Scrolling to Elements/Widgets in Some Container
Hi all, Let's say that I have a VerticalPanel that contains some Composite widgets. I place this VerticalPanel inside a Scroll Panel. Now, I would like to be able to click a link in one of the Composites, and have the ScrollPanel scroll its contents to another Composite widget in the same VerticalPanel. When I tried use Anchor widgets with their id attributes set (named anchors are not supported in HTML 5) and I set the href attributes of the corresponsing clickable Anchors to href="#...", the whole view scrolls incorrectly. - Is there any way to achieve the effect of ordinary named anchors and anchor links in GWT using widgets? - Can element.scrollIntoView() be used somehow? How to limit the scope to just the scroll panel and not the whole view? Thanks! - JM -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at https://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/d/optout.
Re: Detect the selected language
Hi Stefan, Is com.google.gwt.i18n.client.LocaleInfo.getCurrentLocale() what you're looking for? Hope this helps. //Jason On Tue, Oct 12, 2010 at 10:08 AM, StrongSteve swe.sta...@gmail.com wrote: Hello, I have a GWT application with I18N features. Within one composite I do not want to access internationalized strings but I want to know which language is selected. So my question is if there is a mechanism like GWT.getSelectedLanguage() which would return en or de. Is there such a thing? An intensive internet research did not help me... :( Thanks in Advance for your time! Greetings Stefan -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: Database and GWT
Hi Charlie, By join I'll assume you're talking about a straight database JOIN, in which case: it's handled in EoD. EoD doesn't parse or restructure your SQL (much the way iBatis doesn't); and it generates it's internal ResultSet - Object mapping structures on a case-by-case basis. It's a loose mapping system, so columns that can't be mapped to the object are ignored; as are object fields that don't appear to have columns in the ResultSet (this allows you to use many different SQL queries to load the same object). An important principal of EoD is that your object model doesn't need to conform to the database (although it generally does). The object mapping is done based on the ResultSet of each SQL query rather than the database tables. Hope that answers your question. //Jason On Mon, Aug 23, 2010 at 9:34 PM, charlie charlie.f...@gmail.com wrote: I don't see anything related to joins in any of those links or mailing lists, is this easily doable in EoD ? On Mon, Aug 23, 2010 at 11:39 AM, barnaclehead ba6...@gmail.com wrote: I have had much success with EoDSQL. I am surprised there isn't more talk about it. It is a very simple db abstraction where you write your own queries and there is great GWT support. The project home is at: https://eodsql.dev.java.net/ and there is plenty of information on the authors' blog http://lemnik.wordpress.com/2010/02/02/eod-sql-2-1-released/ The best tutorial is the docs/tutorial.html from the downloaded package. There is a users mailing list but it isn't overly active, but still responsive. The archive is at: https://eodsql.dev.java.net/servlets/SummarizeList?listName=users Good luck, Barry. On Aug 5, 3:56 pm, Diego Venuzka dvenu...@gmail.com wrote: Hi! After some hours without sleep to solve my compilation problem, i stop in another problem. I'll need to insert data in database, and how GWT can help with this? Or i can insert using the tradicional method with Java? Thanks =) -- Diego Venuzka -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- charlie/ -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: Cleaning up threads on GWT application shutdown
Hi Jim, Generally I would register a ServletContextListener with the application-server (in your case Tomcat) to start and stop background services. You would register it in your web.xml file: listener listener-classcom.company.webapp.MyContextListener/listener-class /listener Hope this is what you're looking for. //Jason On Wed, Jun 9, 2010 at 12:02 AM, jjd jjdemp...@gmail.com wrote: I have a GWT application that starts an independent thread and leaves it running for use by multiple GWT sessions. It appears that under Tomcat, when I Stop of Undeploy the application, this thread keeps running. I can't figure out the right way to manage shutting down the thread when the application is stopped (but tomcat keeps running). I tried adding a ShutdownHook using Runtime.getRuntime().addShutdownHook(), but that doesn't get called until Tomcat itself is shutdown. What is the proper way to manage threads at application shutdown time? Thanks, --Jim-- -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: How to scroll page to element
I assume you're using GWT 2.0. If so dom.client.Element has a method:
scrollIntoView which may be what you are looking for.
To scroll to a Button for example:
Button button = new Button();
//...
button.getElement().scrollIntoView();
This will scroll any required elements (including ScrollPanels and the
document itself) to make sure that the Button is visible to the user.
Hope that helps.
//Jason
On Tuesday, 13 April 2010 10:35:21 mram wrote:
I don't understand well your question, but why don't you use div to
separate parts from the page, and then call the div class that you
need??
On 13 abr, 08:55, redlaber vyalov.e...@gmail.com wrote:
The next problem: I have finished big gwt-application and I cant add a
ScrollPanel in it. But i know position of browser scrollbar, where I
want to jump (scroll). Is there no way to simply scroll through the
document to a given position?
On 12 апр, 19:12, t.dave da...@lorgeousdays.com wrote:
use ScrollPanel.setScrollPosition(). that sets the vertical scroll
position of the scrollpanel, which you will need to calculate. try
something like this:
new ClickHandler() {
public void onClick( ClickEvent event ) {
int tableTop = secondFlexTable.getAbsoluteTop();
scrollPanel.setScrollPosition( tableTop );
}
}
i suppose in your case it wouldn't be a click handler if you're basing
it off the history token, but hopefully this will point you in the
right direction.
On Apr 12, 7:34 am, redlaber vyalov.e...@gmail.com wrote:
I want to scroll page, generated with gwt, to some element. Its
should be simple, but i cannt find the solution. For example: I have
a vertical panel with two flexables. When i get the history token
goto2 I want to scroll my page to the second table. (Sorry for the
terrible english).
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Re: How to prepend?
The insertFirst method on the DOM model will also fail to register / unregister any event listeners. To insert a Widget at the beginning of any ComplexPanel (such as RootPanel) use: panel.insert(widget, 0); If all you want to do is modify the DOM structure: DivElement div = Document.createDivElement(); div.setInnerText(myDiv); Document.get().getElementById(entries).insertFirst(div); Hope this helps a bit. // Jason On Tuesday, 15 December 2009 01:08:17 Dennis Madsen wrote: Thanks for your reply! I cannot find a way to implement what do write. I'm doing something like: HTML widget = new HTML(div class='entry'myDiv/div); RootPanel.get(entries).getElement().insertFirst(widget); But the insertFirst takes a node instead of a HTML widget. Any suggestions? On 14 Dec., 18:44, Nicanor Cristian nicanor.bab...@gmail.com wrote: That's not necessary. Suppose you want to insert an newWidget before the element widget1. All you have to do is: widget1.getParent().getElement().insertBefore(newWidget, widget1.getElement()); On 12/14/2009 06:14 PM, Dennis Madsen wrote: I new to GWT - that's why! :) Could you like me to a tutorial/sample about these custom widgets? On 14 Dec., 18:06, Arthur Kalmensonarthur.k...@gmail.com wrote: Oh, why not just create a custom widget to display entries by date? -- Arthur Kalmenson On Mon, Dec 14, 2009 at 12:04 PM, Dennis Madsenden...@demaweb.dk wrote: I'm doing some kind of guestbook which automatic async receive new guestbook entries. As the newest entry has to be on the top, is why I would like to prepend instead of adding/append. Since I'm receiving a lot of entries, it is not a solution to manually create a div in the markup for each of them. Hope you understand! On 14 Dec., 17:55, Arthur Kalmensonarthur.k...@gmail.com wrote: You could just add another div before the entries and add to that div. -- Arthur Kalmenson On Mon, Dec 14, 2009 at 11:38 AM, Dennis Madsenden...@demaweb.dk wrote: I'm adding a label into a div on my HTML: RootPanel.get(entries).add(myLabel); But what if I would like to prepend the label instead of adding it? How can I do so? -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group athttp://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group athttp://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group athttp://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. -- You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
Re: java.util.List
Hi ben,
If you are using a version of GWT 2.0 this error appears because the standard
GWT List interface
doesn't have the subList method. You can either remove the @Override annotation
from that method, or
extend AbstractList instead of implementing List directly (generally considered
a better option
anyways).
You could also upgrade to GWT 2.0-rc, which has the subList method included in
the interface definition.
Hope that helps.
//Jason
ben fenster wrote:
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
public class bla implements ListString {
@Override
public boolean add(String e) {
// TODO Auto-generated method stub
return false;
}
@Override
public void add(int index, String element) {
// TODO Auto-generated method stub
}
@Override
public boolean addAll(Collection? extends String c) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean addAll(int index, Collection? extends String c) {
// TODO Auto-generated method stub
return false;
}
@Override
public void clear() {
// TODO Auto-generated method stub
}
@Override
public boolean contains(Object o) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean containsAll(Collection? c) {
// TODO Auto-generated method stub
return false;
}
@Override
public String get(int index) {
// TODO Auto-generated method stub
return null;
}
@Override
public int indexOf(Object o) {
// TODO Auto-generated method stub
return 0;
}
@Override
public boolean isEmpty() {
// TODO Auto-generated method stub
return false;
}
@Override
public IteratorString iterator() {
// TODO Auto-generated method stub
return null;
}
@Override
public int lastIndexOf(Object o) {
// TODO Auto-generated method stub
return 0;
}
@Override
public ListIteratorString listIterator() {
// TODO Auto-generated method stub
return null;
}
@Override
public ListIteratorString listIterator(int index) {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean remove(Object o) {
// TODO Auto-generated method stub
return false;
}
@Override
public String remove(int index) {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean removeAll(Collection? c) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean retainAll(Collection? c) {
// TODO Auto-generated method stub
return false;
}
@Override
public String set(int index, String element) {
// TODO Auto-generated method stub
return null;
}
@Override
public int size() {
// TODO Auto-generated method stub
return 0;
}
@Override
public ListString subList(int fromIndex, int toIndex) {
return null;
}
@Override
public Object[] toArray() {
// TODO Auto-generated method stub
return null;
}
@Override
public T T[] toArray(T[] a) {
// TODO Auto-generated method stub
return null;
}
}
i am did the exact same thing and got
[ERROR] Line 131: The method subList(int, int) of type bla must
override or implement a supertype method
On 23 נובמבר, 16:07, Paul MERLIN eskato...@gmail.com wrote:
Le lundi 23 novembre 2009 15:05:18, ben fenster a écrit :
im sorry but i was under some presure i have a close deadline and
thats pretty much the only problem idid you create an anonymous class
or a class that implements the list
public class Test implements ListString { ... }
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Re: java.util.List
Eclipse fills in methods based on the JDK installed, not the GWT emulated JRE.
GWT's implementation
of the JRE sits in the package com.google.gwt.emul.java, not java.
ben fenster wrote:
thanks i removed the override and it worked can you please tell me why
did act like that since the eclipse filled out the implementation
acording to the interface and if the method is not suppored how did
it got into the imlementation in the first place
On 23 נובמבר, 16:52, Jason Morris lem...@gmail.com wrote:
Hi ben,
If you are using a version of GWT 2.0 this error appears because the
standard GWT List interface
doesn't have the subList method. You can either remove the @Override
annotation from that method, or
extend AbstractList instead of implementing List directly (generally
considered a better option
anyways).
You could also upgrade to GWT 2.0-rc, which has the subList method included
in the interface definition.
Hope that helps.
//Jason
ben fenster wrote:
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
public class bla implements ListString {
@Override
public boolean add(String e) {
// TODO Auto-generated method stub
return false;
}
@Override
public void add(int index, String element) {
// TODO Auto-generated method stub
}
@Override
public boolean addAll(Collection? extends String c) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean addAll(int index, Collection? extends String c) {
// TODO Auto-generated method stub
return false;
}
@Override
public void clear() {
// TODO Auto-generated method stub
}
@Override
public boolean contains(Object o) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean containsAll(Collection? c) {
// TODO Auto-generated method stub
return false;
}
@Override
public String get(int index) {
// TODO Auto-generated method stub
return null;
}
@Override
public int indexOf(Object o) {
// TODO Auto-generated method stub
return 0;
}
@Override
public boolean isEmpty() {
// TODO Auto-generated method stub
return false;
}
@Override
public IteratorString iterator() {
// TODO Auto-generated method stub
return null;
}
@Override
public int lastIndexOf(Object o) {
// TODO Auto-generated method stub
return 0;
}
@Override
public ListIteratorString listIterator() {
// TODO Auto-generated method stub
return null;
}
@Override
public ListIteratorString listIterator(int index) {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean remove(Object o) {
// TODO Auto-generated method stub
return false;
}
@Override
public String remove(int index) {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean removeAll(Collection? c) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean retainAll(Collection? c) {
// TODO Auto-generated method stub
return false;
}
@Override
public String set(int index, String element) {
// TODO Auto-generated method stub
return null;
}
@Override
public int size() {
// TODO Auto-generated method stub
return 0;
}
@Override
public ListString subList(int fromIndex, int toIndex) {
return null;
}
@Override
public Object[] toArray() {
// TODO Auto-generated method stub
return null;
}
@Override
public T T[] toArray(T[] a) {
// TODO Auto-generated method stub
return null;
}
}
i am did the exact same thing and got
[ERROR] Line 131: The method subList(int, int) of type bla must
override or implement a supertype method
On 23 נובמבר, 16:07, Paul MERLIN eskato...@gmail.com wrote:
Le lundi 23 novembre 2009 15:05:18, ben fenster a écrit :
im sorry but i was under some presure i have a close deadline and
thats pretty much the only problem idid you create an anonymous class
or a class that implements the list
public class Test implements ListString { ... }
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Re: How can I disable context menu in RichTextArea?
