from:"ep"

thats because the GWT Widget actually wraps a DOM Element, which is
used to render to the browser. Consider simple plain HTML, where you
want to render exactly same infoBox (let it be a divHello world/
div) twice, at the top and at the bottom of the page, you're really
going to have two different instances of Elements (Nodes), you cannot
attach the same Element twice to the DOM. Though, you can use the same
instance if you dont want to render it simultaneously, you can just
move that Element in the DOM hierarchy to make it appear once at
top, next time at  the bottom...

that's why you allways will have to create a new instance of a
composite for each visual rendering. another approach is not to wrap
the DOM Element, but instead to offer an API to render the contents
into, the way like ExtGWT works, then you may have only one instance
of a Widget i.e. holding complex data, and when rendering you just
provide that Widget two different instances of DOM Elements that
Widget will use to render its contents into.

treat your Widget as graphical only, so for rendering and keep your
data model outside, then there is no problem with multiple widget
creation, consider reading MVP topic

On 27 Nov., 21:09, Paul daemo...@gmail.com wrote:
 I have added the new for each instance. I do not understand why I can
 not add a composite multiple times. Does anyone know of a way to mimic
 this behavior if this is not directly possible. If I need to have 50
 identical things on the page, having to create 50 manually is
 ridiculous, I should be able to create one that I can use multiple
 times.

 On Nov 23, 10:43 am, ep eplisc...@googlemail.com wrote:

  what jhulford meant is that you really have to make a new on every
  widget class you add to any place.

  On 22 Nov., 06:00, Paul daemo...@gmail.com wrote:

   Sorry if this is somewhere else and I missed it, but I have aCustom
   Widget that I need to be able to addmultipletimesto anothercustom
   widget I am creating. I do not seem to understand something about this
   process and so I get the following errors:

   Different parents for double associations
   The other component is added to a parent component more than once.

   So basically, the first one gets nuked and only the second one shows
   up. What am I missing? Can someone please assist me in understanding
   what is wrong. Thank you so much in advance. Below is the code:

   public class FirstClass extends Composite
   {
        public FirstClass()
        {
             Image image = new Image(img/picture.png);
             AbsolutePanel element = new AbsolutePanel();

             element.add(image, 0, 0);

             initWidget(element);
        }

   }

   public class SecondClass extends Composite
   {
        public SecondClass()
        {
             HorizontalPanel element = new HorizontalPanel();

             VerticalPanel elementA = new VerticalPanel();
             element.add(elementA);

             VerticalPanel elementB = new VerticalPanel();
             element.add(elementB);

             elementA.add(new FirstClass());
             elementB.add(new FirstClass());

             initWidget(element);
        }

   }

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Re: Simple question about GWT.create() signature

Thomas, in fact it would be really nice if GWT.create() would not
require literals, we wanted to use a template method throughout our
framework to allow to declare the classes to instantiate, maybe you
can provide the issue number so we can vote for it :-)

  But after a month I discovered that the compiler does not like it at
  all (it complains that GWT.create must be called only using class
  literals... could be nice if it could find that MY helper is called
  with only using  literals...

 It's been requested several types in the past (including by people
 that now work at Google on GWT) but I guess it's either low priority
 or it would require too much re-work of the compiler's internals.

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Re: Place image in object, send object over rpc, use hibernate to update database

just wondering how u want to get image's raw data (binary) on the
client...actually not possible before html5, you have to upload the
image via browser form (and all the remnant data maybe as well to not
work with separate transactions)... take a look at gwtupload

On 29 Nov., 08:20, Noor baken...@gmail.com wrote:
 Thus,the object will contain an image

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Re: Client File IO

as didier already mentioned you'll dont have to care about stuff not
under governance of SoP, actually, the only work your rpc servlet will
have to do is to rewrite the URLs, here you can develop a logic based
on SoP:

i.e. an iframe may reference foreign sites, img as well, script, too,
etc. define the elements which are not under SoPolicy and you dont
need to rewrite their urls. on the other hand, you way rewrite
everything (except for absolute urls pointing to foreign hosts) and
your additional servlet will just make a pass-through. but then you
have to keep the state of base url, either in cookie or at the server,
to track the original site.

On 28 Nov., 21:50, khalid khalid@gmail.com wrote:
 Hello every one
 I am working on a web-based proxy using GWT (similar to php proxy)
 anyway , the idea is quite simple
 Get the URL from the user , make the server fetch it , change the
 HTML  and send it back to the client
 Now I have encountered a problem which is how to send the images back
 to the client?
 I have thought of two possible ways:
 1-Store them in the server and change their src to MyURL/img.xxx
 2-Send them back to the client
 The first option will over load the server (I think?!)
 The second option is not possible because as far as I know it is not
 possible to do File IO in the client side , or is it?
 I need your help
 Thank you very much
 ps: I think I will get a similar problem with flash , (e.g. flash
 videos in youtube)

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Re: onChange event fired twice

do you also add the current changehandler to the recently created
listbox? I mean, while you add the new listbox to the container, this
op fires the second change event, looks like you're nesting your
listboxes, so any change on the child box will propagate to the parent
resulting in second handler call...

you can use the eclipse' debugger to track why the onChange() is
called the second time (in dev mode)

On 28 Nov., 15:08, Leung leung1_2...@yahoo.com wrote:
 Hi,

 I have a private inner class that implements ChangeHandler. This ChangeHander 
 is applied to the listbox. Each click on the listbox will create another 
 listbox and added to the container. The onChange event is fired twice for one 
 click on the list box.

 Let say, I have 2 list box already added to the container. I expect only one 
 onChange is triggered when I click the last listbox. But, now, twice is fired.

 How does that happen?
 How can I troubleshoot this problem?

 Thanks

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Re: What is 'final' keyword for?

I guess he got confused on variable name, as actually  a final
pageSizeChanged promotes that cannot get changed and therefore the
latter check is needless

if (pageSizeChanged) {
  pageSize = length;
}

I've had to look at it twice as well ;)


On 29 Nov., 15:37, Paul Grenyer paul.gren...@gmail.com wrote:
 Hi



 On Mon, Nov 29, 2010 at 2:34 PM, ailinykh ailin...@gmail.com wrote:
  Hello, everybody!
  In HasDataPresenter.java I see code like this:

  // Update the page size.
     final boolean pageSizeChanged = (pageSize != length);
     if (pageSizeChanged) {
       pageSize = length;
     }

    and later
    if(pageSizeChanged)
      doSomething();

  What a reason to use 'final' keyword here? Dos it help to produce
  better java script?

 No. It's a clear intent that pageSizeChanged should not be changed
 after it is set. If someone does change it the compiler will tell you.
 Final is very important in Java. Look it up!

 --
 Thanks
 Paul

 Paul Grenyer
 e: paul.gren...@gmail.com
 b: paulgrenyer.blogspot.com
 t: pjgrenyer

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Re: GWTTest case mapping URI to file for testing

have you registered a servlet in your GWT module?

servlet class=yourServletClass path=/test.json/

On 29 Nov., 14:54, Raphael André Bauer raphael.andre.ba...@gmail.com
wrote:
 Hi folks,

 I want to write a GWTTestcase that fetches a file from the server.
 My setup is maven + headless htmlunit for integration testing (target
 integration-test).

 Say I got a json file (named test.json I want to read from the
 server in directory root. Where do I have to put my json file in my
 test setup so that a GET at /test.json returns that file?

