex to understand because it has an abstract callback method you have to implement and because it is an anoymous class. Yeah. It seems to be a sad reality that many frameworks have it as their holy grail to save their users from writing any code. And many programmers seem to agree that's what they want. That's how you get those famous 'framework coders'. Eelco -- --- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEV DEV ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user -- --- Using Tomcat but need to do more? Need to support web services, security
[Wicket-user] Discussing Wicket
It seems to me that most descriptions of Wicket that I've seen on the web focus on two properties: the absence of configuration files and the radical separation of HTML from Java code. (Then readers debate whether the absence of configuration files limit flexibility and whether the use of standard tool-friendly HTML is all that important.) It seems to me that Wicket evangelists should put more effort on Wicket's object orientation. The key questions we should ask when comparing Wicket to another component-oriented framework (e.g. Tapestry or JSF) are the following: (1) If the user wishes to create a panel that assemblesvisual components or sub-panels that react to each others events, and which provide/handle events to be hooked to other arbitrary components on the page, what facility does your framework provide to packagesuch anassembly in a re-usable format? (2) If I have a complex, feature-rich component that I want to use on many web-pages, and some of the configuration choices will be set the same way for all of them, what facility does your framework give me for creating a facade around this component that will set these defaults for me -- so I don't have to repeat myself on page after page? (3) If some of the pages which use this component need it to provide extra enhanced or specialized behavior, how does your framework make it easy for me to create a new component thatextends the properties and behavior of the base component? We should identify a few simple examples of such usesto contrast Wicket's powerwith other frameworks' shortcomings. After the big-deal object-orientation revolution of the late-1980s/early-1990s, it astounds me that so many programmers can ignore the importance of object-orientationfor coding presentation logic. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] DataView (extentions)
Several months ago I mentioned that I was developing classes based on WicketExtensions' DataTable and SortableDataProvider to display arbitrary SQL SELECT result sets, with arbitrary sorting capability built-in. My approachis only appropriate for small result sets or for prototyping, as theResultSet's datais kept in the data provider between page renderings: The developer overrides the method that generates the SQL query string. If the generated text varies from one postback to the next (or if an event sets a special flag), the data is replaced by a new query to the database. A general routine handles sorting events (column-header clicks) by delegating to column type's default comparator and the built-in ArrayList sorting capability. A hook isprovidedwhere thedeveloper canspecify massaging of the databetween download and presentation, e.g.to compute and adda summary row, to insert additional computed columns, or toreplace date or number objectsby formatted strings (to bypass DataTable's default rendering of these objects). (Perhaps someone can adapt some of my ideas to a more general solution that doesn't keep result-set data in the DataProvider between postbacks.) My implementationconsists of just a few hundred lines of code infour classes,two of which are trivial javabeans. A few readers of this group expressed interest; what would be the easiest way of sharing? I suppose I could build a tiny jar file and attach it to an e-mail, but it might be easier to discuss the implementation if I send a few e-mails, each directly containing the source code for one or two classes. Would that be an appropriate use of this mailing list? From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Vincent JenksSent: Wednesday, March 15, 2006 9:29 AMTo: wicket-user@lists.sourceforge.netSubject: Re: [Wicket-user] DataView (extentions) I'd love to see this (along w/ an example or two on usage) ;) On 3/15/06, Frank Silbermann [EMAIL PROTECTED] wrote: I have come up with my own subclass of DataTable and implementation of IDataProvider to display any arbitrary database java.sql.ResultSet. The basic idea is that my IDataProvider implementation contains a List of rows, each row consisting of a List of Object. Also in the implementation is an array of descriptors, one per column, each of which contains the column name and an indicator as to whether I want to be able to sort on that column. (The column name comes from the ResultSetMetadata; a method is provided to set the sortability flag.) My implementation of the abstract method to deliver a sequence of rows will delegate to the List.sublist() command from the Java Collections API, and each time the DataTable delivers a sort criteria I apply the Collections.sort() method to my list of rows, passing it a Comparator that delegates to the Comparator of the Object at the relevant column index. My implementation of IDataProvider can also look at my array of column descriptors and generate a list of IColumn objects (needed to construct the DataTable). It's actually a bit more complicated than that, because sometimes the user needs to add one or more summaryrows or add computed columns. The code is actually quite compact; when I'm finished I'll post it to the list if there is any interest. -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Igor VaynbergSent: Tuesday, March 14, 2006 5:21 PMTo: wicket-user@lists.sourceforge.netSubject: Re: [Wicket-user] DataView (extentions) there is also a DataTable component which wraps DataView+paging+sorting.-Igor On 3/14/06, Vincent Jenks [EMAIL PROTECTED] wrote: I'm using 1.1.1 Are there any plans to whittle down the amount of code it takes to implement paging sorting? Has it changed at all in 1.2? I spent a lot of time w/ ASP.NET (which wicket feels quite similar to) and there's a DataGrid component that has properties to set paging sorting w/o any extra work. Something like that would be really convenient. - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] DataView (extentions)
I suppose it could go into: Wicket Wiki // Reference Library How To Do Things in Wicket // Database Interaction -- though it would be much longer than any of the other articles (aside from those which are external links). Also, how would I create the new page into which I could enter my text? (Would I have to submit my words and code as HTML? Embarassing to say, but I don't have much experience with this, or with Wikis ...) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Martijn Dashorst Sent: Wednesday, July 12, 2006 11:20 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DataView (extentions) Why don't you create a wiki article on this subject? Martijn On 7/12/06, Frank Silbermann [EMAIL PROTECTED] wrote: Several months ago I mentioned that I was developing classes based on WicketExtensions' DataTable and SortableDataProvider to display arbitrary SQL SELECT result sets, with arbitrary sorting capability built-in. My approach is only appropriate for small result sets or for prototyping, as the ResultSet's data is kept in the data provider between page renderings: The developer overrides the method that generates the SQL query string. If the generated text varies from one postback to the next (or if an event sets a special flag), the data is replaced by a new query to the database. A general routine handles sorting events (column-header clicks) by delegating to column type's default comparator and the built-in ArrayList sorting capability. A hook is provided where the developer can specify massaging of the data between download and presentation, e.g. to compute and add a summary row, to insert additional computed columns, or to replace date or number objects by formatted strings (to bypass DataTable's default rendering of these objects). (Perhaps someone can adapt some of my ideas to a more general solution that doesn't keep result-set data in the DataProvider between postbacks.) My implementation consists of just a few hundred lines of code in four classes, two of which are trivial javabeans. A few readers of this group expressed interest; what would be the easiest way of sharing? I suppose I could build a tiny jar file and attach it to an e-mail, but it might be easier to discuss the implementation if I send a few e-mails, each directly containing the source code for one or two classes. Would that be an appropriate use of this mailing list? From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Vincent Jenks Sent: Wednesday, March 15, 2006 9:29 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DataView (extentions) I'd love to see this (along w/ an example or two on usage) ;) On 3/15/06, Frank Silbermann [EMAIL PROTECTED] wrote: I have come up with my own subclass of DataTable and implementation of IDataProvider to display any arbitrary database java.sql.ResultSet. The basic idea is that my IDataProvider implementation contains a List of rows, each row consisting of a List of Object. Also in the implementation is an array of descriptors, one per column, each of which contains the column name and an indicator as to whether I want to be able to sort on that column. (The column name comes from the ResultSetMetadata; a method is provided to set the sortability flag.) My implementation of the abstract method to deliver a sequence of rows will delegate to the List.sublist() command from the Java Collections API, and each time the DataTable delivers a sort criteria I apply the Collections.sort() method to my list of rows, passing it a Comparator that delegates to the Comparator of the Object at the relevant column index. My implementation of IDataProvider can also look at my array of column descriptors and generate a list of IColumn objects (needed to construct the DataTable). It's actually a bit more complicated than that, because sometimes the user needs to add one or more summary rows or add computed columns. The code is actually quite compact; when I'm finished I'll post it to the list if there is any interest. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Igor Vaynberg Sent: Tuesday, March 14, 2006 5:21 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DataView (extentions) there is also a DataTable component which wraps DataView+paging+sorting. -Igor On 3/14/06, Vincent Jenks [EMAIL PROTECTED] wrote: I'm using 1.1.1 Are there any plans to whittle down the amount of code it takes to implement paging sorting? Has it changed at all in 1.2? I spent a lot of time w/ ASP.NET (which wicket feels quite similar to) and there's a DataGrid component that has properties to set paging sorting w/o any extra
[Wicket-user] Displaying arbitrary SQL Query result sets
Since I've already created the .jar file for Michael, I might as well
offer it to everyone.
I haven't included any examples for actually creating a subclass of my
dataprovider (common.rdbms.QueryResult). At a minimum, you can simply
override:
protected String generateQueryString() { return select * from
table; }
After you have created the QueryResult object (myQueryResult), but
before you create an instance of common.rdbms.QueryResultDataTable with
it, you may call
public void setColumnSortable(int column)
on the QueryResult object to indicate that the data should be sortable
on this column (my indexes are zero-based, for a five-column table you
may call this with values of 0 through 4). If you do that, then when
you create the QueryResultDataTable it will know to make that column
header a sort link.
Look at components.QueryDataPanel for a reusable panel that creates a
QueryResultDataTable for a QueryResult and displays it in a wicket
Panel. It also does a bunch of other stuff that you won't be interested
in, e.g. providing a label which is optionally a pop-up link, and adds a
button that lets the user download the table as a MS Excel file). But
removing features is easier than adding them!
Please let me know what you think, or any questions about the more
sophisticated options.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Michael
Welter
Sent: Wednesday, July 12, 2006 11:45 AM
To: wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user] DataView (extentions)
Hello Frank,
I have just begun developing an application using paged tables and
IDataProvider. My environment is hibernate with thousands of items to
display, so hopefully the laze instantiation will keep memory
utilization low.
Anyhow, I would like to take a peek at your code. If you don't mind,
just tar the directory and attach to a personal email.
Thanks,
Mike
Frank Silbermann wrote:
Several months ago I mentioned that I was developing classes based on
WicketExtensions' DataTable and SortableDataProvider to display
arbitrary SQL SELECT result sets, with arbitrary sorting capability
built-in.
My approach is only appropriate for small result sets or for
prototyping, as the ResultSet's data is kept in the data provider
between page renderings:
*
The developer overrides the method that generates the SQL query
string. If the generated text varies from one postback to the
next (or if an event sets a special flag), the data is replaced
by
a new query to the database.
*
A general routine handles sorting events (column-header clicks)
by
delegating to column type's default comparator and the built-in
ArrayList sorting capability.
*
A hook is provided where the developer can specify massaging of
the data between download and presentation, e.g. to compute and
add a summary row, to insert additional computed columns, or
to replace date or number objects by formatted strings (to
bypass
DataTable's default rendering of these objects).
(Perhaps someone can adapt some of my ideas to a more general solution
that doesn't keep result-set data in the DataProvider between
postbacks.)
My implementation consists of just a few hundred lines of code in four
classes, two of which are trivial javabeans. A few readers of this
group expressed interest; what would be the easiest way of sharing? I
suppose I could build a tiny jar file and attach it to an e-mail, but
it might be easier to discuss the implementation if I send a few
e-mails, each directly containing the source code for one or two
classes. Would that be an appropriate use of this mailing list?
-
Using Tomcat but need to do more? Need to support web services,
security?
Get stuff done quickly with pre-integrated technology to make your job
easier Download IBM WebSphere Application Server v.1.0.1 based on Apache
Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642
___
Wicket-user mailing list
Wicket-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wicket-user
showingResultSets.jar
Description: showingResultSets.jar
-
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642
___
Wicket-user mailing list
Wicket-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Displaying arbitrary SQL Query result sets
Ifsomeone provides mea sample quickstart
project that includes something like hsqldb and populates a database on
start-up,I'll modify it to display some database queries using my
classes!
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Igor
VaynbergSent: Wednesday, July 12, 2006 12:57 PMTo:
wicket-user@lists.sourceforge.netSubject: Re: [Wicket-user]
Displaying arbitrary SQL Query result sets
it would be really great if you could provide a quickstart that
includes something like hsqldb and populates a database on startup so we can
actually see it in action.at least thats what it will take for me to
give it a looksee due to my busy schedule - if you want feedback that is.
-Igor
On 7/12/06, Frank
Silbermann [EMAIL PROTECTED]
wrote:
Since
I've already created the .jar file for Michael, I might as welloffer it to
everyone.I haven't included any examples for actually creating a
subclass of mydataprovider (common.rdbms.QueryResult).At a
minimum, you can simply override:
protected String generateQueryString() { return "select * fromtable";
}After you have created the QueryResult object (myQueryResult),
butbefore you create an instance of common.rdbms.QueryResultDataTable
withit, you may call public void
setColumnSortable(int column)on the QueryResult object to indicate
that the data should be sortableon this column (my indexes are zero-based,
for a five-column table you may call this with values of 0 through
4).If you do that, then whenyou create the
QueryResultDataTable it will know to make that columnheader a sort
link.Look at components.QueryDataPanel for a reusable panel that
creates a QueryResultDataTable for a QueryResult and displays it in a
wicketPanel.It also does a bunch of other stuff that you won't
be interestedin, e.g. providing a label which is optionally a pop-up link,
and adds a button that lets the user download the table as a MS Excel
file).Butremoving features is easier than adding
them!Please let me know what you think, or any questions about the
moresophisticated options. -Original Message-From: [EMAIL PROTECTED][mailto:[EMAIL PROTECTED]
] On Behalf Of MichaelWelterSent: Wednesday, July 12, 2006 11:45
AMTo: wicket-user@lists.sourceforge.netSubject:
Re: [Wicket-user] DataView (extentions) Hello Frank,I have
just begun developing an application using paged tables
andIDataProvider.My environment is hibernate with thousands of
items todisplay, so hopefully the laze instantiation will keep memory
utilization low.Anyhow, I would like to take a peek at your
code. If you don't mind,just tar the directory and attach to a
personal email.Thanks,MikeFrank Silbermann wrote:
Several months ago I mentioned that I was developing classes based on
WicketExtensions' DataTable and SortableDataProvider to display
arbitrary SQL SELECT result sets, with arbitrary sorting capability
built-in. My approach is only appropriate for small result
sets or for prototyping, as the ResultSet's data is kept in the data
provider between page
renderings:
* The developer overrides the
method that generates the SQL
query string.If the
generated text varies from one postback to the
next (or if an event sets a
special flag), the data is
replacedby a new query to the
database.
