Re: DominoKit has a new home

[Andrea Stocchero]

well done guys!

Il giorno mercoledì 1 novembre 2023 alle 18:31:31 UTC+1 lofid...@gmail.com 
ha scritto:

> Great work! Congrats!
>
> Vegegoku schrieb am Dienstag, 31. Oktober 2023 um 09:41:19 UTC+1:
>
>> Exciting news — https://dominokit.com is live! Our new platform stands 
>> as a beacon of inclusion, unifying detailed documentation in one 
>> centralized location to empower and educate. We invite you to explore this 
>> collective reservoir of knowledge, designed to support and inspire. Please 
>> help us spread the word by sharing this resource with your network and 
>> beyond. Together, we can create a vast community of shared wisdom and 
>> resources.
>>
>

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Re: JavaFX for GWT

[Andrea Stocchero]

Really interesting

Il giorno martedì 8 novembre 2022 alle 15:37:50 UTC+1 Bruno Salmon ha 
scritto:

> Hi,
>
> I'm working on a JavaFX transpiler powered by GWT.
> It lets you use JavaFX as a UI toolkit in your GWT apps.
> The JavaFX API is far from completely covered, but you can already see 
> some interesting results.
>
> The project is on GitHub for those who are interested.
> https://github.com/webfx-project/webfx
>
> If you have any questions, please let me know.
>

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Re: Wrapping Javascript library (chart.js) using JSInterop

[Andrea Stocchero]

Why don't you use Charba? https://github.com/pepstock-org/Charba

Charba is providing the wrapper of Chart.js for GWT and J2CL.

Il giorno domenica 11 settembre 2022 alle 14:53:25 UTC+2 
manassriv...@gmail.com ha scritto:

> I have added a pom.xml file in the project attached below while running 
> the command - mvn clean install I got an error - Compiling module 
> com.jsinteropdemo.JSInteropDemo
> [INFO][ERROR] Module has no entry points defined
> Also attaching the screenshot of my project folder and default .XML file
> On Sunday, September 11, 2022 at 5:59:36 PM UTC+5:30 m.conr...@gmail.com 
> wrote:
>
>> Check your dependencies. That is an add-on library which must be included 
>> explicitly.
>>
>> On Sun, Sep 11, 2022 at 5:10 AM Manas  wrote:
>>
>>> Hi All,
>>>
>>> Good Day!
>>>
>>> I'm new in GWT and I'm going through documentation and JSInterop. I'm 
>>> facing issues with implementing chart.js using JSInterop. Can anyone guide 
>>> me on how to resolve and keep things working? I am facing an error - "The 
>>> import elemental2 cannot be resolved"
>>>
>>> code is - 
>>> package chartjs;
>>>
>>> import elemental2.dom.HTMLCanvasElement; => facing error on this line
>>> import jsinterop.annotations.JsPackage;
>>> import jsinterop.annotations.JsType;
>>>
>>> @JsType(isNative = true, namespace = JsPackage.GLOBAL)
>>> public class Chart {
>>>
>>> public Chart(HTMLCanvasElement canvasElement, ChartConfiguration 
>>> configuration) {
>>> }
>>> }
>>>
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>>>  
>>> 
>>> .
>>>
>>

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Re: GWT 2.10.0 release

[Andrea Stocchero]

Great!
Thank you Colin and everyone. 

Il giorno venerdì 15 luglio 2022 alle 10:30:30 UTC+2 abhiy...@gmail.com ha 
scritto:

> Hi Priya,
>
> GWT 2.10 has dropped support for  IE 8, 9, and 10. So it will not work 
> unless you modify the Sencha GXT 2.3.1.a.jar
>
> On Thursday, July 14, 2022 at 5:24:08 PM UTC+5:30 priyako...@gmail.com 
> wrote:
>
>> Hello All,
>> Good to see that new version of GWT coming with new features!!!
>> Is the new 2.10.0 GWT version compatible with Sencha GXT 2.3.1.a ? 
>> Will appreciate an early reply! 
>>
>> On Sat, Jul 2, 2022 at 1:40 AM Mihail Krastev  wrote:
>>
>>> Really good job, thanks to everyone involved!
>>>
>>> On Thursday, June 23, 2022 at 7:16:50 PM UTC+3 nilo...@gmail.com wrote:
>>>
 I'm very happy to announce the release of GWT 2.10.0. This is the first 
 release using our new groupId, org.gwtproject, and the final release using 
 com.google.gwt. If you resolve dependencies from Maven Central, please be 
 certain that your project is using com.google.gwt:gwt (or 
 org.gwtproject:gwt) as a BOM, so that you are certain to have consistent 
 versions of gwt-user and gwt-dev, even across groupIds.

 For this release, either groupId will work, but future releases will 
 only be made on the org.gwtproject groupId.

 The zip download of the GWT SDK is available at 
 https://github.com/gwtproject/gwt/releases/download/2.10.0/gwt-2.10.0.zip

 --

 Release notes for GWT 2.10.0, taken from 
 https://www.gwtproject.org/release-notes.html#Release_Notes_2_10_0

 Highlights 

- 

Updated to HtmlUnit 2.55.0 and Jetty 9.4.44. With this newer 
HtmlUnit build comes support for Promise in unit tests, and the browser 
strings that can be specified when running tests are “FF”, “Chrome”, 
 “IE” 
(for IE11), “Edge”, and “Safari”.
- 

Tested support for running on Java 17, dropped remaining support 
for running on Java 7.
- 

Maven groupId is formally changed to org.gwtproject, projects 
should take care to make sure they are using either the old 
com.google.gwt:gwt BOM or the new org.gwtproject:gwt BOM to sure 
that Maven or Gradle correctly handle this change. This will be the 
 last 
published version using the com.google.gwt groupId.
- 

Dropped support for IE 8, 9, and 10.

 Bug fixes 

- Correct Long.hashCode semantics
- Support CLASSPATH environment variable when creating child 
processes, fixing a bug where Windows could fail with a long list of 
arguments.
- Use Function.name instead of displayName to support visible 
method names in Chrome 93+.
- Allow stack traces to be available in Chrome when loading scripts 
from a remote origin.

 JRE Emulation 

- Added OutputStreamWriter emulation.
- Support StringReader mark() and reset() methods.
- Added StrictMath emulation.
- Added BufferedWriter emulation.
- Added incomplete PrintStream emulation.
- Add Charset.defaultCharset() emulation.
- Improve BigInteger emulated performance.
- System.nanoTime() emulation with performance.now().
- Added Optional.isEmpty emulation.
- JRE Emulation improvements/simplifications to facilitate J2CL’s 
WASM support. Note that these do not always offer specific improvements 
 to 
GWT itself, but helps to keep the codebases consistent.

 Miscellaneous 

- Add support to compile GWT itself in Java 9+.
- Improve compiled code size for applications that never use 
streams, by avoiding referencing streams from Throwable.

 For more detail, see the commit log 
 .

>>> -- 
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>>> Groups "GWT Users" group.
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>>>  
>>> 
>>> .
>>>
>>
>>
>> -- 
>> Life is Beautiful..
>> Keep Smiling
>> Priya..
>>
>

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Re: [ANN] Akasha: Typed Browser API

[Andrea Stocchero]

For INTL Number and Date format, there is an implementation here: 
https://github.com/pepstock-org/Charba/tree/master/src/org/pepstock/charba/client/intl
If you are not using that chart lib, it could be a starting point.


Il giorno martedì 15 giugno 2021 alle 00:54:56 UTC+2 peter.j...@gmail.com 
ha scritto:

> On Tue, Jun 15, 2021 at 6:59 AM foal  wrote:
>
>> Hi, do you have support for Intl API? 
>
>
> Not as yet. It is a javascript specification rather than a browser 
> interface specification which means there is no WebIDL to use to generate 
> the API. This would mean I would need to write the WebIDL or manually 
> construct the jsinterop types ... which looks easy enough ... but I have 
> yet to get to it ;)
>
> -- 
> Cheers,
>
> Peter Donald
>

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Re: Can I create GWT Widget in javascript code?

[Andrea Stocchero]

Charba is a library which is wrapping CHART.JS to provide charts in GWt and 
J2Cl appliation and for GWT a chat can be a widget. Almost everything by 
JSINTEROP.

https://github.com/pepstock-org/Charba/tree/master/src/org/pepstock/charba/client/gwt/widgets

https://github.com/pepstock-org/Charba

Il giorno martedì 2 marzo 2021 alle 15:48:08 UTC+1 Boris Brudnoy ha scritto:

> Would vue-gwt (https://github.com/VueGWT/vue-gwt) help your scenario?
>
> *Boris Brudnoy*
> Web Software Engineer | LinkedIn  
> | StackOverflow 
> I created RecipeLot.com, a companion for culinary enthusiasts. Check it 
> out.
>
>
> On Tue, Mar 2, 2021 at 5:43 AM Zhang Alex  wrote:
>
>> since now not yet!
>> I have a large application build with gwt 2.8 + Gxt
>> recently, other company need integration  some UI  into it's web 
>> application, eg:  div
>> Does JsInterop suitable my Scene
>> Thank for your example case
>> 在2021年3月2日星期二 UTC+8 下午4:58:00 写道：
>>
>>> Never wrap a Widget with JsInterop before... but just like in this 
>>> article I wrapped a Calculator with JsInterop so that afterwards I could 
>>> use it from JavaScript. 
>>>
>>> https://bit.ly/WebJavaStory
>>>
>>> Did you try to wrap your Widget with JsInterop?
>>>
>>> alex...@gmail.com schrieb am Dienstag, 2. März 2021 um 05:09:24 UTC+1:
>>>
 For example:
  I have a vue app and classic gwt application,  The gwt application 
 have lot of module .
 but I only want to one module (eg: A query UI) integration  to my vue 
 app using js
 How can I done this?
 Tks.


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>>  
>> 
>> .
>>
>

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Re: Why Don’t You Use Java for Programming the Client-Side Web Apps on Web Browser?

[Andrea Stocchero]

Sorry Lofi, I misunderstood you.

Fully agree with you!

Il giorno martedì 29 settembre 2020 alle 10:56:26 UTC+2 lofid...@gmail.com 
ha scritto:

> Ahh, I mean not only "Maven" just a *build tool* like Maven, Gradle, 
> Buildr, Bazel, Ivy or whatever... 
>
> The main thing we need to *manage the dependencies and versions*.
>
> Just putting those Jar files in your project and only depends on IDE 
> dependent plugins won't help in mid term, IMHO.
>
> stock...@gmail.com schrieb am Dienstag, 29. September 2020 um 09:57:24 
> UTC+2:
>
>>
>> Lofi, 
>>
>> https://github.com/pepstock-org/Charba is not using Maven and it's using 
>> Ivy.
>>
>> Also I'm not using it for my applications. I had to use it for the Charba 
>> J2CL showcase where I'm leveraging on J2CL maven plugin. 
>>
>> Il giorno martedì 29 settembre 2020 alle 09:40:22 UTC+2 
>> lofid...@gmail.com ha scritto:
>>
>>> Actually I don't see any Java apps should work without Maven:
>>>
>>>- Why won't you use Maven? At the end everyone has to *manage 
>>>dependencies* / *versions* and today you need such a tool like Maven.
>>>
>>> Yes, design patterns are language independent.
>>>
>>> Did you use pdf.js? And this is actually a very important part of GWT / 
>>> J2CL development. In such a case we should always offer an Open Source lib 
>>> for *JsInterop*, just like *DefinitelyTyped* in TypeScript... I found a 
>>> GWT project for pdf.js but it still using JSNI: 
>>> https://github.com/pandurangpatil/gwt-pdfjs
>>>
>>> I think, I'll open a GitHub project for the list of libraries for GWT, 
>>> similar to *DefinitelyTyped but only a link list...*
>>>
>>> As you said, if everyone support implementing *JsInterop files for 
>>> JavaScript libs* it will be very easy for Java developers to use them 
>>> and they don't need to write the JsInterop files for x times...
>>>
>>> Thanks,
>>> Lofi
>>> rmr...@gmail.com schrieb am Dienstag, 29. September 2020 um 01:06:29 
>>> UTC+2:
>>>
 Hello Lofi,

 Some loose comments:

 - Another great advantage I enjoy is that I don't need Maven. Can you 
 rewrite your example _without_ depending on Maven? And without using a 
 library that relies on annotations?

 - VisualStudio code is great for Java and JavaScript. You can also use 
 Eclipse with Java and JavaScript, but it is not as fast.

 - Design patterns are language independent. You can use them with Java, 
 TypeScript, C++ or whatever you like.

 - Although there tons of libraries you can use on the server side, Java 
 has limited options as a client in a browser. For example, in one of my 
 projects I need to display a PDF in the browser and manipulate its text 
 content depending on certain user actions; there aren't Java libraries 
 that 
 can work in the browser and are good enough for the task.