 I always get a Error 404 NOT_FOUND from my jetty in the testcase.

 Thanks,

 Raphael

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Re: Using web.xml to automatically redirect to error page on any error

2010-11-25 Thread ep

hi, u think the right way :-)

how did you define your RemoteService methods? have you defined them
to throw exceptions?
GWT RPC works the way that it tries to forward (serialize) caught
exception to the client, if it is able to. that means, that if you
throw a NPE from your service implementation, you dont get 500 code
from the server, rather it would be http 200 (ok) and the exception is
serialized and streamed to the client, where RPC stack detects that
this is an exception and propagates to the onFailure() callback of the
Async implementation.

So the servlet container never guess there went something wrong.

On the other hand - I would not advise to break it, you dont need your
custom error handling for RPC, since you never call them manually
(i.e. by link) but rather over RPC, so a common error.jsp showing up
some warning information to the user would never do its job here,
since a user would never see that page.

On 25 Nov., 06:30, Yaakov yaakov.chai...@gmail.com wrote:
 Hi,

 I thought I have done this before with GWT...

 I have an RPC call to some resource. If something unforeseen (untested
 bug) happens during the RPC call in the server-side processing, I want
 to use the regular error-page mechanism to automatically redirect the
 browser to some standard error page (where it would announce that we
 are finding whoever introduced that bug and firing them :-) )

 I set this up in web.xml like this:
         error-page
                 exception-typejava.lang.Exception/exception-type
                 location/WEB-INF/pages/error.jsp/location
         /error-page

 For testing, I try throwing NullPointerException from within my server-
 side code. The exception seems to slip through the 'error-page'
 mechanism and still shows up in GWT, i.e., in the browser with this:
 com.google.gwt.user.client.rpc.StatusCodeException: The call failed
 on the server; see server log for details

 Is what I am trying to do not possible in GWT??? Frankly, and maybe
 because it's late :-), I don't understand why the 'error-page'
 mechanism doesn't kick in no matter what and return the contents of
 the error.jsp page at least. I.e., GWT should have no idea that an
 error even occurred because the 'error-page' mechanism should have
 caught it before the response goes back to the client.

 Any ideas anyone?

 Thanks,
 Yaakov.

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Re: Servlet Performance

2010-11-25 Thread ep

no performance penalty, since all the requests are processed in
parallel, by single instance though.

On 24 Nov., 23:48, Ross McKinnon r.mckinno...@googlemail.com wrote:
 Hi there,

 Just a quick question regarding performance of Servlets...

 My App is database driven and was wondering if performance is affected
 if there are multiple servlets opposed to one single servlet to handle
 all requests?

 Thank you

 Ross

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Re: Get all events

hi, is this one you're looking for?
http://groups.google.com/group/google-web-toolkit-contributors/browse_thread/thread/c5d8b0d04d3ab946#
if so, maybe we can make an issue on that :)

elsewise, maybe a workaround would help:

write a JSNI method which takes generic eventhandler and a widget it
shall bind it with, and attach your handler from within the javascript
code (referring to widget's method via GWT's @class references, rather
than raw JS code)

On 24 Nov., 10:43, MAM mersni.am...@gmail.com wrote:
 please , need help!!

 thanks

 On 23 nov, 09:53, MAM mersni.am...@gmail.com wrote:







  thanks for the reply , i'm not trying to listen to native dom events .
  i give you an example to understand:

  - i have a button add with an addClickHandler
  - At runtime i'm trying to get all button's properties and events (in
  this case the addClickHandler)

  Thanks

  On 19 nov, 12:25, Jack mlsubscri...@gmail.com wrote:

   You mean something like:

   Event.addNativePreviewHandler(NativePreviewHandler handler)

   ?

   JavaDoc: Adds a NativePreviewHandler that will receive all events
   before they are fired to their handlers. Note that the handler will
   receive all native events, including those received due to bubbling,
   whereas normal event handlers only receive explicitly sunk events.

   On 19 Nov., 10:33, MAM mersni.am...@gmail.com wrote:

i want to retrieve all events , previouslyadded to a Widget(button,
Panel, TextFiled ...) , at runtime

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Re: Giving focus to a node in a CellTree

what do you mean by node? you can only give a focus to HTML elements
supporting it, i.e. an image cannot receive a focus but an anchor
(a) so in this case you can wrap the image in an anchor making it
focusable

On 24 Nov., 06:49, David Pinn dp...@byandlarge.net wrote:
 The CellTree widget has a setFocus() method..cool; but I can't see how
 I can give keyboard focus to a specific node within the tree. Can
 someone help me with that?

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Re: ACL in GWT

hi, you might want to take a look at http://code.google.com/p/gwt-security/
or http://code.google.com/p/acris/

On 24 Nov., 11:56, Baloe nielsba...@gmail.com wrote:
 Hi all,

 I wonder what is the best way to put ACL in our GWT project. Is there
 any mechanism in GWT build-in to grand users to specific RPC calls, or
 something similar? Our should we just insert Spring Security
 somewhere?

 Thanks for any hints!
 Niels

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Re: errors when testing GWT app. with IE6

please recompile your application with code-generation: detailed and
run again, then you'll get at least meaningful stacktraces in your
exceptions, what running application in dev mode? did you try to
debug?

On 24 Nov., 14:28, pepgrifell pepgrif...@gmail.com wrote:
 hi,

 we have an application developed with GWT2.0.3 and GXT2.1.3. It works
 perfectly with IE7 and IE8 but we have tried the application with IE6
 and we are getting some errors. Does anyone know which could be the
 cause of these errors ?

 **
 first error:

 12030Unknown.fillInStackTrace(Unknown source:0)Unknown.
 $StatusCodeException(Unknown source:0)Unknown.
 $onResponseReceived(Unknown source:0)Unknwon.
 $fireOnResponseReceived(Unknown source:
 0)Unknown.onReadyStateChange(Unknown source:
 0)Unknown.anonymous(Unknown source:0)Unknown.entry0(Unknown source:0)

 I have found this post (http://groups.google.com/group/google-web-
 toolkit/browse_thread/thread/1fbcf344b6733c1d9), but we are using OC4J
 and JBoss without Apache.

 **

 second error:

 com.google.gwt.core.client.JavascriptException:(TypeError): 'parent_0'
 is null or not an object. number: -2146823281

 **

 third error:
 when entering to app. browser asks if we want to see secure and
 nonsecure elements. After that IE crashes.

 **

 Thanks !

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Re: GWT Compile Error with Tomcat (apache.commons) libary

you might think about moving the GWT client code (which contains
client and shared packages) into custom project to not mixup
classpaths during compile and runtime, after all GWT produces piece of
JS which is actually the one your project needs. so you dont need to
recompile everytime, rather update the produced binaries everytime
at GWT compilation cycle.


On 23 Nov., 10:58, Sophia Shek sophia.liwei.s...@gmail.com wrote:
 More details:
  I am using eclipse(Galileo)+tomcat plugin+gwt plugin, The java build
 libraries’ order: JRE System libary
 GWT SDK - GWT2.1.0
 Apache Tomcat
 Web App Libraries

 The project uses Spring MVC+ lots of JSP, only one part of the system using
 GWT. That is for menu items.

 At the moment, every single time I check out a project, I have to compile
 the GWT menu module which is kind of annoying.