* A general routine handles
sorting events (column-header
clicks)by delegating to column
type's default comparator and the
built-in ArrayList sorting
capability.
* A hook is provided where the
developer can specify massaging of
the data between download and presentation, e.g. to compute
and add a summary row, to insert
additional computed columns, or to
replace date or number objects by formatted strings
(tobypass DataTable's default
rendering of these objects). (Perhaps someone can adapt some
of my ideas to a more general solution that doesn't keep
result-set data in the DataProvider between
postbacks.) My implementation consists of just a few hundred
lines of code in four classes, two of which are trivial
javabeans.A few readers of this group expressed interest;
what would be the easiest way of sharing?I suppose I
could build a tiny jar file and attach it to an e-mail, but it might
be easier to discuss the implementation if I send a few e-mails, each
directly containing the source code for one or two
classes.Would that be an appropriate use of this mailing
list?-Using
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[Wicket-user] Panel visibility
I'm using Wicket 1.2, and I've included on my page a subclass of Panel. In response to an event, I called "myPanel.setVisible(false)" but the panel remains visible. Is this a known bug, or do I need to do something to implement "void setVisible(boolean)" in my subclass? Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Panel visibility
I did not modify the client header, but I don't think it's a caching issue, because other widgets are changing as expected on postback. I modified my program in a way that should not have made a difference, and it seems to work now. Perhaps I had some sort of programming error that's now gone. Oh, well. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Juergen Donnerstag Sent: Friday, July 07, 2006 2:28 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Panel visibility Are you sure it not a caching issue? Your browser caching the page? Did you modify the response header to disable client caching? Juergen On 7/7/06, Frank Silbermann [EMAIL PROTECTED] wrote: I'm using Wicket 1.2, and I've included on my page a subclass of Panel. In response to an event, I called myPanel.setVisible(false) but the panel remains visible. Is this a known bug, or do I need to do something to implement void setVisible(boolean) in my subclass? Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=1216 42 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Is it possible to embed jsp in wicket ?
I don't see why it would be any harder than embedding JSP in an ASP.NET page (or vice-versa). From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ingram ChenSent: Wednesday, June 28, 2006 11:58 AMTo: wicket-user@lists.sourceforge.netSubject: [Wicket-user] Is it possible to embed jsp in wicket ? We want to merge wicket into exist struts project and there are some parts of system still requires jsp. Could I include jsp (output of jsp) in wicket page ? Any suggestion are welcome ! Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] Wicket fundamentals
I find
that I like using Wicket very much, but there are some aspects which I found
quite strange at first that may confuse and put off new users unless the
textbooks being written can motivate the Wicket way of doing things. One
stumbling block for me was the requirement that the Wicket:id be known at the
time of a component's construction.
For
example, suppose my application is based on a template with a
Wicket:idmarking the place whereI insert a Panel that differs page
by page. On some pages I want to place there two existing panels side by
side in that spot -- not the same two panels every time, butvarious pairs
of panels on each page. It seems silly to create a different Panel class
for each different pair of panels I might want to display; it makes more sense
is to create a Panel object that displays any two arbitrary sub-panels
side-by-side -- call it HorizontalPanels_panel..
I
think most Java programmers would expect that this class might have a
constructor that takes two Panel objects as input. Or, perhaps, it might
contain methods that would allow a user to assign component panels to the
object. Neither is the Wicket way. You see, in order to display two
panels side-by-side the HorizontalPanels_panel requires HTML that contains the
Wicket:id for each sub-panel.When writing HorizontalPanels_panel I
can choose whatever values I please for thoseWicket:id's, but these values
must be known by whoever constructs the component panels-- a low-level
implementation detail that should not concern them.
To
avoid burdening users of this class with the need to remember such arbitrary,
low-level HorizontalPanels_panel implementation details,instead of
accepting the sub-panel's as constuctor or method arguments I make my
HorizontalPanels_panel class abstract, with abstract methods that build the
sub-panels (to be implemented by the user) which take the Wicket:id as an input
argument:
public
class HorizontalPanels_panel {
public HorizontalPanels_panel(String parentPanelWicketId) throws Exception
{
...create a component container using
parentPanelWicketId...
...call the abstract methods
createLeftPanel(wicketId1) and
createRightPanel(wicketId2)...
...add to the component container the panels
returned by these
abstract
methods...
}
abstract public Panel createLeftPanel(String wicketId) throws
Exception;
abstract public Panel createRightPanel(String wicketId) throws
Exception;
}
Anywhere in the application where I need to create a Panel displaying two
sub-panels side-by-side I simply instantiate an anonymous subclass of
HorizontalPanels_panel that implements the methods creating the
sub-panels.
This
approach works, and seems to be the Wicket way of doing things. A similar
approach is taken with ListView -- the user cannot provide the ListView with a
list of components to display, rather, the user must createa sub-class of
ListView that implements a methodto create each component in the list
(based on a list of data sets, one set for each component to be
constructed). Here again, the abstract method provides the Wicket:id for
each list component being contructed.
I must
confess that this approach was far from intuitive to me; in fact it seemed quite
weird. It would have been much more intuitive if I could have accepted the
input components as arguments, and then let the HorizontalPanel_panel set their
id's to match the Wicket:id's in the HTML. Apparently, there must be some
crucial reasons based on the way Wicket works that would make this abad
idea. This is one of the issues that I hope the coming textbooks
explain.
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Re: [Wicket-user] Multipleforms good idea?
I don't think HTML forms can be nested. This will hinder re-use of components that contain their own forms. My solution is to build components with their own submit buttons with behavior built in, but which rely on being placed inside a form that covers the page as a whole. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Nino WaelSent: Friday, June 23, 2006 2:48 AMTo: wicket-user@lists.sourceforge.netSubject: [Wicket-user] Multipleforms good idea? Hi Ive been creating some different components with wicket, so that I can reuse them. On some of my pages there is stuff which does not encourage reuse. All my components have their own form, none of them have regular submit buttons. This is handled in another component, which also handles what is next and previous page. So I wanted to hear what you have to say about this approach? Some of the pros are: Dont have to worry about placing the component tags within a form since they bring their own. Might have some advantage in case of sub updating the page(ajax?)? Cons: How does this affect updating the model of separate forms when one forms submit button are clicked. Not sure how multiple forms perform versus single form. Regards Nino Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Is Wicket ok for DDA web applications?
Wicket's markup is clear and intuitive for people with web skills, but a Wicket application's presentation logic is written in Java, not mark-up. Someone with weak understanding of object-oriented design and programming (e.g., someone whose web skills are based on tools like ASP/VB-6 or Cold Fusion) will not be able to make the best use of the Wicket approach, and may even have trouble learning the framework. It may get easier for such people to learn Wicket when textbooks reach the market, but for now I occasionally had to resort to reading the object-oriented Wicket implementation code. (For example, my problem required me to subclass DataTable. To figure out how to do this I had to study the code behind DefaultDataTable -- a wicket-provided subclass that didn't solve my problem, but whose implementation illustrated the kinds of things I needed to do in my own subclass). If you can use Wicket, I'd recommend doing so. Compared with the ASP.NET application I'm rewriting, my code-base is about one-fourth the size (mainly because Wicket made it much easier to abstract fragments of presentation logic, appearing with minor variations on page after page, into my own reusable components). The tag-files generated by ASP.NET were huge compared to the little ones I had to write with Wicket, though to be fair, I had to write my tag files whereas the ASP.NET tagfiles were generated by the IDE. On the other hand, I didn't have to keep drag-dropping the same patterns of components onto page after page as did the ASP.NET developer. (I imagine that JSF programming is very similar to ASP.NET programming -- but without the benefit of so powerful an IDE.) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andrew Bate Sent: Thursday, June 22, 2006 9:47 AM To: wicket-user@lists.sourceforge.net Subject: [Wicket-user] Is Wicket ok for DDA web applications? Hi, I'm considering looking at Wicket after a painful two weeks on JSF (actually Apache MyFaces) and thinking there has to be a better way...!. Most of my work over the last 5 years has been JSP/Struts etc... I'm a J2EE developer but coming firmly from the web side rather than a back-end developmer. I want to use a framework that has clean markup and is intuitive for people with web skills. (Anyone who has seen the ghastly JSF tabular layouts and poor Tomahawk div implementation will understand!) I am about to start work on a webapp where one of the requirements is for a DDA compliant interface. If I were to use Wicket, does it have any reliance on Javascript or anything else that may jeopardise a DDA interface? Thanks, Andrew Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] tracking website usage
If all the pages in my Wicket application extend a common base page, what are some of the ways I could keep track of the each pages popularity? Im thinking of something I could put on the base page that, upon construction, would identify the actual subclass being constructed and add it to that class counter in persistent storage. Have any of you done something like this? If so, how did you architect that capability?
RE: [Wicket-user] tracking website usage
Probably only in contruction. I want to know how often users are using various pages, and not the number of operations they perform on each one. (In other words, the question is, How important is this page to the users? rather than How much impact does this page have on the performance of my website?) So I guess the page constructor is the right place for it. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Johan Compagner Sent: Thursday, May 18, 2006 10:55 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] tracking website usage storing the getClass() and a counter looks to me like the best thing to do. Except is in construction only what you want or when the page is used (rendered) johan On 5/18/06, Frank Silbermann [EMAIL PROTECTED] wrote: If all the pages in my Wicket application extend a common base page, what are some of the ways I could keep track of the each page's popularity? I'm thinking of something I could put on the base page that, upon construction, would identify the actual subclass being constructed and add it to that class' counter in persistent storage. Have any of you done something like this? If so, how did you architect that capability?
RE: [Wicket-user] Google Web Toolkit integration ?
I, personally, don't care for HTML, and perhaps I might enjoy programming in Echo2 better. But suppose an employer maintained an HTML fragment with links to their entire portfolio of web applications, and wanted this fragment to appear on every page of each web application. Since someone else is maintaining that scrap and keeping it up-to-date, I would not want to translate it into Echo 2 and maintain my own copy. Would it not likely be easier to incorporate such an HTML scrap into a Wicket application, versus one written in a framework such as Echo 2 that abstracted away the HTML completely? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Eelco Hillenius Sent: Wednesday, May 17, 2006 10:58 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Google Web Toolkit integration ? It's certainly an intriguing idea (have a look at haxe.org if you find it interesting), ... ... Yeah. I see some advantages of using layout managers - basically the same promise as Swing has - but currently I would still prefer using HTML for layout. If I would like the GWT way of developing applications, I would have choosen Echo 2 a long time ago. GWT looks like a next gen Echo to me, though with a very big name behind it, and some cool innovations. ... Eelco --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid0709bid3057dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: [Wicket-user] Google Web Toolkit integration ?