 Regards,
 Rodolfo


 On Mon, Sep 28, 2020 at 7:09 PM lofid...@gmail.com  
 wrote:

> OK, now I understand you 
>
> Yes, we always have to separate the Client and the Server part. This 
> is also GWT best practice.
>
> But if you are using JavaScript on browser you lose the advantages 
> like:
>
>1. We use *Java* as the language
>2. We have the best *ecosystem* like libraries, frameworks, build 
>system and IDEs.
>3. We know best design patterns to make our apps maintainable like 
>Dependency Injection, Mock Testing and many other just take a look at: 
>http://bit.ly/DesignPatternsJava
>4. … and if you use Java on the server-side with *Spring Framework*
> or *JavaEE* you have *one language* through the whole stack. So, 
>you could reuse Validation APIs, Business Rules, Business Model, etc. 
> from 
>server to client.
>
> I've built this sample project: 
> https://github.com/gwtboot/domino-rest-enum-date to show some reuse 
> for Client and Server and I plan to write more articles on this topic: 
> Dependency Injection, Mocking Test, Validation API, Business Rules - all 
> from Server to Client.
>
> This type of reuse cannot be done if you are using JavaScript / 
> TypeScript on the web browser...
>
> Thanks,
> Lofi
> rmr...@gmail.com schrieb am Montag, 28. September 2020 um 23:20:23 
> UTC+2:
>
>> If the server part is a Java servlet that handles REST calls, there 
>> is no need for GWT at all. No need to deal with JSInterop and no need to 
>> deal with annotations, that's cleaner code!
>>
>> If you have a server that exposes a REST API, you can write the 
>> client in anything. JavaScript is great in the browser and TypeScript 
>> improves the coding experience while sharing direct use of JavaScript 
>> libraries.
>>
>> Running a Java client in the browser implies extra steps and 
>> complications. First and foremost, you can't mix Java and 

Re: Why Don’t You Use Java for Programming the Client-Side Web Apps on Web Browser?

[Andrea Stocchero]

Sorry Lofi,



Il giorno mar 29 set 2020 alle ore 10:57 lofid...@gmail.com <
lofidewa...@gmail.com> ha scritto:

> Ahh, I mean not only "Maven" just a *build tool* like Maven, Gradle,
> Buildr, Bazel, Ivy or whatever... 
>
> The main thing we need to *manage the dependencies and versions*.
>
> Just putting those Jar files in your project and only depends on IDE
> dependent plugins won't help in mid term, IMHO.
>
> stock...@gmail.com schrieb am Dienstag, 29. September 2020 um 09:57:24
> UTC+2:
>
>>
>> Lofi,
>>
>> https://github.com/pepstock-org/Charba is not using Maven and it's using
>> Ivy.
>>
>> Also I'm not using it for my applications. I had to use it for the Charba
>> J2CL showcase where I'm leveraging on J2CL maven plugin.
>>
>> Il giorno martedì 29 settembre 2020 alle 09:40:22 UTC+2
>> lofid...@gmail.com ha scritto:
>>
>>> Actually I don't see any Java apps should work without Maven:
>>>
>>>- Why won't you use Maven? At the end everyone has to *manage
>>>dependencies* / *versions* and today you need such a tool like Maven.
>>>
>>> Yes, design patterns are language independent.
>>>
>>> Did you use pdf.js? And this is actually a very important part of GWT /
>>> J2CL development. In such a case we should always offer an Open Source lib
>>> for *JsInterop*, just like *DefinitelyTyped* in TypeScript... I found a
>>> GWT project for pdf.js but it still using JSNI:
>>> https://github.com/pandurangpatil/gwt-pdfjs
>>>
>>> I think, I'll open a GitHub project for the list of libraries for GWT,
>>> similar to *DefinitelyTyped but only a link list...*
>>>
>>> As you said, if everyone support implementing *JsInterop files for
>>> JavaScript libs* it will be very easy for Java developers to use them
>>> and they don't need to write the JsInterop files for x times...
>>>
>>> Thanks,
>>> Lofi
>>> rmr...@gmail.com schrieb am Dienstag, 29. September 2020 um 01:06:29
>>> UTC+2:
>>>
 Hello Lofi,

 Some loose comments:

 - Another great advantage I enjoy is that I don't need Maven. Can you
 rewrite your example _without_ depending on Maven? And without using a
 library that relies on annotations?

 - VisualStudio code is great for Java and JavaScript. You can also use
 Eclipse with Java and JavaScript, but it is not as fast.

 - Design patterns are language independent. You can use them with Java,
 TypeScript, C++ or whatever you like.

 - Although there tons of libraries you can use on the server side, Java
 has limited options as a client in a browser. For example, in one of my
 projects I need to display a PDF in the browser and manipulate its text
 content depending on certain user actions; there aren't Java libraries that
 can work in the browser and are good enough for the task.

 Regards,
 Rodolfo


 On Mon, Sep 28, 2020 at 7:09 PM lofid...@gmail.com 
 wrote:

> OK, now I understand you 
>
> Yes, we always have to separate the Client and the Server part. This
> is also GWT best practice.
>
> But if you are using JavaScript on browser you lose the advantages
> like:
>
>1. We use *Java* as the language
>2. We have the best *ecosystem* like libraries, frameworks, build
>system and IDEs.
>3. We know best design patterns to make our apps maintainable like
>Dependency Injection, Mock Testing and many other just take a look at:
>http://bit.ly/DesignPatternsJava
>4. … and if you use Java on the server-side with *Spring Framework*
> or *JavaEE* you have *one language* through the whole stack. So,
>you could reuse Validation APIs, Business Rules, Business Model, etc. 
> from
>server to client.
>
> I've built this sample project:
> https://github.com/gwtboot/domino-rest-enum-date to show some reuse
> for Client and Server and I plan to write more articles on this topic:
> Dependency Injection, Mocking Test, Validation API, Business Rules - all
> from Server to Client.
>
> This type of reuse cannot be done if you are using JavaScript /
> TypeScript on the web browser...
>
> Thanks,
> Lofi
> rmr...@gmail.com schrieb am Montag, 28. September 2020 um 23:20:23
> UTC+2:
>
>> If the server part is a Java servlet that handles REST calls, there
>> is no need for GWT at all. No need to deal with JSInterop and no need to
>> deal with annotations, that's cleaner code!
>>
>> If you have a server that exposes a REST API, you can write the
>> client in anything. JavaScript is great in the browser and TypeScript
>> improves the coding experience while sharing direct use of JavaScript
>> libraries.
>>
>> Running a Java client in the browser implies extra steps and
>> complications. First and foremost, you can't mix Java and JavaScript
>> libraries without wasting a lot of time with compatibility layers. 

Re: Why Don’t You Use Java for Programming the Client-Side Web Apps on Web Browser?

[Andrea Stocchero]

First of all, let me say I'm a Java developer and I'm using GWT since years.

Having started developing java since 1996 (with java 1.0.2), I have seen 
many technologies and frameworks to help a java developer can use to build 
a UI on web browser (like applets, servlets, jsp, jsf, webstart).
I have met GWT many years ago and it was for me the right answer to my 
questions to develop by a single programming language both client and 
server sides.
And I'm still using.

Nevertheless there are some pain points that it's important do not 
under-estimate.

1. Java developer has to have some skills HTML, CSS and Javascript as well. 
2. Usage of JSinterop to map a javascript code is not trivial even if it's 
complex. It's time consuming (time that you don't have to spend using 
Javascript).
3. GWT widgets should be modernized (even if there are other frameworks 
like Domino and GWT Materials but adding complexity).
4. Java code must be well designed in order to be efficient. Javascript 
(for its nature) allows you to develop very fast (time means cost).

In my opinion there are other reasons why Java developers during last years 
preferred to learn javascript for UI, like the unclear GWT future and 
roadmap, but maybe less important.

Il giorno giovedì 24 settembre 2020 alle 21:02:18 UTC+2 lofid...@gmail.com 
ha scritto:

> I would like to know, what are the *obstacles* for you as *Java 
> developers* not using *Java as programming language for writing Web 
> browser apps*. Web browser apps are client-side and *not server-side* Web 
> apps. 
>
>- Open discussion at https://bit.ly/HackerNewsTypeScriptJavaGWT
>- Article at https://bit.ly/TypeScriptVsJavaGWT
>
> I would like to know from you... Java developers...
>
> Thanks, Lofi
>
>
>

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Accessing "basic" JS Object in JsInterop callback

[Andrea Martino]

Hi all,
I have recently started testing JsInterop for our GWT 2.8.1 application and 
I have encountered a situation I could not solve without using the old 
style JSNI approach.

Consider the following minimal JS library I would like to use in Java/GWT:

(function (window, document, undefined) {

function WatchDog(name) {
this._name = name;
};

WatchDog.prototype.register = function(callback) {
this._callback = callback;
};

WatchDog.prototype.broadcast = function(msg) {
if (this._callback) {
this._callback({
'name' : this._name,
'timestamp' : new Date().getTime(),
'msg' : msg
});
}
};

window.Dummy = {
watchDog : function(name) {
return new WatchDog(name); 
}
};

}(window, document));

Please note that the broadcast function passes a "basic" JS Object {} (i.e. 
without a specific prototype) to the callback function.

Here below my JsInterop mappings:

package xxx;

import jsinterop.annotations.JsPackage;
import jsinterop.annotations.JsType;

@JsType(isNative = true, namespace = JsPackage.GLOBAL)
public class Dummy {
private Dummy() {}
public static native WatchDog watchDog(String name);
}

package xxx;

import jsinterop.annotations.JsMethod;
import jsinterop.annotations.JsType;

@JsType(isNative = true)
public class WatchDog {
private WatchDog() {}
@JsMethod
public native void register(Callback callback);
@JsMethod
public native void broadcast(String msg);
}

package xxx;

import jsinterop.annotations.JsFunction; 

@JsFunction 
public interface Callback { 
void call(Object event); 
}


In my Java code, when the callback function is invoked, the event parameter 
is an instance of com.google.gwt.core.client.JavaScriptObject.

Without using JSNI I am not able to access/read the object's properties. 
Does JsInterop addresses this scenario without falling-back to old style 
JSNI?

Thanks a lot in andvance
Andrea

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Re: Unable to access exported JsType from JavaScript

[Andrea Spadaccini]

Hi,
 

> Looking at your code, the class would be available at "blah.WebUI", but 
> you'd have to create a new instance before your can call your method, and 
> given how you initialize it you'd have to call onModuleLoad before that.
> Maybe if you make your method and all the fields 'static' that'd work; 
> either that or move the initialization in the class constructor (and maybe 
> use another class as the EntryPoint to avoid a double initialization).
>

Thanks for the pointer, it works! I can do the following in JS:

x = new blah.WebUI();
x.onModuleLoad();
x.runAndGetRegisters();

I don't know how I missed it. :)

Again, thanks a lot for the pointer.

Cheers,
Andrea

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Re: Unable to access exported JsType from JavaScript

[Andrea Spadaccini]

Hi,
 

> Did you forgot to add -generateJsInteropExports to the compiler parameters?
>

I set it for both devmode and production 
code: https://github.com/lupino3/edumips64/blob/jsinterop/build.xml#L104

Is it set in the right way?

Thanks!
Andrea

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Unable to access exported JsType from JavaScript

[Andrea Spadaccini]

Hi everyone,
I am trying to port my CPU simulator from Java to Javascript, and I am 
using GWT for it. Thanks for the awesome work!

I'd like to just expose a single Java object to JS, and then build the UI 
using HTML/CSS/. To do so, I think I need to use 
JsInterop, right?

I am trying to do so, without success.

My code 
(https://github.com/lupino3/edumips64/blob/jsinterop/src/main/java/org/edumips64/client/WebUi.java)
 
compiles to JS and I can see the code running and producing output in the 
Chrome console. However, I can't find a way to access the 
WebUI.runAndGetRegisters() method from the Chrome console. Once that works, 
I can set up a better interface between JS and Java, but first I'd like to 
be able to execute one single method.

Given my current use of JsType, under what name should I be able to run the 
WebUI.runAndGetRegisters() method?

Thanks in advance,
Andrea

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Re: in GWT, can we manage Messages Constants (i18n) at Server as we manage at Client?

[Andrea Boscolo]

On Friday, March 7, 2014 10:30:50 AM UTC+1, Thomas Broyer wrote:


 There are also a few projects that directly try to use your GWT interfaces 
 on server-side; and it's also a planned feature of GWT proper (no ETA yet).


Just curious, but what about https://gwt-review.googlesource.com/#/c/1550/ 
? An old commit (still not merged), but is it supposed to help in this way? 
Theoretically it should, but I can't quite 'grasp' all the bits from such a 
big change. I guess it was before the GWT.create() on the server era, but 
again, I'm curious about its future.

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Re: in GWT, can we manage Messages Constants (i18n) at Server as we manage at Client?

[Andrea Boscolo]

Ok, got it.
Thank you for the explanation.

On Friday, March 7, 2014 6:13:19 PM UTC+1, Thomas Broyer wrote:


 It is one step towards I18N on the server. GWT.create() on the server 
 was one such other steps. The last one being generating Messages, 
 Constants, etc. implementations for use on the server side, that the 
 GWT.create() on the server could load when called with your I18N 
 interfaces.
 I can't really tell about the future of this patch, as it's a contribution 
 from an ex-Googler and he probably doesn't have much free time left to 
 contribute such big changes to GWT. But the future of GWT.create() seems to 
 be that same approach: use annotation processors to generate 
 implementations of your interfaces and then GWT.create() will only have to 
 pick the appropriate class for the given interface (no more generator run 
 during the GWT compilation). It's still a long way before we reach that 
 stage though (with probably a lot of breaking changes: GWT generators 
 didn't use to be triggered by annotations, but annotation processors are 
 harder –not impossible though– to trigger on anything else than 
 annotations, so we –as users– might have to change our code to at least 
 introduce annotations here and there to trigger the annotation processors).