 The problem is when I compile the GWT module, some source file got red lined
 of using apache.common. digester. It compiled OK without GWT. It is confused
 with the apache.common. digester and GWT digest Is this a known issue? I am
 new to GWT, help please?

 On Mon, Nov 22, 2010 at 5:06 PM, 7of9 sophia.liwei.s...@gmail.com wrote:

  When compile GWT,I receive the following error:

  [ERROR] Unexpected
  java.lang.NoSuchFieldError:
  reportUnusedDeclaredThrownExceptionIncludeDocCommentReference

  I googled around and found the solution

  - Right-click the project  Properties
  - Java Build Path  Order and Export
  - Move the GWT SDK above the Server Library (like Apache Tomcat or
  SpringSource tc Server)

  This did solve the compile error. However the method used
  org.apache.commons.digester.Digester module are redlined. It tried to
  find the digest RuleSetBase interface in gwt-dev.jar.

  Has anyone came cross similar problem before? Help please!!!

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Re: GWT Compile Error with Tomcat (apache.commons) libary


 I also read another guy's post. He put GWT in seperate project. So two
 projects, one for front end, one for back end.

it is indeed very common to do it this way, maven could also help you
here


 It will be ideal whenever eclipse rebuilds the project, it compiles GWT as

you can do so, by creating your build.xml file and registering a
custom builder in project properties, then eclipse will trigger the
builder everytime it detects changes in the project space.

 well. Or GWT stop override tomcat libary at least!

7of9 pointed out how to prevent GWT from overriding other classes (put
it at bottom of the classpath)

still, as your GWT addon is not an application, but rather an addon^^
you can handle it that way, just make it pluggable. you can also
connect the projects via eclipse project reference and configure the
gwt compiler plugin to flush the output into your masterproject's war
directory

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Re: How do you use Custom Widgets (Composites) multiple times?

2010-11-23 Thread ep

what jhulford meant is that you really have to make a new on every
widget class you add to any place.

On 22 Nov., 06:00, Paul daemo...@gmail.com wrote:
 Sorry if this is somewhere else and I missed it, but I have a Custom
 Widget that I need to be able to add multiple times to another custom
 widget I am creating. I do not seem to understand something about this
 process and so I get the following errors:

 Different parents for double associations
 The other component is added to a parent component more than once.

 So basically, the first one gets nuked and only the second one shows
 up. What am I missing? Can someone please assist me in understanding
 what is wrong. Thank you so much in advance. Below is the code:

 public class FirstClass extends Composite
 {
      public FirstClass()
      {
           Image image = new Image(img/picture.png);
           AbsolutePanel element = new AbsolutePanel();

           element.add(image, 0, 0);

           initWidget(element);
      }

 }

 public class SecondClass extends Composite
 {
      public SecondClass()
      {
           HorizontalPanel element = new HorizontalPanel();

           VerticalPanel elementA = new VerticalPanel();
           element.add(elementA);

           VerticalPanel elementB = new VerticalPanel();
           element.add(elementB);

           elementA.add(new FirstClass());
           elementB.add(new FirstClass());

           initWidget(element);
      }

 }

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Re: Request order

2010-11-22 Thread ep

well, actually, there is. you could subclass remoteServiceServlet and
implement the marker interface SingleThreadModel (servlet API), then
your container ensures to process only one request at a time by that
servlet instance. yet, no one prevents client from sending request B
before A even though you instructed so in your code.

this is your business case - create a chain on the client to execute
dispatched requests in sequential order

On 21 Nov., 14:44, Stefan Bachert stefanbach...@yahoo.de wrote:
 Hi Jeff,

  Here's what
  I'm still not sure of: are you looking to undo/redo at the attribute level,
  the entity level, transaction (multiple entities) level?

 I do no more looking for undo/redo, I solved it at the latter level.

 However, the reason for this thread was that I figured out, that
 nothing guaranties, that servlet requests are executed in the same
 order as they are send from browser.
 Meanwhile I did some locking/check to enforce the order.
 I had hoped that someone knows an easy solution, may be some
 configuration entry. However, topic solved.

 Stefan Bacherthttp://gwtworld.de

 On 20 Nov., 16:22, Jeff Chimene jchim...@gmail.com wrote:







  Hi Stefan:

  Perhaps we need a better functional requirement?

  From what I can tell, there is a requirement for transaction semantics; it's
  difficult to eliminate this requirement based on the conversation so far (In
  this thread you introduced the concept of interacting servers). Here's what
  I'm still not sure of: are you looking to undo/redo at the attribute level,
  the entity level, transaction (multiple entities) level?

  Perhaps there's some Java server-side technology that you can employ?

  On Sat, Nov 20, 2010 at 7:20 AM, Stefan Bachert 
  stefanbach...@yahoo.dewrote:

   Hi,

   I had a look at gwt-dispatch.

   I do not see any logic which is able to avoid to execute requests on
   the server side in an other order than the client sends it.
   This situation may happens rarely but it is not impossible.

   An example.

   Client send three requests A,B,C.

   Servlet-Thread x get request A but stops/waits/slowdown for some
   reason very early, may be in the dispatcher itself.

   An other thread y get request B and thread z get request C.
   Request C may completes first, before B completes, before C completes.
   (Not likely, but not impossible)
   (Consider running a container on two cpus, too!)

   gwt-dispatch lacks other problems. It produces too much communication
   and latency. When the server is working with transactions, any action
   will require one transaction, which slows down the server performance,
   too.
   So gwt-dispatch is not a good choice for a high performance systems.

   Stefan Bachert
  http://gwtworld.de

   On 19 Nov., 14:56, ep eplisc...@googlemail.com wrote:
actually, its concern of a client to chain the requests, as only it
knows in which order the requests are initiated. actually, your user
shall not be available to execute instructions in parallel, so your
button has to be disabled until previous calculation (server response)
has been returned.

again, you may want to have a look at gwt-dispatch project. they
implement Command Pattern with easy undo support, and chaining. the
latter would help if you dont want to disable your button whilst
processing results, so the requests are just queued in order they are
requested and processed sequentially, each based on the result from
the other...

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Re: Invalid version number 2.0 passed to external.gwtOnLoad(), expected 2.1

please clear cache of your browser and delete all the output dirs for
modules (that named after your module found under war folder)

On 17 Nov., 07:16, Hendrik Jan van Randen hjvanran...@gmail.com
wrote:
 We're migrating our GWT 2.0.4 application to GWT 2.1.0.
 I've therefore upgraded my Google Plugin for Eclipse to GWT 2.1.0.

 When I try to run our application in the GWT debugger in Eclipse
 (Debug as web application, go to its URL in Firefox) I get the
 following message:

 Connection received from localhost:47526
    [ERROR] Invalid version number 2.0 passed to
 external.gwtOnLoad(), expected 2.1; your hosted mode bootstrap file
 may be out of date; if you are using -noserver try recompiling and
 redeploying your app

 Recompiling doesn't resolve the problem.
 Also changing the version from 2.0 to 2.1 in the line
 var $hostedHtmlVersion=2.1;
 in the files hosted.html in the war directory doesn't resolve the
 problem.
 I cannot find any explicit instructions to migrate from GWT 2.0 to
 2.1.

 My environment:
 Ubuntu 10.04 LTS
 Firefox 3.6.12 with Google Web Toolkit Developer Plugin for Firefox
 1.0.7511
 Eclipse Helios with Google Plugin for Eclipse with GWT version 2.1.0.

