Re: [Wicket-user] Best use of Links
As Igor mentioned. It is completely fine to use. Nothing wrong with it.
Juergen
On 11/20/05, Andrew Lombardi [EMAIL PROTECTED] wrote:
So, I see all this talk of using static factory methods to generate a
Page, but what would be wrong with just using
add(new Link(myLink) {
public void onClick() {
setResponsePage(new MyPage(param1, param2, param3));
}
};
this looks like it ensures that the page doesn't get created until
the link is clicked (avoiding the stack overflow problem), and it
avoids usage of PageParameters (which harken me back to MVC
frameworks anyway (ick!))...
is that right?
On Nov 18, 2005, at 3:19 PM, Eduardo Rocha wrote:
Yeah, I just forgot IPageLink and PageLink (by the way these names can
be quite confusing!), so ignore my classes, but I keep my point :P.
2005/11/18, Igor Vaynberg [EMAIL PROTECTED]:
Actually what i meant was a simple static factory method that
translates
strongly typed params into PageParameters.
ie
class MyBookmarkablePage extends WebPage {
public MyBookmarkablePage(PageParameters params) {
...
}
public static MyBookmarkablePage(String p1, int p2, String p3) {
PageParameters params=new PageParameters();
...fill in params...
return new MyBookmarkablePage(params);
}
}
also see IPageLink interface that is used by PageLink class. but i
think
this is more work, a simple Link's onclick() implementation is the
path of
least resistance imho.
-Igor
On 11/18/05, Eduardo Rocha [EMAIL PROTECTED] wrote:
If it's OK to write a little more code, you could use a factory for
the page with the same signature your constructor uses. In my
opinion
this could be more elegant, but what Igor said is simpler. Something
like (not tested):
// reusable class
public interface IPageCreator {
Page newInstance();
}
// reusable class
public class PageCreatorLink extends Link {
public PageCreatorLink(String id, IPageCreator creator) {
super(id);
this.creator = creator;
}
public void onClick() {
setResponsePage(creator.newInstance());
}
}
// your class
public class MyPageCreator implements IPageCreator {
public MyPageCreator(Object provided) {
this.provided = provided;
}
public Page newInstance() {
return new MyPage(provided);
}
}
// your class
add(new PageCreatorLink(cancelLink, new MyPageCreator(provided));
maybe your page class could also be the IPageCreator, serving like a
prototype:
// your class
public class MyPage extends WebPage implements IPageCreator {
}
The factory would be nice when you have to execute some service
method
before rendering the page, so you would have more clearly separated
responsabilities, i.e., the factory would be responsible for calling
the service and the page would act just for the view. That way your
classes would be more testable too.
2005/11/18, Igor Vaynberg [EMAIL PROTECTED]:
imho that is the best practice. that is what i use whenever i do
not
need a
bookmarkable page. i have yet to use the PageLink class.
PageLink makes
it
easier to create links to pages because it lets you specify the
class
name
of the page or the created page instance. This is ok for pages
that are
not
bookmarkable and take no parameters, but most of the time that
is not
the
case in my experience.
if you work with bookmarkable pages a lot, a static factory
method that
fills in pageparameters can help with type safety and forgotten
params.
-Igor
On 11/18/05, Gustavo Hexsel [EMAIL PROTECTED] wrote:
Hi all,
I wanted to know what's the best way to use Links (PageLinks,
BookmarkablePageLinks).
In the beginning, I was using BookmarkablePageLink's and
converting
everything to and from Strings. That obviously was flawed, as I
was
using
string names and passing them back and forth (lost strong-typing,
occasionally forgot one parameter, or mistyped the name of it).
It also
made me reload objects from the database even though I had them
handy on
the
calling class.
Then I tried using PageLink's, passing a new
XXXPage(whateverparameter) in the constructor. That didn't work
either, as
pages have links back and forth, leading to stackoverflows.