To re-iterate what has already been said: you can't truly disable this menu in
Opera (in fact you
won't even get the event by default).
However, if you are determined to try, this may help:
public class MyRichTextArea extends RichTextArea {
public MyRichTextArea() {
addDomHandler(new ContextMenuHandler() {
public void onContextMenu(ContextMenuEvent event) {
// open your popup menu here
event.preventDefault();
}
}, ContextMenuEvent.getType());
}
}
This should work as expected for most browsers.
Taimur Mirxa wrote:
I have checked the GoogleDocs application, in Google docs, it is also
showing the customized menu instead of broswer's menu. hope if you guys
can come up with any idea how it is accomplishing it?
the snap is also attached with this email.
2009/11/3 Dimitrijević Ivan dim...@gmail.com mailto:dim...@gmail.com
Do not use right-mouse click popup menu. This is not supported by all
browsers. For instance, in Opera you should change configuration in
order to allow scripts to handle context menu events. Instead you can
detect mouse-over event, and depending of object which is hovered, you
can display a panel that contain options (Just like MS Word does, or
GMail when you select picture).
On Nov 3, 6:46 am, Taimur Mirxa taim...@gmail.com
mailto:taim...@gmail.com wrote:
Mike,
I really appreciate your help, but this is not working in
firefox. on the
other side this method is working fine in hosted mode and IE. any
idea?
On Mon, Nov 2, 2009 at 12:04 PM, Michael Sullivan
msull...@yahoo.com mailto:msull...@yahoo.comwrote:
In your client code somewhere, create this native function:
protected native void blockBrowserContextMenu(Element
elem) /*-{
elem.oncontextmenu = function(e) {
return false;
};
}-*/;
Then, when you create your RichTextArea, call 'getElement()' on
your
RTA instance and pass it to the given native method.
That will block browser context menus for that instance of
RichTextArea and for no other part of your UI. (Though you may
want
to consider
re-implementing Cut/Copy/Paste on your custom menu, as they may be
expected by your users).
Mike
On Nov 2, 8:39 am, Taimur Mirxa taim...@gmail.com
mailto:taim...@gmail.com wrote:
Folks,
I have created my own popup menu, which I want to display in
RichTextArea,
and it is appearing with right mouse click. my problem is
that default
broswer's context menu does also appear along with my menu.
is there any
resolution for this?
I have seen lots of examples and code but all of them were
disabling
broswer's default menu that shows View Source and other
options, I do not
want to disable it, rather my point is to disable the context
menu which
appears in text fields or rich text areas.
--
Warm Regards,
Taimur Mirza
[To predict the behavior of ordinary people in advance, you
only have to
assume that they will always try to escape a disagreeable
situation with
the
smallest possible expenditure of intelligence. - Friedrich
Nietzsche]
--
Warm Regards,
Taimur Mirza
[To predict the behavior of ordinary people in advance, you only
have to
assume that they will always try to escape a disagreeable
situation with the
smallest possible expenditure of intelligence. - Friedrich
Nietzsche]
--
Warm Regards,
Taimur Mirza
[To predict the behavior of ordinary people in advance, you only have to
assume that they will always try to escape a disagreeable situation with
the smallest possible expenditure of intelligence. - Friedrich Nietzsche]
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Re: Need to get around Async calls
Hi Parmeet,
Why not wrap each type of test step in a Command, which also implements
AsyncCallback. Then allow
them to be chained together:
public abstract class AsyncCommandT implements AsyncCallbackT, Command {
private final Command next;
protected AsyncCommand(final Command next) {
this.next = next;
}
protected abstract void onSuccessImpl(T value);
public final void onSuccess(final T value) {
try {
onSuccessImpl(value);
} finally {
DeferredCommand.addCommand(next);
}
}
public void onFailure(final Throwable error) {
// generic failure code in here
}
}
The execute() method of the AsyncCommand submits itself to the RPC service, and
the AsyncCommand
will run the next step of the process, if the current one was successful. This
means you can build
up your chain of test steps up fron, and then just execute() the first one.
Hope that helps a bit.
//Jason.
Parmeet Kohli wrote:
Hi All,
I'm developing a web based testing tool using GWT as the
front end. This tool allows the user to add several test steps to a
test case. The user has the option to run these test steps
individually or the whole test case together. The latter option seems
to be an issue though. The problem being that these tests must get
executed in the sequence the user has suggested (The result of the one
might affect another). But the asynchronous nature of GWT RPC is
making life difficult. Any suggestions ??
PS: Its not as simple as placing whatever i want to do after the RPC
call in the onSuccess method. The user might add any number of test
steps with different parameters.
Thanks,
Parmeet
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Re: Using a define in java
You have several options actually.
To do exactly what you are trying to, you would use something like:
public interface RuntimeParameters {
public static final String PAGE_URL = http://blablabla;;
}
and then use RuntimeParameters.PAGE_URL.
However, this is probably not what you actually want to do. A much better idea
generally is to use
the page location or module location URL as the prefix for your page (and make
sure that the page
has the same name in each environment). You can do this in GWT with:
GWT.getHostPageBaseURL() - to get the directory URL for the HTML page, or
GWT.getModuleBaseURL() - to the the directory URL of the JavaScript files
So something like:
final String pageUrl = GWT.getHostPageBaseURL() + users.php;
Is far preferred to changing variable names between builds.
Generally it's considered a good idea to keep all of your environments as
similar as possible. If
you run Apache with PHP in production, you should generally run it locally for
development as well
(this is why GWT supports the '-noserver' option).
I hope this helps a bit.
//Jason
tedpottel wrote:
Hi
I may have already posted this, but cannot find it.
I’n using Ajax code, I have 3 different servers the php file is in,
depending on what I’m debugging. I have the Jiffy server when
debugging within eclipse, then I have my local Apache server, when I’m
trying to debug the php code, and a different server name for
production run.
C and PHP has a define statement, whare I could have something like
#define server /local/
And include it in all my files.
Is there a way to do this in java, so I can easly switch the server
name, without having to change it superbly in all my classes?
Ted Define
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Re: JavaScriptObject won't load - 32 bit Java on Win64.
Hi Ben,
You are trying to use GWT client-side classes on the server-side. These classes
are supposed to be
compiled to JavaScript, not to be run in a Java VM.
You will need to either use JSON.org classes, some other JSON classes, or
spit-out the JSON as a
String directly. Your choice ;)
That said: it looks like you're using RPC, which will handle serialization of
GWT Java objects to
real Java objects by itself. Adding JSON into such a mix is an unnecessary
overhead. Either work
with pure HTTP and JSON, or make use of the GWT RPC mechanism. If you're not
using RPC, ignore this
part ;)
Hope that helps a bit.
// Jason
Ben wrote:
I've run into the same problem as this post:
http://groups.google.com/group/Google-Web-Toolkit/msg/b93efbbdf07d9d37
The issue is that all of the JSON classes in
com.google.gwt.json.client appear to be unusable on the server-side
implementation classes, because they depend on
com.google.gwt.core.client.JavaScriptObject, which won't load due to
an UnsatisfiedLinkError when loading the classdef for
JavaScriptObject. I'm using Java 1.6.0_14-b08 x32 on Windows XP-64.
(I can't use 64-bit Java because then GWT won't run at all.)
To demonstrate this, I took the GWT 1.7 default web-application, and
modified GreetingServiceImpl.java like this:
public String greetServer(String input) {
try {
new com.google.gwt.json.client.JSONArray();
}
catch (Throwable t) {
return Poop: + t.getClass().getName() +: + t.getMessage();
}
The result is this: Poop: java.lang.UnsatisfiedLinkError:
com.google.gwt.core.client.JavaScriptObject.createArray()Lcom/google/
gwt/core/client/JavaScriptObject;
Any thoughts? Or should I just give up on using GWT's built-in JSON
libs and switch to JSON.org?
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Re: Why do we define AsyncCallbacks inline?
Thats typically the way I deal with things, it allows you to isolate eat
action that occurs
against the server.
It also allows those actions to be developed against client side interfaces.
One of the more common
use cases I have is Page structures. Any list / table / scrollable view that
needs to lazy load
lots of data runs through the same FetchPage action (which encapsulates the
fetch from an Async
interface and the push into a PagedModel object when the response is returned).
Another could be a SaveAction that stores an object on the server and validates
that it was stored
in the response.
This is the main reason I favor working with top-level classes: it lets you
code a step away from
your actual work-structure (and so improve code re-usability).
Hope that helps.
//J
Bakul wrote:
Jason,
Does it mean I need to create a Action class for all kind of a backend
call?
I mean, suppose I have three function call to back end from Async
Interface:
1. addItem(..., AsyncCallBackT callBack);
2. updateItem(..., AsyncCallBackT callBack);
3. deleteItem(..., AsyncCallBackT callBack);
In this case, do I need to create three Aciton classes which extends
RetryAction?
-Bakul
On Aug 23, 9:08 am, Jason Morris lem...@gmail.com wrote:
I would personally say that creating top-level or inner classes for the
response of an async
callback (or an event) is often the best way to do it.
Encapsulation is one of the main reasons we use OO languages because it
encourages re-use. If you
take a look at my blog post
here:http://lemnik.wordpress.com/2008/07/17/a-useful-gwt-rpc-pattern-ive-b...
You'll see one of the ways in which you can leverage encapsulate logic to
make your code more
friendly. Make the RetryAction a Command object and you'll really start to
see what I mean.
I mostly find that in the long run it works better to avoid inline
callbacks, since it provides
better separation of concerns, and acts more like the Command pattern (and
you can mix in a Command
Processor to produce more complex logic).
Just my 2c worth.
Regards.
//Jason
jack wrote:
Good question - lol.
I think maybe we're not quite using the same terminology - maybe we
are.
By inner class I mean something like ...
public MyOuterClass
{
}
On Aug 23, 1:34 am, Jan Ehrhardt jan.ehrha...@googlemail.com wrote:
It's common practice to use inner classes in Java for listeners or other
simple things like callbacks.
What you want to do in the case of a callback, is invoking a method after
the the asynchronous RPC has been finished. The easiest solution would be,
to put this method as an argument to the RPC method, but since Java has no
closures, using inner classes is a nice solution. In Java 1.4, where no
inner classes where available, people implemented the AsyncCallback
interface in the class, which was calling the RPC method, so they could do
something like:
service.getSomthing(this);
But with Java 5 inner classes have become the prefered way.
Sure, you can also create your own class for this, but that's the worse
practice, I think.
What would be the best solution for this, you think?
Regards
Jan Ehrhardt
On Sat, Aug 22, 2009 at 10:43 PM, jack jack.terran...@gmail.com wrote:
In every RPC example I've seen, AsyncCallback are all defined inline?
Why is this so? What are the advantages?
Thanks in advance
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Re: Why do we define AsyncCallbacks inline?
I would personally say that creating top-level or inner classes for the
response of an async
callback (or an event) is often the best way to do it.
Encapsulation is one of the main reasons we use OO languages because it
encourages re-use. If you
take a look at my blog post here:
http://lemnik.wordpress.com/2008/07/17/a-useful-gwt-rpc-pattern-ive-been-using/
You'll see one of the ways in which you can leverage encapsulate logic to make
your code more
friendly. Make the RetryAction a Command object and you'll really start to see
what I mean.
I mostly find that in the long run it works better to avoid inline callbacks,
since it provides
better separation of concerns, and acts more like the Command pattern (and you
can mix in a Command
Processor to produce more complex logic).
Just my 2c worth.
Regards.
//Jason
jack wrote:
Good question - lol.
I think maybe we're not quite using the same terminology - maybe we
are.
By inner class I mean something like ...
public MyOuterClass
{
}
On Aug 23, 1:34 am, Jan Ehrhardt jan.ehrha...@googlemail.com wrote:
It's common practice to use inner classes in Java for listeners or other
simple things like callbacks.