I think it would have been a good thing if the web had begun this way. After all, builders of retail-quality fat-client software products have always been able to use non-programming professional designers (when they were willing to pay for them). There's no need for graphic artists to contribute actual code. But the way things have developed, we're going to have to integrate HTML-based components from time to time. It's sort of like the reason serious programmers for so long had to use C or C++ instead of Pascal. It takes a lot of trial and error to develop a framework which, like Java, is so complete that access to the lower levels is unnecessary for most users. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Vincent Jenks Sent: Wednesday, May 17, 2006 4:53 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Google Web Toolkit integration ? You see Igorwe're not so different...you and I. I agree...and simply because we're building web applications we're likely to be working with web designers and web developers who are well versed in markup CSS and are able to take part of the application maintenance upon themselves. Using a pure-code framework can put a lot of design layout work on the developer and help to reduce the division of labor...which isn't necessarily a good thing. On 5/17/06, Igor Vaynberg [EMAIL PROTECTED] wrote: allow myself to quote...myself || imho, html is the best layout manager out there for browser apps. add css to the mix and you have a great skin manager as well. i never said css was great for layout manager :) and yes the box model is broken. -Igor On 5/17/06, Johan Compagner [EMAIL PROTECTED] wrote: ha! and css is easier then layout manager in java... hmm that is not how i see it. CSS is just plain horrible stupid box thing.. And what is a layout manager in css? There isn't one everything is sort of absoluut positioned and then you can do in swing also (not recommended ofcourse) johan On 5/17/06, Igor Vaynberg [EMAIL PROTECTED] wrote: imho, html is the best layout manager out there for browser apps. add css to the mix and you have a great skin manager as well. the one thing you always hear swing developers bitching about is how they have to fight the layout managers to get the results they want. gridbaglayout is poweful but its a huge pain to work with. matisse+grouplayout are the holy grail for swing devels, its nice and easy to create layouts. but it still requires a gui to do this, while i can do html easily by hand. also browser screen space doesnt translate easily to the desktop space. in desktop space you are pixel aware, you are also pixel aware of your fonts and the south east corner of the window. in html you have none of these things. look at wingS framework examples, they use layout managers. look how rectangular their examples look. -Igor On 5/17/06, Frank Silbermann [EMAIL PROTECTED] wrote: I, personally, don't care for HTML, and perhaps I might enjoy programming in Echo2 better. But suppose an employer maintained an HTML fragment with links to their entire portfolio of web applications, and wanted this fragment to appear on every page of each web application. Since someone else is maintaining that scrap and keeping it up-to-date, I would not want to translate it into Echo 2 and maintain my own copy. Would it not likely be easier to incorporate such an HTML scrap into a Wicket application, versus one written in a framework such as Echo 2 that abstracted away the HTML completely? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] ] On Behalf Of Eelco Hillenius Sent: Wednesday, May 17, 2006 10:58 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Google Web Toolkit integration ? It's certainly an intriguing idea (have a look at haxe.org if you find it interesting), ... ... Yeah. I see some advantages of using layout managers - basically the same promise as Swing has - but currently I would still prefer using HTML for layout. If I would like the GWT way of developing applications, I would have choosen Echo 2 a long time ago. GWT looks like a next gen Echo to me, though with a very big name behind it, and some cool innovations. ... Eelco --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmdlnkkid0709bid3057dat1642 ___ Wicket-user mailing list Wicket-user
RE: [Wicket-user] Free Maven2 book
I received an unusually low number of posts this weekend from the Wicket user group, and none today. Is the mailing list down? If not, have I been dropped from the list? --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid0709bid3057dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] Concurrent Modification Exception
I created a CheckboxData type containing a boolean (checked) and a label. I created a CheckboxDataPanel whose constructor takes a CheckboxData object, and which displays a checkbox and the label each using a PropertyModel built from the Checkbox Data object. I constructed a ListView using a ListCheckboxData, which displays a CheckboxDataPanel for each item. I have a button which removes from the ListCheckboxData every CheckboxData object whose check field is unchecked. When I click this button, I would expect the ListView would shrink perhaps down to nothing if none were checked. When I press it to remove the last remaining item, however, I get a java.util.ConcurrentModificationException.What am I doing wrong? Ive been using an ArrayList as my List implementation, but I get the same result using a Vector. Could I avoid this problem by using a CheckboxGroup instead of my own ListView?
RE: [Wicket-user] Concurrent Modification Exception -- NEVER MIND!
Never mind! The problem had nothing to do with
Wicket. My error was trying to
delete elements of the very list I was iterating:
for (CheckboxData cbd :
listToBePruned ){
if (
!cbd.isChecked() ) {
listToBePruned.remove(cbd);
}
}
A different looping strategy solved
it. /Frank
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Frank Silbermann
Sent: Tuesday, May 09, 2006 12:35 PM
To:
wicket-user@lists.sourceforge.net
Subject: [Wicket-user] Concurrent
Modification Exception
I created a CheckboxData
type containing a boolean (checked) and a label.
I created a
CheckboxDataPanel whose constructor takes a CheckboxData object, and which
displays a checkbox and the label each using a PropertyModel built from
the Checkbox Data object.
I constructed a ListView
using a ListCheckboxData, which displays a CheckboxDataPanel for each
item.
I have a button which removes from the ListCheckboxData every CheckboxData object whose check field is unchecked. When I click this button, I would expect the ListView would shrink perhaps down to nothing if none were checked. When I press it to remove the last remaining item, however, I get a java.util.ConcurrentModificationException.What am I doing wrong? Ive been using an ArrayList as my List implementation, but I get the same result using a Vector. Could I avoid this problem by using a CheckboxGroup instead of my own ListView?
RE: [Wicket-user] The other side of Wicket ...
For the last couple of months I've been building in Wicket to replace an ASP.NET application. My impression is that ASP.NET is the best thing I've ever seen for doing a one-of. Any page content that I'm going to build and use in just one page (or simply include with no modifications in a variety of places) is incredibly easy to do in ASP.NET. Wicket is far superior for situations where I need to do the same _kind_ of thing in a variety of different places, but with variations. With Wicket it is easier to build and use a component with a variety of constructors, and with methods that can be easily replaced each time I use it. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Vincent Jenks Sent: Thursday, May 04, 2006 5:49 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] The other side of Wicket ... Oh yeah, just jokes, .NET is a pretty great technology...though it still requires far more work than the EJB3+Wicket combo. MS's tools are great, they have a snazzy IDE...but I still prefer Eclipse...perhaps because of its open nature and breadth of industry support both pro amateur. The tools are also the problemyou can't rely on much else outside of MS's visual studio tools to do the job. I personally hate WYSIWYG environments and writing asp.net pages, controls, etc. w/o the editor can be quite tedious. JSF's similarity to ASP.NET is one reason I didn't want to use it...not to mention all of the strange issues I had heard of w/ JSF 1.1. .NET has it's place...but now that EJB3 is a finalized spec...I doubt it can keep up w/ Java EE 5 and beyond in a one-on-one comparison. stinfo/wicket-user --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid0709bid3057dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: [Wicket-user] auto-submit when done picking date
My problem is that Id like the textbox fed by the DatePicker to autosubmit only when the DAY part of the date changes. Since the DatePicker changes the month and year as one navigates the DatePickers pop-up, I cannot rely on submitting on just any change to the textbox. Rather than modifying the DatePicker component, a simpler solution for my use-case might be to replace my _javascript_ onChange=this.form.submit with onChange=some more complex _javascript_ that submits only if the day portion of the date differs from the initial value. But I am new to both _javascript_ and Wicket; can anyone point me to an example in which a component in a panel does something like this? Though my _javascript_ code is likely to be a few lines long, can I put it all in the attribute definition, or would I have to define a function in the HTML head, placed there using wicket:head? Also, since I am pretty new to _javascript_, does anyone have a Wicket example in which the _javascript_ references the value of an input box? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Johan Compagner Sent: Thursday, May 04, 2006 3:09 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] auto-submit when done picking date as eelco is saying. Dig into the _javascript_ of that datepicker. See how it works and if you can patch it to only set the date when you close it. the _javascript_ is not written by us. We only use it. and intergrated it into wicket. johan On 5/4/06, Frank Silbermann [EMAIL PROTECTED] wrote: Well, is there a configuration option only to change the date when a day is chosen, but not when shifting to a new month? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Eelco Hillenius Sent: Thursday, May 04, 2006 12:23 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] auto-submit when done picking date What I'd really like is to post back not when the texbox changes, but rather, when the datePicker closes.Any suggestions how?Would I need to associate the datePicker with something other than a span/ tag?On which event would I put the this.form.submit () ? I'm afraid you'll have to dig deeper in the _javascript_ part of the datepicker for this. If you find something that works, and you have an idea on how this could be integrated with the component, we'll be happy to accept a patch. Eelco --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=kkid0709bid3057dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmdlnkkid0709bid3057dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: [Wicket-user] DatePicker not work for 1.2RC3 ?
I have a different problem. Its popping up, but when I select todays date it gives me 02/05/2170 ^^ for todays date. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of smallufo Sent: Wednesday, May 03, 2006 11:20 PM To: wicket-user@lists.sourceforge.net Subject: [Wicket-user] DatePicker not work for 1.2RC3 ? Hi Anybody has problem about DatePicker on 1.2 RC3 ? It worked on 1.2 RC2 , but after I upgrade to 1.2 RC3 (both wicket and wicket-extensions) , it doesn't work , the calendar doesn't pop-up anymore... Anybody has this problem too ?
RE: [Wicket-user] DatePicker not work for 1.2RC3 ?
To be more precise, with 1.2R3 my DatePicker is now popping up a calendar for the year 2170 instead of 2006. Also, with no change in configuration it is now producing dates in the form DD/MM/ whereas before it gave me /MM/DD. I dont care which format it gives me, as long as I have stability. (I dont know how to configure the format.) But I do need it to default to the current month in the current year. The lack of a DatePicker is going to be real embarrassing to me, as I was about to turn over an early version of my application for user testing. /Frank -Original Message- From: Frank Silbermann Sent: Thursday, May 04, 2006 9:10 AM To: 'wicket-user@lists.sourceforge.net' Subject: RE: [Wicket-user] DatePicker not work for 1.2RC3 ? I have a different problem. Its popping up, but when I select todays date it gives me 02/05/2170 ^^ for todays date. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of smallufo Sent: Wednesday, May 03, 2006 11:20 PM To: wicket-user@lists.sourceforge.net Subject: [Wicket-user] DatePicker not work for 1.2RC3 ? Hi Anybody has problem about DatePicker on 1.2 RC3 ? It worked on 1.2 RC2 , but after I upgrade to 1.2 RC3 (both wicket and wicket-extensions) , it doesn't work , the calendar doesn't pop-up anymore... Anybody has this problem too ?
RE: [Wicket-user] date picker settings first day
Title: date picker settings first day
Is
there any way to prevent the DatePicker from closing when one clicks the link
to change the month? When my user wants
to change the date from, say, May 5th to April 30th, he
has to pop-up the DatePicker twice once to change the month and once to
change the day.
-Original Message-
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Lusebrink, Scott E CTR DISA GIG-CS
Sent: Thursday, May 04, 2006 9:47
AM
To:
wicket-user@lists.sourceforge.net
Subject: [Wicket-user] date picker
settings first day
the datepickersettings.setFirstDate does not
work. this is due to a typo in the DatePickerSettings.toString
if (getFirstDay() != 0)
{
b.append(\n\tfistDay : ).append(getFirstDay()).append(,);
}
this should read firstDay :
also considering that the default for the date picker is to have monday (1) as
default the if statement does not allow you to set sunday as the first
day. I suggest changing the _javascript_ to have sunday as the first day by
default otherwise change the if to != 1
I hope this can be fixed soon
Scott
RE: [Wicket-user] DatePicker not work for 1.2RC3 ?
Apparently, my initial value in the old default value is confusing the DatePicker; if I reformat my initial value the DatePicker pops up the correct year and month. Since the default format apparently changed, it may not be safe for me to rely on it. What ifformat string, and how do I use it to control the DatePickers format? I dont see it used in the FormInput example: label wicket:id=dateLabel for="" class=SpellE>datePropertyDate/label input wicket:id=dateProperty id=dateProperty type=text size=40/ span wicket:id=datePicker/span /Frank -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Johan Compagner Sent: Thursday, May 04, 2006 10:30 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DatePicker not work for 1.2RC3 ? what is the ifformat string that is embedded in youre html file for that datepicker?? And what does it say at first in the field itself? how is it formatted then? johan On 5/4/06, Frank Silbermann [EMAIL PROTECTED] wrote: I have a different problem. It's popping up, but when I select today's date it gives me 02/05/2170 ^^ for today's date. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of smallufo Sent: Wednesday, May 03, 2006 11:20 PM To: wicket-user@lists.sourceforge.net Subject: [Wicket-user] DatePicker not work for 1.2RC3 ? Hi Anybody has problem about DatePicker on 1.2 RC3 ? It worked on 1.2 RC2 , but after I upgrade to 1.2 RC3 (both wicket and wicket-extensions) , it doesn't work , the calendar doesn't pop-up anymore... Anybody has this problem too ?
RE: [Wicket-user] auto-submit when done picking date
Apparently, when you click the datePickers link to change the month, it writes the
change immediately to the associated textbox. Since I have auto-postback
_javascript_ on that input field, the postback is
causing my datePicker to disappear, and the form to
be submitted before the day of the month can be changed:
input wicket:id=dateProperty type=text
size=10 readonly
class=SpellE>this.form.submit()/
span wicket:id=datePicker/span
What Id really like is to post back
not when the texbox changes, but rather, when the datePicker closes.
Any suggestions how? Would I
need to associate the datePicker with something other
than a span/ tag? On which
event would I put the this.form.submit()
?
-Original Message-
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Johan Compagner
Sent: Thursday, May 04, 2006 10:40 AM
To:
wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user] date
picker settings first day
it doesn't close at my place.
I tested this in IE en FF
i can press it quicly once so that it jumps one month at a time or hold it and
scroll to the month i want and the release to select it.
And then the datepicker still doesn't go away.
johan
On 5/4/06, Frank Silbermann [EMAIL PROTECTED]
wrote:
Is there any way to
prevent the DatePicker from closing when one clicks the link to change the
month? When my user wants to change the date from, say, May 5th
to April 30th, he has to pop-up the DatePicker twice once to
change the month and once to change the day.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]
On Behalf Of Lusebrink, Scott E
CTR DISA GIG-CS
Sent: Thursday, May 04, 2006 9:47
AM
To: wicket-user@lists.sourceforge.net
Subject: [Wicket-user] date picker
settings first day
the datepickersettings.setFirstDate does not
work. this is due to a typo in the DatePickerSettings.toString
if (getFirstDay() != 0)
{
b.append(\n\tfistDay : ).append(getFirstDay()).append(,);
}
this should read firstDay :
also considering that the default for the date picker is to have monday (1) as
default the if statement does not allow you to set sunday as the first
day. I suggest changing the _javascript_ to have sunday as the first day by
default otherwise change the if to != 1
I hope this can be fixed soon
Scott
RE: [Wicket-user] auto-submit when done picking date
Well, is there a configuration option only to change the date when a day is chosen, but not when shifting to a new month? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Eelco Hillenius Sent: Thursday, May 04, 2006 12:23 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] auto-submit when done picking date What I'd really like is to post back not when the texbox changes, but rather, when the datePicker closes. Any suggestions how? Would I need to associate the datePicker with something other than a span/ tag? On which event would I put the this.form.submit() ? I'm afraid you'll have to dig deeper in the javascript part of the datepicker for this. If you find something that works, and you have an idea on how this could be integrated with the component, we'll be happy to accept a patch. Eelco --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=kkid0709bid3057dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid0709bid3057dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: [Wicket-user] The other side of Wicket ...