Then I moved one step up in the object hierarchy and started
using
Link's, but it seems such red tape for each link having to write:
add(new Link(cancelLink) {
public void onClick() { setResponsePage(new
EditProviderPage(provider)); };
});
Any suggestions?
[]s Gus
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[Wicket-user] Formatting numbers in Labels
With code like this anItem.add(new Label(return, new PropertyModel(tmpInstrument, diffusionProcess.localDrift))); I'm trying to display small numbers. 1.1465448173051241E-12 1.2381223801081599E-6 In the generated page this just appears as 0 or -0. I want it to be 0.012381223801081599 How can I create Labels that know how to format these small numbers? /Anders -- http://ojalgo.org/ Mathematics, Linear Algebra and Optimisation with Java --- This SF.Net email is sponsored by the JBoss Inc. Get Certified Today Register for a JBoss Training Course. Free Certification Exam for All Training Attendees Through End of 2005. For more info visit: http://ads.osdn.com/?ad_id=7628alloc_id=16845op=click ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] wicket bench 0.2.0
Version 0.2.0 of wicket bench plugin is available: http://www.laughingpanda.org/mediawiki/index.php/Wicket_Bench changes: - Igor's wicketeer is merged - initial take on navigation support (this feature will be enhanced in later versions) - renamed packages: fi.ri.wicket.bench.* - wicketbench.* Current features: http://www.laughingpanda.org/~inhuman/wicket-bench/docs/features-0.2.html There's also jira site to add bugs/RFEs: http://www.laughingpanda.org/jira/browse/WB -- Joni Suominen --- This SF.Net email is sponsored by the JBoss Inc. Get Certified Today Register for a JBoss Training Course. Free Certification Exam for All Training Attendees Through End of 2005. For more info visit: http://ads.osdn.com/?ad_id=7628alloc_id=16845op=click ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Formatting numbers in Labels
If you use BigDecimals this should work out of the box. To provide your own format you can override getConverter() on the Label or for the whole application Application.getConverterFactory(). For details see the wicket page on custom converters: http://www.wicket-wiki.org.uk/wiki/index.php/Using_custom_converters Christian On Sun, 20 Nov 2005 13:20:02 +0100, Anders Peterson [EMAIL PROTECTED] wrote: With code like this anItem.add(new Label(return, new PropertyModel(tmpInstrument, diffusionProcess.localDrift))); I'm trying to display small numbers. 1.1465448173051241E-12 1.2381223801081599E-6 In the generated page this just appears as 0 or -0. I want it to be 0.012381223801081599 How can I create Labels that know how to format these small numbers? /Anders -- Christian Essl ___ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de --- This SF.Net email is sponsored by the JBoss Inc. Get Certified Today Register for a JBoss Training Course. Free Certification Exam for All Training Attendees Through End of 2005. For more info visit: http://ads.osdn.com/?ad_id=7628alloc_id=16845op=click ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
[Wicket-user] Getting input in a link, not in submit
Hi, i have a page with a small form, a couple links and a button (submit). Now, when the button is pressed, i can get the model data, but i need that when a link is clicked, get some data of the form. How can i achieve this? Thanks.
Re: [Wicket-user] Getting input in a link, not in submit
then you need to do an onClick on the button that submits the form.only at this time you can't know that that link was clicked (or you have to do that with a special hidden field and check that field in the Form.submit () method)johanOn 11/20/05, Manuel Corrales [EMAIL PROTECTED] wrote: Hi, i have a page with a small form, a couple links and a button (submit). Now, when the button is pressed, i can get the model data, but i need that when a link is clicked, get some data of the form. How can i achieve this? Thanks.
[Wicket-user] wicket-contrib-jasperreports img resource bug
Hi,
there's a bug in JRImageResource that the size of output image does not
reflets the zoom. (It's always the same - iamage than gets cropped).
I wanted to submit a bugreport and commit a patch but I can't even
checkout the project from anonymous cvs (I've got the source code from
web interface) nor can I login to sf.
this should fix it:
class JRImageResource
...
protected byte[] getData() {
...