What you want to do in the case of a callback, is invoking a method after
the the asynchronous RPC has been finished. The easiest solution would be,
to put this method as an argument to the RPC method, but since Java has no
closures, using inner classes is a nice solution. In Java 1.4, where no
inner classes where available, people implemented the AsyncCallback
interface in the class, which was calling the RPC method, so they could do
something like:
service.getSomthing(this);
But with Java 5 inner classes have become the prefered way.
Sure, you can also create your own class for this, but that's the worse
practice, I think.
What would be the best solution for this, you think?
Regards
Jan Ehrhardt
On Sat, Aug 22, 2009 at 10:43 PM, jack jack.terran...@gmail.com wrote:
In every RPC example I've seen, AsyncCallback are all defined inline?
Why is this so? What are the advantages?
Thanks in advance
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Re: java.io.NotSerializableException for gwt portlets - wps 6.1
This complaint is coming from WebSphere, not GWT. By implementing IsSerializable you've said this object may be serialized by GWT, but you haven't implemented normal java.io.Serializable to make it serializable by WebSphere. When session replication is turned on, any object in the session is pushed to all other WebSphere servers via normal Java serialization as part of each HTTP request / response cycle. In short, you need to implement java.io.Serializable on these objects. Hope that helps. //Jason kss wrote: We are getting java.io.NotSerializableException in one of our gwt jsr 286 api portlets in WebSphere Portal 6.1. This exception has started to surface in the logs since we enabled session replication on our WebSphere Portal server. The object which its complaining about has isSerializable interface implemented. When we dont have session replication enabled; the issue dosent occur. Has anyone seen this exception in websphere environment for gwt portlets or have any ideas ? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: RemoteService - how to get http status of the response
If the status code returned is not 200 the onFailure method will be passed StatusCodeException. The getStatusCode() method can be used from there. Hope that helps. reHa wrote: Hi I have implemented RemoteService and when I'm getting response in the callback - in methods onFailure and onSuccess - how can I get Http Status (like 200, 302 or 404) of the response. Thanks - Piotr --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Is it possible to set an onLoad event listener on an IFrameElement?
Hi Jake,
Unfortunately the DOM structure is bound more to the JavaScript way of doing
things than Widgets. In
JavaScript you can't have more than one event listener (of a given event type)
per element, while
Widgets may have any number.
So to work around this: GWT Widgets are the only listeners on their nested
Element object (notice
they implement the com.google.gwt.user.client.EventListener interface). SO when
they receive an
event from the browser, they decode it into a DOMEvent and dispatch it to all
the Handlers
registered for that Widget.
Unfortunately there is no simple way to deal with this on the DOM nodes
themselves, and in
particular there is no simple way to deal with IFrame loading events. If you
take a look at how
FormPanel receives loading events from it's hidden IFrame there are two
different implementations
(one for IE6, and the generic implementation).
For normal browsers(com.google.gwt.user.client.ui.impl.FormPanelImplIE6), the
event is hooked using:
iframe.onload = function() {
IE6 (com.google.gwt.user.client.ui.impl.FormPanelImplIE6) looks like:
iframe.onreadystatechange = function() {
if (iframe.readyState == 'complete') {
Both implementations also ensure that they unhook the events, by assigning
the listener function
to null (see FormPanel.onAttach / onDetach). I would consider extending the
Frame Widget rather than
using the DOM api directly. Widgets provide loads of useful safety nets that
you otherwise need to
write yourself (including attaching multiple Handlers to the element).
Hope this Helps.
//J
Jake wrote:
Hi all,
I just have a quick question: I know that GWT presents a fairly low-
level DOM API that wraps native DOM objects. What I'd like to do is
create a new iframe element, and then set a DOM onLoad listener on it
so that I can then manipulate the iframe's internal document (its
contentDocument). It's very easy for me to imagine how to implement
this, except for the fact that I cannot find a way to set any kind of
a listener on any of the DOM objects exposed by GWT. I found some blog
posts that mentioned that GWT's method of event handling had changed
in 1.6 [0][1], but I'm not sure if that applies only to classes that
extend Widget, or to the wrapped DOM objects as well. Hopefully I'm
just missing them.
I'd greatly appreciate any guidance anyone can offer. Thanks,
Jake
[0]
http://lemnik.wordpress.com/2009/03/04/gwts-new-event-model-handlers-in-gwt-16/
[1] http://lemnik.wordpress.com/2009/03/12/using-event-handlers-in-gwt-16/
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Re: Do I have to use foreach or for-index-loop ?
The foreach loop in normal Java will also construct an Iterator object, and
therefore is almost
always more expensive than a for-index-loop (assuming the Collection is
random-access).
I would really call this a premature optimization, but if you're really
concerned with such things,
the (technically) fastest way of doing this would be:
final int length = list.size();
for(int i = 0; i length; i++) {
Foo foo = list.get(i);
}
That applies for normal Java, for GWT the final is not required (since it has
no affect on the
output, and the compiler will declare it final anyways).
Again, serious micro-optimization that will make very little difference in the
long run.
Ed wrote:
Hellu,
Should I use the foreach or for-index-loop construction?
Is GWT smart enough to implement the best solution?
Can I simple neglect the difference in performance ?
I mean: in the Google IO presentation they mentioned that the foreach
construction creates a new Iterator object and as such is a bit more
expensive. As such they used the for-index-loop construction. ... I
can imagine when performing many foreach loops, this can become an
issue.
Ed
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Re: getInteger problem when trying to run hosted mode.
Possibly you are looking for Integer.decode instead of Integer.parseInt? Joel Paulsson wrote: Thanks for the help, i think i follow. I'll have to look into why Integer.parseInt didn't return the value i thought it would return then. On 16 Juni, 07:34, Dean S. Jones deansjo...@gmail.com wrote: Integer.getInteger(name) gets an integer from System properties. it is ( roughly ) equal to: Integer.parseInt(System.getProperty(name)); So, in the GAE, what is the definition if System.getProperty() ??? You have no method or means of setting them, you don't know the properties of the Runtime Environment Thus, it is useless to ask... and the method is not provided. On Jun 15, 5:00 pm, Joel Paulsson mean@gmail.com wrote: Hi! I run gwt as a plug-in to Eclipse and i have no errors in Eclipse, but when i run the program to hosted mode i get this error in the AppEngine Server: [ERROR] Line 53: The method getInteger(String) is undefined for the type Integer If i comment that line it works great, but using getInteger is pretty vital for me in this application so i need it to work. Can anyone help me understand why i get this error when i don't have any compilation errors and maybe find a soloution? /Joel --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Server initialization
Personally I would say use a ServletContextListener if the structures you are creating will be shared by several of your Servlets. That way the init is finished before any of your Servlets are created. Load-on-startup always feels like a bit of a hack to me ;) Just my 2c Steve wrote: where you define your servlet in web.xml add load-on-startup1/load- on-startup servlet servlet-nameMyAppServiceImpl/servlet-name servlet-classmy.package.app.MyAppServiceImpl/servlet-class load-on-startup1/load-on-startup /servlet On Jun 10, 6:29 pm, Jamie jamiesharbor-sou...@yahoo.com wrote: You might try using the servlet configuration 'load-on-startup' setting in your web.xml servlet definition. You could also define your own base class and derive your servlets from that so you at least have the code in one place... Jamie. --- Search for analog and digital television broadcast antennas in your area:http://www.antennamap.com/ --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: unused code in compiled javascript
Actually HashMap and many of the Collections classes /are/ used in that simple
bit on code.
The Widget classes and Event management make heavy use of the Collections
classes. RootPanel alone
uses a HashMap, and HashSet (which in turn use AbstractSet, etc.), RootPanel
also uses the Window
class with uses ArrayList and Collections.
So basically by using RootPanel.get().add() you've effectively made use of a
large chunk of the
Collections classes, parts of the Event system, etc.
The compiler is fairly good at removing unused code, but theres only so far it
can go. The fact is:
in a fairly complex GWT application you're likely to be using that code anyways.
I assume you're compressing your compiled code before shipping it out to the
browser, and setting
the cache headers correctly, since once the user has the code (the .cache.*
files) they never need
to download them again (the name will change if the content of the file is
changed).
Hope that explains the behavior a bit ;)
// J
Vitali Lovich wrote:
The GWT compiler is supposed to remove all unused code. If you believe
that there's code in there that is unused, or can be removed, I would
recommend filing a bug. Hopefully a GWT developer would be able to
provide more information about this particular question.
On Sun, Apr 26, 2009 at 5:03 PM, zbo zachary.bo...@gmail.com
mailto:zachary.bo...@gmail.com wrote:
Hello,
I am working on reducing the compiled js size of a relatively
complex GWT application. I've been looking at the detailed output of
the compile process, and find quite a few blocks of code that seem to
be included no matter what. To test things and get a better
understanding of the GWT compile process, I build a trivial GWT app:
onModuleLoad() {
RootPanel.get().add(new Label(placeholder);
}
Detailed output of this app was approximately 105k in size, and
filled with code I would expect (management of GWTEvents, onLoad
methods, String handling, etc) but also a lot of code that I wouldn't
expect (Hashmap, HashSet, AbstractSet, Set, Collections, etc.) My
question - is this entirely necessary, and if not, how do I avoid
having all of this code included a final compile of a real app?
-Z
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Re: Information on the GWT1.6 Compared with GWT1.5
On the surface, a Handler is just a Listener, but with only 1 event method. Event Handlers also don't have a removeOnClickHandler method, instead the add method returns a registration object that can be used to de-register that handler. Underneath, Handlers are a very different beast. All of the Handlers for a specific Widget are registered with the same HandlerManager, thus no more needs for a ClickListenerCollection and a MouseListenerCollection and a KeyboardListenerCollection, etc. The HandlerManager will also manage any Handlers and Events that you invent and want to add to the Widget. On top of that, DOM events (click, mouse, keyboard, etc) are handled specially and only sinkEvents when the related handler is added. The result of this uniform event mechanism is that the amount of code GWT generates is a lot less, and consumes less memory than the old Listener mechanism. More detail available on my blog: http://lemnik.wordpress.com/2009/03/04/gwts-new-event-model-handlers-in-gwt-16/ http://lemnik.wordpress.com/2009/03/12/using-event-handlers-in-gwt-16/ Hope that helps a bit. //J Ved wrote: Hi, I have a query regarding the listners which are exposed by GWT1.6 API for the widgets Comparing the same with GWT 1.5 I have seen a drastic change in the listner API exposed by the GWT 1.6 for Eg: addClickListner is not present in GWT1.6 it has addClickHandler Can i know why these listeners are deprecated and what advantage i get it from Using 1.6 rather than GWT 1.5 Thanks Regards, Ved Prakash Kamishetty --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Interesting issue for experts!
As far as I know it won't complain (doesn't complain when I use annotations from EoD SQL). The best way to find out is write a test class with some annotations and try compile it ;) //J djd wrote: For hibernate entity beans, can I use hibernate's specific annotations? I never actually tried it, since we've mapped them using .hbm.xml config files. But will GWT ignore the annotations or, better said, how do I map entity beans using annotations without making GWT scream about the imports? :) On Mar 17, 5:41 am, Ian Petersen ispet...@gmail.com wrote: On Mon, Mar 16, 2009 at 7:29 PM, Joe Cole profilercorporat...@gmail.com wrote: Even better: make the error message in gwt be super-specific. That way people won't need to go to the FAQ. Error: The class X was not in one of the gwt-compilation folders (a,b,c). Since gwt only compiles code below these folders into javascript your class was removed from compilation. Your options are to: 1) provide a replacement class (seehttp://faq) , 2) rewrite the functionality you need to a reachable class or 3) move the class into one of the folders reachable by your modules. That sounds like a good idea, but it seems like lots of people are already not reading the existing error messages. Adding more text is only going to create more problems, I think. Ian --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Different sessionIDs in one application
Hi Markus, Is it possible the SessionId Cookie hasn't been sent to the client when the second method is invoked? You may need to force the Server to create the HttpSession object and send the Cookie in your host page (or before you reach it). Basically any call to HttpServletRequest.getSession() should create the session and assign an ID to it, but until the response has been sent to the client, the browser won't have knowledge of that Session. Let me know if thats not the problem. //J Markus wrote: Hello I have following problem with my application. If I make generally rpc calls during RemoteServiceServlet all is fine, if I use: this.getThreadLocalRequest().getSession().getId() I allways get the same sessionID back and I can work with it. No I have following case. I added a long polling mechanism to get actual data from the server. Exactly I have a RemoteServiceServlet which is waiting for data. Now the problem: If I make another rpc call to another RemoteServiceServlet, during the long polling servlet is running, I get on that second Servlet, a new sessionID if I do this.getThreadLocalRequest().getSession().getId(). How can it be, that I get 2 different sessionIDs with the same application? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Different sessionIDs in one application
I think the problem here is specific to the long polling case mixed with RPC. If the first call that requests a Session is in the long polling method, while the second call (to the other method) occurs before the long polling method has completed: the browser won't have received the Session ID cookie from the first request (since it hasn't returned yet). You could test this by using HttpSession.isNew() in each of the Servlet methods to see if both requests have created their own session. Putting a dummy request for a session into a Servlet or JSP when the host page is served establishes the session with the client, since the page content will have a Cookie header containing the Session ID the browser needs to send to all the RPC methods. It's not the client code setting the Cookie, but rather the Servlet Container setting the session ID with the client so that the client will request that Session in subsequent invocations. Hope that explains my thinking a bit better. //J djd wrote: So just making a dummy call is enough? i.e. 2 method calls one after the other (in client code) will result in different IDs? More, since this mechanism is sevlet specific, client code shouldn't set any cookies, by hand at least. On Mar 16, 9:10 am, Jason Morris lem...@gmail.com wrote: Hi Markus, Is it possible the SessionId Cookie hasn't been sent to the client when the second method is invoked? You may need to force the Server to create the HttpSession object and send the Cookie in your host page (or before you reach it). Basically any call to HttpServletRequest.getSession() should create the session and assign an ID to it, but until the response has been sent to the client, the browser won't have knowledge of that Session. Let me know if thats not the problem. //J Markus wrote: Hello I have following problem with my application. If I make generally rpc calls during RemoteServiceServlet all is fine, if I use: this.getThreadLocalRequest().getSession().getId() I allways get the same sessionID back and I can work with it. No I have following case. I added a long polling mechanism to get actual data from the server. Exactly I have a RemoteServiceServlet which is waiting for data. Now the problem: If I make another rpc call to another RemoteServiceServlet, during the long polling servlet is running, I get on that second Servlet, a new sessionID if I do this.getThreadLocalRequest().getSession().getId(). How can it be, that I get 2 different sessionIDs with the same application? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: H-Panel mouse click
Unfortunately there is no quick way to do this, you will need to search for the
element by hand.