My great hope is that Wicket can provide great productivity and power to people who have a true mastery of object-oriented techniques, raising their pay and status above that of ordinary code-monkeys and API-memorizers. My great fear is that the market will reject Wicket because procedurally-oriented code-monkeys won't be able to use it. :-) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Vincent Jenks Sent: Thursday, May 04, 2006 3:41 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] The other side of Wicket ... I don't hear great things about Struts! My experience w/ Java/J2EE/Java EE before wicket was Servlets+JSP+Hibernate (and JDBC), and I've only been doing Java for about a year. I had made a living off of Microsoft technologies for years prior to that, specifically C# and the .NET framework. I guess you could say I had a far worse infection than even a reformed Struts user would have had :D Seriously though, I looked at Struts and tried to walk through a few tutorials. If I can't grasp the framework, even at a very basic, high-level after doing a couple tutorials...it's probably too complex. Just glancing over the Wicket examples was enough for me to know it was something worth pursuing. On 5/4/06, Johan Compagner [EMAIL PROTECTED] wrote: and doing all of this while training a new developer who just joined the company and is not familiar w/ Java, Wicket, or even web apps development in general. lucky you!!! because they are not completely infected by the mvc (struts) way of working! Because that would be much worse :) johan --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=kkid0709bid3057dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user --- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid0709bid3057dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] GridView option?
On each page of a GridView (Wicket Extensions 1.2) the elements enter the grid in row-order, from top to bottom. Is there a way to have the DataProvider populate the grid in column-order filling one column from top to bottom before moving onto the next column to the right? If not, maybe this could be considered a feature request.
RE: [Wicket-user] DataTable formatting
The CSS attribute empty-cells: show
works in Mozilla, but not in IE 6.0 are there any work-arounds?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Nick Heudecker
Sent: Monday, April 10, 2006 4:12
PM
To:
wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user]
DataTable formatting
Have you tried the CSS attribute 'empty-cells: show;'
?
On 4/10/06, Frank Silbermann [EMAIL PROTECTED]
wrote:
To draw lines separating every cell in my DataTable I tried: table border=1 wicket:id=datatableas Igor recommended. It worked fine, except for when the IDataProvider provided either a null or an empty string for a particular cell. Then the line separators were missing. Do you think the more complex CSS approach would do better?--or even table border=1 wicket:id=datatable-IgorOn 3/31/06, Igor Vaynberg [EMAIL PROTECTED] wrote: style table.datatable td { border:0; border-bottom: 1px solid black; border-right: 1px solid black; } /style table class=datatable wicket:id=datatable . -Igor On 3/31/06, Frank Silbermann [EMAIL PROTECTED] wrote: Is there a way to make the DataTable draw a line between every row and column ? like a grid?
RE: [Wicket-user] DataTable formatting
To draw lines separating every cell in my DataTable I tried: table border=1 wicket:id=datatableas Igor recommended. It worked fine, except for when the IDataProvider provided either a null or an empty string for a particular cell. Then the line separators were missing. Do you think the more complex CSS approach would do better?--or even table border=1 wicket:id=datatable-IgorOn 3/31/06, Igor Vaynberg [EMAIL PROTECTED] wrote: style table.datatable td { border:0; border-bottom: 1px solid black; border-right: 1px solid black; } /style table class=datatable wicket:id=datatable . -Igor On 3/31/06, Frank Silbermann [EMAIL PROTECTED] wrote: Is there a way to make the DataTable draw a line between every row and column ? like a grid?
RE: [Wicket-user] DataTable formatting
Thank you!
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Nick Heudecker
Sent: Monday, April 10, 2006 4:12
PM
To:
wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user]
DataTable formatting
Have you tried the CSS attribute 'empty-cells: show;'
?
On 4/10/06, Frank Silbermann [EMAIL PROTECTED]
wrote:
To draw lines separating every cell in my DataTable I tried: table border=1 wicket:id=datatableas Igor recommended. It worked fine, except for when the IDataProvider provided either a null or an empty string for a particular cell. Then the line separators were missing. Do you think the more complex CSS approach would do better?--or even table border=1 wicket:id=datatable-IgorOn 3/31/06, Igor Vaynberg [EMAIL PROTECTED] wrote: style table.datatable td { border:0; border-bottom: 1px solid black; border-right: 1px solid black; } /style table class=datatable wicket:id=datatable . -Igor On 3/31/06, Frank Silbermann [EMAIL PROTECTED] wrote: Is there a way to make the DataTable draw a line between every row and column ? like a grid?
RE: [Wicket-user] Question about DataTable and IDataProvider restated
Me: I suppose the usual approach is to trigger the download of IDataProvider's data via the event handler of the submit button. That way, the data would be available for both Iterator IDataProvider.iterate(first, count) and int IDataProvider.size(). Eelco Hillenius Sent: Tuesday, April 04, 2006 5:58 PM: It's the responsibility of the model(s). Components may rely on models being properly initialized and available whenever they want to access them. Model implementations may or may implement detachable behavior, caching etc. Perhaps the method IModel IDataProvider.model(Object) has something to do with this. How is this method to be used? However, I do not have a single submit button - I have various sets of radio-buttons and a change to any one causes an immediate postback. I do not want to code an event handler for each one of them; I'd rather put my database query in a method that is called before the page is rendered _regardless_ of the reason. Can you suggest a suitable method? Eelco: So, make that part of your model's implementation. Look at for example LoadableDetachableModel for ideas, or you can use the implementation directly too if you want. I am guessing that the input to IModel IDataProvider.model(Object) is some object in the session that provides the information needed for the database download. Any IDataProvider method that needs database data, e.g. int count() and Iterator iterate(first,count) must call IModel IDataProvider.getModel(Object) to get the wrapper, and then ask that wrapper to provide the database-filled result. In this way, whichever IDataProvider method needs the database data first is the one that causes the database refresh. Is that the idea? --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnkkid0944bid$1720dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: [Wicket-user] ?Contract for Iterator IDataProvider.iterator(int first, int count) ???
-Original Message-
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Igor Vaynberg
Sent: Tuesday, April 04, 2006 6:32 PM
To: wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user]
?Contract for Iterator IDataProvider.iterator(int first, int count)
???
If so, I would ask _which_ framework method _should_ trigger the retrieval of database
information needed by both IDataProvider methods? If I knew which of the
two methods were called first I could put the database query
there. Or, perhaps the database query should be triggered by some other
framework method which is called before either of them.
you are meant to do two queries:
size() { return { select count(*) from blah } }
iterator(int first, int count) { return { select *
from blah where rownum=first and rownumfirst+count }}
-Igor
These
two methods could return inconsistent results if other users intervening
CRUD operations affected the number of rows returned.
So if I
want to guard against that, I should allow either one of these methods to
download the rows and count them. Each
method should do that only if the other method hasnt done it first. Is
that the idea?
RE: [Wicket-user] ?Contract for Iterator IDataProvider.iterator(int first, int count) ???
I have a question about the intended use of the DataTable components provided in Wicket Extensions. The DataTable relies upon an IDataProvider to provide the data. To do this, we implement: Iterator iterate(first, count) Lacking any advice to the contrary, I assumed that this is the method which would retrieve data from the database, but this does not seem to be working well for me. My database query is parameterized based on page-component model values, and these may change with each rendering. My problem is that when one rendering presents a short data set, on the next rendering the DataTable is not always requesting all of the rows. The count seems to be affected by the number of rows returned by the previous rendering. I suspect this is because my implementation of int DataProvider.size() assumes that it will be called _after_ Iterator iterate(first, count) pulls down the data so its always one rendering behind. Should I give the int IDataProvider.size() method the responsibility for figuring out the query string and going to the database? (How else would it be able to tell the DataProvider how many rows to request?)
RE: [Wicket-user] ?Contract for Iterator IDataProvider.iterator(int first, int count) ???
Assuming that the database query depends upon whatever page-component selections prompted the post-back, both int IDataProvider.size() and Iterator IDataProvider.iterator(first,count) require information that can only be gotten by a database query.: Therefore, for each post-back, Ill need to query the database before _either_ of these methods return. If both methods query the database independently, intervening CRUD operations may cause them to return inconsistent results (a size that is too small or too large). I can and should retrieve both the rows and their number with a single query. The question is where I should do this. My present implementation retrieves the ResultSet when iterator(first,count) is called, setting a size variable that the size() method relies upon. MY PROBLEM is that Im seeing an inconsistent number of rows displayed for the same query. It seems to depend upon how large the previous querys results were. If the value of count in Iterator IDataProvider.iterate(first,count) depends upon the results returned by int IDataProvider.size() that would explain my problem, because the value of count would have been based on obsolete information (it would be based on the previous query). I am wondering whether this is the cause of my problem. If so, I would ask _which_ framework method _should_ trigger the retrieval of database information needed by both IDataProvider methods? If I knew which of the two methods were called first I could put the database query there. Or, perhaps the database query should be triggered by some other framework method which is called before either of them. What are my options? . -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Igor Vaynberg Sent: Tuesday, April 04, 2006 3:56 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] ?Contract for Iterator IDataProvider.iterator(int first, int count) ??? the iterator() and size() are not meant to be used together and there is no, nor ever be, a contract that guarantees any ordering of invocations between these two methods. size() is meant to return the total number of rows iterator() is used to return a window that will be displayed those are the only contracts. what exactly is the problem? -Igor On 4/4/06, Frank Silbermann [EMAIL PROTECTED] wrote: I have a question about the intended use of the DataTable components provided in Wicket Extensions. The DataTable relies upon an IDataProvider to provide the data. To do this, we implement: Iterator iterate(first, count) Lacking any advice to the contrary, I assumed that this is the method which would retrieve data from the database, but this does not seem to be working well for me. My database query is parameterized based on page-component model values, and these may change with each rendering. My problem is that when one rendering presents a short data set, on the next rendering the DataTable is not always requesting all of the rows. The count seems to be affected by the number of rows returned by the previous rendering. I suspect this is because my implementation of int DataProvider.size() assumes that it will be called _after_ Iterator iterate(first, count) pulls down the data so it's always one rendering behind. Should I give the int IDataProvider.size() method the responsibility for figuring out the query string and going to the database? (How else would it be able to tell the DataProvider how many rows to request?)
RE: [Wicket-user] Question about DataTable and IDataProvider restated
I suppose the usual approach is to trigger the download of IDataProviders data via the event handler of the submit button. That way, the data would be available for both Iterator IDataProvider.iterate(first, count) and int IDataProvider.size(). However, I do not have a single submit button I have various sets of radio-buttons and a change to any one causes an immediate postback. I do not want to code an event handler for each one of them; Id rather put my database query in a method that is called before the page is rendered _regardless_ of the reason. Can you suggest a suitable method? I tried putting the database query in Iterator IDataProvider.iterate(first, count) but that doesnt seem to work, perhaps because it comes too late for int IDataProvider.size() to have the information. Putting the database query in int IDataProvider.size() may simply reverse the problem. Into which method _should_ I place the database query? What are my options? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Frank Silbermann Sent: Tuesday, April 04, 2006 3:33 PM To: wicket-user@lists.sourceforge.net Subject: RE: [Wicket-user] ?Contract for Iterator IDataProvider.iterator(int first, int count) ??? I have a question about the intended use of the DataTable components provided in Wicket Extensions. The DataTable relies upon an IDataProvider to provide the data. To do this, we implement: Iterator iterate(first, count) Lacking any advice to the contrary, I assumed that this is the method which would retrieve data from the database, but this does not seem to be working well for me. My database query is parameterized based on page-component model values, and these may change with each rendering. My problem is that when one rendering presents a short data set, on the next rendering the DataTable is not always requesting all of the rows. The count seems to be affected by the number of rows returned by the previous rendering. I suspect this is because my implementation of int DataProvider.size() assumes that it will be called _after_ Iterator iterate(first, count) pulls down the data so its always one rendering behind. Should I give the int IDataProvider.size() method the responsibility for figuring out the query string and going to the database? (How else would it be able to tell the DataProvider how many rows to request?)