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Re: GWT - Send a message from the server to the client?

[Andrea Boscolo]

I'd use http://errai.github.io/ and its bus.

On Monday, October 28, 2013 10:01:27 PM UTC+1, Joshua Godi wrote:

 Good afternoon,

 I was curious how I would properly send a message from the server to the 
 client? Here is my scenario:

 Client A - Modifies User1 from the GUI and pushes the data to the server
 Client B - Is looking at User1 and needs to be notified that there are 
 changes that have been made

 So the server needs to send a message to all clients that the user has 
 changed.

 What is the best way to solve this?

 Thanks,
 Joshua


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Re: GWT 2.5.1 now available

[Andrea Boscolo]

See 
https://groups.google.com/d/topic/google-web-toolkit-contributors/Sljy8sRR3Io/discussion
According to the timeline there will be a RC on 4th of November and 
subsequent RCs only if needed. The final release should be out on 2nd of 
Dec.

On Friday, September 27, 2013 4:37:35 PM UTC+2, Ed wrote:

 When will release 2.6 will come out? (4 nov?)


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Re: GWT JettyLauncher.java How to enable SSL programaticly

[Andrea Boscolo]

Or, enable the SSL support of the embedded Jetty server.
See 
http://stackoverflow.com/questions/6370919/how-to-enable-https-in-gwts-jetty 
and 
http://stackoverflow.com/questions/15791758/run-gwt-with-https-enabled/15793359#15793359

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Re: Custom cell in CellTable with TextCell and SelectionCell

[Andrea Boscolo]

A quick view reveals you haven't consumed the desired events in the cell's 
constructor. Something like:

public CustomStatusCell() {
  super(click, keydown); // And so on.
  // ...
}


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Re: Google GWT with Eclipse eats up disk space -

[Andrea Boscolo]

If you are using Windows, I guess you hit 
http://code.google.com/p/google-web-toolkit/issues/detail?id=5261 (related 
to 
https://code.google.com/p/google-plugin-for-eclipse/issues/detail?id=74). 
In the first link you can find the folders to clean, as well as some useful 
scripts to use from time to time.

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Re: DataGrid and using Event.setCapture to implement column resizing.

[Andrea Boscolo]

Not an answer to your problems, but other people in the past have followed 
the same road. Have a look at 
http://code.google.com/p/google-web-toolkit/issues/detail?id=6401

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Re: Anchor does not work in IE - very strange problem!

[Andrea Boscolo]

Audio element is supported from IE  8 according to 
thishttp://caniuse.com/#search=audio
.
Always use the static method isSupported() for all 
@PartialSupporthttp://www.gwtproject.org/javadoc/latest/com/google/gwt/dom/client/class-use/PartialSupport.htmlclasses
 for runtime check.

On Monday, June 24, 2013 7:21:07 PM UTC+2, Magnus wrote:

 Hi,

 setting the compiler mode to pretty did not result in a more 
 comprehensive error message:

 com.google.gwt.core.client.JavaScriptException: (TypeError)
 description: 'null.nullField' ist Null oder kein Objekt

 But I finally found the nullpointer exception by tracing. It happened in 
 the newly added code for audio:

 private Audio snd_Move = Audio.createIfSupported ();
 ...
 snd_Move.setSrc(...); // snd_Move is null!!!

 So the original problem is solved now. Many thanks for all the advices!

 Last questions:
 - Why isn't this exception alerted with a comprehensive message, without 
 calling setUncaughtExceptionHandler, like other client-side exceptions?
 - The fact, that Audio.createIfSupported () returns null: Does this mean 
 that IE 8/9 does not support audio at all?

 Magnus



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Re: How to add an icon to MenuItem?

[Andrea Boscolo]

You don't need to extend MenuItem. See 
http://stackoverflow.com/questions/16399241/how-to-add-an-icon-to-a-menuitem-in-gwt

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Re: GWT 2.5.1 - Incubator Deprecated Classes

[Andrea Boscolo]

Unfortunately I can't say much about ADA and 508 compliance, but the 
CellTable/DataGrid supports ARIA http://www.w3.org/TR/wai-aria/attributes 
(see 
docs https://developers.google.com/web-toolkit/doc/latest/DevGuideA11y). 
Also, such grids are the only enterprise grid officially supported by GWT, 
that means a lot when it comes to accessibility and browser support.

Also, the Incubator has been deprecated long time ago (even before GWT 2.4) 
and it was a parallel project from Google, not a component nor a dependency 
of GWT. See the official 
statementhttps://groups.google.com/forum/?fromgroups=#!searchin/google-web-toolkit-contributors/incubator/google-web-toolkit-contributors/a3_TpzXelS0/fv1sP7UrEj4Jof
 its deprecation.

The refactoring can be quite hard sometimes especially because it involves 
a logic (and practical) switch, from widgets to cells. But (cells apart) 
the amount of code needed to create the table, add fetching + paging 
support, is substantially cleaner and less cumbersome.

All the things under com.google.gwt.gen2.table.* are somewhat relative to 
ScrollTable and PagingScrollTable, but unfortunately there is no drop-in 
replacemente for the ValueSpinner. But it shouldn't be hard to find or 
create a new one from scratch.

And you can keep using the incubator, but at your own risk :) I do not know 
if the GWT 2.1-compatible jar is still usable with the latest release, I 
guess not, so you need to build the incubator on your own and keep fixing 
the compiling issues (as explained 
herehttp://code.google.com/p/google-web-toolkit-incubator/wiki/MakingIncubatorBetter
).

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Re: GWT 2.5.1 - Incubator Deprecated Classes

[Andrea Boscolo]

By the errors above, I guess you need to move from Paging/ScrollTable to 
DataGrid (or CellTable). But it is not a matter of changing imports. The 
APIs are quite different, you need to refactor in order to move to 
DataGrid. You can start from 
herehttps://developers.google.com/web-toolkit/doc/latest/DevGuideUiCellWidgets#celltable(the
 same applies to DataGrid which is a CellTable with fixed 
headers/footers). For paging/retrieving data see 
herehttps://developers.google.com/web-toolkit/doc/latest/DevGuideUiCellWidgets#Selection_Data_Paging(the
 same applies for all cell widgets). For column sorting and width 
adjusting see 
herehttps://developers.google.com/web-toolkit/doc/latest/DevGuideUiCellTable(the
 same applies for DataGrid). For custom/multiline header/footer/lines 
there are unfortunately no official docs, but you can checkout the custom 
data grid showcase 
samplehttp://gwt.googleusercontent.com/samples/Showcase/Showcase.html#!CwCustomDataGrid.
 
Also do note that the old PagingScrollTable is based on widgets, whereas 
the new DataGrid is based on 
cellshttps://developers.google.com/web-toolkit/doc/latest/DevGuideUiCellWidgets
.

What are the other classes you used but not listed in the incubator's page?

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Re: columnSortHandler on a Dynamic CellTable

[Andrea Boscolo]

Also, it looks like 
https://groups.google.com/forum/?start=hl=en#!topic/google-web-toolkit/7CFHEhWUjQA[1-25-false]
 
and 
http://stackoverflow.com/questions/16146094/gwt-columnsorthandler-setcomparator-for-all-columns-in-a-loop-make-the-sorting

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Re: JavaDocs are out of date?

[Andrea Boscolo]

See https://plus.google.com/111739836936169749229/posts/7ZYGmbTE5WE

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Re: Multiple instances of a view

[Andrea Boscolo]

This is how GIN works, it always inject a new instance when requested. If 
you want to inject the same instance, bind the dependency into Singleton 
scope, using bind(YourClass.class).in(Singleton.class), inside you 
GinModule.

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Re: moveable areas as in iGoogle?

[Andrea Boscolo]

You need some kind of drag  drop functionality. You can either use the 
built-in GWT drag  drop support (which is based on the HTML5 drag  drop 
API [1]), or use the always handy gwt-dnd [2]. Do note that HTML5 dd API 
is about moving data, not actual widgets, but it can be used also in that 
way, instead with gwt-dnd you really move things around. See the showcase 
[3], in which you can find some useful samples that may work for you.

[1] http://www.html5rocks.com/en/tutorials/dnd/basics/
[2] http://code.google.com/p/gwt-dnd/
[3] https://gwt-dnd.appspot.com/#InsertPanelExample
On Wednesday, April 10, 2013 12:33:33 PM UTC+2, Magnus wrote:

 Hi,

 how can one realize such moveable areas, which can be placed with drag  
 drop at predefined positions, such as in iGoogle?

 Is there a tutorial?

 Thanks
 Magnus


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Re: How to globally catch all exceptions?

[Andrea Boscolo]

Use the GWT.setUncaughtExceptionHandler() [1].

[1] 
http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/core/client/GWT.html#setUncaughtExceptionHandler%28com.google.gwt.core.client.GWT.UncaughtExceptionHandler%29

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Re: Removing obfuscation from a stack trace.

[Andrea Boscolo]

Read the StackTraceDeobfuscator doc [1], you are either missing the -deploy 
dir argument for creating the symbolMaps, or it is not in the right place.

[1] 
http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/logging/server/StackTraceDeobfuscator.html

On Tuesday, April 9, 2013 5:06:23 PM UTC+2, Flying-w wrote:


 I've implemented server side logging of client side exceptions, by making 
 the following changes in gwt.xml:
 set-property name=compiler.stackMode value=emulated /
 set-configuration-property 
 name=compiler.emulatedStack.recordLineNumbers value=true /
 set-configuration-property 
 name=compiler.emulatedStack.recordFileNames value=true /

 A custom implementation SimpleRemoteLogHandler provides the handler to 
 relay the messages to the server.

 And a servlet:
 servlet
 servlet-nameremoteLogging/servlet-name

 servlet-classcom.google.gwt.logging.server.RemoteLoggingServiceImpl/servlet-class
 init-param
 param-namesymbolMaps/param-name
 param-valueshark_sencha_prototype/symbolMaps/param-value
 /init-param
 /servlet
 servlet-mapping
 servlet-nameremoteLogging/servlet-name
 url-pattern/shark_sencha_prototype/remote_logging/url-pattern
 /servlet-mapping


 When an exception occurs (for example an operation on a null string), the 
 stack trace below is typical of what shows up.  I 
 was expecting RemoteLoggingServiceImpl to fully remote the obfuscation, 
 however is this as good as it gets?
 It feels like there should me more, as it's doing nothing more than 
 mirroring what can also be reported on the client concerning the exception.

 com.google.gwt.core.client.JavaScriptException: (TypeError): Cannot call 
 method 'Bl' of null

 Unknown.he(StackTraceCreator.java:174)

 Unknown.Oc(StackTraceCreator.java:501)

 Unknown.uS(Exceptions.java:29)

 Unknown.Zid(JobsTab.java:293)

 Unknown.Kfd(CategoryTabs.java:81)

 ...


 Thanks

 Simon


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Re: Displaying a Label with icon?

[Andrea Boscolo]

For a widget-based solution, without rolling out something in-house, my 
preferred approach is to use TextButton [1].
Note that there is not a direct method to setup the icon of the inner cell, 
so you have to subclass TextButton and add a simple method like:

public void setIcon(ImageResource icon) {
  ((TextButtonCell) getCell()).setIcon(icon);
}

Such button extends CellWidget and is backed by a cell that supports the 
Appearance pattern [2].
Also it support border collapse in order to make a button-bar-like set of 
buttons, and also primary/negative styles to let a button stand out.

[1] 
http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/widget/client/TextButton.html
[2] http://code.google.com/p/google-web-toolkit/wiki/CellBackedWIdgets

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Re: Uncaught umbrella exception.

[Andrea Boscolo]

For the annotation processor, put requestfactory-apt.jar in you classpath 
and you should be ok.
If you want to manually run it, see the official wiki [1], where you can 
find the command line, maven and ant (in comments) instructions.

[1] 
http://code.google.com/p/google-web-toolkit/wiki/RequestFactoryInterfaceValidation#ValidationTool

On Sunday, April 7, 2013 2:39:32 PM UTC+2, Aman Sharma wrote:

 Thanks Thomas.

 Your solution is right.

 Now I have to do this 
 http://vivagwt.blogspot.in/2011/09/requestfactory-en-gwt-24.html but how 
 do I add requestfactory-apt.jar annotation processor to my project 
 manually. Instructions on this link is for only Eclipse.


  And also do I have to define a getter method even I am not using it just 
 to prevent those Umbrella Exceptions?


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Re: Changes Opacity for vertical scrollbar inside 2.4 DataGrid?

[Andrea Boscolo]

Good, another two suggestions:

- if you do not want opacity/transition, simply use 
NativeVerticalScrollbar.Resources as-is;
- in order to reliably know the right scrollbar width/height (in case you 
want to stick with a native scrollbar), you can use the static methods 
AbstractNativeScrollbar.getNativeScrollbarWidth() for the vertical 
scrollbar, and AbstractNativeScrollbar.getNativeScrollbarHeight() for the 
horizontal one.