 Any suggestions how I can resolve this problem?

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Re: Java Exception lost in 2.1.0 works in 2.0.4

what about debugging? you can compile with no obfuscation (detailed
level would be best) and use browser's debugger to get the place where
the error arises, i.e. remove the throwable catch, compile detailed,
enable debugger in IE (or install firebug in FF) and let the error
appear. when clicking on that error the debugger brings you to the
place where it happens. maybe you could post those JS fragment found.

maybe CLBParse class is not 2.1 compatible

On 17 Nov., 23:23, Rob Hennessy rob.henne...@gmail.com wrote:
 Hi All,

 I have a web app where I exposed a class's static method using JSNI,
 as in the JSNI example. I execute the method from the native event
 handler.

 Within the method, I try and catch, and return any exception's message
 as the method's return value.

 The method works properly in 2.0.4, but in 2.1.0 it only works in
 devmode

 In 2.1.0 production mode any exception I get returns Index:-1, Size:
 0 and is always in the Throwable catch. With no Throwable catch, the
 browser states object error.

 public static String parse(String script) throws ParseException{
         try {
             CLBParse parser = new CLBParse(new
 MyStringReader(script));
             SimpleNode root = parser.Input();
             return ;
         } catch (ParseException e) {
             return e.getMessage();
         }catch( Throwable e) {
             GWT.log(something bad, e);

             return e.getMessage();
         }
        return ;

 }

     public native void export() /*-{

       $wnd.TryParse =
 $entry(@com.test.app.client.CalcScriptReformatter::parse(Ljava/lang/
 String;));

 }-*/;

 I've tried with and without the $entry wrapper.

 Is this a bug in 2.1.0, or should I be doing something different?

 Thanks,
 -Rob

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Re: Request order

actually, its concern of a client to chain the requests, as only it
knows in which order the requests are initiated. actually, your user
shall not be available to execute instructions in parallel, so your
button has to be disabled until previous calculation (server response)
has been returned.

again, you may want to have a look at gwt-dispatch project. they
implement Command Pattern with easy undo support, and chaining. the
latter would help if you dont want to disable your button whilst
processing results, so the requests are just queued in order they are
requested and processed sequentially, each based on the result from
the other...

On 19 Nov., 14:36, Stefan Bachert stefanbach...@yahoo.de wrote:
 Hi,

 for me undo is just a replay of the transitions in the opposite order.
 So in this context replay is just the direction independant term of
 undo/redo.

 Using a key logger is an other kind of replay which is not my case.

 Any transition runs in a transaction.

 SN alone is not sufficient. Consider the user clicks 2 buttons
 quickly.
 button a = method which add a number, say 4
 button b = method which multiply a number, say 4.

 The order must preserved because the result depends on it.
 a,b : 0 + 4 = 4; 4*4 = 16;
 b,a : 0 * 4 = 0; 0 + 4 = 4;

 You could only hold undo/redo state in client in very simple cases.
 In common only the server side has enough access to the needed data.
 In addition security aspects forces the undo/redo sequence to be on
 the server side,

 Meanwhile I send an SN with any request and force the order the
 request.
 (Still wondering what will happen when the app needs to run on
 multiple servers, OK, not a GWT topic)

 Stefan Bacherthttp://gwtworld.de

 On 18 Nov., 17:34, Jeff Chimene jchim...@gmail.com wrote:

  On Thu, Nov 18, 2010 at 9:18 AM, Stefan Bachert 
  stefanbach...@yahoo.dewrote:

   Hi,

   I am doing undo/redo. Therefore it is mandatory to handle all requests
   on the server in the same order to be able to replay it

  There are two issues here:

  undo/redo
  replay

  They are different.

  Setting aside transaction semantics (commit/rollback) since you're probably
  not interested in implementing that, undo/redo can be performed by attaching
  a sequence number per write to the server, keeping that SN in undo/redo
  stacks on the client, manipulating the stacks as appropriate.

  replay requires a keystroke logger.

  Do you really need to interact with the server for such a feature?

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Re: How can I truncate an image before upload

before HTML5 its not possible in javascript to transform images, but
you can ask google, if found library you can simply use it within GWT.
Elsewise, just get your image uploaded - and transform it on the
server

On 19 Nov., 15:35, Ice13ill andrei.fifi...@gmail.com wrote:
 Well, I was thinking about creating a temp copy of the image, scale it
 and upload the new image.
 But i don't want to use other technologies (Java applet or JavaFx).
 Other gwt libraries are ok.

 On Nov 19, 4:16 pm, Didier Durand durand.did...@gmail.com wrote:

  Hi,

  GWT translate Java to Javascript to run on the client side.

  This javascript is then in the usual sandbox preventing access to pc
  files: I would say that what you want to achieve is not possible
  because of this js architecture unless you go to very special tricks
  requiring additional component. 
  Seehttp://www.baconbutty.com/blog-entry.php?id=29

  didier

  On Nov 19, 3:07 pm, Ice13ill andrei.fifi...@gmail.com wrote:

   Is it possible to resize an image (thus creating an image with a
   smaller size) using GWT?
   Let's say i have a 5Mb picture, but before i upload it to the server i
   want to automatically resize it to be smaller that 1Mb
   How can i do that ?

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Re: What should I learn , Google Web Toolkit or Jquery ?

i guess jquery would be best for drupal / wordpress to achieve web2.0
effects. I mean GWT can be used just as a cross compiler, i.e. if you
want to build complex OOP driven masterpiece with no widgets and dont
want to pseudo OOP on javascript. so its all about the problem to
solve

wud be good to know your intention? p.s. as for CMS you can also try
vosao :)

On 18 Nov., 18:48, kachaloo vishal.khial...@gmail.com wrote:
 Hi,
 I am currently deciding in which technology should I put more time in
 and learn . I have been working with drupal and wordpress since 4
 months and I like the platforms.

 As for the browser side work I am a bit confused whether I should put
 more time in

 google web toolkit + drupal  / word press

 or

 jquery + drupal / wordress

 Thank you in advance for sharing your views,
 Kachaloo

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Re: What should I learn , Google Web Toolkit or Jquery ?

btw: how do you use jQuery's plugins with GQuery? I didnt found an API
so had to integrate jQuery for its plugins, GQuery for better API on
effects and wrapped the plugins via JSNI, but maybe GQuery is / going
to support jQueries plugins?

On 19 Nov., 16:41, Christian Goudreau goudreau.christ...@gmail.com
wrote:
Personally, I use both with a little distinction, I use GQuery instead of
jQuery. GWT and jQuery are two different things to me and can be used in
conjunction while making great web application.

Cheers,

On Fri, Nov 19, 2010 at 10:30 AM, Didier Durand
durand.did...@gmail.comwrote:

Hi,

My 2 cents:

a) learning curve for GWT higher than JQuery
b) You can't work efficiently with GWT if you don't master html, http,
javascript anyway...
c) GWT is great because you come back to compile mode: your code is
correct much faster and you don't have to write lots of unit test to
confirm that nothing wrong happens at run time when you change your
app in the more risk env of an interpreted language (js)
d) GWT is also great because you can leverage the best equipped
language in terms of tooling: Java for unit tests (Junit), quality
measurement (findbugs, pmd), code coverage (cobertura), profiling,
etc
e) with GWT, you don't deal with the broswer type at all (at least in
theory...) so you code faster
f) if back-end is java also, you face a single technology for the
client and the server side - more manageable and simpler to handle by
a single person.