RE: [Wicket-user] Wicket 1.2-beta3 is available
My application uses DataTables whose column headers come from ResultSetMetaData and whose data comes from ResultSet. With the new .jars, Im getting the column headers, but not the table contents. I clicked something and got a no such method exception. Have the DataTable extensions been re-factored since 1.2B2? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Martijn Dashorst Sent: Sunday, April 02, 2006 4:55 PM To: Wicket User; Wicket Developers Subject: [Wicket-user] Wicket 1.2-beta3 is available All, I have created and uploaded the third beta release of Wicket 1.2. We have solved quite some bugs, but there are some nasty one's still unsolved. This is why we chose to release another beta instead of moving into the end game of our 1.2 release schedule. You can monitor the bug list at sourceforge (http://sourceforge.net/tracker/?group_id=119783atid=684975) to see which are still open and which are solved. The outstanding bugs shouldn't hurt development efforts, so if you are in the process of upgrading to Wicket 1.2, please continue to do so with this release (or bake your own from SVN trunk). This release is not considered stable enough to use in production. Help us finalize this release by downloading and test driving this release. The more bugs you find now, the better the final release will be! You can download the release(s) of the different projects at the usual download location: http://sourceforge.net/project/showfiles.php?group_id=119783 This release contains the following projects: o wicket o wicket-extensions o wicket-spring o wicket-spring-annot o wicket-auth-roles o and all example projects for each release. Have fun! - the Wicket team -- Wicket 1.2 is coming! Write Ajax applications without touching _javascript_! -- http://wicketframework.org
RE: [Wicket-user] Wicket 1.2-beta3 is available
Never mind. It looks like a problem with my own incomplete re-compiles. /Frank -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Frank Silbermann Sent: Monday, April 03, 2006 2:16 PM To: wicket-user@lists.sourceforge.net Subject: RE: [Wicket-user] Wicket 1.2-beta3 is available My application uses DataTables whose column headers come from ResultSetMetaData and whose data comes from ResultSet. With the new .jars, Im getting the column headers, but not the table contents. I clicked something and got a no such method exception. Have the DataTable extensions been re-factored since 1.2B2? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Martijn Dashorst Sent: Sunday, April 02, 2006 4:55 PM To: Wicket User; Wicket Developers Subject: [Wicket-user] Wicket 1.2-beta3 is available All, I have created and uploaded the third beta release of Wicket 1.2. We have solved quite some bugs, but there are some nasty one's still unsolved. This is why we chose to release another beta instead of moving into the end game of our 1.2 release schedule. You can monitor the bug list at sourceforge (http://sourceforge.net/tracker/?group_id=119783atid=684975) to see which are still open and which are solved. The outstanding bugs shouldn't hurt development efforts, so if you are in the process of upgrading to Wicket 1.2, please continue to do so with this release (or bake your own from SVN trunk). This release is not considered stable enough to use in production. Help us finalize this release by downloading and test driving this release. The more bugs you find now, the better the final release will be! You can download the release(s) of the different projects at the usual download location: http://sourceforge.net/project/showfiles.php?group_id=119783 This release contains the following projects: o wicket o wicket-extensions o wicket-spring o wicket-spring-annot o wicket-auth-roles o and all example projects for each release. Have fun! - the Wicket team -- Wicket 1.2 is coming! Write Ajax applications without touching _javascript_! -- http://wicketframework.org
[Wicket-user] Wicket/Tomcat configuration: Where is System.out ???
To debug an application Ive inserted a System.out.println command. Where is System.out when Im running Wicket on Tomcat? Is it captured by some special Wicket logfile (I cant find any)? It doesnt seem to be going to any of the Tomcat logfiles that I can see, nor to the console window (unless Im just missing it).\ Is this something I have to configure in Tomcat to see the output of System.out?
RE: [Wicket-user] Wicket/Tomcat configuration: Where is System.out ???
Possibility 1: What does the Wicket application have to do to pass the System.out.println() statements? Possibility 2: If its not off-topic, could someone please give me a hint what I might have done wrong in configuring Tomcat? I didnt actually configure it myself; I took the easy way out and downloaded a configured-for-development version from: http://www.coreservlets.com/Apache-Tomcat-Tutorial/ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Martijn Dashorst Sent: Friday, March 31, 2006 3:22 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Wicket/Tomcat configuration: Where is System.out ??? There are 2 possibilities: 1. the application doesn't pass the system.out.println() statements 2. you didn't configure tomcat right. usually tomcat spits out the system.out into the logs/ subdirectory, or on the console itself where it starts. if you run on linux, you'll have to redirect that output to a log file. Martijn On 3/31/06, Frank Silbermann [EMAIL PROTECTED] wrote: To debug an application I've inserted a System.out.println command. Where is System.out when I'm running Wicket on Tomcat? Is it captured by some special Wicket logfile (I can't find any)? It doesn't seem to be going to any of the Tomcat logfiles that I can see, nor to the console window (unless I'm just missing it).\ Is this something I have to configure in Tomcat to see the output of System.out?
[Wicket-user] DataTable formatting
Is there a way to make the DataTable draw a line between every row and column like a grid?
[Wicket-user] Wicket versus Echo
I was browsing some of the framework comparisons on the web and realized that though Wicket is in key ways most similar to Echo. Yet, very little has been written to contrast these two. The one difference that I can ascertain is that Wicket exposes the underlying html whereas Echo completely hides the html from the developer. What are some of the implications of this difference that would make Wicket better than Echo? (I dislike html, so thats a point for Echo, but maybe access to the html is sometimes necessary which would be a point for Wicket). What other differences are there?
RE: [Wicket-user] Location of image files
I wanted a panel constructed with an image
filename which would popup the image in another window. I wanted my code in one place, my static
image files stored in the WEB-INF folder of my web module, and couldnt
figure out how to make Image component find them. Igor replied:
If they live outside a jar in a
static location then why do you even need an Image component? Add a webmarkup
container with an attribute modifier that rewrites the src
attri to point at an image, and attach that to img markup.
What Igor
suggested is exactly what I want to do, but Im having trouble changing
the src attribute on my image display
page. My HTML for the pop-up panel
is:
html xmlns=http://www.w3.org/1999/xhtml xmlns:wicket=http://wicket.sourceforge.net/ xml:lang=en lang=en
head/head
body
img wicket:id = picture alt=Picture src=REPLACE_THIS.png/
/body
/html
My code is:
public class PicturePage extends WebPage {
public PicturePage( PageParameters pageParameters ) {
String pictureFile
= pageParameters.getString(pictureFile);
WebMarkupContainer
wmc = new WebMarkupContainer(picture);
wmc.add( new AttributeModifier( src,
new Model(pictureFile) ) );
add(
wmc );
}
}
But it is not changing my src attribute.
What am I doing wrong?
RE: [Wicket-user] Location of image files
But my src attribute to be
modified _is_ in my HTML, as you
can see (value shown is REPLACE_THIS.png). The problem is that the existing src
attributes value was not replaced.
What do I need to do differently?
-Original Message-
From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Igor Vaynberg
Sent: Tuesday, March 28, 2006
11:56 AM
To:
wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user]
Location of image files
attribute modifiers do
not add attributes into your markup by default - they only modify the ones
thats there, if you want to add an attribute you need to add another
constructor argument:
new AttributeModifier( src, /true/, new Model(pictureFile) )
also you cannot link to resources under WEB-INF so your static folder will have
to be higher then that.
-Igor
On 3/28/06, Frank Silbermann [EMAIL PROTECTED]
wrote:
I wanted a panel
constructed with an image filename which would popup the image in another
window. I wanted my code in one place, my static image files stored in
the WEB-INF folder of my web module, and couldn't figure out how to make Image
component find them. Igor replied:
If they live
outside a jar in a static location then why do you even need an Image
component? Add a webmarkup container with an attribute modifier that
rewrites the src attri to point at an image, and attach that to img
markup.
What Igor suggested is exactly what I want
to do, but I'm having trouble changing the src attribute on my
image display page. My HTML for the pop-up panel is:
html xmlns= http://www.w3.org/1999/xhtml
xmlns:wicket=http://wicket.sourceforge.net/
xml:lang=en lang=en
head/head
body
img wicket:id = picture alt=Picture
src="">
/body
/html
My code is:
public class PicturePage
extends WebPage {
public
PicturePage( PageParameters pageParameters ) {
String
pictureFile = pageParameters.getString(pictureFile);
WebMarkupContainer wmc = new WebMarkupContainer(picture);
wmc.add( new AttributeModifier( src, new Model(pictureFile)
) );
add(
wmc );
}
}
But it is not changing my
src attribute. What am I doing wrong?
RE: [Wicket-user] Location of image files
-Original Message-
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Igor Vaynberg
Sent: Tuesday, March 28, 2006 12:46 PM
To:
wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user]
Location of image files
it should work, what does the finished output look
like. btw for tag w/out body you should use WebComponent not
WebMarkupContainer.
-Igor
OK, I start with a class called PicturePage with the following HTML. Note that there is a src
attribute hardcoded to BagsPosition.png
for the sake of previewing:
html xmlns=http://www.w3.org/1999/xhtml
xmlns:wicket=http://wicket.sourceforge.net/
xml:lang=en lang=en
head
link rel=stylesheet
type=text/css href=style.css/
/head
body
img wicket:id = picture alt=Picture src=BagsPosition.png/
/body
/html
My PicturePage
class with the changes youve suggested is:
package common.components.pictures;
import wicket.markup.html.WebPage;
import wicket.PageParameters;
import wicket.AttributeModifier;
import wicket.model.Model;
import wicket.markup.html.WebComponent;
public class PicturePage extends WebPage {
public PicturePage( PageParameters pageParameters ) {
String pictureFile
= pageParameters.getString(pictureFile);
WebComponent
wmc = new WebComponent(picture);
wmc.add( new AttributeModifier( src,
true, new Model(pictureFile) ) );
add( wmc );
}
}
My test-page with two links, each of which
should cause an image to pop-up was rendered by Wicket as:
html xmlns=http://www.w3.org/1999/xhtml xmlns:wicket=http://wicket.sourceforge.net/ xml:lang=en lang=enhead link rel=stylesheet type=text/css href=style.css//headbody span wicket:id=link1wicket:panel a href=/SpssWebModule/commonTest?wicket:bookmarkablePage=popupPageMap:common.components.pictures.PicturePageamp;filename=PrimaryChutes.png wicket:id=popupLink onclick=window.open(href, '', 'scrollbars=yes,location=no,menuBar=no,resizable=yes,status=no,toolbar=no,width=1000,height=500'); return false; span wicket:id=popupTextPrimary Chutes/span /a /wicket:panel/span br / span wicket:id=link2wicket:panel a href=/SpssWebModule/commonTest?wicket:bookmarkablePage=popupPageMap:common.components.pictures.PicturePageamp;filename=Secondary.png wicket:id=popupLink onclick=window.open(href, '', 'scrollbars=yes,location=no,menuBar=no,resizable=yes,status=no,toolbar=no,width=1000,height=500'); return false; span wicket:id=popupTextSecondary/span /a /wicket:panel/span/body/html
Note that the page parameters seem to be
set correctly to two different image files (PrimaryChutes.png and Secondary.png). Clicking on the first one yields the
original hardcoded default picture (BagsPosition.png). When I view page source I get:
html xmlns=http://www.w3.org/1999/xhtml xmlns:wicket=http://wicket.sourceforge.net/ xml:lang=en lang=enhead link rel=stylesheet type=text/css href=style.css//headbody img wicket:id=picture src=BagsPosition.png alt=Picture//body/html
Note that my src
attribute was not replaced. In
fact, it appears as if nothing at all has been done to the HTML file upon which
PicturePage is based.
RE: [Wicket-user] Location of image files
Ah, I think I see. It looks like a disagreement over the name of
the page parameter filename versus pictureFile.
Rather than setting the parameter to null,
it leaves it as it was. Thanks!
-Original Message-
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Frank Silbermann
Sent: Tuesday, March 28, 2006 1:08 PM
To:
wicket-user@lists.sourceforge.net
Subject: RE: [Wicket-user]
Location of image files
-Original Message-
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Igor Vaynberg
Sent: Tuesday, March 28, 2006 12:46 PM
To: wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user]
Location of image files
it should work, what does the finished output look
like. btw for tag w/out body you should use WebComponent not
WebMarkupContainer.
-Igor
OK, I start
with a class called PicturePage with the following HTML. Note that there is a src attribute hardcoded
to BagsPosition.png for the sake of previewing:
html
xmlns=http://www.w3.org/1999/xhtml
xmlns:wicket=http://wicket.sourceforge.net/ xml:lang=en
lang=en
head
link rel=stylesheet
type=text/css href="">
/head
body
img wicket:id =
picture alt=Picture
src="">
/body
/html
My PicturePage class with
the changes youve suggested is:
package
common.components.pictures;
import
wicket.markup.html.WebPage;
import
wicket.PageParameters;
import
wicket.AttributeModifier;
import
wicket.model.Model;
import
wicket.markup.html.WebComponent;
public class PicturePage
extends WebPage {
public PicturePage( PageParameters
pageParameters ) {
String pictureFile =
pageParameters.getString(pictureFile);
WebComponent wmc = new
WebComponent(picture);
wmc.add( new AttributeModifier(
src, true, new Model(pictureFile) )
);
add( wmc );
}
}
My test-page with two
links, each of which should cause an image to pop-up was rendered by Wicket as:
html xmlns=http://www.w3.org/1999/xhtml xmlns:wicket=http://wicket.sourceforge.net/ xml:lang=en lang=enhead link rel=stylesheet type=text/css href=style.css//headbody span wicket:id=link1wicket:panel a href=/SpssWebModule/commonTest?wicket:bookmarkablePage=popupPageMap:common.components.pictures.PicturePageamp;filename=PrimaryChutes.png wicket:id=popupLink onclick=window.open(href, '', 'scrollbars=yes,location=no,menuBar=no,resizable=yes,status=no,toolbar=no,width=1000,height=500'); return false; span wicket:id=popupTextPrimary Chutes/span /a /wicket:panel/span br / span wicket:id=link2wicket:panel a href=/SpssWebModule/commonTest?wicket:bookmarkablePage=popupPageMap:common.components.pictures.PicturePageamp;filename=Secondary.png wicket:id=popupLink onclick=window.open(href, '', 'scrollbars=yes,location=no,menuBar=no,resizable=yes,status=no,toolbar=no,width=1000,height=500'); return false; span wicket:id=popupTextSecondary/span /a /wicket:panel/span/body/html
Note that the page parameters seem to be set correctly to two
different image files (PrimaryChutes.png
and Secondary.png).