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Re: Changes Opacity for vertical scrollbar inside 2.4 DataGrid?

[Andrea Boscolo]

DataGrid uses a CustomScrollPanel for its data table. Such panel uses 
transparent-style native scrollbars, but the resources used 
(NativeVerticalScrollbar.ResourcesTransparant) are hardcoded in the 
CustomScrollPanel constructor. I guess you can:

- extend the DataGrid to obtain a reference of the inner CustomScrollPanel. 
See [1] on how to do that;
- extend the default NativeVerticalScrollbar.ResourcesTransparant to 
provide your own style (or use the no-op NativeVerticalScrollbar.Resources 
to remove any opacity);
- in the extended DataGrid constructor, after super(), use the 
CustomScrollPanel reference to set up a new scrollbar using the method 
setVerticalScrollbar(...) passing in a new NativeHorizontalScrollbar with 
your new resources.

The same applies for the horizontal scrollbar.

Or you can look at the DOM and figure out some hack to obtain the scrollbar 
container (as you tried).

[1] 
https://groups.google.com/forum/#!msg/google-web-toolkit/cdB07DEtmXU/9TNb72MI3Q4J

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Re: Drag and drop (and Internet Explorer)

[Andrea Boscolo]

Check if DragDropEventBase.isSupported() and if not, stop trying :D 
According to [1] is not supported by ie6 and ie8 and there is a 'maybe' for 
everything else.

I can't see where the problem could be, you are doing the right things:
- set the element draggable;
- add a dragstarthandler to the element and use setData(...) in it;
- add a dragoverhandler on the element target;
- add a drophandler on the element target, use preventDefault() and consume 
the data with getData() (you are not doing that tough, hence try it).
See [2] from slide 54.

Then I'd try to use the native handlers (e.g, addDropHandler() and so on, 
instead of addDomHandler()) if supported by the widget. Or change the 
target widget. Also, as suggested in the commit [3], try to select the text 
before start to drag.

Can't say anything else, at the moment.

[1] 
http://code.google.com/p/google-web-toolkit/source/browse/trunk/user/src/com/google/gwt/event/dom/DragEvent.gwt.xml
[2] 
http://static.googleusercontent.com/external_content/untrusted_dlcp/www.google.com/it//events/io/2011/static/presofiles/gwt_html5_a_web_develops_dream.pdf
 

[3] http://gwt-code-reviews.appspot.com/1420811

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Re: Drag and drop (and Internet Explorer)

[Andrea Boscolo]

Reading [1] seems like IE9 supports dataTransfer object only on images, 
links, and text. Starting from IE10 it supports dd on any element (using 
the draggable attribute), and the file attribute to the dataTransfer object.

On IE9 try to use an hyperlink/image as a draggable.

[1] http://msdn.microsoft.com/en-us/library/ie/hh673539%28v=vs.85%29.aspx

On Wednesday, March 20, 2013 6:12:46 PM UTC+1, Helen wrote:

 Hello all,
  
 I've created a test project to experiment with native drag and drop 
 (2.5.1).  It works in fine Firefox and Chrome, but in Internet Explorer 
 the dropItem events don't fire.
  
 Here is the code:
  
  public void onModuleLoad() {
   
   final TextBox textBox = new TextBox();
   
   final HTML dragItem = new HTML(pDrag this/p);
   dragItem.getElement().setDraggable(Element.DRAGGABLE_TRUE);
   dragItem.addDragStartHandler(new DragStartHandler()
   {
 @Override
 public void onDragStart(DragStartEvent event)
 {
   event.setData(text, id);
   event.getDataTransfer().setDragImage(dragItem.getElement(), 10, 10);
 }
   });  
   
   
   final HTML dropItem = new HTML(pDrop onto this/p);
   dropItem.addDomHandler(new DragOverHandler() {
 public void onDragOver(DragOverEvent event) {
  textBox.setText(Dragging over dropItem);
 }
   }, DragOverEvent.getType());
   
   dropItem.addDomHandler(new DragLeaveHandler()
   {
   @Override
   public void onDragLeave(DragLeaveEvent event)
   {
textBox.setText();
   }
   }, DragLeaveEvent.getType());
   
   dropItem.addDomHandler(new DropHandler() {
 public void onDrop(DropEvent event) {
   event.preventDefault();
   Window.alert(Dropped!);
 }
   }, DropEvent.getType());
   
   FlowPanel fp = new FlowPanel();
   
   fp.add(dragItem);
   fp.add(dropItem);
   fp.add(textBox);
   
   RootLayoutPanel.get().add(fp);  
   
  }
  
 Does anyone have any ideas?
  
 Many thanks,
  
 Helen
  
  


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Re: MultiWordSuggestOracle with multiple values?

[Andrea Boscolo]

Something like... 
http://raibledesigns.com/rd/entry/creating_a_facebook_style_autocomplete ?
I guess you simply have to define you own SuggestionDisplay and when you 
select an entry, add an inline label styled as you want just before the 
suggestbox.

On Tuesday, March 5, 2013 3:22:03 PM UTC+1, membersound wrote:

 Hi,

 is the MultiWordSuggestOracle prepared to somehow being able to display 
 not only one value, but eg a comma separated list of elements chosen fomr 
 the suggest dropdown (facebook like)?
 Or would I have to extend this on my own?


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Re: New widgets: Best way to implement them?

[Andrea Boscolo]

+1
Just adding few thoughts.

Personally I think that, performance wise, cells are the best. But it is 
also true that they can be tricky to work with, when defining new widgets.
Luckily CellWidget helps *a lot* this way. Using CellWidget + Appearance 
pattern [1] + maybe UiRenderer, let you code widgets using UiBinder with a 
swappable/device-aware UI that are (supposed to be) a bit faster than the 
traditional extends Widget/Composite + UiBinder way of defining widgets. 
Sencha gxt 3 uses extensively the so called cell + appearance pattern, 
with good results over the previous implementation [2].

I see the IsRenderable strategy simply as an added value, a plus, when 
using a RenderablePanel as root widget of others composites. I guess it is 
not (actually) usable with CellWidget (by reading [3]), but in a future it 
may well be. Such strategy can also potentially open the doors to some sort 
of server-side widget rendering, using the server-side part of the already 
available ElementBuilder API (see [4]).

As a side note, interesting are the choices made in Collide: low-level 
mvp-based widgets built upon the Element object coming from the Elemental 
library, with some added custom listeners, as necessary [5].

[1] http://code.google.com/p/google-web-toolkit/wiki/CellBackedWIdgets
[2] http://www.sencha.com/products/gxt/whats-new-in-sencha-gxt-3/
[3] 
https://groups.google.com/d/topic/google-web-toolkit-contributors/g8WPRxkdqPA/discussion
[4] 
https://groups.google.com/d/topic/google-web-toolkit/neeh5YxKm-I/discussion
[5] 
http://code.google.com/p/collide/source/browse/#git%2Fjava%2Fcom%2Fgoogle%2Fcollide%2Fclient%2Fui

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Re: How to attach custom event handler to InputField of EditTextBox?

[Andrea Boscolo]

Why not using 
http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/cell/client/NumberCell.html
 
?

On Saturday, February 9, 2013 3:43:43 PM UTC+1, membersound wrote:

 Hi,

 I have a CellTable with EditTextBox. How can I attach a custom event 
 handler to the InputElement that is created if I click an entry?

 (My goal is to allow only numbers for a certain TextBox, which is easy 
 using KeyPressEvent. But how can I attach this to that box?)

 Thanks


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Re: How to detect number keys in a NativeEvent?

[Andrea Boscolo]

Check if event.getKeyCode() is between 48 and 57 (0 to 9 inclusive). And do 
the same for the keypad, if necessary.

On Saturday, February 9, 2013 5:43:19 PM UTC+1, membersound wrote:

 Hi,

 looking at NativeEvent extends JavaScriptObject: how can I detect if the 
 event was a number?
 I tried using Character.isDigit(event.getKeyCode()), but this would give 
 me an error:
 The method isDigit(char) in the type Character is not applicable for the 
 arguments (int)

 How could I else detect his?


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Re: How to attach custom event handler to InputField of EditTextBox?

[Andrea Boscolo]

Sorry, misread.
Then either use a column-based field updater that validates your input, or 
roll your own, say, EditNumberCell that accepts only number elements, just 
like NumberCell does (I guess it's easy by extending EditTextBox). In both 
cases you can use NumberFormat to validate 
http://google-web-toolkit.googlecode.com/svn/javadoc/2.5/com/google/gwt/i18n/client/NumberFormat.html
 
.

On Saturday, February 9, 2013 5:45:41 PM UTC+1, membersound wrote:

 Because NumberCell is not an editable Cell?

 Am Samstag, 9. Februar 2013 15:54:36 UTC+1 schrieb Andrea Boscolo:

 Why not using 
 http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/cell/client/NumberCell.html?

 On Saturday, February 9, 2013 3:43:43 PM UTC+1, membersound wrote:

 Hi,

 I have a CellTable with EditTextBox. How can I attach a custom event 
 handler to the InputElement that is created if I click an entry?

 (My goal is to allow only numbers for a certain TextBox, which is easy 
 using KeyPressEvent. But how can I attach this to that box?)

 Thanks



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Re: How to download a file from server without browser opening new window?

[Andrea Boscolo]

Define your anchor in uibinder and use @UiField(provided = true) in thejava 
file. Then instantiate it with that url before the binding call.

On Friday, February 1, 2013 5:18:34 PM UTC+1, membersound wrote:

 I'm using ui:binder. How should I provide href for the anchor as 
 GWT.getModuleBaseURL()?

 Am Freitag, 1. Februar 2013 17:13:06 UTC+1 schrieb Thomas Broyer:

 Can't you just link to your servlet?

 a href={0}Download/a (where {0} is replaced with your URL)

 or new Anchor(Download, GWT.getModuleBaseURL() + MyServlet)

 On Friday, February 1, 2013 4:57:06 PM UTC+1, membersound wrote:

 Hi,

 I created a servlet that provides a downloadable file (from String 
 content) by writing to the ServletOutputStream.
 On the client side, I trigger the file download by an Anchor with:

 Window.open(GWT.getModuleBaseURL() + MyServlet, _blank, );

 It works fine, BUT it seems to open a new browser window, which is 
 somehow directly closed. After this the file download dialog is show.
 How can I prevent this flickering of a new browser window? Can't I 
 achieve this somehow inline?



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Re: load indicator when loading application

[Andrea Boscolo]

This is interesting.
I'm not aware of any technique used to hook the bootstrap phase before the 
onModuleLoad() gets called. But it's also true that in the bootstrap phase 
[1] for a gwt app, the linker is the one responsible of its startup 
(iframe, cross-site, ...). So digging into [2] and [3] is probabily the 
place to look for answers. The idea is to wait for the 
DOMContentLoaded/readystate 
event and alter the dom to show what is happening. Unfortunately I guess 
that much of the bootstrapping is done before you can freely manipulate the 
dom.

After the onModuleLoad() gets called (always after such 
DOMContentLoaded/readystate 
event but not necessarily after the onload() [4]) you are free to use 
anything you want (dom or not, related):
 - using a loading gif to be removed when everything is ready;
 - faking a loading indicator by using some predefined (i.e., defined in 
the host page) images/divs to be removed in some particular steps (e.g., 
after an initial async returns) which causes a simple loading progress 
effect.

[1] 
https://developers.google.com/web-toolkit/doc/latest/DevGuideOrganizingProjects?hl=it#DevGuideBootstrap
[2] 
http://code.google.com/p/google-web-toolkit/source/browse/trunk/dev/core/src/com/google/gwt/core/linker/
[3] 
http://code.google.com/p/google-web-toolkit/source/browse/trunk/dev/core/src/com/google/gwt/core/ext/linker
[4] 
http://code.google.com/p/google-web-toolkit/source/browse/trunk/dev/core/src/com/google/gwt/core/linker/IFrameTemplate.js#88
On Friday, February 1, 2013 11:15:05 AM UTC+1, Thomas Lefort wrote:

 Is it possible (by fiddling with the bootstrap or else) to display a 
 loading indicator at start-up, I mean to show how much is left to load of 
 the application?

 Thanks,

 Thomas



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RequestFactory on Websphere

[Andrea Fiorentini]

Hello,

I'm developing an application GWT on Websphere 7 and I'm using the GWT SDK 
version 2.4 and jdk 1.6_23.
To make asynchronous calls would use requestfactory but I am having 
problems at the time the call is made. In particular, I get the following 
error:
Error 404: javax.servlet.UnavailableException: SRVE0203E: Servlet 
[requestFactoryServlet]: 
com.google.web.bindery.requestfactory.server.RequestFactoryServlet was 
found, but is missing another required class. SRVE0206E: This error 
implies, in general, that the servlet was originally compiled with classes 
that the server is able to identify. SRVE0187E: Check your classpath and 
make sure that you have all the required classes from servlet.SRVE0210I: 
The problem can be solved by recompiling the servlet using only the classes 
in the classpath runtime application SRVE0234I: Application Classpath = [C: 
\ Program files (x86) \ IBM \ SDP \ runtimes \ base_v7 \ java \ lib;

How can I know where is the problem?!

thanks
Andrea

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Re: how to create columns with common header in data grid.