private int indexOf(final Element target) {
final TableElement table = TableElement.as(getElement());
final NodeListTableRowElement rows = table.getRows();
final NodeListTableCellElement cells = rows.getItem(0).getCells();
final int length = cells.getLength();
for(int i = 0; i length; i++) {
if(cells.getItem(i).isOrHasChild(target)) {
return i;
}
}
return -1;
}
Hope that helps a bit.
//J
Riyaz Mansoor wrote:
I have attached a ClickHandler to a HorizontalPanel and it recieves
events.
How can I find the index of the cell that generated the event?
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Re: gwt hosted mode in netbeans 6.5
If you run the project in debug mode you'll get GWT hosted mode automatically. Bare in mind 2 additional things that netbeans will do: 1) start the debugger as well (which I find very useful) 2) start your real external Tomcat instance as the server Hope that helps. //J mibtar wrote: is there a way to use hosted mode in netbeans 6.5? like in eclipse. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: How do you remove a handler?
Hi Ian All of the add*Handler methods return a HandlerRegistration object, you keep a reference to it, and then invoke HandlerRegistration.removeHandler() when you want to remove it. I wasn't to sure of whether I liked it or not at first, but it does make automated removal of Handlers on auto-generated structures (populated from some external source) a lot easier, since you can just store all the HandlerRegistrations. Cheers, Jason. Ian Bambury wrote: History lets you add one, but how do I get rid of it? Ta, Ian http://examples.roughian.com --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: GWT on NetBeans 6.5 / gwt4nb
Heya,
Just a heads-up. I change the build.xml in the project root directory, NOT the
build-impl or
build-gwt files, that way GWT4NB never overwrites the changes.
I'm busy working to get this patch merged into the GWT4NB project.
If your normal build.xml is being overwritten, something is wrong. ;)
Cheers,
Jason.
Kevin Tarn wrote:
You have to unjar GWT4NB to a directory. Modify build.xml in extracted
directory, and then jar the whole package back. Reinstall your revised
GWT4NB in NetBeans.
Kevin
On Fri, Feb 27, 2009 at 12:13 AM, Selfish Gene ravurib...@gmail.com
mailto:ravurib...@gmail.com wrote:
Any changes to build.xml are overwritten by GWT4NB.
Are there any entries I can add to gwt.properties that might help me
solve this problem.
On Feb 26, 9:37 am, Kevin Tarn kevn.t...@gmail.com
mailto:kevn.t...@gmail.com wrote:
Jason's blog did a good
job:http://lemnik.wordpress.com/2008/07/27/fixing-compilation-in-gwt4nb/
Kevin
On Thu, Feb 26, 2009 at 11:32 PM, Selfish Gene
ravurib...@gmail.com mailto:ravurib...@gmail.com wrote:
I am trying to migrate from eclipse to Netbeans as I felt 6.5 more
compelling and the migration is definitely not an easy task. I am
seeing lot of OutofMemory errors. I modified project.properties and
used jvmargs=-Xmx512m for GWT compiler, shell. But It still
breaks
some place.
---
---
--
Starting GlassFish V3
GlassFish V3 Start Failed
C:\My Documents\NetBeansProjects\Nodal\ShadowSettlements\nbproject
\build-gwt.xml:33: Deployment error:
GlassFish V3 Start Failed
See the server log for details.
BUILD FAILED (total time: 2 minutes 4
---
---
--
The target in build.xml that breaks
---
---
--
target name=debug description=Debug project in IDE.
depends=init,compile,compile-jsps,-do-compile-single-jsp,dist
if=netbeans.home
nbdeploy debugmode=true
clientUrlPart=${client.urlPart}/
antcall target=connect-debugger/
antcall target=debug-connect-gwt-shell/
/target
---
---
--
Any suggestions would be greatly appreciated.
Thanks
-R
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Re: json date
The JSON spec actually has no way of representing a date. There are several possible methods (and hacks) that allow you to ship dates over JSON (though none of them are really perfect). I would personally recommend sending dates as UTC numbers, since that way you don't have to hack the JSON encoding / decoding process to get it to work, the disadvantage being you loose readability of your data (as plain text). Hope that helps a bit. //J sutarsa giri wrote: dear all, I'm trying to use php as beckend for my gwt application( actually I'm not really confortable with gwt+json, but I don't have choice ), There is a thing that make me confuse. there is JSONString,JSONNumber,JSONObject,JSONBoolean, but why there is no built in JSONDate? did anyone know why?, i'm also try to googling about json date. but it's lead me to another confusion. any pointer woud be helped thx and regards, Gede sutarsa --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: 1-2 minute build time in netbeans with nb4gwt
Not sure why it would take less time on the command line (memory possibly). I blogged a nice little solution to gwt4nb's build problems here: http://lemnik.wordpress.com/2008/07/27/fixing-compilation-in-gwt4nb/ It's a chunk of ant that you can drop in your normal build.xml to give the GWT compiler more memory, and so that it only runs when you change client side code. I've actually got a few patches for gwt4nb, but because of some weirdness around the Editor Hints I can't deploy it at the moment :( Hope the build script helps in the mean-time. //J mebassett wrote: Howdy folks I'm pretty new to GWT, and most everything is going fine for me...but trying to build the project in netbeans (using the nb4gwt plugin) takes forever. Even the basic project that's built with the wizard takes well over a minute to build. This really kills productivity. I can build a GWT app in eclipse or through terminal in much less time...why is netbeans taking so long? has anyone else had this problem? am I doing something wrong? any tips? Thanks. :) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Async on the client side, what about the server side?
On the server side there is generally a pool of threads held by the server. Thus a single session (in the JSESSIONID sense of Session) may involve any number of threads from the pool. Each request is processed on a single thread taken from the pool. So to answer your question: chances are it won't start a new thread, but the 2 can execute at the same time. Just bare in mind that the /browser/ generally limits you to 2 concurrent connections per server. Hope that explains things a bit ;) // J ralph wrote: I understand that the client side is asynchroneous, which means that I can call a new function from the client side to the server side without waiting for the previous function to be completed. Now how does this work on the server side? I thought that there was only a single thread per session on the server side. But let's say I call a function getEvent() and hang it on the server to produce the comet effect (long polling) and try to call another function meanwhile, what would happen on the server side? Would the next call hang till the first one finishes? would it open a new thread? Thanks. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Async on the client side, what about the server side?
Synchronization on the server depends on the resources you want to protect
access to. Synchronizing
a method in RemoteServiceSerlvet is a /very/ bad idea, since it ensures that
only one user can use
that method at a time.
You also can't assume that if you take up one of the browsers connections that
there will only be
one left, rather you should assume you have only 2 connections to deal with,
but don't rely on it
for any code logic (since some browsers may allow more).
The code you posted doesn't ensure that one connection will always be taken by
getEvents, although
single-threaded, that code is subject to a standard race-condition with regards
to the browser
Connections. Other code attempting a server connection may e given the
opportunity to grab the
connection after one call to getEvents() returns and before onSuccess() is
called.
To run a comet style process (or a timed comet process) you would rather start
the next comet
request in the onSuccess /and/ onFailure methods of the AsyncCallback. If you
need to wait a
specified delay before sending the next requests, use a Timer.
I would also recommend looking over:
http://code.google.com/docreader/#p=google-web-toolkit-doc-1-5s=google-web-toolkit-doc-1-5t=ReleaseNotes_1_5_Rpc
Returning the Request object so that an exiting comet request can be canceled
if you need to send
more data.
Not quite sure exactly what you're looking for, if I'm on the wrong track let
me know.
Hope this is helping.
//J
ralph wrote:
In that case does that mean that I should synchronize on the server
side? And what about if I have one connection that it is continuously
recycled, does that mean that having only one connection left I can
confidently say that the logic is synchronous on the server side?
And does this code below ensure that the connection will always be
taken by getEvents.
getEvents(new AsyncCallback() {
onSuccess() {
getEvents(this);
}
}
Thanks
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Re: Library without source code
If GWT translated to an intermediate form, it would be so close to source-code that it really wouldn't matter. Besides that, GWT compiles from source-code to source-code (although it's JavaScript source code). I've seldom worked with a commercial enterprise product that I can't get the source-code for, especially not an API product. I would say this is more a legal issue than one related to the way GWT (or any other compiler) does things. You could always obfuscate the Java source code before JARing it up, it offers about as much security as GWT does with it's Obfuscated JavaScript output. Just my 2c worth. //J Mike wrote: Dear all, Is it possible to create a GWT-library that can be included in other GWT projects *without* giving away the source code? From what i understand, currently both the sources and the .class files should be included in a library. Including the sources can be a problem wrt intellectual property if the logic is nontrivial and of substantial size. Why doesn't GWT translate into some intermediate form, or just use javascript? Bye, Mike --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Getting an Error No source code is available for type java.util.ResourceBundle; while compilation.
java.util.ResourceBundle is not available to client side GWT code. I would advise sticking to the Constants interface, since it has the advantage that the bundle data will be inlined into your JavaScript. There will be no properties files loaded at runtime, and no Hashtable like lookup when a String is needed. Constants have the added advantage of being able to return various data-types, which are all checked for validity at compile time. Even if ResourceBundle was available to GWT, it would be a waste of space and reduce the performance of your application. That said, you can make use of ConstantsWithLookup which is a combination between Constants and ResourceBundle. Hope that helps. //J Suresh wrote: Hi, I'm trying to develop a module with GWT and integrate it with exisiting project in JS. My Page contains lot of list boxes for which i have to load the values from properties file. If i use com.google.gwt.i18n.client.Constants i have to write lot of getter methods for each values with interface. Instead of this i'm planning to use ResourceBundle but if i use Resourcebundle i'm gettign the following error during compilation No source code is available for type java.util.ResourceBundle;. What needs to be done to resolve this error? Regards, Suresh --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: how to catch the double click event
It doesn't matter that they have the same value, they are returned from 2 different fields in Event: if(event.getButton() == Event.BUTTON_RIGHT) if(event.getTypeInt() == Event.ONDBLCLICK) Hope that helps //J arun wrote: no...actually i m mentioning about event.BUTTON_RIGHT and event.ONDBLCLICK Both having same value i.e.2 and i m using both in my application. On Feb 4, 12:38 pm, Litty Preeth preeth.h...@gmail.com wrote: No the constants for both are different... Event.ONCLICK and Event. ONDBLCLICK On Wed, Feb 4, 2009 at 12:44 PM, arun theeperfection...@gmail.com wrote: i have a requirement to catch the double click event. i am catching right click too. but both event are getting mixed up. only right click is working fine. Thsi may be because both event have same constant field values. is ther eany way to distinguish these two? Any help would be appreciated.- Hide quoted text - - Show quoted text - --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: How do you retrieve the output or XML from the AJAX page?