Clicking on the first one yields the original hardcoded default picture
(BagsPosition.png). When I
view page source I get:
html xmlns=http://www.w3.org/1999/xhtml xmlns:wicket=http://wicket.sourceforge.net/ xml:lang=en lang=enhead link rel=stylesheet type=text/css href=style.css//headbody img wicket:id=picture src=BagsPosition.png alt=Picture//body/html
Note that my src attribute was not replaced. In fact, it appears as if nothing at all has
been done to the HTML file upon which PicturePage is based.
[Wicket-user] Need session subclass example
I understand that the Wicket way to store data in the session is to subclass WicketSession and override getSessionFactory() in the application object. Im having trouble making it work Im getting a class cast exception where I try to retrieve my session subclass. Would someone please point me to a good example program which subclasses WicketSession?
[Wicket-user] DataTable and IDataProvider question
I am working with a database that is kind of strange. Someone provides a new table with each days data. Thus, the database can cause an SQLException as a normal result for the use case where the user requests data that hasnt been produced yet. When my Iterator IDataprovider.iterate(int first, int count) method is called and I go to the database, I would like to handle the SQLException to call void Component.setResponsePage( Class.responsePage) to tell the user what has happened, passing in PageParameters to enable the user to continue. It seems that DataTable does not like me jumping out of the iterate(first,count) method like that. It tries to set the ResponsePage to the Wicket error page, which causes a serious failure saying that one cannot set the ResponsePage twice. What are my options for solving this problem? Is it simply a matter of making my iterate(first,count) return an empty iterator to satisfy the DataTable caller before my setResponsePage() can take effect? Here is the relevant section from the Tomcat logfile: Mar 24, 2006 8:11:03 AM org.apache.catalina.core.ApplicationContext log INFO: org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]] Mar 24, 2006 8:11:03 AM org.apache.catalina.core.ApplicationContext log INFO: ContextListener: contextInitialized() Mar 24, 2006 8:11:03 AM org.apache.catalina.core.ApplicationContext log INFO: SessionListener: contextInitialized() Mar 24, 2006 8:11:10 AM org.apache.catalina.core.ApplicationContext log INFO: ContextListener: contextInitialized() Mar 24, 2006 8:11:10 AM org.apache.catalina.core.ApplicationContext log INFO: SessionListener: contextInitialized() Mar 24, 2006 8:11:20 AM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet MEM_Application threw exception wicket.WicketRuntimeException: Internal Error: Could not render error page class wicket.markup.html.pages.InternalErrorPage at wicket.request.compound.DefaultExceptionResponseStrategy.respond(DefaultExceptionResponseStrategy.java:106) at wicket.request.compound.AbstractCompoundRequestCycleProcessor.respond(AbstractCompoundRequestCycleProcessor.java:76) at wicket.RequestCycle.step(RequestCycle.java:971) at wicket.RequestCycle.steps(RequestCycle.java:1005) at wicket.RequestCycle.request(RequestCycle.java:451) at wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:212) at wicket.protocol.http.WicketServlet.doPost(WicketServlet.java:250) at javax.servlet.http.HttpServlet.service(HttpServlet.java:709) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) Caused by: wicket.WicketRuntimeException: Already redirecting to '/MEMSpssWebModule/mem?wicket:interface=:0:1:'. Cannot redirect more than once at wicket.protocol.http.BufferedWebResponse.redirect(BufferedWebResponse.java:88) at wicket.protocol.http.WebRequestCycle.redirectTo(WebRequestCycle.java:205) at wicket.request.target.component.PageRequestTarget.respond(PageRequestTarget.java:60) at wicket.request.compound.DefaultResponseStrategy.respond(DefaultResponseStrategy.java:49) at wicket.request.compound.AbstractCompoundRequestCycleProcessor.respond(AbstractCompoundRequestCycleProcessor.java:66) at wicket.RequestCycle.respond(RequestCycle.java:877) at wicket.RequestCycle.step(RequestCycle.java:946) ... 20 more Mar 24,
RE: [Wicket-user] DataTable and IDataProvider question
Are we not expected to go to the database when the iterate(first, count) method is called? Thats when the database tells me (through an SQLException) that the table hasnt been created yet. I am beginning to wonder about assumed invariants that I did not take into consideration in my current design. When the user changes some query parameters, then the next page refresh should replace the data in the table based on the new query. Ive assumed that I can handle this merely by changing the results returned by IDataprovider.iterate(first, count), but now Im beginning to wonder. A change in the query changes the result of IDataProvider.size(). If DataTable does not deal will with changing data sizes, maybe I have to respond to a change in SQL query at a higher level not merely to have the IDataProvider reflect the changes, but to replace the whole table. What do you think? Anyway, here is the result I got. Do you need the log file? (Or do I just need to back up and realize that the DataTable is not quite as flexible as Id assumed.) type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception wicket.WicketRuntimeException: Internal Error: Could not render error page class wicket.markup.html.pages.InternalErrorPage wicket.request.compound.DefaultExceptionResponseStrategy.respond(DefaultExceptionResponseStrategy.java:106) wicket.request.compound.AbstractCompoundRequestCycleProcessor.respond(AbstractCompoundRequestCycleProcessor.java:76) wicket.RequestCycle.step(RequestCycle.java:971) wicket.RequestCycle.steps(RequestCycle.java:1005) wicket.RequestCycle.request(RequestCycle.java:451) wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:212) wicket.protocol.http.WicketServlet.doPost(WicketServlet.java:250) javax.servlet.http.HttpServlet.service(HttpServlet.java:709) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Igor Vaynberg Sent: Friday, March 24, 2006 11:06 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DataTable and IDataProvider question how did it crash? what was the output? another thing is cant you try this before the datatable is even rendering? why do the check so late in the game? -Igor On 3/24/06, Frank Silbermann [EMAIL PROTECTED] wrote: I'm using 1.2 B2 -Original Message- From: [EMAIL PROTECTED] [mailto: [EMAIL PROTECTED]] On Behalf Of Igor Vaynberg Sent: Friday, March 24, 2006 10:41 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DataTable and IDataProvider question request cycle. are you using 1.2 head? -Igor On 3/24/06, Frank Silbermann [EMAIL PROTECTED] wrote: I did that, and it crashed. Who is supposed to catch the RestartResponseException to restart the response? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Igor Vaynberg Sent: Friday, March 24, 2006 10:13 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DataTable and IDataProvider question try throwing RestartResponseException. -Igor On 3/24/06, Frank Silbermann [EMAIL PROTECTED] wrote: I am working with a database that is kind of strange. Someone provides a new table with each day's data. Thus, the database can cause an SQLException as a normal result for the use case where the user requests data that hasn't been produced yet. When my Iterator IDataprovider.iterate(int first, int count) method is called and I go to the database, I would like to handle the SQLException to call void Component.setResponsePage( Class.responsePage) to tell the user what has happened, passing in PageParameters to enable the user to continue. It seems that DataTable does not like me jumping out of the iterate(first,count) method like that. It tries to set the ResponsePage to the Wicket error page, which causes a serious failure saying that one cannot set the ResponsePage twice. What are my options for solving this problem? Is it simply a matter of making my iterate(first,count) return an empty iterator to satisfy the DataTable caller before my setResponsePage() can take effect? Here is the relevant section from the Tomcat logfile: Mar 24, 2006 8:11:03 AM org.apache.catalina.core.ApplicationContext log INFO: org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http
RE: [Wicket-user] ?Contract for Iterator IDataProvider.iterator(int first, int count) ???
That suggests to me that the implementation might assume it always gets all the rows it asks for, and may raise an exception otherwise. Is that correct? If so, then any change in the number of rows between displays requires not merely that the DataTable page be reset to 1 (assuming page headers), but that the whole DataTable should be replaced for each response if the data is not static. Was that the intent? If DataTable assumes that the number of rows is static, and if the implementers assumed that in the usual case IDataProvider.iterate(first,count) would go to the database each time rather than storing data, then isnt there a danger that the total size will change while paging through the data as other users insert and delete while one traverses the DataTable pages? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Igor Vaynberg Sent: Friday, March 24, 2006 10:41 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] ?Contract for Iterator IDataProvider.iterator(int first, int count) ??? the implementation will trim to size() -Igor On 3/24/06, Frank Silbermann [EMAIL PROTECTED] wrote: To use the Wicket-extensions 1.2 DataTable, we must provide an implementation of IDataProvider. IDataProvider , in turn, requires that we implement int size() and Iterator iterator(int first, int count) If the DataTable is paging data, is it likely that count on the last page will be larger than the result determined by size() so that we must return count rows or however many remain, whichever is less -- or does the DataTable reduce count on the last page so that first + count never exceeds size()?
[Wicket-user] wicket.markup.html.form.FormComponent and wicket.markup.html.form.Form
I created a page using a DropDownChoice, overriding the void wantOnSelectionChangedNotifications() to return TRUE. I noticed that it worked, even though I neglected to embed it within an HTML form, adding it simply to the page (and not to a wicket.markup.html.form.Form). That made me think the component contains its own form. But then, it should also work if I add it to a form it is, after all, a subclass of FormComponent. Yet, the HTML specifications seem quite clearly to forbid nested forms! Why is this working? Does a Wicket FormComponent check to see whether it is contained within a form, generating its own HTML form markup only if not? Or is the ability to set page parameters and post back something that the embedded _javascript_ can perform even in the absence of an HTML form?
[Wicket-user] Keeping components mutually in sync
I have two RadioChoice components which postback immediately. Whenever onSelectionChanged() is called on one, I may need to modify the model of the other RadioChoice (thus changing its selected value). This behavior is mutual. Is it possible to get into an infinite loop of calls to onSelectionChanged()? Or is this method called only when the user changes the selection, but not when the selection is changed in code?
[Wicket-user] Examples of model decorators
Are there any examples of model decorators I could look at? I have a model that consists of one of several code values, and I would like a label to automatically display a text string associated with the code value.
RE: [Wicket-user] DataView (extentions)
The DataTable in Wicket Extensions 1.1 handles paging and sorting, but you must build a custom IDataProvider that accumulates the sorting instructions from the DataTable and provides sorted subsets of the data when requested by the DataTable (which handles the actual paging display). DataTable and supporting classes have been greatly refactored in Wicket Extensions 1.2 to give the user much more flexibility in the set of features desired. The API changes will break Wicket 1.1 programs, so if you need to subclass anything to modify its behavior, I would suggest going to Wicket 1.2 now. Otherwise, you can upgrade fairly easily at any time by replacing Wicket 1.1 DataTable with Wicket 1.2 DefaultDataTable. Wicket 1.2 DataTable is more flexible but less complete; DefaultDataTable subclasses it to provide defaults which make it behave like the Wicket 1.1 DataTable. I have come up with my own subclass of DataTable and implementation of IDataProvider to display any arbitrary database java.sql.ResultSet. The basic idea is that my IDataProvider implementation contains a List of rows, each row consisting of a List of Object. Also in the implementation is an array of descriptors, one per column, each of which contains the column name and an indicator as to whether I want to be able to sort on that column. (The column name comes from the ResultSetMetadata; a method is provided to set the sortability flag.) My implementation of the abstract method to deliver a sequence of rows will delegate to the List.sublist() command from the Java Collections API, and each time the DataTable delivers a sort criteria I apply the Collections.sort() method to my list of rows, passing it a Comparator that delegates to the Comparator of the Object at the relevant column index. My implementation of IDataProvider can also look at my array of column descriptors and generate a list of IColumn objects (needed to construct the DataTable). Its actually a bit more complicated than that (and a work in progress), because I have complicated the above mechanisms to deal with the possibility of a summary row at the end, and when rows are requested, the query string will be recalculated based on form data -- and if it has changed since the last request then the data will be refreshed from the database and the current page set back to 1. The code is actually quite compact; when Im finished Ill post it to the list if there is any interest. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Igor Vaynberg Sent: Tuesday, March 14, 2006 5:21 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DataView (extentions) there is also a DataTable component which wraps DataView+paging+sorting. -Igor On 3/14/06, Vincent Jenks [EMAIL PROTECTED] wrote: I'm using 1.1.1 Are there any plans to whittle down the amount of code it takes to implement paging sorting? Has it changed at all in 1.2? I spent a lot of time w/ ASP.NET (which wicket feels quite similar to) and there's a DataGrid component that has properties to set paging sorting w/o any extra work. Something like that would be really convenient. On 3/14/06, Igor Vaynberg [EMAIL PROTECTED] wrote: are you using 1.1 ? or 1.2 ? there used to be a constructor that took model in 1.1 i think. the model object must be of type IDataProvider. -Igor On 3/14/06, Vincent Jenks [EMAIL PROTECTED] wrote: Sorry, I didn't mention that the List is wrapped in a detached modelso it's an IModel, not List in the constructor. On 3/14/06, Igor Vaynberg [EMAIL PROTECTED] wrote: yes DataView works with IDataProvider instead of list. not sure why you didnt get a compile error since there is no (String,List) constructor. there are examples of dataview and datatable under wicket-examples/repeaters -Igor On 3/14/06, Vincent Jenks [EMAIL PROTECTED] wrote: So, I'm trying to use a DataView so I can page a collection of objects from a session bean. I create the List collection (loadingModel) and pass it into the DataView: DataView productsDataView = new DataView(productsDataView, loadingModel) ...but I'm getting an exception at runtime: Caused by: java.lang.ClassCastException: java.util.ArrayList I assume then, it's not like the ListView in that it will not take a List directly? Or, have I done something wrong? Thanks!