[Andrea Boscolo]

Have a look at 
http://showcase3.jlabanca-testing.appspot.com/#!CwCustomDataGrid and see 
the source (maybe some classe have been renamed, but you got the point).

On Thursday, December 27, 2012 12:14:27 PM UTC+1, shray rawat wrote:


 https://lh5.googleusercontent.com/-SA2dPCsyiG8/UNwthugGWXI/A2c/l1qY23f-GYo/s1600/TABLE.JPG


 ===
 see the attached files for this question.
 I AM HAVING A,B,C AS MAIN HEADERS AND D,E,F,G AS THE SUB HEADERS UNDER C.

 how can i create these columns in data grid


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Re: Upgrading from 2.4 to 2.5: Issues with Generics?

[Andrea Boscolo]

According to 
https://groups.google.com/d/topic/gwt-steering/9K_HtTdVVpE/discussion there 
are some regressions.
I guess your problem is related. The known regression with generics has a 
review pending, so you may be able to test is against trunk in a few days, 
or wait for the 2.5.1 release.

On Wednesday, December 19, 2012 3:36:20 AM UTC+1, objectuser wrote:

 I'm working through the upgrade to 2.5 and I'm having trouble with my use 
 of generics when used with an RPC service.  My app works fine in 2.4, but 
 if I change it to use 2.5, my service calls never make it to the server.

 I've been able to reproduce the problem by using a generic method.

 If I have something like this, it's fine:

   public Result execute(Command command) { ... }

 However, if it's like this, the method is never invoked on the server:

   public T extends SomeType Result execute(CommandT command) { ... }

 Has anyone else encountered something similar?


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Re: GWT/CSS text align problem

[Andrea Boscolo]

There is a typo in the table-row div (missing display). Then use text-align 
if you want to align just the text.
See http://jsfiddle.net/a4RmK/
I'd rather try a cleaner solution though, like http://jsfiddle.net/nnpGb/

On Tuesday, December 18, 2012 9:46:15 AM UTC+1, Magnus wrote:

 Hi Thomas,

 I assume you mean something like this:
 http://jsfiddle.net/3EJ7A/19/

 In this case the cells all are aligned to the left.
 How can we position them left, right and centered?

 Magnus


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Re: GWT/CSS text align problem

[Andrea Boscolo]

I see it misaligned even on firefox.
Anyway simply add the divs to the outer panel in the left, right, center 
order (not left, center, right as you did). Recheck my last fiddle.
AFAIK should work also in IE.

On Tuesday, December 18, 2012 6:27:19 PM UTC+1, Magnus wrote:

 Hi Andrea,

 I would also prefer a cleaner solution, and I explicitely tried your 
 approach (using the code below). But it also gets misaligned in IE8:
 http://www.bavaria64.de:8080/bcst/index.html?testStatusBar

 The word RIGHT is not aligned to the right, but below the word LEFT.

 There must be a solution that also works for IE... 
 Can you fix this?

 Thank you
 Magnus

 ---

  private void init_4 ()
  {
   final String stl_outer = width:100%;;
   final String stl_lf = float:left;;
   final String stl_ct = text-align:center;;
   final String stl_rt = float:right;;
   
   pnl_lf = createHTML (stl_lf);
   pnl_ct = createHTML (stl_ct);
   pnl_rt = createHTML (stl_rt);

   FlowPanel outer = new FlowPanel ();
   setStyle (outer,stl_outer);
   outer.add(pnl_lf);
   outer.add(pnl_ct);
   outer.add(pnl_rt);
   
   add(outer);
   
   addStyleName (apl-StatusBar);

   pnl_lf.setHTML(LEFT!);
   pnl_rt.setHTML(RIGHT!);
   pnl_ct.setHTML(CENTER!);
  }



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Re: GWT/CSS text align problem

[Andrea Boscolo]

Actually a !DOCTYPE HTML declaration means standard mode, not strict. So 
you are fine with it.
See 
https://developers.google.com/web-toolkit/doc/latest/DevGuideUiPanels#Standards
To force IE8 standard mode try to add in the head element


meta http-equiv=X-UA-Compatible content=IE=8

See http://code.google.com/p/google-web-toolkit/wiki/IE8Support


On Wednesday, December 19, 2012 3:17:54 AM UTC+1, Magnus wrote:

 Hi,

 in the meantime I tried more than 5 different approaches, using divs with 
 float or display:table/row/cell and that. All approaches work with all 
 browsers except IE8! So I found that the problem may not be located within 
 the CSS! 

 The key observation for me is that the problem went away while playing 
 around with IE's display and document modes: When switching to IE8 
 standards mode, it works fine! When it didn't work, IE was in IE 7 
 standards mode (page standard). 

 So the non-working IE 7 standards mode is the page standard. One 
 approach could be to make IE asume that the working IE 8 standards mode 
 is the page standard. But how? 
 I found that my host page simply begins with !doctype html. I know 
 that this means strict mode, but can we extend this so that IE assumes 
 its IE8 standards mode? 

 My current goal is to make IE switch to IE8 standards mode 
 automatically. I believe that it could be a solution to guide IE into that 
 direction... 

 Magnus 


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Re: Protocol Buffers for GWT: Issue 2649

[Andrea Boscolo]

It is indeed a nice feature to have out of the box.

Lately I've been using a really nice library to use protobuf-like messages 
with GWT. It can generate jso implementation of server-side proto-generated 
classes, or you can even easily define your own class generator using 
StringTemplate (e.g., to generate RequestFactory Proxy interfaces). And 
much more. Take a look http://code.google.com/p/protostuff/ Of course it is 
not entirely Protobuf, see 
http://code.google.com/p/protostuff/wiki/ThingsYouNeedToKnow

There is also http://code.google.com/p/protobuf-gwt/ by Broyer although I 
do not know its current status (but I guess, watching the changes, it is 
suspended since a couple of years).

On Monday, December 17, 2012 2:31:06 AM UTC+1, V.B. wrote:

 For those of you still waiting for Issue 
 2649http://code.google.com/p/google-web-toolkit/issues/detail?id=2649 to 
 be completed, I opened a parallel feature request on the Protocol Buffers 
 issue tracker (Issue 
 431http://code.google.com/p/protobuf/issues/detail?id=431). Be 
 sure to star both issues. Hopefully, the missing feature will be completed 
 soon - it has been 4+ years since the original request.



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Re: GWT Window Scroll Bottom hit detection

[Andrea Boscolo]

They are more that enough, I guess.

maxVerticalScrollHeight = element.getScrollHeight() - 
element.getClientHeight()

then

if (element.getScrollTop() == maxVerticalScrollHeight)
  // bottom reached

That's the same idea behid ScrollPanel and the like.

On Tuesday, November 27, 2012 10:35:45 AM UTC+1, Alp Yilancioglu wrote:

 Hello;
  
 how can i make the main page ( the page only uses the HTML Scroll Bar  
 (navigators scroll bar) )
 auto load more results when the page hits the bottom. (like in ios apps ) 
  
 unfortunetly i can only get the Scroll Top and ClientHeight and 
 OffSetHeight .. these are not enough values for detecting page the bottom 
 hit ?
  
  


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Re: Get an attribute from a GWT object via jsni?

[Andrea Boscolo]

Try with

return 
conte...@com.google.gwt.canvas.dom.client.Context2d::webkitBackingStorePixelRatio;


but I don't think it will ever work.

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Re: RequestFactory Proxies and Generics - Compile problem

[Andrea Boscolo]

I guess, you can't. See 
http://code.google.com/p/google-web-toolkit/issues/detail?id=6967 and 
http://code.google.com/p/google-web-toolkit/issues/detail?id=5974

For the 2 server calls you can simply (and probabily better) call two 
different service methods with two different receivers in the same request 
context, before firing it (that will end up in a single http request, if I 
remember right).

On Wednesday, November 14, 2012 9:52:07 PM UTC+1, otth2oskier wrote:

 I am writing a bunch of screens using CellTable and the AsyncDataProvider 
 along with RequestFactory calls. I would like to get away from the pattern 
 of making a server call for data and a second call for row count to update 
 the AsyncDataProvider's data and row count. I would like create a generic 
 return object that contains both data and count and make only one cal to 
 the server.

 My code looks like:

 public class ResultT extends EntityBase {
 private final ListT data;
 private final long count;

 public Result(ListT data, long count) {
 this.data = data;
 this.count = count;
 }

 public ListT getData() {
 return data;
 }

 public long getCount() {
 return count;
 }
 }


 @ProxyFor(value = Result.class, locator = EntityLocator.class)
 public interface ResultProxyT extends EntityProxy extends ValueProxy {
 ListT getData();

 public long getCount();
 }


 @Service(value=UserDao.class,locator=BaseServiceLocator.class)
 @ExtraTypes({ResultProxy.class})
 public interface UserRequest extends RequestContext {
 RequestLong count();

 RequestUserProxy find(Long id);

 RequestResultProxyUserProxy findAll(int firstResult, int maxResults);

 RequestVoid persist(UserProxy instance);

 RequestVoid remove(UserProxy instance);
 }


 @Stateless
 public class UserDao {

 @PersistenceContext(unitName = acdb)
 private EntityManager entityManager;

 private static Logger LOGGER = Logger.getLogger(UserDao.class.getName());

 public long count() {
 ...
 }

 public User find(Long id) {
 return entityManager.find(User.class, id);
 }

 public ResultUser findAll(int firstResult, int maxResults) {
 ...
 }

 public void persist(User instance) {
 LOGGER.info(Persisting instance: + instance);
 entityManager.merge(instance);
 LOGGER.info(Persisted instance: + instance);
 }

 public void remove(User instance) {
 ...
 }

 }


 @ProxyFor(value = User.class, locator = EntityLocator.class)
 public interface UserProxy extends EntityProxy {
 Long getId();

 String getFirstName();

 void setFirstName(String firstName);

 String getLastName();

 void setLastName(String lastName);
 }



 When I compile, I am getting:

 ResultProxy.java:13: warning: Cannot validate this method because the 
 domain mapping for  the return type (java.util.List) could not be resolved 
 to a domain type
 UserRequest.java:19: Could not find domain method similar to 
 com.avaya.gwtproto.shared.model.ResultT findAll(intint)

 Lines are highlighted in red above. 

 I cannot figure out what I am doing wrong. I am guessing that the compiler 
 is not handling the generics as I would expect it to. I don't want to write 
 a separate return value for each EntityProxy and I don't want to make 2 
 server calls to get data and count to refresh my CellTable.



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Re: Toggle Visibility of a Sidebar Element

[Andrea Boscolo]

Actually DockLayoutPanel implements AnimatedLayout thus it has direct 
animation support.
You simply need to use setWidgetSize(widget, size) and call animate() (if 
necessary).
Or even simpler use setWidgetHidden(widget) with gwt = 2.5.

On Tuesday, November 6, 2012 10:01:55 PM UTC+1, Manuel wrote:

 Hey,

 I try to toggle the visibility of a Element. But I dont get a resizing 
 done :(

 I use a DockLayoutPanel:
 In the WEST I got a Sidebar. In the CENTER I got a Frame...

 I made the Sidebar invisible via: 
 DOM.setStyleAttribute(SideBar.getElement(), display, none);

 But the CENTER dont take the free space. 
 (DOM.setStyleAttribute(CenterFrame.getElement(), position, relativ); 
 didnt worked)



 Via Firebug i found out, that the center is wrapped in a div-tag that I 
 cannot manipulate.

 So anyone know whats the propper way, to make the Sidebar 
 visible/invisible ?

 Help is much appreciated.

 Thanks in advanced.

 Regards




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Re: compile to display java code line number

[Andrea Boscolo]

And don't forget set-property name=compiler.stackMode value=emulated/ 
in that case.

Have also a look at the experimental SuperDevMode :)

On Thursday, November 1, 2012 3:08:37 AM UTC+1, Thad wrote:

 If you run in devmode, you will see the Java line number.

 To see something more easily understood in production mode, add -style 
 PRETTY to your program arguments. See 
 https://developers.google.com/web-toolkit/doc/latest/RefCommandLineTools, 
 specifically targets gwtc and devmode generated by webAppCreator.