But, I agree with what was said before: the ticket to entry is bigger.
So, probably not suited to a small app.

regards

didier

On Nov 19, 3:34 pm, massimo malvestio massimo.malves...@gmail.com
wrote:
In my opionion it depends on the complexity of your project.
If you have to write a webapp / site with a complex interface that it has
to
be feeded with a large amount of data, or you want to reserve the
capability
to scale, and you have a couple of weeks to study gwt, choose gwt.
If you have not time enough to learn gwt, or, you don't need to manage
complex data exchange between client and server but you want an eye candy
web gui, learn jquery, it's quite easy to learn and use and you got tons
of
plugins ready to be used.
I use both of them anyway, because, in my opinion, they are
complementary,
use the weapon more suitable for the size of your target :-P

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[gwt-contrib] Re: GWT 2.1 Logging

ok, got it, thank you.

one thing for clarification on logLevels and code permutations:
I've used to live with gwt-log for some time, for every logLevel they
do create a new code permutation which optimizes away code on any
other levels, say:

extend-property name=log_level values=info, warn/ would add two
more permutations during compile, one for info the other for warn.
during runtime then I can choose via log_level = info or warn with
which loglevel I want to run my application, I cannot decide to use
another loglevel though, unless previously defined in the module
descriptor. So whilst runtime there is no code for log instructions
other than requested via log_level property.

I suppose it works dynamically in native gwt logging, so loglevel does
not effect code permutation and one has to ensure his log statement is
secured with isLoggable() check.


On 17 Nov., 20:32, Unnur Gretarsdottir unn...@google.com wrote:
 Hi there - answers are inline...

 On Wed, Nov 17, 2010 at 4:56 AM, ep eplisc...@googlemail.com wrote:
  hello folks,
  whats the difference between the:

  set-property name=gwt.logging.logLevel value=OFF/

 This will set the Level of the RootLogger to be OFF



  and

  set-property name=gwt.logging.enabled value=FALSE/

 This will swap in Null Implementations for the logging related
 classes, which will compile out.



  ?

  I understand I can use LogConfiguration.loggingIsEnabled() to wrap the
  code I want to optimize away during compilation, but I could also do:

  if(java.util.logging.Logger.isLoggable(Level.INFO)) {
   logger.info(this code will be compiled out if logLevel is below
  requested? complex result:  + doSomeComplexCalc());
  }

  couldn't I?

 Yes - the LogConfiguration method is just something I added for convenience.



  or, I guess that gwt.logging.logLevel does not effect the compiler, so
  only gwt.logging.enabled will provide NULL implementation?

 Yes - exactly - see my response above



  what about the loglevels - is there new permutation per each or are
  logging instructions not inlined during compilation? ( like in gwt-log
  project )

 Not sure exactly what you mean here



  are there more papers on new logging I can dive in?

  thank you.

 Not really, but you can look at the source code - it's actually more
 straightforward than you would think. Note that you'll want to look at
 the both the files in logging, as well as the emulation classes in
 supersource.  However many of the emulated classes just punt out to
 Null or Regular Impl classes, which are in the logging directory.



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Re: GWT RPC serialization between 2 servlets

not sure if this will work outofthe box, since in GWT RPC there is
always a client which is initiating an RPC request first. so you have
to do so in your server code, except for there is nor XHR on the
server, the rest should work fine, especially serialization of the
request command, which you would pass from one servlet to another
using POST (not GET).

do you have to use HTTP beyond or would be be ok to use just tcp or
udp socket? I'd either go for RMI, binary serialization (no http) or
JSONP / XML (http) which you can easily get started with, of course
SOAPis the king^^ but I guess would be kinda overkill here.

On 17 Nov., 14:55, Greg Dougherty dougherty.greg...@mayo.edu wrote:
 Use Java Serialization to send the the objects from one servlet to
 another.

 Make sure you have the Objects implement Serializable.  :-)

 You can override doGet without damaging GWT RPC.  One servlet does
 that, the other (the one driving the exchange) makes an HTTP call to
 it.  They both use Object*Streams to send and receive the object(s).

 Greg

 On Nov 17, 6:52 am, Ice13ill andrei.fifi...@gmail.com wrote:

  Hello, I want to send objects between 2 servlets and i was wondering
  if the GWT RPC mechanism used for client - server communication can
  also be used to send data across two servlets that extend
  RemoteServiceServlet.

  Or maybe I can use the Java serialization to actually send bytes from
  one servlet to another ?

  Any ideas ?

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Re: GWT RPC serialization between 2 servlets

actually, if your beans implement the Seriliazable interface (not only
IsSerializable) you can just use java's ObjectStream to get them on
wire. (look for short demo at
http://download.oracle.com/javase/tutorial/essential/io/examples/ObjectStreams.java
)

so your servlets would communicate over POST together where you wrap
the output/inputream (which you get from your HttpServletRequest /
HttpServletResponse) into the object stream and exchange your POJOs,
thats it. Note that you extend usual HttpServlet class rather than
GWT's RemoteServiceServlet and do your magic in the doPost() methods.

On 17 Nov., 16:31, Andrei Cosmin Fifiiţă andrei.fifi...@gmail.com
wrote:
Thx for the answers...
I wanted to use serialization from the start but i really want to know how
can i use JSON.
BUT, i need to know if there is something simple that i can use (GWT, java,
or other libs). For example, i have some java beans (with simple fields -
string, integer, lists of those types...) and i want to
serialize/deserialize them without modifying them. (widhtoug adding
annotations, other methods, extending... or at least, very few
modifications)

On 17 November 2010 16:53, ep eplisc...@googlemail.com wrote:

not sure if this will work outofthe box, since in GWT RPC there is
always a client which is initiating an RPC request first. so you have
to do so in your server code, except for there is nor XHR on the
server, the rest should work fine, especially serialization of the
request command, which you would pass from one servlet to another
using POST (not GET).

do you have to use HTTP beyond or would be be ok to use just tcp or
udp socket? I'd either go for RMI, binary serialization (no http) or
JSONP / XML (http) which you can easily get started with, of course
SOAPis the king^^ but I guess would be kinda overkill here.

On 17 Nov., 14:55, Greg Dougherty dougherty.greg...@mayo.edu wrote:
Use Java Serialization to send the the objects from one servlet to
another.

Make sure you have the Objects implement Serializable. :-)

You can override doGet without damaging GWT RPC. One servlet does
that, the other (the one driving the exchange) makes an HTTP call to
it. They both use Object*Streams to send and receive the object(s).

Greg

On Nov 17, 6:52 am, Ice13ill andrei.fifi...@gmail.com wrote:

Hello, I want to send objects between 2 servlets and i was wondering
if the GWT RPC mechanism used for client - server communication can
also be used to send data across two servlets that extend
RemoteServiceServlet.

Or maybe I can use the Java serialization to actually send bytes from
one servlet to another ?

Any ideas ?