[Wicket-user] Location of image files
I am writing code that will be shared between two web applications. The common code will be packaged in a .jar to be included by both web applications. One common component has a requirement to display an image whose filename (or some other handle) it takes as a parameter. The images that will be passed to this component to display are different for the two web applications. Therefore, my image files must reside separately from the code which constructs the wicket.markup.html.image.Image component. The constructor for wicket.markup.html.image.Image can take a string representing the image's file name. In all of the examples, the image file exists in the same directory as the component that creates the Image component. If the image exists in some other arbitrary location, what are the rules for absolute or relative path addressing of the image filename? --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnkkid0944bid$1720dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: [Wicket-user] Location of image files
Its not that I want the images to
be served from a .jar; I just want them to exist in a different place from the
code that is creating the Image component.
Suppose I have a hundred images I want to
be able to pass as a parameter to a page or panel I have to do all this
a hundred times?
-Original Message-
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Igor Vaynberg
Sent: Tuesday, March 14, 2006
10:13 AM
To:
wicket-user@lists.sourceforge.net
Subject: Re: [Wicket-user]
Location of image files
there are two parts to this if you want the image to
be served from a jar.
one. you have to create an initializer and bind the image as a package
resource:
public void init(Application application)
{
PackageResource.bind(application,
Tree.class, blank.gif);
...
}
the Tree.class acts as a scope - the image is assumed to be in the same package
as the scope class.
the initializer is needed for clustering reasons. look at wicket.properties and
Initializer code in wicket package.
two. you must create a resource reference to your image:
/** Blank image. */
public static final ResourceReference BLANK = new
PackageResourceReference( Tree.class, blank.gif);
after this you can create a url for the image in the package like so
RequestCycle.get().urlFor(BLANK);
hope this helps,
-Igor
On 3/14/06, Frank Silbermann [EMAIL PROTECTED]
wrote:
I am writing code that will be shared between two web
applications.The
common code will be packaged in a .jar to be included by both web
applications.
One common component has a requirement to display an image whose
filename (or some other handle) it takes as a parameter.The images
that will be passed to this component to display are different for the
two web applications.Therefore, my image files must reside
separately
from the code which constructs the wicket.markup.html.image.Image
component.
The constructor for wicket.markup.html.image.Image can take a string
representing the image's file name.In all of the examples, the
image
file exists in the same directory as the component that creates the
Image component.If the image exists in some other arbitrary
location,
what are the rules for absolute or relative path addressing of the image
filename?
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[Wicket-user] Best practice for handling exceptions?
I have a DataTable (Wicket-extensions) that gets data from JDBC. My implementation of: java.util.Iterator IDataProvider.iterator(int first, int count) throws a variety of API exceptions (e.g. SQLException) which I have to catch, because the IDataProvider interface does not allow my method to throw them. There is nothing I can do to recover; I just want to do the standard default correct thing. I suppose my application should have an error page registered, and my exception handler should link to it. Would someone please point me to an example or send me some sample code demonstrating the standard Wicket way of doing this? Thank you.
[Wicket-user] Popping up a static file
What is the easiest way of creating a link that pops up a static file (e.g. a .png drawing) in a new window? The Linkomatic example shows how an arbitrary BookmarkablePageLink can be made to pop-up, but this approach would require me to construct an HTML file with a Wicket ID to hold the image, and a Wicket WebPage class to insert the image. That seems like overkill. Is there a simpler way? (I suppose I could use pure HTML, but then what relation does my .png file have to the rest of my Wicket application?) I am flexible as to where in my directory hierarchy the static .png file can reside. --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnkkid0944bid$1720dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: [Wicket-user] Rendering DataTable or DataView (or model) as Excel sheet
On 3/6/06, Frank Silbermann [EMAIL PROTECTED] wrote: From 2006/02/01: Of greater concern is that if I try to download the Excel file a second time (clicking the download button again), I get an error.If from the error page I use my browser's back button, my page returns and the download button works again -- once. In other words, I must re-request my page between each download request, or I get an error.What is actually going on here, and how do I correct this behavior?Is it because I am using a submit button instead of a Link to trigger the download?How can I change my code to avoid invalidating the page which offered the download? im not sure why this happens. i can look into it if you reproduce it in a quickstart project. -Igor Im not sure what a quickstart project is. Do you mean a zipped minimal web application that demonstrates the behavior? /Frank
RE: [Wicket-user] Rendering DataTable or DataView (or model) as Excel sheet
I tried with the 1.2beta1; same problem. /Frank -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Johan Compagner Sent: Tuesday, March 07, 2006 7:44 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Rendering DataTable or DataView (or model) as Excel sheet MarkupContainer [Component id = 1, page = No Page, path =1.MyDataTable$1]] component id == 1, DataTable? It looks like a Item in the table that was removed. Which version do you use? Because there was an error that is recently fixed that sets the parents to the right values if a markupcontainer children did get rollbacked. Can you try with 1.2beta1? johan On 3/7/06, Frank Silbermann [EMAIL PROTECTED] wrote: On 3/6/06, Frank Silbermann [EMAIL PROTECTED] wrote: From 2006/02/01: Of greater concern is that if I try to download the Excel file a second time (clicking the download button again), I get an error.If from the error page I use my browser's back button, my page returns and the download button works again -- once. In other words, I must re-request my page between each download request, or I get an error.What is actually going on here, and how do I correct this behavior?Is it because I am using a submit button instead of a Link to trigger the download?How can I change my code to avoid invalidating the page which offered the download? im not sure why this happens. i can look into it if you reproduce it in a quickstart project. -Igor I'm not sure what a quickstart project is. Do you mean a zipped minimal web application that demonstrates the behavior? /Frank Root cause: java.lang.IllegalStateException: No Page found for component [MarkupContainer [Component id = 1, page = No Page, path = 1.MyDataTable$1]] at wicket.Component.getPage(Component.java:1033) at wicket.Component.hasErrorMessage(Component.java:1246) at wicket.markup.html.form.Form$14.component(Form.java:808) at wicket.MarkupContainer.visitChildren(MarkupContainer.java:670) at wicket.MarkupContainer.visitChildren(MarkupContainer.java:685) at wicket.MarkupContainer.visitChildren(MarkupContainer.java:685) at wicket.MarkupContainer.visitChildren(MarkupContainer.java:710) at wicket.markup.html.form.Form.anyFormComponentError(Form.java:804) at wicket.markup.html.form.Form.hasError(Form.java:505) at wicket.markup.html.form.Form.process(Form.java:702) at wicket.markup.html.form.Form.onFormSubmitted(Form.java:245) at java.lang.reflect.Method.invoke(Method.java:585) at wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:162) at wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents(ListenerInterfaceRequestTarget.java:74) at wicket.request.compound.DefaultEventProcessorStrategy.processEvents(DefaultEventProcessorStrategy.java:62) at wicket.request.compound.AbstractCompoundRequestCycleProcessor.processEvents(AbstractCompoundRequestCycleProcessor.java:57) at wicket.RequestCycle.doProcessEventsAndRespond(RequestCycle.java:818) at wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:851) at wicket.RequestCycle.step(RequestCycle.java:931) at wicket.RequestCycle.steps(RequestCycle.java:1005) at wicket.RequestCycle.request(RequestCycle.java:451) at wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:208) at wicket.protocol.http.WicketServlet.doPost(WicketServlet.java:235) at javax.servlet.http.HttpServlet.service(HttpServlet.java:709) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) Complete stack: wicket.WicketRuntimeException: Method onFormSubmitted of interface wicket.markup.html.form.IFormSubmitListener targeted at component [MarkupContainer [Component id = exportToExcelForm, page
RE: [Wicket-user] Rendering DataTable or DataView (or model) as Excel sheet
From 2006/02/01:
Me:
ASP.NET has an easy way to return a DataGrid as an MSExcel file:
Dim stringwriter As New System.IO.StringWriter()
Dim htmlwriter As New System.Web.UI.HtmlTextWriter(stringwriter)
DataGrid1.RenderControl(htmlwriter)
Response.AppendHeader(content-disposition,
attachment;filename=name.xls)
Response.Write(stringwriter.ToString())
Response.End()
What is nice is that the Excel worksheet reflects the styling of the
DataGrid. ... I downloaded the Excel file produced by the ASP.NET
application, saved it, and opened it in a text editor. The content
was simply the table portion of an HTML file.
How do I do this in Wicket?
Igor Vaynberg:
In Wicket 1.2 you can do this:
DataTable dt=...;
add(new Link(export-link) {
onclick() {
getRequestCycle().setRequestTarget(new
ComponentRequestTarget(dt));
WebResponse wr=(WebResponse)getResponse();
wr.setHeader(blah);
}
}
I used a submit button in a form. To make it work I also had to set the
content-type:
protected void onSubmit() {
getRequestCycle().setRequestTarget(new
ComponentRequestTarget(dataTable));
WebResponse wr=(WebResponse)getResponse();
wr.setContentType(excel/ms-excel; name= + msExcelFilename);
wr.setHeader(content-disposition,
attachment;filename= + msExcelFilename);
}
It did not reflect the DataTable's stylesheet attributes -- this is not
a showstopper, but can I make it happen?
Of greater concern is that if I try to download the Excel file a second
time (clicking the download button again), I get an error. If from the
error page I use my browser's back button, my page returns and the
download button works again -- once.
In other words, I must re-request my page between each download request,
or I get an error. What is actually going on here, and how do I correct
this behavior? Is it because I am using a submit button instead of a
Link to trigger the download? How can I change my code to avoid
invalidating the page which offered the download?
Here is the error:
Unexpected RuntimeException
Root cause:java.lang.IllegalStateException: No Page found for component
[MarkupContainer [Component id = 1, page = No Page, path =
1.MyDataTable$1]] at wicket.Component.getPage(Component.java:1033)
at wicket.Component.hasErrorMessage(Component.java:1246) at
wicket.markup.html.form.Form$14.component(Form.java:808) at
wicket.MarkupContainer.visitChildren(MarkupContainer.java:670) at
wicket.MarkupContainer.visitChildren(MarkupContainer.java:685) at
wicket.MarkupContainer.visitChildren(MarkupContainer.java:685) at
wicket.MarkupContainer.visitChildren(MarkupContainer.java:710) at
wicket.markup.html.form.Form.anyFormComponentError(Form.java:804) at
wicket.markup.html.form.Form.hasError(Form.java:505) at
wicket.markup.html.form.Form.process(Form.java:702) at
wicket.markup.html.form.Form.onFormSubmitted(Form.java:245) at
java.lang.reflect.Method.invoke(Method.java:585) at
wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:162
) at
wicket.request.target.component.listener.ListenerInterfaceRequestTarget.
processEvents(ListenerInterfaceRequestTarget.java:74) at
wicket.request.compound.DefaultEventProcessorStrategy.processEvents(Defa
ultEventProcessorStrategy.java:62) at
wicket.request.compound.AbstractCompoundRequestCycleProcessor.processEve
nts(AbstractCompoundRequestCycleProcessor.java:57) at
wicket.RequestCycle.doProcessEventsAndRespond(RequestCycle.java:818)
at wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:851)
at wicket.RequestCycle.step(RequestCycle.java:931) at
wicket.RequestCycle.steps(RequestCycle.java:1005) at
wicket.RequestCycle.request(RequestCycle.java:451) at
wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:208) at
wicket.protocol.http.WicketServlet.doPost(WicketServlet.java:235) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:709) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:252) at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:173) at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:213) at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv
e.java:178) at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:126) at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:105) at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:107) at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1
48) at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:85
6) at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processC
RE: [Wicket-user] Replacing Page components in response to user input
Me: However, at any time the user can re-set the options and re-submit, causing a completely different DataTable based on a new DataProvider. Eelco Hillenius: First of all, ask yourself whether it is a completely different datatable, or whether the it's just a different model. Suppose it's just a different model. DataTable seems to have no constructor that takes a PropertyModel so that the IDataProvider can change dynamically, nor a method in DataTable to replace the IDataProvider manually. In this case, would you recommend simply to changing the state of my IDataProvider so that IDataProvider.iterator(first, count) method returns the new data, and call DataTable.setCurrentPage(1)? Me: How do I code a page to replace one component with a new one in response to user input? (I see plenty of examples of adding a component to a page, but only in the constructor -- and no examples of removing/replacing a component.) Eelco Hillenius: If it *is* a completely different datatable and you want to replace it with something completely different, use panels. Put your different options in different panels, and use 'replace' to replace one component with the other. Would that be the MarkupContainer.replace(component) method? This method returns a MarkupContainer -- is the return value merely self -- a convenience in case you want to replace several components in one line? I can see the motivation for putting my replaceable components in a Panel if the HTML requirements differ. Likewise, if I have enough components to replace that I'd rather not have to replace them one at a time. But if it's just a single component that I'm replacing, is there really any need to put it in its own panel? --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnkkid0944bid$1720dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: [Wicket-user] Replacing Page components in response to user input
I can see the motivation for putting my replaceable components in a Panel if the HTML requirements differ.Likewise, if I have enough components to replace that I'd rather not have to replace them one at a time.But if it's just a single component that I'm replacing, is there really any need to put it in its own panel? panel is the basic piece of wicket composition. so you will use them often. for some situation (when the panel is not really reusable outside the page) you might want to use Fragments because they make things tidier and easier. -Igor Yes, but if I have but a single span wicket:id=myDataTable in my HTML, and my Page is to replace my DataTable component with another, couldnt I do without a separate Panel _or_ Fragment? Why would I need _any_ special HTML container for my DataTable? (Or are we saying the same thing in that, in its implementation, a DataTable _is_ a Panel?)