// create an image object
BufferedImage image = new BufferedImage((int)
(float)print.getPageWidth() * getZoomRatio()),
(int) ((float)print.getPageHeight() *
getZoomRatio()), type);
...
}
-Matej
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Re: [Wicket-user] Best use of Links
i said the static factories are only useful when you have bookmarkable pages with parameters. that means you need to create a PageParameters, fill it in, and pass it into the page's constructor. i said, imho, it is much better to have a static factory method on the page that does that because you get the benefits of typesafety when creating the pageparameters object.
-IgorOn 11/20/05, Juergen Donnerstag [EMAIL PROTECTED] wrote:
As Igor mentioned. It is completely fine to use. Nothing wrong with it.JuergenOn 11/20/05, Andrew Lombardi [EMAIL PROTECTED] wrote: So, I see all this talk of using static factory methods to generate a
Page, but what would be wrong with just using add(new Link(myLink) { public void onClick() { setResponsePage(new MyPage(param1, param2, param3));
} }; this looks like it ensures that the page doesn't get created until the link is clicked (avoiding the stack overflow problem), and it avoids usage of PageParameters (which harken me back to MVC
frameworks anyway (ick!))... is that right? On Nov 18, 2005, at 3:19 PM, Eduardo Rocha wrote: Yeah, I just forgot IPageLink and PageLink (by the way these names can
be quite confusing!), so ignore my classes, but I keep my point :P. 2005/11/18, Igor Vaynberg [EMAIL PROTECTED]: Actually what i meant was a simple static factory method that
translates strongly typed params into PageParameters. ie class MyBookmarkablePage extends WebPage { public MyBookmarkablePage(PageParameters params) {
... } public static MyBookmarkablePage(String p1, int p2, String p3) { PageParameters params=new PageParameters(); ...fill in params...
return new MyBookmarkablePage(params); } } also see IPageLink interface that is used by PageLink class. but i think
this is more work, a simple Link's onclick() implementation is the path of least resistance imho. -Igor
On 11/18/05, Eduardo Rocha [EMAIL PROTECTED] wrote: If it's OK to write a little more code, you could use a factory for
the page with the same signature your constructor uses. In my opinion this could be more elegant, but what Igor said is simpler. Something like (not tested):
// reusable class public interface IPageCreator { Page newInstance(); } // reusable class
public class PageCreatorLink extends Link { public PageCreatorLink(String id, IPageCreator creator) { super(id); this.creator
= creator; } public void onClick() { setResponsePage(creator.newInstance()); } }
// your class public class MyPageCreator implements IPageCreator { public MyPageCreator(Object provided) { this.provided = provided;
} public Page newInstance() { return new MyPage(provided); } } // your class
add(new PageCreatorLink(cancelLink, new MyPageCreator(provided)); maybe your page class could also be the IPageCreator, serving like a prototype:
// your class public class MyPage extends WebPage implements IPageCreator { } The factory would be nice when you have to execute some service
method before rendering the page, so you would have more clearly separated responsabilities, i.e., the factory would be responsible for calling the service and the page would act just for the view. That way your
classes would be more testable too. 2005/11/18, Igor Vaynberg [EMAIL PROTECTED]: imho that is the best practice. that is what i use whenever i do
not need a bookmarkable page. i have yet to use the PageLink class. PageLink makes it easier to create links to pages because it lets you specify the
class name of the page or the created page instance. This is ok for pages that are not bookmarkable and take no parameters, but most of the time that
is not the case in my experience. if you work with bookmarkable pages a lot, a static factory method that
fills in pageparameters can help with type safety and forgotten params. -Igor
On 11/18/05, Gustavo Hexsel [EMAIL PROTECTED] wrote: Hi all,
I wanted to know what's the best way to use Links (PageLinks, BookmarkablePageLinks). In the beginning, I was using BookmarkablePageLink's and
converting everything to and from Strings.That obviously was flawed, as I was using string names and passing them back and forth (lost strong-typing,
occasionally forgot one parameter, or mistyped the name of it). It also made me reload objects from the database even though I had them handy on
the calling class. Then I tried using PageLink's, passing a new XXXPage(whateverparameter) in the constructor.That didn't work
either, as pages have links back and forth, leading to stackoverflows. Then I moved one step up in the object hierarchy and started
using Link's, but it seems such red tape for each link having to write: add(new Link(cancelLink) { public void onClick() { setResponsePage(new
EditProviderPage(provider)); }; }); Any suggestions?