 On Wednesday, October 31, 2012 3:22:44 PM UTC-4, Luke wrote:

 What parameters should I use to compile in order to display java code 
 line number when exception ?  Below is error showing on my firefox when 
 exception

 uncaught exception: Class$S244: Exception caught: 2 exceptions caught: 
 (TypeError) 
  fileName: 
 https://remoteMachine.com/project/71BA89F46C25448983CE4617F27FC4C8.cache.html
  lineNumber: 221: b.c is null; (TypeError) 
  fileName: 
 https://remoteMachine.com/project/71BA89F46C25448983CE4617F27FC4C8.cache.html
  lineNumber: 227: b.c is null



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Re: I Help help implementing ClickableSafeHtmlCell

[Andrea Boscolo]

If you want your cell to handle events you need to set those events as 
consumed by defining a constructor like

public ClickableSafeHtmlCell(SafeHtmlRendererString renderer) {
  super(renderer, click);
}

But do not reinvent the wheel, 
http://google-web-toolkit.googlecode.com/svn/javadoc/2.5/com/google/gwt/cell/client/ClickableTextCell.html
 is 
already there (that also is a safehtmlcell).
On Wednesday, October 31, 2012 2:31:58 AM UTC+1, Milan Cvejic wrote:

 Hi,
 I am trying to implement ClickableSafeHtmlCell but I can not make it to 
 handle events. I am using Field

 class ClickableSafeHtmlCell extends SafeHtmlCell {

 public void onBrowserEvent(Cell.Context context, Element parent, 
 SafeHtml value, NativeEvent event, ValueUpdaterSafeHtml valueUpdater) {
 super.onBrowserEvent(context, parent, value, event, 
 valueUpdater);
 if (click.equals(event.getType())) {
 Window.alert(bla);
 }
 }
 }


 and then creating CellTable column with following code:

 ColumnData, SafeHtml objectNameColumn = new ColumnData, 
 SafeHtml(new ClickableSafeHtmlCell()) {
 @Override
 public SafeHtml getValue(ModuleEntry object) {
 String name = (object.getName() == null ?  : 
 object.getName());
 String description = (object.getDescription() == null ?  
 : object.getDescription());

 String regex = (([^]+));
 return new SafeHtmlBuilder().appendHtmlConstant(
 span + name + /span/br / + span 
 title=' + new 
 SafeHtmlBuilder().appendEscaped(description.replaceAll(regex, 
 )).toSafeHtml().asString() + '
 + description.replaceAll(regex, ) + 
 /span).toSafeHtml();
 }
 }; 

 and set FieldUpdater for that column:

 objectNameColumn.setFieldUpdater(new FieldUpdaterData, 
 SafeHtml() {
 public void update(int index, Data object, SafeHtml value) {
 Window.alert(value.asString());
 }
 }); 


 Is there anything that I am missing? Any suggestion is welcome. 

 Thanks,
 Milan 


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Re: performance problem on andorid using phonegap

[andrea casati]

ok, sorry :(
this is the controller:
//=

public class ControllerP {


 private ModelP model;

private ViewP view;

 ControllerP(ModelP model, ViewP view) {

this.model = model;

this.view = view;

 view.addButtonListener(new ButtonListener());

}

class ButtonListener implements ClickHandler {


 @Override

public void onClick(ClickEvent event) {

model.incrementI();

view.aggiornaI();

view.button.setFocus(true);

} 

}
//=
this is the model:

public class ModelP {

 public int i;

 public ModelP() {

i = 0;

}

 public void incrementI() {

i++;

}

}

//=

this is the view:

public class ViewP {

 public TextBox textBox;

public ModelP model;

public Button button;

 public ViewP(ModelP model) {

this.model = model; 

 textBox = new TextBox();

textBox.setText(hello world!);

textBox.setReadOnly(true);

 button = new Button(click);

 RootPanel.get(button_container).add(button);

RootPanel.get(text_container).add(textBox);

button.setFocus(true);

}

 public void addButtonListener(ClickHandler handler) {

button.addClickHandler(handler);

}

 public void aggiornaI() {

textBox.setText(model.getI()+);

header.setText(model.getInUso());

}

}


the css for the textBox and the button position:

#button_container {

position: absolute;

top: 6em;

left: 1em;

}

#text_container {

position: absolute;

top: 6em;

left: 10em;

}


and finally in the html file i add only this:

div id=header_container/div

div id=button_container/div

div id=tab_container/div

div id=text_container/div

div id=image_container/div


very very simple, and very fast on the pc..but on the phone is incredibly 
slow


thanks a lot for the help!


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performance problem on andorid using phonegap

[andrea casati]

hi all guys!

i develop a very small application to test gwt the first time..so using MVC 
i create a button and a teextarea, pressing the button the number in the 
textfiel growing up

this is the entry point:

public void onModuleLoad() {

 //MODEL

ModelP model = new ModelP();

 //VIEW

ViewP view = new ViewP(model);

 //CONTROLLER

ControllerP controller = new ControllerP(model, view);

}


in the model there is a varaible and a function to increment the variable;

in the view there is simply a button and a textarea

in the controller there is a clickListener that listens the button and 
increment the variable.. very simple a stupid program, non css , non html 
changes.. nothing..

i only add this line   inherits name='com.google.gwt.user.User'/ in the 
xml to maintain the compatibility with android ICS..


when i run this program in my android ics phone (512ram, 1ghz cpu) using 
phonegap the program is terribly slow (on the pc is perfectly fast), i 
mean…if i press the button, the textfield 

growing up after 1 second!  :(


can you help me? :)

thanks a lot!

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Re: How to define AutoBeanFactory?

[Andrea Boscolo]

Have you read http://code.google.com/p/google-web-toolkit/wiki/AutoBean ?
I think this can help to get you started.

On Thursday, October 18, 2012 10:46:32 PM UTC+2, dhoffer wrote:

 I'm trying to figure out how to use AutoBeanFactory to decode 
 a JSONString, e.g.

 AutoBeanIPayload autoBean = AutoBeanCodex.decode(myAutoBeanFactory, 
 IPayload.class, jsonValue.stringValue());
 IPayload payload = autoBean.as();

 What I'm not clear on is how to define myAutoBeanFactory?

 I understand that's an interface passed 
 to GWT.create(MyAutoBeanFactory.class), but what methods 
 does MyAutoBeanFactory need?

 My IPayload and its content is defined as:

 public interface IPayload extends Serializable {
 IGWTMessage[] getMessages();
 void setMessages(IGWTMessage[] messages);
 }

 public interface IGWTMessage extends IGWTMessage {
 IUUIDReference getMessageId();
 void setMessageId(IUUIDReference id);
 }

 Then there are about a dozen derived interfaces that 
 extend IGWTMessage and then each of those has its concrete implementation 
 class.

 How can I handle this with AutoBeanFactory/JSON?

 Btw, this used to be just Serialized and marshaled that way but now I'm 
 trying to use a different approach that requires JSON.  Also, if there was 
 a way to just do a regular Java binary serialization that would be fine too 
 as I could then turn that into a Base64 encoded string and send just that 
 via JSON...then do the reverse on the server.  (But I haven't yet seen a 
 way to do Java binary serialization in the GWT client.) 

 Thanks,
 -Dave









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Re: Polymorphic requestfactory example wanted

[Andrea Boscolo]

Maps are currently not supported as of 
http://code.google.com/p/google-web-toolkit/issues/detail?id=5524 a patch 
has been submitted but apparently it is blocked by 
http://code.google.com/p/google-web-toolkit/issues/detail?id=5974 so I 
guess you have to review your transportable type (maybe using a bean 
wrapper with 'string key' + 'BaseObject value' as suggested in the first 
issue).

When in doubt check the issue list and poke around tests in the gwt suite. 
For instance: 
http://code.google.com/p/google-web-toolkit/source/browse/trunk/user/test/com/google/web/bindery/requestfactory/gwt/client/RequestFactoryPolymorphicTest.java

On Thursday, October 18, 2012 11:43:00 PM UTC+2, zam...@gmail.com wrote:

 Hi All,

 I need a requestfactory, which can transports a MapString, ? extends 
 BaseObject objects. Is there any example to help me to understanding, how 
 can I do it?

 thx
 Zamek

  


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Re: RPC call from server to client

[Andrea Boscolo]

The problem is that websocket (as any other HTML5 spec) has chages a bit in 
the last two years making some useful libraries outdated and not definitely 
working.

On Thursday, October 18, 2012 6:56:19 PM UTC+2, Magnus wrote:

 Hi,

 I took a look at most of the libraries, but there is no one that can make 
 my happy, because none of them seems to be lightweight.

 Atmosphere requires Maven. If I go to Maven someday, I would like to do 
 this on the basis of a free decision, but not as a dependency for the 
 library I am looking for.

You can always download the jars somewhere and/or use a dependency manager 
like Apache Ivy (that can be easily integrated with ant) that fetches Maven 
dependencies and/or build the jar from scratch. Maven is not an obstacle.

 All the systems mentioned in the context of Comet (
 http://cometdaily.com/maturity.html) seem to be big frameworks, with much 
 more functionality than that I am looking for. This also holds for Errai.

That article is quite outdated (2009), I suspect there *a lot* more 
frameworks out there that can make the difference. But if you want to go 
with websockets as lightweight as possible, both your server and your 
client (browser) need to support it in the most up-to-date way.


 I am always careful with such decisions. If I always add a complete 
 framework whenever I need a little bit of functionality, my project will 
 explode very soon.

 What seems to be nice and small and light is the HTML5 support for 
 WebSockets, at least as described here (*):
 http://code.google.com/p/gwt-ws/


 One Servlet declaration, one Handler at the server and one handler at the 
 client. This seems very attractive to me!

Last update is  Nov 2010, I guess the websocket specs have changed since 
then, so I don't think this will ever work. But you can try! 


 However, it seems that GWT supports HTML5 but without WebSockets:
 https://developers.google.com/web-toolkit/doc/latest/DevGuideHtml5?hl=de

 Is this correct? Why does GWT support HTML5 but not for such an important 
 thing like WebSockets?

Not in GWT, but you can try the GWT Elemental library (for the client) that 
support all HTML5 specs, just pay attention to the supported browsers.


 So if I wanted to use the library above (*):
 How are these projects below code.google.com organized? Is it always a 
 jar file that one has to put into WEB-INF/lib to use the library?

You can clone a repository and build from sources or download the jar and 
place it in the lib folder.


 I really hope that I can use this lightweight library (*) very soon and I 
 appreciate any help that gets me started.

 Magnus

 There is also another library (streaming/long polling tough) I've used 
some time ago http://code.google.com/p/gwteventservice/ . It adheres 
somehow to the server-event specifications (that is another way to say 
server-client communication).

Anyway I'd give atmosphere a try.

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Re: AutoBean polymorphism support

[Andrea Boscolo]

Thanks, you confirmed my suspicions.
Are you saying I can use Splittable to achieve polymorphism? How? Have you 
ever tried?
Of course I can somehow get rid of polymorphism in my classes, but I'd 
rather do not.

On Saturday, October 13, 2012 1:41:46 PM UTC+2, Thomas Broyer wrote:

 No, AutoBean has no mean to support polymorphism, and it specifically 
 cannot be used for your use-case.
 You can possibly use Splittable, at a lower-level, or Elemental's JSON, JS 
 overlays, or JSONObject.

 On Saturday, October 13, 2012 12:40:16 PM UTC+2, Andrea Boscolo wrote:

 Hi all,
 I am developing an app in which I use (or at least I would like to use) 
 AutoBeans for serializing data. Unfortunately it seems to me that 
 polymorphism is not supported i.e., I lost the concrete type once I 
 deserialize the json in client-side, only the Base supertype is available.
 I looked everywhere but I haven't found some concrete answer, so I hope 
 someone has already faced (and why not, solved) this problem.
 I created a really simple testcase that can be found on 
 https://gist.github.com/3884099

 I know AutoBean is behind RequestFactory so I though it supports 
 polymorphism as well. I don't want to rely on RF as I do not need such 
 complexity, I just simply need a way to serialize beans using AutoBean, but 
 polymorphism is a must.

 Is is even achievable? Hope someone can help.

 Thanks in advance,
 Andrew.



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AutoBean polymorphism support

[Andrea Boscolo]

Hi all,
I am developing an app in which I use (or at least I would like to use) 
AutoBeans for serializing data. Unfortunately it seems to me that 
polymorphism is not supported i.e., I lost the concrete type once I 
deserialize the json in client-side, only the Base supertype is available.
I looked everywhere but I haven't found some concrete answer, so I hope 
someone has already faced (and why not, solved) this problem.
I created a really simple testcase that can be found on 
https://gist.github.com/3884099

I know AutoBean is behind RequestFactory so I though it supports 
polymorphism as well. I don't want to rely on RF as I do not need such 
complexity, I just simply need a way to serialize beans using AutoBean, but 
polymorphism is a must.

Is is even achievable? Hope someone can help.

Thanks in advance,
Andrew.

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Re: Use Elemental to optionally generate HTML on the server?

[Andrea Boscolo]

 I'm using Cell widgets elsewhere but don't think they'll buy me enough 
 here because I can't use paging in this UI - I need to display the whole 
 table.  I'm already loading using an async request.

Even if you don't use paging, it can increase the rendering speed of a 
basic, say, flext table.


 Thanks for the pointer to ElementBuilder.  That seems promising but has 
 some drawbacks - it won't help me manipulate the DOM after it's been 
 created.  Also it seems incomplete - it currently only has builders for 
 div, select, option and styles.  Maybe it's a dead end and is going 
 to be replaced with Elemental?

Well given a builder you can call its finish() method to return the actual 
built DOM element that can be later reused if stored somewhere, I guess. 
Also AFAICT the builders are all there 
http://gwt-code-reviews.appspot.com/1463812 and I don't think it's a dead 
end, for instance they are used internally in CellTable, they are just 
another (fast) way to build elements. And they have nothing to do with 
Elemental.


 I haven't tried any of this yet but I assumed that Elemental would work on 
 non-webkit browsers so long as you kept to the DOM they support (i.e. keep 
 to the simple stuff).  Is that not correct?