[Wicket-user] Replacing Page components in response to user input
I have a form which provides the user with a number of options. Based on those options chosen, I will display a DataTable. The user can play with the DataTable in terms of paging through it, re-sorting the columns, and so on. However, at any time the user can re-set the options and re-submit, causing a completely different DataTable based on a new DataProvider. What tools does Wicket provide to allow me to replace one DataTable with a new one? Or, to be more general, how do I code a page to replace one component with a new one in response to user input? (I see plenty of examples of adding a component to a page, but only in the constructor -- and no examples of removing/replacing a component.) For simplity, assume that the replacement component can use the same Page mark-up, e.g. replacing one Panel with another. Putting all the possible components on the page and disabling/hiding all but one at a time is not an option for me. --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnkkid0944bid$1720dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: [Wicket-user] New snapshots available
The old DatePicker which didn't work in IE had in the documentation some sample code for using it to load a textbox. We also saw its use in the FormInput example. I know the new Calendar was just added to Wicket, and quite rapidly after the problem with the old DatePicker was identified, I might add. But could someone post a snippet of code showing how to use the new Calendar component (e.g. to set a datestring into a textbox)? Also, the concept of markup fragments (inline panels) sounds intriguing. As anyone written anything about how these are used? (Would I find much about them in a search on this mailing list, for example?) Thank you! -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Martijn Dashorst Sent: Monday, February 27, 2006 1:29 AM I have uploaded a new snapshot release for a lot of Wicket projects: ... Most notable changes to wicket: o new date picker (Yahoo), old datepicker has been deprecated o markup fragments (inline panels) ... --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnkkid0944bid$1720dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] DataTable
In Wicket-Examples, Repeaters, there's an example of a DataTable from Wicket-Extensions. The data provider supplies lists of javabeans, each bean representing a row in the table. The PropertyColumn object for each column of the table gives information about the column title, its sortability, and the non-OGNL string used for pulling a cell's data out of the bean. In this example, the column names are hardcoded as bean properties, but what I want is to display any arbitrary JDBC ResultSet in a DataTable. Has anyone written code to do that? (And if so, could I see it? ASP.NET has this feature, and I'm rewriting code that uses it.) If not, I was thinking that I could implement IDataProvider to contain information about the number and names of the columns taken from the ResultSetMetaData. The data provider would hold a list of row objects, each of which would be (or contain) an indexed sequence (an Array or ArrayList) of atomic data objects, obtained by calling resultSet.getObject(index) varying index within the column count. My subclass of DataTable would be constructed with this data provider as an argument. A loop (indexed within the column count) would create a list of PropertyColumn objects -- each with the display model based on the column name recorded from the ResultSetMetaData, and a non-OGNL property expression that makes use of List/Array indexing to access the specific field in the row. Does this sound like a good approach, or am I re-inventing the wheel here? --- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnkkid0944bid$1720dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: [Wicket-user] DatePicker won't pop up in IE
Ive done some further testing on the DatePicker popping up when running the FormInput example, and here are the results: wicket-examples-1.1.1 works in both InternetExplorer and Mozilla wicket-examples-1.2-20060221 works in Mozilla, but not InternetExplorer So the DatePickers inability to work with InternetExplorer is a bug introduced in the new version under development. I dont think my employer would accept a requirement for users to go to Mozilla, but I need the features of Wicket 1.2 -- so I hope this bug is fixed soon. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Nick Heudecker Sent: Monday, February 20, 2006 10:12 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DatePicker won't pop up I don't know what JAR versions the Forminput example is using. I've updated the priority from 5 to 7. Here's the bug: https://sourceforge.net/tracker/?func=detailatid=684975aid=1434895group_id=119783 I tried loading each of the resources the DatePicker adds to wicket:head and that worked fine. The _javascript_ added to the page, next to the text field, is what seems to be causing the problem. Another question is if the underlying date picker _javascript_ code has changed. On 2/20/06, Frank Silbermann [EMAIL PROTECTED] wrote: I've just noticed that it works for me in Mozilla. But why, then, does the FormInput example's DatePicker work for me in IE? Is there some configuration or property file setting needed to make it work in IE? Some Cascading stylesheet setting required? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Nick Heudecker Sent: Monday, February 20, 2006 11:59 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DatePicker won't pop up I'm having this problem on IE, but it works fine on FF. I've opened a bug on this issue.
[Wicket-user] question re DropDownList
In most of the component examples we use a PropertyModel so the model is automatically updated. I presume that with the DropDownList the model would be set to the selected string. What is the purpose of its void updateModel() method? Is this something to override so that instead of setting the model object to the selected string we can compute some other value (a value typically computed _using_ on the selected string? --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid3432bid#0486dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
RE: Results so far (was Re: [Wicket-user] VOTE)
I may be offering an opinion on something already decided, but it seems to me that if we change the constructors in an earlier release, and then go to Java 1.5 on a subsequent release, if that makes maintenance of two versions easier (post-1.5 and pre-1.5) easier. Advantages: (1) Less future work for the developers means faster improvement to Wicket in the long run. (2) The applications produced by users who cannot upgrade to 1.5 yet will be easier to upgrade when they finally can do so -- the obsolete user code they're accumulating won't be quite so obsolete. (3) The inconvenience of upgrading user code in two phases (for those who have no impediments to using Java 1.5 now) is a transitory problem. Of course, one could make this argument about any code-breaking change to the API, delaying the upgrade to Java 1.5 indefinitely. But I'm assuming that the constructor changes are an unusually severe break in the API. /Frank -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Eelco Hillenius Sent: Wednesday, February 22, 2006 10:15 AM To: wicket-user@lists.sourceforge.net Subject: Re: Results so far (was Re: [Wicket-user] VOTE) I agree with Johan here. I want to start discussing it on the admin list shortly. But it looks like there are enough for 2 - not the majority, but enough - to make seperate releases. We should decide on whether 1.2. (we might call that version differently actually, but that's another question) or 1.3. is going to be our long running supported version. I think the latter, and 1.2. based on requests, but we have yet to discuss that. Btw Jonathan's vote was #2 - he sent me that offline. We'll give you an update later this week or this weekend. Thanks for voting all! Eelco On 2/22/06, karthik Guru [EMAIL PROTECTED] wrote: and yeah more expected to come in :) On 2/22/06, karthik Guru [EMAIL PROTECTED] wrote: Ok for the benefit of others, the summary of vote that actually matters - . Igor - 1 Johan - 2 Eelco - 1 So , 2 votes for both at once (constructor and JDK5) 1 vote for split releases -- -- karthik -- --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmdlnkkid3432bid#0486dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=kkid3432bid#0486dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid3432bid#0486dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] JavaScript files in Wicket-Examples
In the webapp folder of Wicket Examples I noticed several _javascript_ files: effects.js prototype.js scriptaculous.js What do they do? Do I need them any of them on my project? Could these have anything to do with the fact that the Wicket-Extensions DatePicker works in the FormInput example even with InternetExplorer, but not the DatePicker in my own code?
RE: [Wicket-user] Wicket:link question
Suppose my page that displays the links is at a deeply nested level, and I want to use wicket:link to go to a page closer to the root. Would it work if I defined a Panel at the top level and put my wicket:link in there (to be included by pages that were deeply nested)? If not, what is the easiest way to hardcode a static list of many Wicket links, some of which go up the hierarchy? If the list is static and no parameters are being passed, it seems like overkill to have to write code for each link. /Frank -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Juergen Donnerstag Sent: Thursday, February 16, 2006 4:17 PM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] Wicket:link question wicket:link is realy for convinience only and doesn#t have the full flexibility of Links etc. But they support subpackages like sub/myPage.html. You can not do ../xxx and absolute paths are excluded as well. Juergen On 2/16/06, Frank Silbermann [EMAIL PROTECTED] wrote: I've seen that within a wicket:link tag we can write ordinary HTML links and have Wicket lings automatically generated. The Component Reference examples use it as follows: wicket:link ul lia href=PanelPage.htmlwicket.markup.html.panel.Panel/a/li lia href=BorderPage.htmlwicket.markup.html.border.Border/a/li /ul /wicket:link But in all the examples, the linked pages were in the same package as the page doing the linking. Can we use wicket:link to link to pages in other packages of our application? If so, then how do we indicate the path (so as to distinguish between page classes with the same name in different packages)? Would I use something like Unix relative path notation? Or is wicket:link only useful for linking within a package? --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=kkid3432bid#0486dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid3432bid#0486dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] filling a drop-down with links ?
My application will have about 25 pages, all mutually linked. If I listed all those links at the top of every page it would take up too much space. Id like something that would only show the links when requested, e.g. a drop-down box of links. Im not sure how to do that in Wicket. The Wicket DropDownChoice seems inappropriate, since Im not really choosing anything. Would it be feasible to create in a panel an ordinary HTML drop-down, and use a ListView to populate it with, say, BookMarkable links? That way if the user wanted to select another page, hed have to click on the drop-down to show them, but otherwise theyd be out of the way. /Frank
RE: [Wicket-user] filling a drop-down with links ?
What is the formula for determining the URL of a (bookmarkable?) wicket Page, so I can set the Options VALUE attribute? [EMAIL PROTECTED] On Behalf Of Igor Vaynberg Sent: Tuesday, February 21, 2006 4:43 PM sure, wicket just produces html, you can put a listview inside a select as long as it outputs option elements. select option wicket:id=listview valur=urlspan wicket:id=title/option /select then add an attrib modifier to the listitem that adds the url into the value attribute and you are done. -Igor On 2/21/06, Frank Silbermann [EMAIL PROTECTED] wrote: My application will have about 25 pages, all mutually linked. If I listed all those links at the top of every page it would take up too much space. I'd like something that would only show the links when requested, e.g. a drop-down box of links. I'm not sure how to do that in Wicket. The Wicket DropDownChoice seems inappropriate, since I'm not really choosing anything. Would it be feasible to create in a panel an ordinary HTML drop-down, and use a ListView to populate it with, say, BookMarkable links? That way if the user wanted to select another page, he'd have to click on the drop-down to show them, but otherwise they'd be out of the way. /Frank
[Wicket-user] DatePicker won't pop up
What could prevent the Extensions project's DatePicker from popping up
when I click the DatePicker icon?
It works fine in the FormInput example, so it's not my browser settings.
For the sake of help, I've reduced my code to a bare minimum, taken
directly from the JavaDoc. Here's my HTML:
html xmlns=http://www.w3.org/1999/xhtml;
xmlns:wicket=http://wicket.sourceforge.net/; xml:lang=en lang=en
head/head
body
input type=text wicket:id=dateField size=10 /
span wicket:id=dateFieldPicker /
/body
/html
And here's my Page class:
package mem.work;
import wicket.markup.html.*;
import wicket.markup.html.form.*;
import java.util.Date;
import wicket.extensions.markup.html.datepicker.DatePicker;
public class DatePickerTest extends WebPage {
public DatePickerTest() {
TextField dateField = new TextField(dateField, Date.class);
add(dateField);
add(new DatePicker(dateFieldPicker, dateField));
}
}
What am I missing to make it pop up? (By the way, I'm using the Feb 12,
2006 Wicket 1.2 snapshot).
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RE: [Wicket-user] DatePicker won't pop up
Ive just noticed that it works for me in Mozilla. But why, then, does the FormInput examples DatePicker work for me in IE? Is there some configuration or property file setting needed to make it work in IE? Some Cascading stylesheet setting required? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Nick Heudecker Sent: Monday, February 20, 2006 11:59 AM To: wicket-user@lists.sourceforge.net Subject: Re: [Wicket-user] DatePicker won't pop up I'm having this problem on IE, but it works fine on FF. I've opened a bug on this issue.
[Wicket-user] question on DatePicker in FormInput example
In the FormInput example, we build a subclass of wicket.markup.html.form.Form to contain the date inputbox and DatePicker. For this input, the HTML inside the form is: label wicket:id=dateLabel for=datePropertyDate/label input wicket:id=dateProperty id=dateProperty type=text size=40/ span wicket:id=datePicker/span On the java side, adding the DatePicker to the Form subclass is: WebMarkupContainer dateLabel = new WebMarkupContainer(dateLabel); add(dateLabel); TextField datePropertyTextField = new TextField(dateProperty, Date.class); add(datePropertyTextField); add(new DatePicker(datePicker, dateLabel, datePropertyTextField)); Questions: (1) What is the significance of the label's for='dateProperty' attribute, and the passing of the dateLabel to the DatePicker's constructor? Is this to prevent the pop-up from covering the label? (2) Why to we make dateLabel a WebMarkupContainer, rather than an ordinary wicket.markup.html.basic.Label ? --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid3432bid#0486dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] Question about Panel in Form
I've seen examples of putting widgets into a Form, but I've not seen one where a Panel is added to a Form. Suppose I have a collection of form widgets (text boxes, radio buttons, etc.) that I need to put in forms on many different pages. If I put these components in a Panel, does adding the Panel to each Form give me the same effect as adding to each form all the widgets contained in the Panel (but with re-use of the Panel's HTML)? --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid3432bid#0486dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] conceptual question
I am wondering where I can get a conceptual overview of how Wicket works. My questions are: What sort of application data is automatically stored in the wicket servlet's HttpSession (for simplicity, assume that models are not detachable). What sort of data, if any, is stored in secret fields in the HTML on the client's browser? If I declare a variable in a Wicket object's constructor, what happens to its value when the constructor completes its execution? Does it vanish, or is it saved somewhere for the next time the page is built? I notice that users never seem to declare instance variables in their subclasses of Wicket objects. Why is this? If I did create an instance variable, how would Wicket use it? --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid3432bid#0486dat1642 ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