[]s Gus
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Re: [Wicket-user] wicket-contrib-jasperreports img resource bug
Thanks, it's fixed.
Eelco
On 11/20/05, Matej Knopp [EMAIL PROTECTED] wrote:
Hi,
there's a bug in JRImageResource that the size of output image does not
reflets the zoom. (It's always the same - iamage than gets cropped).
I wanted to submit a bugreport and commit a patch but I can't even
checkout the project from anonymous cvs (I've got the source code from
web interface) nor can I login to sf.
this should fix it:
class JRImageResource
...
protected byte[] getData() {
...
// create an image object
BufferedImage image = new BufferedImage((int)
(float)print.getPageWidth() * getZoomRatio()),
(int) ((float)print.getPageHeight() *
getZoomRatio()), type);
...
}
-Matej
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Re: [Wicket-user] Re: There must be some docs somewhere?
wicket-contrib-data and wicket-contrib-data-hibernate do not provide any form of transaction management. furthermore, they are obsolete due to repeater package (what used to be wicket-contrib-dataview) in wicket-extensions. also, this discussion did not have much to do with spring itself, but with the fact that it isnt the greatest idea to tightly couple your persistence layer with your ui layer, because that forces your business logic to live inside the ui. i am familiar with spring so that is what i chose to build the example of how not to do that, same functionality can be accomplished with a slew of other technologies. so far all i see is whining that we should have a wicket/hibernate integration framework, but no one has actually pointed out what features/functionality it should provide. so how about something more concrete? and an explanation of why wicket - a user interface framework - should provide transaction management services. -IgorOn 11/18/05, Nathan Hamblen [EMAIL PROTECTED] wrote: I don't think we all agree about Spring's role in Wicket. It's fine tosay that Spring will open and close Hibernate transactions if you wantto use it, but that's not a good reason to delete projects that do the same thing without Spring.NathanIgor Vaynberg wrote: irt spring+hibernate+wicket: Dan is absolutely correct when he says that wicket should never touch hibernate directly. all the hibernate-related logic should stay inside spring and be exposed directly through a dao object or through a service facade. i think wicket-contrib-data and wicket-contrib-data-hibernate should be taken out of cvs as they do not display good programming practices in general. i thought Phil was going to do that, but i guess he never got around to it, are you reading Phil? take a look at wicket-phonebook in wicket-stuff, its an extremely simple crud application that uses the above technologies. it also has excellent javadoc thanks to Gwyn. irt general dao: if you are talking about pulling out data from the database to display, such dao already exists and is documented. look up: IDataProvider in wicket-extensions. it is used by the DataView component which is also in the extensions. to see a demo of these look in wicket-phonebook or wicket-examples - repeaters. the repeater examples build upon each other from a simple looping view to a fully database driven datatable component. irt spring integration: spring integration doesn't come easy with a framework like wicket. unlike servlets which are fairly static singletons wicket applications consist of a lot of volatile objects with varying life cycles. this makes keeping dependencies difficult especially because objects are often serialized. there are basically two approaches: simpler approach is to keep all your dependencies in wicket's singleton Application object and let everything else look up dependencies from there, the other approach is more sophisticated - it involves creating proxies for dependencies that can be serialized and retain enough information to be able to look up the dependency when they are deserialized (possibly in another vm). i recently wrote up an article on this in the wiki that describes the two ways: http://www.wicket-wiki.org.uk/wiki/index.php/Spring i haven't had much time to spend on it so its rough around the edges. people should feel free to fix it, it is a wiki after all. irt detaching: the whole idea of detaching objects is to reduce session state. if you have a pretty big object that you are using as a model, why keep it in session when you can only keep the id and load the object when it is fist accessed. if