Elemental is library generated automatically from the WebIDL specs, in 
particular the WebKit ones taken from the Dart project 
http://code.google.com/p/google-web-toolkit/source/browse/trunk/elemental/README
 
thus I think they'll have problems with old IE versions (but maybe not with 
the very very basic stuff like elemental.dom.*, you need to try). Anyway I 
don't think it will buy you much in the short term.

The IsRenderable/PotentialElement strategy seems another way to 
singnificantly cut down rendering time, although its very experimental 
state and I've not yet figured out its usage. See 
https://groups.google.com/d/topic/google-web-toolkit/neeh5YxKm-I/discussion 
and 
https://groups.google.com/d/topic/google-web-toolkit-contributors/g8WPRxkdqPA/discussion

Thanks,
Roy

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Re: Use Elemental to optionally generate HTML on the server?

[Andrea Boscolo]

I'd give CellTable/DataGrid a try, if your model is suitable for it and 
your cells aren't so 'fancy'. You can use async requests, paging and 
lightweight widgets (cell widgets); should be more than enough to speed up 
fetching/rendering time.

There is also the ElementBuilder API that makes easy to create DOM elements 
from chaining calls in a builder fashion. Checkout some 
examples in 
http://code.google.com/p/google-web-toolkit/source/browse/trunk/user/javadoc/com/google/gwt/examples/dom/builder/
 
.
One interesting point is that you can use such builders also on server-side 
(the server-side actual implementation uses string manipulation instead of 
DOM operations) and send back the generated string to the client (never 
tried though) http://gwt-code-reviews.appspot.com/1455802/

Also AFAICT Elemental does not work well (or at all) with IE prior to 9.

On Tuesday, October 9, 2012 4:08:56 PM UTC+2, Roy wrote:

 I have a large GWT app which unfortunately is slow in some old browsers I 
 need to support (IE7).  A major part of the slowness is my architecture - I 
 am using GWT-RPC to download model objects from the server and then 
 building a large HTML table in the browser using GWT Widgets.  The table is 
 not fancy - just text, links, and images - but it can get pretty big.

 I'm considering fixing this by building some of my HTML on the server and 
 then downloading it over GWT-RPC as a string, and injecting it in to the 
 DOM using setInnerHtml().  I will still have to do some manipulation later 
 in the browser though (my UI refreshes periodically in the background). 
  What I would really like would be to write my code in such a way that I 
 could decide at runtime if it was best to build the table on the server or 
 in the browser.

 Elemental looks like a promising way to do this - it would not be hard to 
 generate a server-side implementation of the Elemental HTML interfaces that 
 built up an HTML string, and then send that string over the wire to be 
 injected in the browser.  My application logic would only interact with the 
 Elemental interfaces, so I could decide at runtime which implementation to 
 use.

 Does this sound reasonable or am I barking up the wrong tree here? 


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Re: Help finding widget that someone posted in this group

[Andrea Boscolo]

Too much generic.
One of the best I've seen so far is
https://groups.google.com/forum/?fromgroups=#!starred/google-web-toolkit/IbZf2DeINk8

On Thursday, September 20, 2012 4:57:15 AM UTC+2, Milan Cvejic wrote:

 Hello,
 I am looking for ListBox implementation that someone posted in this group 
 few months ago. I bookmarked it, but lost my bookmarks :(

 Thanks for help!

 Best,
 Milan


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Re: Two footers in a CellTable?

[Andrea Boscolo]

Yes, check for Header/FooterBuilder API.
http://showcase3.jlabanca-testing.appspot.com/#%21CwCustomDataGrid

On Monday, September 17, 2012 10:42:59 PM UTC+2, Kevin Buikema wrote:

 Is there a way within the standard CellTable to add two footers to the 
 table? I need to have two separate non-editable total rows, and I was 
 hoping to be able to do it without having to customize objects or create a 
 separate table for the totals.

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Re: Asynchronous work - what are our options?

[Andrea Boscolo]

Elemental should support it.
And there are also other wrappers here and there that work too.

On Tuesday, September 11, 2012 5:31:33 AM UTC+2, markww wrote:

 Hi,

 I was hoping to do some asynchronous work, though I do not believe this is 
 possible (due to the limitations of javascript). The work I need to do is 
 not an http request, it's computing some AI stuff for a game. If I 
 understand correctly:

1. RPC is reserved only for http communication. There's no way to just 
launch an asynchronous task where my own clientside code is run in the 
async handler.
2. There are now things called web workers as part of html5, but GWT 
doesn't have wrappers for them yet?

 Thanks


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Re: Meteor DDP - or similar - with GWT?

[Andrea Boscolo]

I used it in a past project and it was simple and easy enough. Seems also 
to be relatively up to date.
There is also atmosphere that carries a gwt client side module with also 
out of the box experimental support for websockets and much more: 
https://github.com/Atmosphere/atmosphere/tree/master/modules

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Re: Elemental documentation

[Andrea Boscolo]

A start is on https://developers.google.com/web-toolkit/articles/elemental
Anyway given its generated nature, I don't think it will ever be documented 
with something else other that javadoc/samples.
If you are interested in something in specific, you have to dig into 
elemental.* packages.

On Tuesday, August 21, 2012 10:50:54 AM UTC+2, Sergey wrote:

 Hi.
 Where I can find Elemental documentation?

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Re: Multiple cells per row in CellTable (like a Cell Grid)

[Andrea Boscolo]

It's up to you to create a grid of cells. Try to use a CompositeCell 
http://google-web-toolkit.googlecode.com/svn/javadoc/2.5/com/google/gwt/cell/client/CompositeCell.html

On Tuesday, August 21, 2012 3:29:20 PM UTC+2, Shaun Tarves wrote:

 Is there any way to have multiple cells per column in a CellTable? What I 
 would really like is a grid of cells, but it only seems to be one per row.

 The closest I can come is a CellList whose cells are display: inline-block.

 Any ideas?


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Re: AsyncDataProvider and CellTree

[Andrea Boscolo]

How do you bind a cell tree using uibinder?
I think you can't call directly the getNodeInfo and expect you tree to be 
populated. The async data provider fills the tree by calling the 
onRangeChanged(), there is where you need to put you RPC call.
The 
http://google-web-toolkit.googlecode.com/svn/javadoc/2.5/com/google/gwt/view/client/AsyncDataProvider.html
 
can be used in both celltree and celltable and holds a HasDataT display.
In the getNodeInfo the null check should be used to fill in the root 
element(s).

Try to simplify things i.e., removing authenticaton and the load button.

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Re: AsyncDataProvider and CellTree

[Andrea Boscolo]

On Monday, July 30, 2012 10:02:03 PM UTC+2, Thad wrote:

 I have a CellTree in which I want to represent something similar to a 
 directory listing (actually represented in database records):

 public class DirectoryObject implements Serializable {
 public String name;
 public String type; // 'file' or 'folder'
 public int group;
 ...
 }

 This listing comes from a server application which the user must log into. 
 Naturally I can't call the RPC to populate the tree until the login takes 
 place.

 My wish is to draw the UI and upon login (or upon pressing a 'List' or 
 'Refresh' button to return an ArrayListDirectoryObject. From this I 
 populate the previously empty tree. Objects of type 'folder' will be the 
 branch nodes and will require a new RPC call with the name as a parameter 
 to find the children (null gets me the highest level).

 My question is how, once the empty tree is present, to trigger that call 
 and start my listing. So far I've got what you see below, but I'm not sure 
 if it's right and I'm stumped on the UiHandler for my list button (at the 
 very bottom). I'm trying to follow the CellTree examples, but they use 
 static data or don't start empty.

 public class DirectoryPanel extends Composite {

   private static DirectoryPanelUiBinder uiBinder = GWT
   .create(DirectoryPanelUiBinder.class);

   interface DirectoryPanelUiBinder extends
 UiBinderWidget, DirectoryPanel {
   }
   
   private static class MyDataProvider extends 
 AsyncDataProviderDirectoryObject {
 
 private String folderName;
 
 public MyDataProvider(DirectoryObject directory) {
   if (directory != null)
 folderName = directory.name;
 }

 @Override
 protected void onRangeChanged(HasDataDirectoryObject display) {
   final Range range = display.getVisibleRange();

   AsyncCallbackArrayListDirectoryObject callback = 
   new AsyncCallbackArrayListDirectoryObject() {
 @Override
 public void onFailure(Throwable caught) {
   Window.alert((new GwtOptixException(caught)).getMessage());
 }

 @Override
 public void onSuccess(ArrayListDirectoryObject result) {
   int start = range.getStart();
   GWT.log(onRangeChanged, start: +start);
   updateRowData(start, result);
 }
   };
   Cold.getRpcService().getDirectoryListing(folderName, callback);
 }
   }
   
   private static class DirectoryTreeModel implements TreeViewModel {
 
 private SingleSelectionModelDirectoryObject selectionModel = 
 new SingleSelectionModelDirectoryObject();

 public DirectoryTreeModel() {
   selectionModel.addSelectionChangeHandler(new 
 SelectionChangeEvent.Handler(){
 public void onSelectionChange(SelectionChangeEvent event){
   /* Huh? 
 from 
 https://groups.google.com/forum/?starthl=en#!searchin/google-web-toolkit/CellTree$20asyncdataprovider/google-web-toolkit/jdQLj_oZTek/fuKmFMrbghsJ
 but there's no getSelectedObject() in SelectionChangeEvent
 */
   //DirectoryObject rec = 
 (DirectoryObject)event.getSelectedObject();


It's actually selectionModel.getSelectedObject() that returns your real 
DirectoryObject.
 

 }
   });
 }
 
 @Override
 public T NodeInfo? getNodeInfo(T arg0) {
   if (arg0 instanceof DirectoryObject) {
 CellDirectoryObject cell = new AbstractCellDirectoryObject() {
   @Override
   public void render(Context context, DirectoryObject value,
   SafeHtmlBuilder sb) {
 if (value != null) {
   sb.appendEscaped(value.name);
 }
   }
 };
 MyDataProvider provider = new 
 MyDataProvider((DirectoryObject)arg0);
 return new DefaultNodeInfoDirectoryObject(provider, cell, 
 selectionModel, null);
 // or return new DefaultNodeInfoDirectoryObject(provider, cell); 
 ??


The first line: generally you should provide a selection model for all your 
nodes if you want to do something when they are selected (the actual 
expansion, if not a leaf, is a provider's job).

  }
   return null;
 }

 @Override
 public boolean isLeaf(Object arg0) {
   return arg0 != null  ((DirectoryObject)arg0).name != null 
   ((DirectoryObject)arg0).type.equals('file');
 }
   }
   
   @UiField(provided = true)
   CellTree tree;
   @UiField
   Button list;
   
   DirectoryTreeModel treeModel;

   public DirectoryPanel() {
 treeModel = new DirectoryTreeModel();
 tree = new CellTree(treeModel, null);
 
 initWidget(uiBinder.createAndBindUi(this));
   }
   
   @UiHandler(list)
   void onList(ClickEvent event) {
 // What here??
   }

 }


I'd: 
 - create the cell tree only if the user has logged in (and show something 
like an empty message);
- create a root null node (as you did) but refuse the expansion/selection 
until the user has 

Re: GWTEventService listener triggers additional call each time the web application is displayed in the browser

[Andrea Boscolo]

Has been a while since I used the framework, but I suspect you do not 
'unlisten' events when you leave your application (see 
http://code.google.com/p/gwteventservice/wiki/ConnectionHandling), your 
session stays open and every time you reload the app a new listener is 
registered.
Anyway I'd suggest to update to GWTEventService 1.2 (much more recent) and 
ask directly in the project's group 
https://groups.google.com/forum/?fromgroups#!forum/gwteventservice

On Tuesday, July 24, 2012 10:58:13 PM UTC+2, gshepherd wrote:

 I have a web service bundled with my GWT app and I'm using GWTEventService 
 1.1.1.  I need for the client to be notified when a record is added to the 
 database via a web service call.  In the OnMonduleLoad I've added the event 
 listener and everything works as expected.  For example, an external call 
 comes into my web service to add a new user.  My listener gets triggered on 
 this event and updates the GUI accordingly.
  
 The problem occurs when I leave the URL of my application and then return 
 sometime later, every time I get a new web service request to add a user my 
 listener fires twice.  If I leave the URL again and return now it fires 
 three times and so on.  I've verified that I'm only adding the one listener 
 on startup, but I don't understand why my listener keeps triggering 
 additional times each time I leave my URL and return later.
  
 Any ideas would be greatly appreciated.  Thanks.


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Re: Cell-Backed Widgets

[Andrea Boscolo]

AFAICT the only widget implemeted this way is TextButton (backed by 
TextButtonCell) and it shouldn't be abandoned.
In the new release of Sencha GXT 3 such pattern is hevily used throughout 
the whole widget set, so it is at least well proven.

On Friday, June 29, 2012 5:13:10 AM UTC+2, July wrote:

 HI all:

 I found one doc from GWT offcial wiki page, it's about cell-backed widgets:
 http://code.google.com/p/google-web-toolkit/wiki/CellBackedWIdgets 

 The idea in this doc is really nice, however seem GWT does not continue 
 with this idea? in this package:
 com.google.gwt.widget.client
 there are merely only one of the modern widget since 2011.