Hi there,
I think what you are looking for is the getText() method of the Response
object (the one that gets
passed into the onResponseReceived method).
To convert the String returned into an XML DOM object, you can use the classes
in
com.google.gwt.xml.client:
public void onResponseReceived(Request request, Response response) {
Document dom = XMLParser.parse(response.getText());
// work with the Documnet here
}
Hope this was what you were looking for?
//J
ProtoLD wrote:
I have some code which works fine:
RequestBuilder rb = new RequestBuilder(RequestBuilder.POST, http://
localhost:8500/test.cfm);
rb.setHeader(Content-Type,
application/x-www-form-urlencoded);
try {
Request response = rb.sendRequest(stuff, new
RequestCallback()
{
public void onError(Request request, Throwable exception) {
}
public void onResponseReceived(Request request, Response
response)
{
}
});
}
catch (RequestException e) {
Window.alert(Failed to send the request: + e.getMessage());
}
submitProject.addClickListener(new ClickListener(){
public void onClick(Widget w) {
RequestBuilder.Method method=RequestBuilder.GET;
final String url1=http://localhost:8500/test.cfm;;
Window.alert(url1);
RequestBuilder rb=new RequestBuilder(method, url1);
try {
rb.sendRequest(null, new RequestCallback() {
public void onResponseReceived(Request request, Response
response) {
Window.alert(+response.getStatusCode());
}
public void onError(Request arg0, Throwable arg1) {
Window.alert(error);
}
});
} catch (RequestException e) {
} } });
However, I can't figure out any methods that return the actual XML
response text! When trying to turn the request into a string, I quite
obviously get nothing of use. I have a simple page setup that only
has some text on it (the number 2) so how would I return that?
After figuring that out I can pretty much finish this project I'm
working on :p
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Re: Removing Radio Buttons
Heya,
I think your problem is that you are not either:
1) clearing the grid before re-populating it
2) removing the last row after a remove has been performed
RadioButton rb = new MyRadioButton(group, radioButtonText);
rb.addClickListener(listener);
scrollBoxGrid.setWidget(i, 0, rb);
except that the last row is now 1 less than it used to be. So I would say just
invoking:
scrollBoxGrid.clear();
before populating it should do the trick ;)
Hope that helps,
//J
fatjack1...@googlemail.com wrote:
Hi,
I have a button which allows the user to remove an item from the
system by selecting a Radio Button and pressing 'Remove'. The system
then deletes the item from the database and updates the list of radio
buttons i.e. it removes the radio button that was selected for
deletion. However, I have a bug in that the system does not remove the
radio button completely, it just moves everything below the removed
item 'up'. For example:
Item1
Item2
Item3
Item4
If we delete Item2, item2 disappears, it moves item3 and item4 up so
we have a list that looks like this:
Item1
Item3
Item4
Item4
So item4 appears twice. I need to obviously remove the bottom radio
button when an item is deleted but im a little stuck on how to this,
with the way I structures the code. Please can someone offer a
soluton?
Here is my code:
//Remove Item
removeItemButton.addClickListener(new ClickListener() {
public void onClick(Widget sender) {
boolean msg = Window.confirm(Are you sure you wish to
remove
+ changedRadioValue + from the database?);
if (msg = true){
String removeData = DELETE FROM
catering.items_table WHERE
itemName = ' + changedRadioValue + ';
ServerService rpc = new ServerService();
rpc.removeItem(removeData, callback2);
}
}
});
AsyncCallback callback2 = new AsyncCallback()
{
public void onFailure(Throwable caught)
{
updateItemsRootPanel.add(new HTML(Failed: +
caught.getMessage()));
}
public void onSuccess(Object result)
{
Window.alert(changedRadioValue + was successfully removed
from the database.);
getStatusDataFromServer();
}
};
ClickListener listener = new ClickListener()
{
public void onClick(Widget sender)
{
changedRadioValue = MyRadioButton.getCurrentText();;
}
};
private void getStatusDataFromServer(){
ServerService.getInstance().getStatusData(
new ServerStatsUpdater());
}
//inner class setting up the radio buttons
class ServerStatsUpdater extends AbstractAsyncHandler
{
public void handleFailure(Throwable caught){
}
public void handleSuccess(Object result){
ServerSQLData data = (ServerSQLData) result;
for (int i = 0; idata.itemNameArrayList.size();i++){
radioButtonText =
data.itemNameArrayList.get(i).toString();
RadioButton rb = new MyRadioButton(group,
radioButtonText);
rb.addClickListener(listener);
scrollBoxGrid.setWidget(i, 0, rb);
}
for (int i = 0;
idata.itemQuantityArrayList.size();i++){
Label quantityInStock = new Label();
quantityInStock.setText(+
data.itemQuantityArrayList.get(i).toString());
scrollBoxGrid.setWidget(i, 2, quantityInStock);
}
}
}
Any help much appreciated.
Regards,
Jack
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Re: random vertical scroll bar
Have you tried:
Window.setMargin(0);
Window.enableScrolling(false);
Which will remove the default padding the browser puts around the document, and
disables scrolling
of the document as well (ScrollPanel's will still work though ;) )
Hope that helps
//J
JohnMudd wrote:
The following code produces a vertical scroll bar (on the right side)
even though the panel size doesn't exceed the window size. I'm using
ver 1.5.3 in shell mode.
The scroll bar does not always appear. If I press Refresh repeatedly
then I will see the scroll bar come and go. There's some randomness
to this problem.
The scroll bar appears even when I reduce the root window size from
100% height to 95% height. At 94% height I still see the root width
toggle randomly but the scroll bar does not appear. Down around 90%
height there is no problem.
The layout also has problems in compile mode with Firefox 3 also. But
after about 5 refreshes the problems go away and I get an accurate
layout.
Is this a known problem?
John
package com.mudd.client;
import com.google.gwt.core.client.*;
import com.google.gwt.user.client.ui.*;
import com.google.gwt.user.client.*;
public class panelSizeDemo implements EntryPoint {
public void onModuleLoad() {
try {
main();
}
catch (Exception e) {
Window.alert(General Error:\n + e);
}
}
static RootPanel rootPanel = RootPanel.get();
static HorizontalPanel basePanel = new HorizontalPanel();
public void main() {
rootPanel.setSize(100%, 100%); // Even if h=100.0% or as low
as 95%
rootPanel.add(basePanel);
basePanel.setBorderWidth(30);
basePanel.setSize(100%, 100%);
basePanel.add(new Label(root: + rootPanel.getOffsetWidth()+
, + rootPanel.getOffsetHeight()));
}
}
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Re: Threaded Servlet
Actually most containers pool their processor threads in order to conserve and regulate resources. The RemoteServiceServlet in GWT simply decodes the response and invokes the method which the request relates to. Theres no magic or rocket science going on here. I don't know what tests you've run, but they're obviously giving you some skew results. That said, a single browser will generally only allow 2 concurrent connections to the server. If your tests ran in your browser, what you're likely seeing is this limitation. Hope that helps a bit. Take a look at the RemoteServiceServlet and RPC code to see how it works otherwise. stephen.sm...@paretopartners.com wrote: I never said it cretaed multiple instances, simply a new thread per request. On Jan 23, 4:30 pm, Shawn Pearce s...@google.com wrote: On Fri, Jan 23, 2009 at 08:17, stephen.sm...@paretopartners.com stephen.sm...@paretopartners.com wrote: Standard servlets create a new thread per request but from a few simple test i have run this appears not to be the case with GWT. *Wrong*. Standard servlets create *one* instance per application container. Multiple threads can be calling the servlet at once. Why is this and is there any way to do this other than explicitly creating a new thread at each method my service exposes. Because GWT is following the standard servlet conventions... it is after all running a standard servlet container (Tomcat) in its hosted mode debugging tool. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Threaded Servlet
I tried reproducing your test to see what you were getting. I found the
behavior when I ran the code
in Hosted Mode and executed serverMethod() /twice/ before executing
anotherMethod() (it didn't
matter how many Hosted Browsers I had open).
When running the same test in real browsers (I used Firefox and Konqueror) the
behavior was
substantially different.
Like I said, browsers generally only allow for 2 open connections per server.
If you invoke a
connection hogging method twice, you have no more connections to invoke a
different method. That
said, this is a strictly client side issue, GWT's RemoteServiceServlet is not
limiting you to a
single Thread.
Try the same test with a normal HttpServlet and a RequestBuilder, you'll see
the same results as you
do with RPC.
stephen.sm...@paretopartners.com wrote:
@shawn
Thats ok :)
@jason
Well these Tests are very basic. i create an app with a simple rpc
call to the server that does something like this:
public boolean serverMethod() {
for (;;) {
if (false) {
break;
}
}
return true;
}
public boolean anotherMethod() {
return true;
}
As you would expect, callingserverMethod() creates an infinite loop
tying up that thread.
then i opened up a second, seperate browser and called anotherMethod
().
result: Nothing. Not a sausage :)
So id say my results are pretty solid. 1 single lonely thread :(
On Jan 27, 3:17 pm, Shawn Pearce s...@google.com wrote:
On Tue, Jan 27, 2009 at 01:42, stephen.sm...@paretopartners.com
stephen.sm...@paretopartners.com wrote:
I never said it cretaed multiple instances, simply a new thread per
request.
*sigh*. I must not have had enough coffee in the morning before replying to
your post. I read thread as instance in your original post. Sorry.
On Jan 23, 4:30 pm, Shawn Pearce s...@google.com wrote:
On Fri, Jan 23, 2009 at 08:17, stephen.sm...@paretopartners.com
stephen.sm...@paretopartners.com wrote:
Standard servlets create a new thread per request but from a few
simple test i have run this appears not to be the case with GWT.
Like what everyone else has already said; each concurrent request runs on
its own thread, but that thread isn't necessarily new.
Most containers recycle threads as thread spin-up/shutdown are relatively
expensive operations. Pooling threads and recycling them across requests
reduces the per-request overheads imposed by the container, allowing
applications to use a larger percentage of the CPU, and the per-request
latency target the developer is shooting for. E.g. in my latest GWT based
application, I was trying to hit 200 ms latency. The more of that time
that is available to the application, the more useful work I can do within
that window.
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Re: HashMap difference between Host mode and Web mode
The get method defined in Map accepts an Object as the key, it doesn't enforce the generic constraint since you are not modifying the contents of the Map (and thus supposedly not doing anything dangerous). Lothar Kimmeringer wrote: Francisco schrieb: HashMapString, Integer map = new HashMapString, Integer(); OtherStringClass otherTestString = new OtherStringClass(testString); [...] Integer fromOhter = map.get(otherTestString); How can this compile? OtherStringClass can't be derived from java.lang.String and isn't in your code. Regards, Lothar --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: problem in parsing XML
It's not really a GWT related question, but heres what you're looking for:
final DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
final DocumentBuilder builder = dbf.newDocumentBuilder();
final Document doc = builder.parse(new
ByteArrayInputStream(xml.getBytes(UTF-8)));
The String parameter accepted from InputSource is a systemId (generally a URI
of sorts pointing to
the XML file).
Hope this helps.
javaz wrote:
hi everyone ,
i got an error while running the below code in the server side .Could
anyone please help me in sorting out the solution to this error?
here is the code:
public boolean saveEmployeeInfo(String xml) {
try{
InputSource s = new InputSource(new
String(xml));//xml is the xml
document
DocumentBuilderFactory dbf =
DocumentBuilderFactory.newInstance
();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = (Document)db.parse(s);
doc.getDocumentElement().normalize();
System.out.println(Root element +
doc.getDocumentElement
().getNodeName());
}catch(Exception e){
e.printStackTrace();
}
here is the error:
java.net.MalformedURLException:
no protocol: EmployeeRegistrationBranchf/BranchNamefffgf/
NameDepartmentgfg/DepartmentDesignatonfdg/
DesignatonJoinedDatefdg/JoinedDateDateofBirthvgfsdg/
DateofBirth/EmployeeRegistration
at java.net.URL.init(Unknown Source)
at java.net.URL.init(Unknown Source)
at java.net.URL.init(Unknown Source)
at
com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity
(Unknown Source)
at
com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion
(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse
(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse
(Unknown Source)
at np.com.rts.hris.server.HRISServiceImpl.saveEmployeeInfo
(HRISServiceImpl.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse
(RPC.java:527)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall
(RemoteServiceServlet.java:164)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost
(RemoteServiceServlet.java:86)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at com.google.gwt.dev.shell.GWTShellServlet.service
(GWTShellServlet.java:289)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext
(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal
(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext
(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext
(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext
(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext
(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:520)
at
Re: Performance overhead of virtual methods
nathan.r.matth...@googlemail.com wrote: Hi GWTers I'm writing some performance sensitive code for GWT. I'm wondering how GWT compiles virtual functions to JavaScript. What's the associated performance overhead? Obviously I'd like to use proper polymorphism but if there's a significant performance overhead it may be worth re- factoring various parts of the code-base. Regards, Nathan Hi Nathan, Someone else can correct me if I'm wrong, but after taking a look at the generated code, it seems that virtual methods shouldn't incur any additional performance overhead in GWT. Basically the bottom level method is given the top-level declared name in each object instance, thus the lookup expense is the same as that of a non-virtual method. Like I said, if I'm wrong on this, someone should correct me. ;) Cheers, Jason. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Proxy class generation
Madhu CM wrote: Hi all, I am new to GWT, and i like the way its been implemented. But i am struck up with something I have developed sample application just to do RPC. when i do GWT.create() . where will be the proxy class generated ? is it done dynamically?dynamically create object for Async?? please explain about this . Thanks, The Proxy class is generated at compile time through whats known as Deferred Binding. Take a look here for more information about GWT.create(...): http://code.google.com/docreader/#p=google-web-toolkit-doc-1-5s=google-web-toolkit-doc-1-5t=DevGuideDeferredBinding Basically the GWT.create(...) method is used to run a bit of special code during the compilation which can generate additional code. It's also using in GWT localization, ImageBundles and a few other places. It's not a runtime method (it doesn't exist at runtime). Hope that helps. Jason. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: What am I misunderstanding about the event model?