you are using the object as a model for the form, then you don't need to reattach/lock it, just use hibernate merge instead of saveorupdate. see wicket-phonebook for both use cases. irt trail tutorial: if someone can come up with a scope/spec for a small wicket+hibernate+spring application / trail breakdown i can put one together as long as other people promise to write documentation, some javadoc, and dress up the html templates. -Igor On 11/17/05, *Dan Gould* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Sam Gendler wrote: ... The nice thing is that if examples use a fairly generic DAO abstraction, it should be possible to provide nice examples that aren't dependant upon any particular suite of technologies.Just describe the DAO interface and then use those them to access standard POJOs.Obviously, most folks will probably be doing a Hibernate/Spring thing, so addressing best practices for combin ing those technologies with Wicket is enormously valuable, but it should be secondary to providing generic best practices for dealing with DAO access, detachability, etc. ... 1. hibernate/spring integration (separate from wicket) 2. hibernate/spring/wicket best practices Sam -- all of what you propose sounds excellent. [The tradional example has been the pet shop, but nowadays, I think a blogging system is a nice worked example for
Re: [Wicket-user] Re: There must be some docs somewhere?
I don't agree with wicket-contrib-data being obsolete. What happened is that I created some basic Hibernate support classes last year, and that other people commented that they didn't like them so much, and wanted to add alternatives. From there it grew into the bunch a quasi related classes it is now. I still think classes like HibernateObjectModel are pretty useable. You may argue about how elegant the choices as hibernate session delegate etc are, and you may even argue that it is not best practice to bind to Hibernate in your view layer. But not every project has to display the perfect seperation of (service) layers and these classes gives users the opportunity to go for a more RAD approach. Depending on how much Phil (and did other people work on that project?) wants to keep, we could do a clean-up and keep only the classes we still think are usuable. We don't have to promote the project as best practices, but saying it's obsolete goes a bit too far. Eelco On 11/20/05, Igor Vaynberg [EMAIL PROTECTED] wrote: wicket-contrib-data and wicket-contrib-data-hibernate do not provide any form of transaction management. furthermore, they are obsolete due to repeater package (what used to be wicket-contrib-dataview) in wicket-extensions. also, this discussion did not have much to do with spring itself, but with the fact that it isnt the greatest idea to tightly couple your persistence layer with your ui layer, because that forces your business logic to live inside the ui. --- This SF.Net email is sponsored by the JBoss Inc. Get Certified Today Register for a JBoss Training Course. Free Certification Exam for All Training Attendees Through End of 2005. For more info visit: http://ads.osdn.com/?ad_idv28alloc_id845op=click ___ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user
Re: [Wicket-user] Getting input in a link, not in submit
Maybe i was not clear about my problem. What i need is that when i click the link get some info and redirect to other page. So far, the only way i can get the info is getting the model on the onSubmit method, but that method i use it for redirect to a diferent page.On 11/20/05, Johan Compagner [EMAIL PROTECTED] wrote:then you need to do an onClick on the button that submits the form. only at this time you can't know that that link was clicked (or you have to do that with a special hidden field and check that field in the Form.submit () method)johanOn 11/20/05, Manuel Corrales [EMAIL PROTECTED] wrote: Hi, i have a page with a small form, a couple links and a button (submit). Now, when the button is pressed, i can get the model data, but i need that when a link is clicked, get some data of the form. How can i achieve this? Thanks.
Re: [Wicket-user] Getting input in a link, not in submit
I don't know if I understand you right but enclosed is a component which
behaves (and is) exactly like a Wicket Button but renders instead a
href=javascript:document.generatedFormName.submit(), which triggers the
form submit.
One of the SubmitLinks must be given the form in the constructor to
register an AttributeModifier, which sets the name attribute of the form.