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Re: Request order

batch them (the requests) from client and push them in same http
request :)

do you need them to execute also in the same order? meaning serially?
so that requests actually cannot be processed in parallel anymore?
then you may want to look at gwt-dispatch project, they recently have
added support to queue the requests.

otherwise you could queue the requests manually on the client and
execute them one after another... but Jeff already asked a right
question


On 17 Nov., 12:07, Stefan Bachert stefanbach...@yahoo.de wrote:
 Hi,

 I need to get any requests from my browser client in the same order on
 the server side.

 implementing SingleThreadModel would not solve this requirement.
 synchronizing HttpSession may fail on 3 or more requests.

 Any ideas how to achive this?

 Stefan Bacherthttp://gwtworld.de

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Re: GWT RPC serialization between 2 servlets

hm, not necessarily, you can also override doService() to hook in at
lower level and delegate in there, but would be messy, though. maybe
googles rpc servlets are just not intented to allow change on
communucation protocol

On 17 Nov., 17:01, Greg Dougherty dougherty.greg...@mayo.edu wrote:
 AbstractRemoteServiceServlet (which all GWT Servlets inherit from)
 declares public final void doPost.  So regardless of what you SHOULD
 do, if you've got a GWT Servlet that you want to ALSO handle HTTP
 requests, then is HAS to do it through doGet.

 Unless you can point me to some hook in the processing chain I've
 missed?

 Greg

 On Nov 17, 8:53 am, ep eplisc...@googlemail.com wrote:

  not sure if this will work outofthe box, since in GWT RPC there is
  always a client which is initiating an RPC request first. so you have
  to do so in your server code, except for there is nor XHR on the
  server, the rest should work fine, especially serialization of the
  request command, which you would pass from one servlet to another
  using POST (not GET).

  do you have to use HTTP beyond or would be be ok to use just tcp or
  udp socket? I'd either go for RMI, binary serialization (no http) or
  JSONP / XML (http) which you can easily get started with, of course
  SOAPis the king^^ but I guess would be kinda overkill here.

  On 17 Nov., 14:55, Greg Dougherty dougherty.greg...@mayo.edu wrote:

   Use Java Serialization to send the the objects from one servlet to
   another.

   Make sure you have the Objects implement Serializable.  :-)

   You can override doGet without damaging GWT RPC.  One servlet does
   that, the other (the one driving the exchange) makes an HTTP call to
   it.  They both use Object*Streams to send and receive the object(s).

   Greg

   On Nov 17, 6:52 am, Ice13ill andrei.fifi...@gmail.com wrote:

Hello, I want to send objects between 2 servlets and i was wondering
if the GWT RPC mechanism used for client - server communication can
also be used to send data across two servlets that extend
RemoteServiceServlet.

Or maybe I can use the Java serialization to actually send bytes from
one servlet to another ?

Any ideas ?

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Re: GWT RPC serialization between 2 servlets

by the way, why I dont recommend to use GET is because this http
method simply does not define to have body where you can put big
amount of data, its all about the url and its params and some extra
data like a header...no place for big payload

On 17 Nov., 17:01, Greg Dougherty dougherty.greg...@mayo.edu wrote:
 AbstractRemoteServiceServlet (which all GWT Servlets inherit from)
 declares public final void doPost.  So regardless of what you SHOULD
 do, if you've got a GWT Servlet that you want to ALSO handle HTTP
 requests, then is HAS to do it through doGet.

 Unless you can point me to some hook in the processing chain I've
 missed?

 Greg

 On Nov 17, 8:53 am, ep eplisc...@googlemail.com wrote:

  not sure if this will work outofthe box, since in GWT RPC there is
  always a client which is initiating an RPC request first. so you have
  to do so in your server code, except for there is nor XHR on the
  server, the rest should work fine, especially serialization of the
  request command, which you would pass from one servlet to another
  using POST (not GET).

  do you have to use HTTP beyond or would be be ok to use just tcp or
  udp socket? I'd either go for RMI, binary serialization (no http) or
  JSONP / XML (http) which you can easily get started with, of course
  SOAPis the king^^ but I guess would be kinda overkill here.

  On 17 Nov., 14:55, Greg Dougherty dougherty.greg...@mayo.edu wrote:

   Use Java Serialization to send the the objects from one servlet to
   another.

   Make sure you have the Objects implement Serializable.  :-)

   You can override doGet without damaging GWT RPC.  One servlet does
   that, the other (the one driving the exchange) makes an HTTP call to
   it.  They both use Object*Streams to send and receive the object(s).

   Greg

   On Nov 17, 6:52 am, Ice13ill andrei.fifi...@gmail.com wrote:

Hello, I want to send objects between 2 servlets and i was wondering
if the GWT RPC mechanism used for client - server communication can
also be used to send data across two servlets that extend
RemoteServiceServlet.

Or maybe I can use the Java serialization to actually send bytes from
one servlet to another ?

Any ideas ?

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Re: Ability to set element id trough UIBinder widget

from the one point of view, it would be good to pass over any DOM atts
to its elements, maybe this could be accomplished by defining html
namespace, so as html:id=foo or html:onclick=wtf() would be bound
to the underlying element :) oh u see, it can get dirty. the most
important question yet is, WHICH is the DOM element represented by
i.e. g:FlowPanel? its hidden by implementation, so the only, maybe
useful set of attributes is already definable, id is an exception
though

On 17 Nov., 19:56, Jeff Larsen larse...@gmail.com wrote:
 it would be really nice to be able to set generic HTML attributes on
 widgets and not just on html items. There are several use cases where
 it would be awesome to be able to do something like

 g:FlowPanel attribute=param, value ui:field=flowPanel/ which
 would output something like

 div param=value/

 now there are plenty of edge cases that aren't covered in this
 example, but this would be really useful for me in my app and allow me
 to not have to extend every control where I need to add a HTML
 attribute.

 On Nov 16, 12:27 pm, Jason jaso...@gmail.com wrote:







  I believe you would do this with the debugId attribute as follows:

  g:TextBox ui:field=field debugId=usernameInput/

  On Nov 15, 11:12 am, Janusz janusz.parfien...@gmail.com wrote:

   Hello,
     I've been looking for a way to set DOM element id trough UIBinder
   but I couldn't find any solution. Example of what I'd like to do:

   g:HTMLPanel
     label for=usernameInputSome label/label
     g:TextBox ui:field=field id=usernameInput/
   /g:HTMLPanel

   Id like this to be rendered as:
   div
     label for=usernameInputSome label/label
     input type=text id=usernameInput /
   /div

   Sadly this doesn't work the way I wanted it to. As far as I can
   understand id attribute in UIBinder is treated as an id for XML
   element that is being parsed by UIBinder processor. I've tried things
   like JSP/JSF syntax:

     g:TextBox ui:field=field element.id=usernameInput/

   but this doesn't work either. Does anyone know if it is possible in
   UIBinder to set an id for resulting DOM element? Currently to achieve
   this one has to go to java code and use field.getElement().setId().

   Thanks

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[gwt-contrib] GWT 2.1 Logging

hello folks,
whats the difference between the:

set-property name=gwt.logging.logLevel value=OFF/

and

set-property name=gwt.logging.enabled value=FALSE/

?

I understand I can use LogConfiguration.loggingIsEnabled() to wrap the
code I want to optimize away during compilation, but I could also do:

if(java.util.logging.Logger.isLoggable(Level.INFO)) {
 logger.info(this code will be compiled out if logLevel is below
requested? complex result:  + doSomeComplexCalc());
}

couldn't I?

or, I guess that gwt.logging.logLevel does not effect the compiler, so
only gwt.logging.enabled will provide NULL implementation?

what about the loglevels - is there new permutation per each or are
logging instructions not inlined during compilation? ( like in gwt-log
project )

are there more papers on new logging I can dive in?

thank you.