The GWT event model is a close relation of the standard Java event model. The problem with the standard DOM EventListeners is that only one listener can be attached to an Element. The other problem is that a custom Widget may be required to listen for a sequence of low-level events in order to trigger a single high-level event (think MOUSEDOWN/UP/MOVE in relation to itemDraggedAndDropped()). So you hide the low-level events within Widget classes, which when they receive the event can trigger the collection of ClickListeners / MouseListeners / MyFancyListenerNumber3. If you are extending the classes over and over again, adding your double-click behavior to each one in it's onBrowserEvent method, you're doing it wrong. The correct way is to extend once, and allow for adding any additional listeners (double-click, keyboard, etc.) to the extended class (which should trigger them in it's onBrowserEvent method). This way the event handling logic remains separated from the Widget itself. Also bare in mind Composite style classes (like a TabPanel) that want to turn a Click event on a tab into onBeforeTabSelected and onTabSelected for it's TabListeners. Hope that helps a bit. David H. Cook wrote: The more code I implement and the more event-related APIs I look at in GWT, the more confused I get. After looking at complete examples about 'listeners' on website such as: http://examples.roughian.com/index.htm#Listeners~Summary or posts in this group, I conclude that the most general is an 'EventListener', because then I can get at ANY/ALL events that I might be interested in, as it's method gets 'Event e' as an input param. But, what seems to me like a real NEGATIVE is that I must 'extend' (sub-class) an object to use EventListener, right? Now, if I only care about a 'click', then I do NOT need to extend, because there are 'clicklisteners', which listen for just ONE event type...'click'. But, if I want, say, 'double-click', well, there are NOT any 'double-click' listeners, so it seems that I'll need to use the more general EventListener. That would be reasonable/acceptable if there was just ONE object that I wanted/needed to extend in a given app. But, let's say, I care about 'doubleclicks' from 3 different objects in the same app...anchors, tabs, and images. (Maybe not the best examples, but bear with me.) So, it seems that now I need to extend three objects, so I'll need 3 java classes (and thus, ...3 FILES...one class per file). [Some posts/examples mention 'widget builders' as a separate class of developer. But, I don't want to build new 'widgets'... I just want a write a simple app. Somehow, the APIs seem to be making things unnecessarily 'complex', when I compare this to how easy it was to implement events in javascript language (before I started using GWT). And, its beginning to seem like the designers of the event-model/event-apis in GWT might have miss-designed the APIs?! (I wasn't around at the beginning, so I don't know how the event-APIs looked in version 1.00.) Both the author of roughian website and other posters all seem to bemoan this need to extend, but all say it is necessary. For example, roughian says: [Notes: This is something you should only use if you are subclassing a widget - it's not much use otherwise, you can't addEventListener() to anything I'm aware of. So, as a builder of widgets, you'd use this to pick up events and use them in ways that you can't do with the ordinarily supported event interfaces] Clearly, I (and others?) must all be missing something. Where have I gone wrong? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: How to forward in GWT?
Window.Location.assign(String url) Should do what you're looking for. crnl...@gmail.com wrote: I have a problem when creating forward in different apps in GWT. I tryed to implement it by using method WIndow.Location.replace (String url), But by this way I can't back to History. Window.open() may not be use because of Refusing by most of browers. Is there another method to implement forwarding? Anybody help? Thanks! --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Clickable text
You could use myLabel.addStyleName(Hyperlink) to style it like a hyperlink
with CSS.
Smith wrote:
Thanks, Kevin. How about myLabel.addClickListener(ClickListener
listener) ?
Also,is there a disadvantage with making labels clickable? The user
wouldn't know if that text is clickable unless you mention that
explicitly. I mean if you bring the mouse over it, would it give any
indication that it's clickable?
Thanks,
On Dec 15, 7:20 am, Kevin Tarn kevn.t...@gmail.com wrote:
You can inherit Label and sink ONCLICK event by add below line in
constructor of inherited class.
void InheritLabelConstructor(String text) {
super(text);
sinkEvents(Event.ONCLICK);
}
void onBrowserEvent(Event event) {
super.onBrowserEvent(event);
if (event.getTypeInt() == Event.ONCLICK) {
// do something
}
}
Best
Kevin
On Mon, Dec 15, 2008 at 11:07 PM, Smith smitha.kang...@gmail.com wrote:
All,
Is there a way to add some clickable text into a panel? I am aware of
Hyperlink, but I don't need history support. All I need is to show
another panel when a text is clicked on.
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Re: Server Side Byte Code Obfuscation
The obfuscator should either leave those method alone by default (since they're defined in an outside interface), or you should be able to configure it to leave them alone. Either way, RemoteServiceServlet uses reflection and thus does need the method names intact. You may be able to alter the generated JavaScript code, or config to change the method names there as well, but I'm not sure how you would go about this. Easiest just to leave the method names alone. Magno Machado wrote: Won't it break rpc? Unless your obfuscator keep the names of your services methods, I think RemoteServiceServlet won't find them when you make a RPC call. But I'm not sure about this.. 2008/12/10 Allahbaksh [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] HI Rob and Shawn, Thanks for your reply. I am thinking to use ProGuard.Do you have any other open source alternatives. Please let me know if you have used any other? Regards, Allahbaksh On Dec 9, 9:35 pm, Rob Coops [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: On Tue, Dec 9, 2008 at 5:17 PM, Allahbaksh [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Hi, We are distributing an application. We want to obfuscate the server side code to the client so that they should not reverse engineer the code. Is it works fine? What will happend to servlets? Whether they work fine? Regards, Allahbaksh Hi Allahbaksh, Obfuscating code is not going to stop any determined person from reverse engineering your code, it might make it slightly more difficult but that is about it. The code should still work otherwise the obfuscation failed and you simply broke your own code. In the end any and all code you write can be reversed engineered regardless of obfuscation or any other technique used to make it harder to do so. So in that respect you will have to look at the cost you make obfuscating your code as opposed to the risk you run with someone actually taking the trouble of reverse engineering your code. How much will you loose if someone reverse engineers your code in a week and how much will you loose if it takes them a month... you might very well find that the cost of hiding you code is not worth the money. Regards, Rob --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: FileUpload pbm
A web browser won't allow you to do this, since it would basically allow anyone to pull copies of important files off your hard disk without your permission, this a FileUpload (like input type=file) is a readonly structure from a JavaScript point of view. You can however use flash, or a signed Java Applet to access the file-system and upload the file. Mogoye wrote: Hello, I need to upload a file to my server. Looking to GWT API the only way to do that seems to use FileUpload class associated with a FormPanel. My problem is that I already know the name of the file to upload and don't want to ask to my user to select it on the file system. My 1th idea was to call myFileUpload.setFileName(); but this method does not exist. Is there any other solution to upload a file ? Thx for reading. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Toggle text color in timer
Label lblOfflineLabel = new Label();
Timer offlineLabelTimer;
lblOfflineLabel.addStyleName(OfflineLabel);
lblOfflineLabel.addStyleName(OfflineLabel-blink);
offlineLabelTimer = new Timer() {
private boolean on = true;
public void run() {
if(on = !on) {
lblOfflineLabel.removeStyleName(OfflineLabel-blink);
} else {
lblOfflineLabel.addStyleName(OfflineLabel-blink);
}
}
};
ArunDhaJ wrote:
Hi,
I wanted to make a label to blink, like toggling two colors. I've
implemented a timer to do the same.
How can I know which color has been previously set ?? so that I can
swap with the new color...
//
Label lblOfflineLabel = new Label();
Timer offlineLabelTimer;
lblOfflineLabel.addStyleName(OfflineLabel);
lblOfflineLabel.addStyleName(OfflineLabel-blink);
offlineLabelTimer = new Timer() {
public void run() {
lblOfflineLabel.removeStyleName(OfflineLabel-blink);
}
};
// blink at the rate of 2 second
offlineLabelTimer.scheduleRepeating(2000);
//
How to implement the run logic to toggle the two styles ???...
.OfflineLabel{
color: #FF;
}
.OfflineLabel-blink {
color: #00FF00;
}
Thanks in advance !!!
- ArunDhaJ
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Re: Why it's so slow?
The GWT Compiler does a massive amount of optimization and it does so for each of the browsers. This process takes a lot of time. GWT has it's own browser that runs your Java code with less compilation work (and lets you debug your Java code instead of the generated JavaScript). To access this functionality in Netbeans use Debug Project instead of Run Project. You should also look here: http://lemnik.wordpress.com/2008/07/27/fixing-compilation-in-gwt4nb/ For a patch to the default build.xml thats generated by gwt4nb (it stops the GWT Compiler running when it doesn't need to). Hope that helps. Andrey wrote: Hello, I begin learning GWT and meet with problem of slow building of GWT project :(. I created a new GWT web-project in NetBeans, download a sample addressBook application and adjust it for the project. Building procedure takes about a minute :(. Most of the time is spending after the message: ... Computing all possible rebind results for 'com.acme.client.AddressBookService' ... . So, how is it possible to develop anything with such a speed? Regards, -Andrey --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: @Override causes error when defining anonymous class
The GWT Compiler doesn't like to have @Override on an interface method, if the
method definition
comes from a class it's happy, but if the direct parent declaration is in an
interface it won't compile.
[EMAIL PROTECTED] wrote:
I get the error message in the development shell:
The method onClick(Widget) of type new ClickListener(){} must
override a superclass method
When I do
addClickListener(new ClickListener() {
@Override
public void onClick(Widget sender) { ...
but all is fine if I have
addClickListener(new ClickListener() {
public void onClick(Widget sender) { ...
Why is it wrong to include @Override? Eclipse quick fix puts it
there for me.
Best,
-ken
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Re: Mixing up XMLParser with DOM...
This is something you simply can't do cleanly across all the browsers. The elements returned by the XMLParser are totally different classes to the HTMLParser. The way to do this is to set the innerHTML on an HTML Element object to the value returned from the RequestBuilder. Then you can use the normal Element.getChildNodes() to fetch the DOM objects that were returned from the service. Cristiano wrote: Hello Everyone, How to 'cast' or 'transform' a com.google.gwt.xml.client.Document to a com.google.gwt.dom.client.Document ??? I'm dealing with the requirement of handling DOM elements retrieved by a server (as an HTTP xml/text response), parse them with XMLParser and them into an existing document: I handle the DOM of the current page with com.google.gwt.dom.client.Document and com.google.gwt.user.client.DOM. I handle the HTTP request with the RequestBuilder. I parse them with com.google.gwt.xml.client.XMLParser. However the com.google.gwt.xml.client.XMLParser do return a com.google.gwt.dom.client.Document, and I cannot add it to a com.google.gwt.dom.client.Document because appendChild does not accept as input a com.google.gwt.xml.client.Element: it wants a com.google.gwt.doc.client.Element. Can you help me in find the right direction resolve this (I'm using eclipse)? Thanks, Cristiano --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: best way to test an image file exists?
It's not really that Safari doesn't support it, it just doesn't allow for
XmlHttpRequest objects to
have a Method of anything other that GET / POST. The issue may have actually
been resolved (I'm open
to correction here), but some people are still using versions of Safari with
this problem.
Lothar Kimmeringer wrote:
darkflame schrieb:
oh...it seems GWT dosnt support the Head method only Post / Get :-/
(apperently Saffire dosnt support it)
It's a FAQ here. You can use the protected contructor using an
anonymous inner class:
RequestBuilder builder = new RequestBuilder(HEAD, url) {
/* nothing to override */
};
I'm wondering if HEAD is not supported by Safari, because this
method is implemented by HTTP-servers since the time where one
kilobyte weighted one kilogram.