The usage is:
final MyModel mod = new MyModel();
Form f = new Form(linkForm, new CompoundPropertyModel(mod));
f.add(new TextField(value1));
f.add(new SubmitLink(link1, f) {
protected void onSubmit() {
System.out.println(Link1 was clicked, value1 is:
+ mod.getValue1());
};
});
f.add(new SubmitLink(link2) {
protected void onSubmit() {
System.out.println(Link2 was clicked, value1 is:
+ mod.getValue1());
};
});
html:
form wicket:id=linkForm
input wicket:id=value1 type=text size=30/
a wicket:id=link1Press link1 to submit/a
a wicket:id=link2Press link 2 to submit/a
input type=submit value=Send/
/form
Hope that helps,
Christian
On Sun, 20 Nov 2005 21:28:54 -0300, Manuel Corrales
[EMAIL PROTECTED] wrote:
Maybe i was not clear about my problem. What i need is that when i click
the
link get some info and redirect to other page. So far, the only way i can
get the info is getting the model on the onSubmit method, but that
method i
use it for redirect to a diferent page.
On 11/20/05, Johan Compagner [EMAIL PROTECTED] wrote:
then you need to do an onClick on the button that submits the form.
only at this time you can't know that that link was clicked (or you have
to do that with a special hidden field and check that field in the
Form.submit () method)
johan
On 11/20/05, Manuel Corrales [EMAIL PROTECTED] wrote:
Hi, i have a page with a small form, a couple links and a button
(submit).
Now, when the button is pressed, i can get the model data, but i need
that when a link is clicked, get some data of the form.
How can i achieve this?
Thanks.
--
Christian Essl
SubmitLink.java
Description: Binary data
Re: [Wicket-user] Getting input in a link, not in submit
Sorry I just realized that the SubmitLink before had a bug (test, test,
test ;)).Enclosed is something which should work - at least for FireFox
and IE it does. Please test it if you need it - at all.
Thanks,
Christian
On Mon, 21 Nov 2005 04:43:26 +0100, Christian Essl
[EMAIL PROTECTED] wrote:
I don't know if I understand you right but enclosed is a component which
behaves (and is) exactly like a Wicket Button but renders instead a
href=javascript:document.generatedFormName.submit(), which triggers
the
form submit.
One of the SubmitLinks must be given the form in the constructor to
register an AttributeModifier, which sets the name attribute of the
form.
The usage is:
final MyModel mod = new MyModel();
Form f = new Form(linkForm, new CompoundPropertyModel(mod));
f.add(new TextField(value1));
f.add(new SubmitLink(link1, f) {
protected void onSubmit() {
System.out.println(Link1 was clicked, value1 is:
+ mod.getValue1());
};
});
f.add(new SubmitLink(link2) {
protected void onSubmit() {
System.out.println(Link2 was clicked, value1 is:
+ mod.getValue1());
};
});
html:
form wicket:id=linkForm
input wicket:id=value1 type=text size=30/
a wicket:id=link1Press link1 to submit/a
a wicket:id=link2Press link 2 to submit/a
input type=submit value=Send/
/form
Hope that helps,
Christian
On Sun, 20 Nov 2005 21:28:54 -0300, Manuel Corrales
[EMAIL PROTECTED] wrote:
Maybe i was not clear about my problem. What i need is that when i click
the
link get some info and redirect to other page. So far, the only way i
can
get the info is getting the model on the onSubmit method, but that
method i
use it for redirect to a diferent page.
On 11/20/05, Johan Compagner [EMAIL PROTECTED] wrote:
then you need to do an onClick on the button that submits the form.
only at this time you can't know that that link was clicked (or you
have
to do that with a special hidden field and check that field in the
Form.submit () method)
johan
On 11/20/05, Manuel Corrales [EMAIL PROTECTED] wrote:
Hi, i have a page with a small form, a couple links and a button
(submit).
Now, when the button is pressed, i can get the model data, but i need
that when a link is clicked, get some data of the form.
How can i achieve this?
Thanks.
--
Christian Essl
SubmitLink.java
Description: Binary data