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Re: Question that i don't found in yours FAQ's

2010-10-26 Thread ep

you could compile your CLIENT classes with whatever java version you
want, at the end javascript comes out. for the server part you have to
compile binaries compatible to your server environment, you'd better
write compilation script in ant so you can choose different targets
for compilation processes, both running on java 6

watchout for generics and java 5 features like for loop, varargs etc,
which are not supported  java 5, you may not use them in your server
code, especially when working with GWT RPC, where u usually use a lot
of generics.

On 26 Okt., 11:00, Thomas Broyer t.bro...@gmail.com wrote:
 On 26 oct, 07:37, Daniel Kurka kurka.dan...@googlemail.com wrote:

  If you have some restrictions on your code on the server side (beeing able
  to run in a 1.4 java enviroment) you can still use java 6 to run gwt. (and
  you should) just make sure to set your javac to compile with java 1.4 as
  target...

 True in theory, but wouldn't you have to recompile the GWT server
 classes (RemoteServiceServlet et al.) with java 1.4 target as well?
 (fortunately something easy to do)

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Re: How do I send program generated Images to my users?

2010-10-26 Thread ep

if your servlet generates an image, why do you want to get it saved on
the disk? I'd also do it the way Daniel suggested, so just keep your
image generating servlet as standalone, better yet allow extensions so
you can inquire an image not only like /imageGenerator but /
imageGenerator.jpg, then you also dont need to explicitely generate
mime header.

so in web.xml you map your generator:

servlet-mapping
..
 url-pattern/imageGenerator/*/url-pattern
/servlet-mapping

and later, if telling the url of the image in the GWT module, you dont
build the url with getModuleBaseUrl(), but rather use host-relative
url, like new Image(/imageGenerator/whatever.jpg)

you can pass the values to your generator either via url params (/
imageGenerator/image.jpg?name=star) or via pathInfo (/imageGenerator/
image/name/star.jpg)

On 25 Okt., 22:36, Greg Dougherty dougherty.greg...@mayo.edu wrote:
 Hi all,

 My servlet is creating images that I need to send to the client.  My
 first thought was save the image to a file, then send the path to that
 image to the client, which can then call new Image
 (GWT.getModuleBaseURL () + imagePath);

 This worked just fine in the development environment.  But when I
 deploy to Tomcat, if I try to use a relative path, it does it from
 where Tomcat was started, rather than from my module's base.  For
 obvious reasons, I'd prefer not to try to save images to a hard-coded
 path (makes it a bit difficult to move the app around).

 Is there a clean way to get my module's base path, so I can save the
 images relative to that?  If not, what IS the approved way to pass
 program generated images to the client?

 TIA,

 Greg

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Re: SuggestBox with huge amount of records

why cant u use it? SuggestOracle allows async fetching of data, please
read java doc on this interface
com.google.gwt.user.client.ui.SuggestOracle.Suggestion

On 21 Okt., 09:09, Florian Rhomberg florian.rhomb...@nettania.at
wrote:
 Hello!

 I need to implement a suggest box. Therefor I found a possibility to create 
 that on this 
 page:http://www.gwtapps.com/doc/html/com.google.gwt.user.client.ui.Suggest...
 But however I cannot use this code with the oracle because I have more than 
 7 datas. Therefore I want to realise this in that way:

 After each character the system should send an rpc call to the server where 
 the server makes a database query and returns the result which is afterwards 
 displayed beneath the textfield.

 Can someone help how such a code would look like in gwt?

 Thanks,
 Florian

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Re: Creating a JSON object in GWT

XMLSerializer is for serializing into XML format... if you want to
JSONize your object you can use overlay types in conjunction with
com.google.gwt.json.client.JSONObject

On 21 Okt., 09:49, Vibhuti Gupta guptavibh...@gmail.com wrote:
 Hello

 I need to create a json object in GWT. I was trying to create a JSON object
 using XMLSerializer but it does not work in GWT.
 Any ideas on this...

 Thanks

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Re: How to develop a modular enterprise application using just GWT

hi, there is already a similiar topic, read ideas on it
http://groups.google.com/group/google-web-toolkit/browse_thread/thread/e73ced6ba51c3def#

On 21 Okt., 11:22, Heidarzadeh heidarzad...@gmail.com wrote:
 Thanks for your response.
 But I think they can!
 I want to deploy BOTH server and client side code together,
 independently for each module, not just client side code, or server
 side code, for each module.
 If I know how to compile one part(module) of my GWT application and
 get the java script output one of the problems will be solved!!
 I think one of My main problems is in the client side and compiling
 GWT application partially and gathering those parts in one context.
 If i have a context that can manage dependencies and showing of these
 modules my main problem will be solved.

 On Oct 21, 11:41 am, dmen dmenou...@gmail.com wrote:

  How GWT and OSGi can be integrated?

  I don't think they can. GWT binaries run in the browser, not in a
  JVM. This also means that, as long your changes do not affect server
  side code, you can redeploy the client GWT code without having to stop
  the server.

  On Oct 21, 9:19 am, Heidarzadeh heidarzad...@gmail.com wrote:

   Hi
   I want to design and develop a big enterprise application using just
   GWT in client side.
   I want to break this enterprise application into parts and I call each
   of them a module (or bundle or portlet or whatever!) . These modules
   might have relation with each other and might call some services that
   exists in other modules (in both client and server side) .
   The problem is, These modules must be Designed , Developed, Compiled
   and Deployed Independently and Dynamically and they will be placed and
   shown together in one context on the client  and the dependencies
   between modules should be manageable (in both client and server side).
   What can I do? What kind of technologies I can use to build an
   enterprise application like this?
   When you develop an application that is not divided into parts (In the
   way that i mentioned) you can easily deploy your application after
   building your project, but when you change just one form in your
   application you have to build the entire application again, and
   deploy  the entire application.
   In this application I cannot stop the server to deploy the application
   again, I want to change and deploy that part of application that is
   needed to be changed not  the entire application!!!
   Of course I have searched about the way that I can solve my problem!!!
   I have found that I can use OSGI on server side because it provides
   modularity at software construction level  and helps me to manage life
   cycle of modules  and many other benefits that you know!
   And I have found that I can use Gadgets on client side.
   What do you think? Are they good choices?
   If they are good choices, how can I start? I know that we have
   different kinds of implementations of OSGi, like Apache Felix, Eclipse
   Equinox and Knopflerfish. Which one is good for this choice?
   How GWT and OSGi can be integrated? How can they interact with each
   other?
   To do this a gadget container is needed on client side!!! I should
   develop it myself or I can use other technologies?

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Re: GWT Help !!!

YES, with some workarounds due to XSS

On 21 Okt., 05:42, alexissua alesca...@gmail.com wrote:
 Hello, Friends.

 Im developing a web application, and i need access to the information
 INSIDE a Web Site that it came as a result of  a google search (this
 information could be for example a text field, or a name, or a price
 of some product inside this page) to save it, or manipulate it, later.
 So, my question is: will i be able to do this with Google Web Toolkit??