Regards, Lothar
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Re: Compiling in 1.5.3
You need to switch to using the Java 5 way of declaring Collections (ie: using generics): public ListToolOptions toolList = null; slledru wrote: I am trying to move my app from 1.4 to 1.5.3. I am using ant to build and am getting following warnings and would like to get rid of them. What am I doing wrong? I am using JDK1.6. [java] Scanning source for uses of the deprecated gwt.typeArgs javadoc annotation; please use Java parameterized types instead [java]Type com.sirsidynix.client.request.report.ReportRunInfo [java] Field toolList [java] [WARN] Unable to recognize 'java.util.Listjava.util.List' as a type name (is it fully qualified?) [java] com.google.gwt.core.ext.typeinfo.NotFoundException: Unable to recognize 'java.util.Listjava.util.List' as a type name (is it fully qualified?) [java] at com.google.gwt.core.ext.typeinfo.TypeOracle.parseImpl (TypeOracle.java:892) And in ReportRunInfo, I have: /** * @gwt.typeArgs java.util.Listcom.sirsidynix.client.reports.tools.ToolOptions */ public List toolList = null; --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Mixing up XMLParser with DOM...
GWT's methods of implementing the DOM objects and the XML objects are totally different. The DOM implementation extends JavaScriptObject, whereas the XML objects encapsulate their JavaScriptObject structures. I would advise using the method I suggested, since it'll take a lot less of your time (and be technically a lot safer) than trying to do hackery with GWT's XML package. String responseFromServer = ...; Element domElement = Document.get().createDivElement(); domElement.setInnerHtml(responseFromServer); NodeListNode children = domElement.getChildNodes(); If you need to work with sub-elements of the HTML / XML returned from the server, I would suggest using RPC, or embedding the HTML inside CDATA sections of the returned XML document. If you really feel the need to work with the HTML / XML by hand, you may need to make a copy of the GWT xml / xml.impl packages and expose the underlying JavaScriptObjects that make up the DOM structure (and even then: I'm not sure it'll work). Cristiano wrote: Thank you, And do you know if can find a solution which may works even if only inside a specific browser? On Firefox the underlaying DOM objects tyep are the same if you use an XHTML page and correclty handle the namespaces in the XML of the HTTP response. I'm able to get what I want with javascript on FF, and by the way my gwt solution only need to work on this browser: I need gwt for other purpose than broswser portability. My question may change the into: do you know how to convert elements in XML package to elements in DOM package in Firefox by using GWT? Thnak you again, Cristiano Jason Morris wrote: This is something you simply can't do cleanly across all the browsers. The elements returned by the XMLParser are totally different classes to the HTMLParser. The way to do this is to set the innerHTML on an HTML Element object to the value returned from the RequestBuilder. Then you can use the normal Element.getChildNodes() to fetch the DOM objects that were returned from the service. Cristiano wrote: Hello Everyone, How to 'cast' or 'transform' a com.google.gwt.xml.client.Document to a com.google.gwt.dom.client.Document ??? I'm dealing with the requirement of handling DOM elements retrieved by a server (as an HTTP xml/text response), parse them with XMLParser and them into an existing document: I handle the DOM of the current page with com.google.gwt.dom.client.Document and com.google.gwt.user.client.DOM. I handle the HTTP request with the RequestBuilder. I parse them with com.google.gwt.xml.client.XMLParser. However the com.google.gwt.xml.client.XMLParser do return a com.google.gwt.dom.client.Document, and I cannot add it to a com.google.gwt.dom.client.Document because appendChild does not accept as input a com.google.gwt.xml.client.Element: it wants a com.google.gwt.doc.client.Element. Can you help me in find the right direction resolve this (I'm using eclipse)? Thanks, Cristiano --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: variable argument type in RPC service
I would say: pass the data as an array, and wrap the RPC service on the client
side:
public void doSomething(Object param1, AsyncCallback callback, String...
strings) {
asyncClient.doSomething(param1, strings, callback);
}
If you really need varargs. Bare in mind the expense of varargs in JavaScript
is fairly high (since
it's turned into an Array underneath by the GWT compiler)... A better option is
to just go with the
old 1.4 syntax:
doSomething(param1, new String[] { String 1, String 2 });
although it's the same expense as varargs, it plays nicely with RPC.
Litty Preeth wrote:
Hi all,
Anybody have any idea how to use variable length argument (like
String...) in an RPC service. Coz the corresponding async service
should have AsyncCallback as its last argument. But when we use
variable type argument that should be the last argument of the method.
Thanks,
Litty Preeth
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Re: Socket connection
The only types of connection available to JavaScript in HTTP/S, and then not with Streams of data (data is sent and received as Strings). Therefore GWT can't emulate a true Socket of any sort. If you describe your problem in more detail, perhaps someone can suggest a solution. Pete Kay wrote: Hi Does anyone know of any GWT lib that can do socket connection? Thanks alot in advance for your help. Pete --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: java.lang.ref.* in GoogleWebToolkit ?
You can't use java.lang.ref on the client side, because JavaScript has no notion of weak, soft, or phantom references. You can however use the java.lang.ref package on the server. If you need to release objects on the client side, it is best to do so by hand when they are no longer in use. If you need to also tell the server to release them, use an RPC call of some sort, and have the server release the data when the session expires (if you are not actually storing the data in the session). Garo.Garabedyan wrote: http://garabedyan.wordpress.com/2008/11/18/javalangref-in-googlewebtoolkit/ Is java.lang.ref.* functioning in GWT? I come to an idea that java.lang.ref.* is necessary to enable proper garbage collection while implementing the Observer pattern in Model View Controller. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Hide Popup panel
You should rather encapsulate your context menu logic in a PopupMenu or
ContextMenu class. Something like this may help:
public class ContextMenu extends PopupPanel {
private final ClickListener closeListener = new ClickListener() {
public void onClick(final Widget sender) {
hide();
}
};
private final MouseListener rolloverListener
= new MouseListenerAdapter() {
public void onMouseEnter(final Widget sender) {
for(final Widget widget : items) {
if(widget == sender) {
widget.addStyleDependantName(Hover);
} else {
widget.removeStyleDependantName(Hover);
}
}
}
};
private final VerticalPanel items = new VerticalPanel();
public ContextMenu() {
super(true, false);
setWidget(items);
addStyleName(ContextMenu);
}
public SourcesClickEvents addItem(final String displayText) {
final Label label = new Label(displayText);
label.setStylePrimaryName(ContextMenu-Item);
label.addClickListener(closeListener);
label.addMouseListener(rolloverListener);
items.add(label);
return label;
}
public void show(final Widget parent, final int x, final int y) {
setPopupPositionAndShow(new PositionCallback() {
public void setPosition(
final int width, final int height) {
int px = parent.getAbsoluteLeft() + x;
int py = parent.getAbsoluteTop() + y;
if(px + width Window.getClientWidth()) {
px = Window.getClientWidth() - width;
}
if(py + height Window.getClientHeight()) {
py = Window.getClientHeight() - height;
}
ContextMenu.this.setPosition(px, py);
}
});
}
}
The above class adds Labels with a ClickListener to close the PopupPanel and a
MouseListener to handle rollover (Hover) styles. You can use
addItem(Delete This).addClickListener(new ClickListener() {
public void onClick(Widget sender) {
currentItem.delete();
}
});
to add your actual handling ClickListener to the Labels.
Hope that helps a bit.
ArunDhaJ wrote:
I've tried...
RootPanel.get().remove(sender.getParent().getParent().getParent());
and removed it. But once I remove this way, it gets permanantly
removed and menu doesnt appear once again.
I've even tried
sender.getParent().getParent().getParent().setVisible(false);
the same problem as above persists.. once hidden its not coming up
again...
Regards
ArunDhaJ
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Re: Resizable Popup Panel or DialogBox
I would say take a look at the GWT Mosaic project: http://code.google.com/p/gwt-mosaic/ http://69.20.122.77/gwt-mosaic-current/Showcase.html#CwWindowPanel benw wrote: Is anybody willing to share some example code for a resizable DialogBox or any kind of resizable panel? Thanks, -Ben --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Reading XML file from localhost
, however I really want to develop this
app of mine full GWT-style. Hope you could help me again, thanks.
On Nov 10, 5:58 pm, Jason Morris [EMAIL PROTECTED] wrote:
Heya,
Your basic problem here is that you can't have your XmlParserUtil return a
Document object. The doc field will only be filled in when the async
RequestBuilder request returns and the parser is finished with the XML
string.
By that time, your method has already returned.
The only way to solve this is to create something like a:
public interface CallbackV {
void callback(V value);
}
and have the XmlParserUtil look something more like this:
public class XmlParserUtil {
String url;
Document doc;
public RequestBuilder requestBuilder;
String xmlStr;
public XmlParserUtil(String xmlFileName) {
this.url = xmlFileName;
}
public void getDocument(CallbackDocument callback) {
if(doc != null) {
callback.callback(doc);
return;
}
try {
requestBuilder = new
RequestBuilder(RequestBuilder.GET,url);
requestBuilder.sendRequest(null,new
RequestCallback()
{public void onResponseReceived(Request arg0,
Response arg1) {
xmlStr = arg1.getText();
callback.callback(doc =
XMLParser.parse(xmlStr));
}
public void onError(Request request, Throwable
exception) {
}});
}
catch (RequestException ex) {
GWT.log(ex.getMessage(), ex);
}
}
}
For more information about async problems, it's related to RPC, but
applicable
to the RequestBuilder as well:
http://lemnik.wordpress.com/2008/07/04/gwt-rpc-is-called-aynchronous-...
mives29 wrote:
okay, let me be clear on this, again, my code. (now posting full
reworked source code)
// A composite w/c contains a tree.
public class TreeX extends Composite {
Document doc;
Tree t = new Tree();
int imgUris;
XmlParserUtil xmlParser;
public TreePol() {
TreeItem tItem = getTreeItem();
t.addItem(tItem);
initWidget(t);
}
private TreeItem getTreeItem() {
doc = getDoc();
imgUris = doc.getElementsByTagName(Image).getLength();
TreeItem root = null;
root = new TreeItem(Image Names);
for (int i=0;iimgUris;i++) {
String tmpImgUri =
doc.getElementsByTagName(Image).item(i).getChildNodes().item(1).toString();
root.addItem(tmpImgUri);
}
return root;
}
public Document getDoc() {
xmlParser = new XmlParserUtil(image_uris.xml);
while (doc==null) {
doc = xmlParser.getDocument();
}
return doc;
}
}
//A class that i want to use as a utility class for parsing xml
documents. intended to be reusable
public class XmlParserUtil {
String url;
Document doc;
public RequestBuilder requestBuilder;
String xmlStr;
public XmlParserUtil(String xmlFileName) {
this.url = xmlFileName;
}
public Document getDocument() {
try {
requestBuilder = new
RequestBuilder(RequestBuilder.GET,url);
requestBuilder.sendRequest(null,new RequestCallback()
{public void onResponseReceived(Request arg0, Response
arg1) {
xmlStr = arg1.getText();
doc = XMLParser.parse(xmlStr);
}
public void onError(Request request, Throwable
exception) {
}});
}
catch (RequestException ex) {
GWT.log(ex.getMessage(), ex);
}
return doc;
}
}
//my entrypoint's onModuleLoad(), which adds the various custom
widgets i made to a tab panel
public void onModuleLoad() {
RichTextAreaX1 rtaPol = new RichTextAreaX1();
PictureViewer imgBrowser = new PictureViewer();
TreeX tree = new TreeX();
TabPanel tp = new TabPanel();
tp.add(tree, 1);
tp.add(rtaPol, 2);
tp.add(imgBrowser, 3);
tp.selectTab(0);
tp.setWidth(100%);
RootPanel.get(leftpanel).add(tp);
}
as you can see, I intend the XmlParserUtil class to be reusable. If I
place there various logic, then it would be out of scope for that
classs, because I intend to use XmlParserUtil just to parse an XML
file, and bring me back a parsed Document object. now how would I do
that if XmlParserUtil, which contains the requestbuilder and callback,
would be used by another class (which is a composite).
im new to this async thing, more so
Re: Reading XML file from localhost
Heya,
Your basic problem here is that you can't have your XmlParserUtil return a
Document object. The doc field will only be filled in when the async
RequestBuilder request returns and the parser is finished with the XML string.
By that time, your method has already returned.
The only way to solve this is to create something like a:
public interface CallbackV {
void callback(V value);
}
and have the XmlParserUtil look something more like this:
public class XmlParserUtil {
String url;
Document doc;
public RequestBuilder requestBuilder;
String xmlStr;
public XmlParserUtil(String xmlFileName) {
this.url = xmlFileName;
}
public void getDocument(CallbackDocument callback) {
if(doc != null) {
callback.callback(doc);
return;
}
try {
requestBuilder = new
RequestBuilder(RequestBuilder.GET,url);
requestBuilder.sendRequest(null,new RequestCallback()
{public void onResponseReceived(Request arg0, Response
arg1) {
xmlStr = arg1.getText();
callback.callback(doc =
XMLParser.parse(xmlStr));
}
public void onError(Request request, Throwable
exception) {
}});
}
catch (RequestException ex) {
GWT.log(ex.getMessage(), ex);
}
}
}
For more information about async problems, it's related to RPC, but applicable
to the RequestBuilder as well:
http://lemnik.wordpress.com/2008/07/04/gwt-rpc-is-called-aynchronous-for-a-reason/
mives29 wrote:
okay, let me be clear on this, again, my code. (now posting full
reworked source code)
// A composite w/c contains a tree.
public class TreeX extends Composite {
Document doc;
Tree t = new Tree();
int imgUris;
XmlParserUtil xmlParser;
public TreePol() {
TreeItem tItem = getTreeItem();
t.addItem(tItem);
initWidget(t);
}
private TreeItem getTreeItem() {
doc = getDoc();
imgUris = doc.getElementsByTagName(Image).getLength();
TreeItem root = null;
root = new TreeItem(Image Names);
for (int i=0;iimgUris;i++) {
String tmpImgUri =
doc.getElementsByTagName(Image).item(i).getChildNodes().item(1).toString();
root.addItem(tmpImgUri);
}
return root;
}
public Document getDoc() {
xmlParser = new XmlParserUtil(image_uris.xml);
while (doc==null) {
doc = xmlParser.getDocument();
}
return doc;
}
}
//A class that i want to use as a utility class for parsing xml
documents. intended to be reusable
public class XmlParserUtil {
String url;
Document doc;
public RequestBuilder requestBuilder;
String xmlStr;
public XmlParserUtil(String xmlFileName) {
this.url = xmlFileName;
}
public Document getDocument() {
try {
requestBuilder = new
RequestBuilder(RequestBuilder.GET,url);
requestBuilder.sendRequest(null,new RequestCallback()
{public void onResponseReceived(Request arg0, Response
arg1) {
xmlStr = arg1.getText();
doc = XMLParser.parse(xmlStr);
}
public void onError(Request request, Throwable
exception) {
}});
}
catch (RequestException ex) {
GWT.log(ex.getMessage(), ex);
}
return doc;
}
}
//my entrypoint's onModuleLoad(), which adds the various custom
widgets i made to a tab panel
public void onModuleLoad() {
RichTextAreaX1 rtaPol = new RichTextAreaX1();
PictureViewer imgBrowser = new PictureViewer();
TreeX tree = new TreeX();
TabPanel tp = new TabPanel();
tp.add(tree, 1);
tp.add(rtaPol, 2);
tp.add(imgBrowser, 3);
tp.selectTab(0);
tp.setWidth(100%);
RootPanel.get(leftpanel).add(tp);
}
as you can see, I intend the XmlParserUtil class to be reusable. If I
place there various logic, then it would be out of scope for that
classs, because I intend to use XmlParserUtil just to parse an XML
file, and bring me back a parsed Document object. now how would I do
that if XmlParserUtil, which contains the requestbuilder and callback,
would be used by another class (which is a composite).
im new to this
Re: How to deserialize request ?
boraldomaster wrote: I have a service (class that extends RemoteServiceServlet). I have overriden method onBeforeRequestDeserialized there. This method recieves serializedRequest as a string. How can I deserialize it ? I'm assuming you actually need to deserialize the string by hand. If this is the case, take a look at the com.google.gwt.user.server.rpc.RPC class. Generally you shouldn't need to deserialize by hand, the RemoteServiceServlet will do it for you. So I'll assume you're logging the data for debugging, or some such ;) Hope this helps! --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Your opinion sought: Jetty or Tomcat?
I personally use Tomcat a lot more, mainly because it started as the reference implementation (though I know it no longer technically holds that position). The few times I've wanted to use Jetty I've had to switch back to Tomcat due to lack of system admin knowledge (ie: the various admins I was working with didn't know it). That all said, I almost never use Hosted Mode, and system admins don't have to deal with a development time engine. Tomcat does have much better IDE support than Jetty, but since Hosted Mode is in charge of that, again it makes no real difference. When I do run Hosted Mode it's with the -noserver option. So my end opinion: I think the change is a good idea, since the additional speed and lower memory load will encourage people trying out GWT for the first time. Tim wrote: jetty is awesome. In their latest drop (6.1.12.rc2 and rc3) there is a new feature in maven-jetty-plugin to reload jetty on keyboard events in console rather than automatically - it's indispensable when java GWT code lives in the same source tree as the server side java code (just in different package). And generally, maven jetty plugin is way better than Cargo stuff that's used for Tomcat. Also, Jetty Continuations are just some much easier to work with than Tomcat's Comet. No wonder they are including it into Servlet spec 3.0. Nothing particularly wrong with Tomcat but I think it's just lagging in terms of developer productivity features behind Jetty. On Oct 13, 9:42 pm, Michael Vogt [EMAIL PROTECTED] wrote: Hi Bruce. As part of this effort, we've all but decided to switch the hosted mode embedded HTTP server from Tomcat to Jetty. Would this break you? (And if so, how mad would you be if we did it anyway?) We figure most people who really care about the web.xml and so on are already using -noserver to have full control over their server config. I personally would welcome Jetty. I'm using it as part of Grails right now. It's fast and easy going. Cheers, Michael --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: passing parameters to gwt application
If you're on GWT 1.5, you can just use
Window.Location.getParameter(key);
rudolf michael wrote:
you just have to parse the http URL in your address bar.
in your onModuleLoad method just call the following method
public static native String getHref() /*-{
return $wnd.location.href;
}-*/;
public void onModuleLoad(){
String url = getHref();
// you just have to parse the url now using a regex and any
string utility you are familiar with
}
On Tue, Oct 14, 2008 at 12:44 PM, Tanzeem [EMAIL PROTECTED]
mailto:[EMAIL PROTECTED] wrote:
hi
i have a non-gwt applicaton's html page from which i have to pass
parameters trhough a href definition like a href=http://localhost:
7070/MyGWTApp?key=value
to a gwt application.How do i make changes in the GWT application to
enable parameter recieving?
Any help please.
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Re: setting an image to have a transparent background? (.getElement().setAttribute(style, .....)
As a rule of thumb, never setAttribute, when there is a property for that element that does the same job. For example, use setClassName() instead of setAttribute(class, ...), and getStyle().setProperty() instead of setAttribute(style). IE has problems handing setAttribute with any special values. So even when it comes to setting the URL for an image, rather use the setSrc() method in ImageElement. I wish someone had told me this earlier when I started coding JavaScript :P darkflame wrote: That method worked, I wasnt aware of that method of doing it. Cheers! :) My own method, incidently, always worked in Firefox, and firebug simply showed opacity: 0.65; for the style, without the alpha(opacity=65); for IE present at all. On Oct 13, 2:10 am, Paul Robinson [EMAIL PROTECTED] wrote: What happens if you try: Style style = temp.getElement().getStyle(); style.setProperty(filter, alpha(opacity=65)); style.setProperty(opacity, 0.65); firebug will tell you what style is in force for each element HTH Paul darkflame wrote: I'm trying to make a standard image have a code-dependant uniform transparency background, and for it to work across all browsers. Doing this in css is easy, and works, but GWT seems to not be having it. I'm using simply; temp.getElement().setAttribute(style, filter: alpha(opacity=65); opacity: 0.65); Where temp is just an image. This doesn't seem to have any effect, but I'm not sure why. The same style code in CSS works, does it have to be different when applied this way? And what referance do I look at to see the changes made? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: How to Dynamically resize RichTextArea
samsus wrote: Hello, Is there a way i can dynamically resize the RichTextArea Height?, that is, it starts with 50px height, and if the content inside the RichTextArea passes that limit, the height is increased. Any ideas? I'm not sure about automatically resizing the field (ie: it's probably possible, but will almost certainly involve a few hacks that will make you very dependant of the version of GWT you run). That said, why not add a grippy of some sort at the bottom that lets the user drag to resize the field (like WordPress has on their editor)? So you can resize it's height much like you resize a window? That way the user is in control of how big the area is. Just and idea ;) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Download file from server to client - w Servlet etc PLEASE?
I assume what you want is for the client to have a new file on their
hard-drive.
First you'll need a servlet that produces the data. I'm not sure what
data-format you want to work with, so I'm gonna assume a plain text file here
(note, this is all typed directly into my mail client, sorry for any mistakes).
public class MyFileServlet extends HttpServlet {
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws
ServletException, IOException {
resp.setContentType(text/plain);
resp.setHeader(Content-Disposition, attachment;
filename=output.txt);
PrintWriter out = resp.getWriter();
out.println(This is the output content);
out.println(Probably something dynamic should go in here);
}
}
Then you'll want to write the client side to fetch the file.
public class MyEntryPoint implements EntryPoint {
public void onModuleLoad() {
String link = GWT.getModuleBaseURL() + servlet/myfiledownload;
RootPanel.get().add(new HTML(a href=\ + link + \Download
File/a));
}
}
You can also use Window.open(link, downloadWindow, );
to download the file from an EventListener.
Finally you'll need to configure the servlet in either your Module.gwt.xml file
(for hosted mode), or in your web.xml file for web mode.
Module.gwt.xml example, add:
servlet path=/servlet/myfiledownload
class=your.package.name.here.MyFileServlet /
web.xml add:
servlet
servlet-nameMyFileServlet/servlet-name
servlet-classyour.package.name.here.MyFileServlet/servlet-class
/servlet
servlet-mapping
servlet-nameMyFileServlet/servlet-name
url-pattern/your.package.name.here/servlet/myfiledownload/url-pattern
/servlet-mapping
Like I show in the web.xml example, you'll need to make sure that the servlet
is
bound to the module base directory (where the nocache.html files all live), and
not next to the host HTML page. Another important factor is: the Servlet must
not be in your client package, since the GWT compiler shouldn't get hold of
it.
Hope this helps.
Jason.
JohnnyGWT wrote:
I've seen several discussions on how to download a file to the client.
All contain bits of code but no complete examples.
FileUpload is fine easy using Apache commons stuff.
Can someone PLEASE provide some examples etc for downloading a file to
the client?
In my scenario I have to send a newly created file to the client.
Either this is by a download servlet 'get' method or a URL.
Any full examples would be greatly appreciated.
Thanx in advance
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Re: How to make DialogBox modal both in terms of code execution and events?
This is the way it's done.
You can think of JavaScript as running on the event-dispatch-thread.
Therefore, opening a DialogBox and making the thread wait until a button is
clicked results in the following on the queue:
++ +-+
| wait for click | - | click event |
++ +-+
the wait for click will wait for ever since it never lets the thread move onto
the click event task and process the actual event.
This is a simplification, but in essence the way it works. I wrote about this
problem in terms of GWT RPC... but the principal is the same:
http://lemnik.wordpress.com/2008/07/04/gwt-rpc-is-called-aynchronous-for-a-reason/
Hope that explains things a bit.
lama wrote:
I have the same question.
I've had to workaround this by adding callbacks to transfer the data
from the dialog back to the caller.
Regards,
lama
On Aug 29, 9:16 am, gwt-user [EMAIL PROTECTED] wrote:
1. To illustrate the first point. In the following code:
boolean ok = Window.confirm(Are you sure .);
if (ok) {
}
code inside the if block will be executed only after user presses
button on the confirm dialog. Is it possible to do the same with
instance of DialogBox?
2. The following code
DialogBox dialog = new DialogBox(true, true);
dialog.show();
does not ignore keyboard and mouse events for widgets not contained by
the dialog
Thank you,
Boris
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Re: Problem with applaying z-index in firefox
As far as I know all versions of Firefox have this problem.
Any HTML will always sit behind a flash object. I've never seen anyone fix it,
and it really frustrates me when I hit a site that puts their navigation menu
on top of a flash object, because it makes the site totally unusable.
Bottom line: move the flash object; don't have a drop-down menu; or forget
supporting Firefox.
Sorry for the ranty tone, this is just something that really frustrates me.
ahmed saber wrote:
Hi,
i just building i vertical menu with sub menu relative to it, also i
have a flash banner
problem that when i traying view submenu it goes behind flash banner
i traying some tips like
give the main div {menu div} z-index: 1;
and the flash div z-index: -1 or zero;
also added this code to the object code
param name=wmode value=transparent
this works in IE only and i face problem with firefox version 3.0
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