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Re: java.lang.ClassCastException .. but why?

since MyMenuBar is-a MenuBar there is an implicit typecast, so you can
do

MenuBar myBar = new MyMenuBar(..)

you can of course downcast the MenuBar to MyMenuBar, if you're sure it
is a MyMenuBar

@alexoffspring

i'm wondering how you initialize the *root* with your MyMenuBar, if
doing this way:

MenuBar root = new MenuItem(MyMenuBar, new MyMenuBar(false));
MyMenuBar myMenuBar = (MyMenubar)root.getSubMenu();

then the cast shall be working like a charm

On 20 Okt., 03:31, Prashant nextprash...@gmail.com wrote:
 you can typecast *MyMenuBar *to *MenuBar *but not the other way round. Here
 you are trying to typecast *MenuBar* to *MyMenuBar*.

 On 19 October 2010 21:28, alexoffspring alessales...@gmail.com wrote:



  Thanks guys.

  Ok, i got the error in the constructor. Now it sounds like this:

   public class MyMenuBar extends MenuBar {

  // super constructor
  public MyMenuBar(boolean bool) {
           super(bool);
  } ;

  But still i got the same ClassCastException.

  root    is a MenuItem   and    root.getSubMenu() return a MenuBar
  object.

  On 19 Ott, 17:39, ep eplisc...@googlemail.com wrote:
   where do you make new MyMenuBar() and how do you provide it to the
   root member? and what type is root actually?

   On 19 Okt., 17:14, alexoffspring alessales...@gmail.com wrote:

I created a public class MyMenuBar   just to use the getItems()
method, which is protected in MenuBar:

public class MyMenuBar extends MenuBar {

        // super constructor
        public MyMenuBar(boolean bool) {
                new MenuBar(bool);
        }

        // the super.getItems() is protected
        public ListMenuItem getItems() {
                return super.getItems();
        }

};



I don't understand why a get a   java.lang.ClassCastException  when i
try to cast a MenuBar into a MyMenuBar:

.
MenuBar menuBar = root.getSubMenu();
local_mmb = ((MyMenuBar) menuBar).getItems();


Where am i wrong?- Nascondi testo citato

   - Mostra testo citato -

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Re: communication between two frames

oh yes, I forgot to mention that innerframes behave like window and
have own javascript namespace so if you're using the default GWT
linker, which loads the application in innerframes and your hosted
page provides your sharedCodeBase.js file, then you should interop via
the top window which initially loaded the hosted page, you can reach
the top window via $wnd.top ( to get the parent of the innerframe you
can also do $wnd.parent )

//register moduleA as listener
$wnd.top.myBus.addListener(SOME_GLOBAL_EVENT, this)

//register moduleB as listener
$wnd.top.myBus.addListener(USER_LOGIN_EVENT, this)

//fire a  LOGIN EVENT from moduleA and moduleB will get notified
$wnd.top.myBus.fire(USER_LOGIN_EVENT, this)


btw:
you have to operate on events described by STRINGs, so they sustain
the obfuscation, therefore you cannot use the HandlerManager class
from GWT as a bus, but rather write your own one, follow the Observer
pattern...watchout further you have to interop via JSON messages
rather than Java classes, remember any API is dead after obfuscation.

but I would really advise you to give a try the code splitting feature
also to minimize the code footprint, and I dont think that GWT is
optimized for this binary deployment model where you can compile
multiple stand-alone runnable modules and than just make them working
together without a new recompilation! of course there're workaround
like above, one can also implement message queue etc but I think you
better should raise a feature request to development team and maybe
they have (or gonna provide) a better solution, which also is
optimized for performance



On 19 Okt., 18:45, aditya sanas 007aditya.b...@gmail.com wrote:
  thanks for ur reply and kind help.
 i am still searching for the right solution.
 I have implemented what u have specified in the la st thread as -
  $wnd.myBus.fire(myModule,initState)
  this works fine  when i m opening both  the modules in different (seperate)
 windows of the same browser. but whenever i try this using inner frame it
 doesn't work as it should be.

 so for guiding purpose if you can  share a code snippet that might help me
 for better understand.

 And yes,we had thought of  code splitting but we couldn't implemented it.

 thanks.
 --
 Aditya

 On Mon, Oct 18, 2010 at 5:28 PM, ep eplisc...@googlemail.com wrote:
  ah ok got your point, well, if you write:

  @com.verisona.bridge.client.CandidateMainView::alertWindow();

  for the GWT compiler is pretty same as a pure Java call - because that
  code is not actually native where as

  $wnd.alert(foo)

  is a real native code which is not handled by GWT compiler. the first
  line would not work cross anonymous modules (such as those which are
  not compiled within same compilation process) since the obfuscator
  will rename all the types/method names. when I've written native i
  really meant pure Java-Code which is not compiled by GWT compiler, but
  rather is supplied from a separate codeBase.js (javascript) file.
  because that code you always can use cross-modules like
  $wnd.myBus.fire(myModule,initState).

  The issue is that you have to compile all available modules in same
  compile process to get them working with each other via compile time
  binding (such as calling ModuleA.refresh() from ModuleB), after
  compilation (with obfuscation) there is no way to reach the code via
  API.

  Have you already tried code splitting feature to minimize the initial
  bootstrap? so that codebase from moduleX is loaded on demand?

  On 18 Okt., 12:25, aditya sanas 007aditya.b...@gmail.com wrote:
   yeah you are right my each of the module is compilable each is having
   entryPoint class associated with it but
   this is how we use to design a GWT module or is it possible to have GWT
   module without EntryPoint class associated with it...?

   actually we were having a single enrty point class for this module before
   but it was making page very heavy.And it was taking more than 10seconds
  each
   time to load when we deploy project online.
   So for this we had decided to split modules and each page will have
   different module associate with it.

   but still we are not able find a solution for communication between two
   modules.
   and i didn't get your last line.

   I m trying this as
   following method is from master class as

   CandidateMainView.java implements EntryPoint
   //...
   public static native void alertWindow()/*-{
    $wnd.alert('hello there i m in main...');

   }-*/;

   and i m trying to access this method from some other class which is
  getting
   loaded into the inner frame.
   CandidateAccountSetting.java implements EntryPoint

   //..
   private native void registerAFunction() /*-{
   @com.verisona.bridge.client.CandidateMainView::alertWindow();

   }-*/;

   this should give an alert but it doesn't work.
   is this what u r suggesting ?

   --
   Aditya

   On Mon, Oct 18, 2010 at 3:26 PM, ep eplisc...@googlemail.com wrote:
actually, you

Re: Avoid Use of Browser Detect

look for BrowserInfo.java in google, the top second entry
(BrowserInfo.java - google-web-toolkit.googlecode.com) or find the
class in repository: com.google.gwt.dev.util.BrowserInfo, that is
under apache 2.0 license, I guess you can modify it to get it working
for detection

On 19 Okt., 22:08, Fredsome aaron@gmail.com wrote:
 After 
 readinghttp://groups.google.com/group/google-web-toolkit/browse_thread/threa...,
 I understand that the Browser Detect code is output into the
 JavaScript code GWT compiles for you. Unfortunately, Browser Detect's
 license is not acceptable for the application that I am working on
 (http://code.google.com/webtoolkit/terms.html#licenses). Is there any
 way to avoid the output of Browser Detect code, so that any product we
 create with GWT will only be affected by the Apache License, v. 2.0?
 Thanks.

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Re: Simulate low bandwith