 I think It would be very regretful if GWT team quit this wonderful design 
 pattern.


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Re: gwt 2.5

[Andrea Boscolo]

See https://developers.google.com/web-toolkit/makinggwtbetter#compiling to 
compile from trunk.

On Monday, June 25, 2012 10:22:51 PM UTC+2, Yuri C wrote:

 I too would like to know if there is a compiled package.

 On Friday, June 22, 2012 2:21:39 PM UTC-4, Dennis Haupt wrote:

 is there a precompiled package? 



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Re: GWT (lazy) Widget rendering: Comparison of approaches

[Andrea Boscolo]

What about the relation between IsRenderable and the ElementBuilder API?

I know that IsRenderable is used to first render the widget content as 
safehtml/html, and then attach (claim) the 'real' widget to it. Can the 
rendering part be deferred to the server (given the lazy nature of 
RenderablePanel)? Any samples out there of this technique?

The other element I see somehow involved in a possible server-side 
rendering, is ElementBuilder (http://gwt-code-reviews.appspot.com/1455802). 
Reading the RFC, it is possible to define even server-side builders (like 
HtmlDivBuilder) and build an html/safehtml context by chaining calls. But 
what if I would like to add/remove handlers to a such server-side-generated 
dom element? Wrap? Maybe is this the IsRenderable purpose?

Server-side widget rendering it's a really interesting topic (mobile 
development, server-driven UIs, ...), but I can't find any more 
informations/design docs/samples other than reading all relevant 
commits/experiment myself.

On Wednesday, May 23, 2012 12:57:22 PM UTC+2, Thomas Broyer wrote:


 On Wednesday, May 16, 2012 4:03:40 PM UTC+2, Chris Lercher wrote:

 There are several competing (or complemental) new/experimental (or 
 deprecated) classes around, which deal with rendering Widgets in 
 alternative (often lazy) ways in GWT:

 - GXT2's lazy 
 Componenthttp://grepcode.com/file/repo1.maven.org/maven2/com.extjs/gxt/2.2.0/com/extjs/gxt/ui/client/widget/Component.java
  (which 
 has been deprecated in GXT3)
 - 
 LazyPanelhttp://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/user/client/ui/LazyPanel.html
 - 
 PotentialElementhttp://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/user/client/ui/PotentialElement.html
  [experimental]
 - 
 IsRenderablehttp://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/user/client/ui/IsRenderable.html
  [very 
 experimental] and 
 RenderablePanelhttp://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/user/client/ui/RenderablePanel.html
  [experimental]

 Seeing how GXT2 had problems with their lazy rendering, what can we 
 expect from these concepts? Looking into trunk, IsRenderable seems to 
 evolve (using a new RenderableStamper class), so there's probably something 
 in the pipeline...

 I know, that this is not a concrete question - I'm just curious if 
 someone has interesting information about this subject?


 AFAICT, PotentialElement and IsRenderable are to speed-up rendering of 
 widgets, particularly when used within an HTMLPanel or RenderablePanel in a 
 UiBinder template: the widget is rendered to SafeHtml (and stamped), 
 concatenated to the HTML of the containing HTMLPanel and rendered as a 
 single big HTML string, then the stamped element is retrieved out of the 
 HTMLPanel and the widget is attached to it (claimElement) and finally 
 logically attached to the HTMLPanel (as its parent widget).
 I suppose they could also be used to attach widgets to some HTML generated 
 (pre-rendered) on the server-side (similar to Closure's decorate(), and the 
 various static wrap() methods used in basic GWT widgets; there's no 
 notion of canDecorate() as in Closure though, so it'd be your 
 responsibility to build this into your widgets; not really for reusable 
 widgets, more for applications you control from end-to-end).


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Re: XmlAdapter compile error

[Andrea Boscolo]

If your classes are simply annotated with JAXB annotations, you should 
follow http://code.google.com/p/google-web-toolkit/issues/detail?id=4020 
(comment 10) for the workaround, and keep them in the 'shared' package, so 
they can communicate and used with both sides (and you don't violate DRY).
But If you have adapters (i.e., classes that extend XmlAdapterV, B) that 
are in the client/shared side, you should move them in the server, 'cause 
they cannot be compiled and are useful only when taking 
marshalling/unmarshalling in account.
I don't think your solution work. You are only excluding files from 
compilation, but what if they are useful? Move adapters to the server. Keep 
annotated classes in the 'shared' and follow the above link.

On Thursday, June 21, 2012 1:38:40 PM UTC+2, shawnjohnson wrote:

 Sorry, I didn't mean to post that reply quite that way (hit some new 
 keyboard combo)... 

 My.gwt.xml 
 (before) 
 module 
   source path=common/ 
 /module 

 (after) 
 module 
   source path=common 
 exclude name=MyXmlAdapter1.java / 
 exclude name=MyXmlAdapter2.java / 
 exclude name=MyXmlAdapter2.java / 
   /source 
 /module 


 On Jun 21, 7:35 am, shawnjohnson shawnjohnson...@gmail.com wrote: 
  Thank for the reply.  I'm only marshalling/unmarshalling on the 
 server-side 
  - so does that mean I should move those classes into a server package? 
   That's even if the annotation is in the shared bean?  Yes, still using 
  GWT-RPC. Is the workaround as simple as this? 
  
  My.gwt.xml (before) 
  module 
  source path=common//module module source path=common 
  exclude name=MyXmlAdapter1.java / 
  exclude name=MyXmlAdapter1.java / 
  /source 
  
  
  
  
  
  
  
  On Wednesday, June 20, 2012 6:16:03 PM UTC-4, Andrea Boscolo wrote: 
  
   Such annotations are not GWT compatible (i.e., they are not known to 
 the 
   GWT emulated JRE and definitely cannot be compiled in js, even 
 providing 
   the relative sources - that I think they can be found in 
 jaxb-api-src.jar 
   inside the jaxb distribution). 
   To allow jaxb annotations (and annotations only) to be used in 
   client/shared side, you have to tell the gwt compiler to compile those 
   classes ignoring such annotations while still allow the server side to 
 use 
   them. 
   Seehttp://
 code.google.com/p/google-web-toolkit/issues/detail?id=4020#c8fortheworkaround.
  
  
   If you are using an XmlAdapter (the class) in client code, move it to 
   server side (i.e., keep your marshalling/unmmarshalling logic in the 
   server). 
  
   I assumed you are using GWT-RPC of course. With RequestFactory you 
 should 
   have no problem at all. 
  
   On Wednesday, June 20, 2012 11:33:54 PM UTC+2, shawnjohnson wrote: 
  
   I am having this issue as well.  The annotations are in models in our 
   'shared' package - shared between client and server.  Anyone know 
 what I 
   should change to resolve this? 
  
   On Thursday, December 30, 2010 1:38:27 PM UTC-5, Andrea Boscolo 
 wrote: 
  
   I suppose you are trying to use that annotation on a client side 
   class; javax is not emulated by gwt compiler, so you couldn't use it 
   client side. 
  
   Why not moving the adapter to the server side? Does your client 
 really 
   need it? 
   Annotated jaxb classes can be used by the client (with a couple of 
   tweaks and not for all annotations), but marshalling/unmarshalling 
 to/ 
   from xml, still need to be handled server side. In this point of 
 view, 
   the adapter can be known only to your server. 
  
   I can tell you the tweak, but first try to move it server side.

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Re: XmlAdapter compile error

[Andrea Boscolo]

Such annotations are not GWT compatible (i.e., they are not known to the 
GWT emulated JRE and definitely cannot be compiled in js, even providing 
the relative sources - that I think they can be found in jaxb-api-src.jar 
inside the jaxb distribution).
To allow jaxb annotations (and annotations only) to be used in 
client/shared side, you have to tell the gwt compiler to compile those 
classes ignoring such annotations while still allow the server side to use 
them.
See http://code.google.com/p/google-web-toolkit/issues/detail?id=4020#c8 
for the workaround.

If you are using an XmlAdapter (the class) in client code, move it to 
server side (i.e., keep your marshalling/unmmarshalling logic in the 
server).

I assumed you are using GWT-RPC of course. With RequestFactory you should 
have no problem at all.

On Wednesday, June 20, 2012 11:33:54 PM UTC+2, shawnjohnson wrote:

 I am having this issue as well.  The annotations are in models in our 
 'shared' package - shared between client and server.  Anyone know what I 
 should change to resolve this?

 On Thursday, December 30, 2010 1:38:27 PM UTC-5, Andrea Boscolo wrote:

 I suppose you are trying to use that annotation on a client side 
 class; javax is not emulated by gwt compiler, so you couldn't use it 
 client side. 

 Why not moving the adapter to the server side? Does your client really 
 need it? 
 Annotated jaxb classes can be used by the client (with a couple of 
 tweaks and not for all annotations), but marshalling/unmarshalling to/ 
 from xml, still need to be handled server side. In this point of view, 
 the adapter can be known only to your server. 

 I can tell you the tweak, but first try to move it server side. 



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Re: SuperDevMode and APT

[Andrea Boscolo]

I can confirm that copying the CodeServer's .gwt.rpc files in the local war 
dir, works but it's a pain: every time they change, they need to be copied.
Using a -workDir under the war didn't work for me. The CodeServer output 
directory structure does not help.
In http://tbroyer.posterous.com/how-does-gwts-super-dev-mode-work (thanks 
for the clarifications Thomas) is it said that can be possible to override 
loadSerializationPolicy to search for the SuperDevMode app space. Haven't 
tried yet, I'll find the time to check this out.
Anyway, seems strange that the new development mode does not work well with 
GWT-RPC. Probably I see the problem from the wrong point of view.

On Friday, June 8, 2012 3:36:13 PM UTC+2, Stefano Ciccarelli wrote:

 The .gwt.rpc files are correctly generated in the war relative to the 
 CodeServer workDir, I have to found a way to copy them to the container war 
 when they change (not quite often), would be nice if the CodeServer could 
 do that for me :)


 2012/6/8 Thomas Broyer t.bro...@gmail.com



 On Friday, June 8, 2012 2:18:28 PM UTC+2, Stefano Ciccarelli wrote:

 I know, I'm using App Engine as a servlet container. But the problem is 
 to generate .gwt.rpc files that are compatibles with the compiled 
 javascript generated by SuperDevMode.


 Oops, sorry; I read too fast.

 Switch to RequestFactory? ;-)

 More seriously, I doubt it'll ever be possible to use GWT-RPC with 
 SuperDevMode, due to how/where it generates its output; though maybe you 
 could tweak the way serialization policies are loaded on the server-side? 
 (hmm, with AppEngine, that might be impossible, as you'd have to access 
 files on the file-system; or maybe set SuperDevMode's workDir as a 
 subfolder of your -war?)
  
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 Nel mondo esistono 10 categorie di persone, quelle che capiscono il 
 binario e quelle che non lo capiscono.
  

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Re: can DialogBox has a x close button in the upper right hand corner like most window have?

[Andrea Boscolo]

DialogBox uses a Caption element for the header. By default the caption is 
simply text.
Extend it to provide all the buttons you need.
Search in the groups to find out some samples.

On Thursday, May 31, 2012 10:54:44 AM UTC+2, tong123123 wrote:

 I think it is very difficult if not impossible, just requested by my 
 company and try to ask here.


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Re: resize celltable column by user using mouse

[Andrea Boscolo]

It's not possible using the current API.
See http://code.google.com/p/google-web-toolkit/issues/detail?id=6401 for a 
couple of useful workarounds.

On Thursday, April 12, 2012 11:17:41 AM UTC+2, tong123123 wrote:

  how to allow user to just use the mouse to drag the column widths to a 
 desired size by grabbing an edge of the header with the mouse?
 in gwt 2.4 developer guide, it just tell set table layout to fixed and 
 then set the column width in code, but I want allow user can drag the 
 column width with mouse, it is very common property of gird like structure.
 Any method to do it in gwt 2.4?


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Re: gwt

[Andrea Boscolo]

Read the docs at least.
https://developers.google.com/web-toolkit/gettingstarted

On Monday, April 2, 2012 1:52:27 PM UTC+2, monal wrote:

 How to download  use projectCreator

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Re: Source maps

[Andrea Boscolo]

Are you sure the whole machinery is already available in the public (trunk) 
repo? I thought it's not.

https://plus.google.com/u/1/110412141990454266397/posts/Nvr6Se6eAPh

On Sunday, April 1, 2012 12:16:05 PM UTC+2, Honza Rames wrote:

 Hi everyone,
 I tried to compile my GWT app with source maps support (as explained here 
 http://stackoverflow.com/questions/9804492/how-to-try-sourcemaps-with-gwt) 
 and it failed at first (some json stuff was missing) so I added it to my 
 project's class path then it compiled OK and I can see the source maps 
 generated in WEB-INF/deploy/project/symbolMaps. I should also note 
 that I'm using custom build of GWT from trunk. I enabled source maps 
 support in Chrome's Developer tools setting panel but I the source maps 
 doesn't seem to work. I'm launching the app through jetty but not in dev 
 mode (obviously ;-) ) I compiled the project in obfuscated mode as standard 
 compile (no draft or anything like that). Do I have to use another version 
 of Chrome? Does anyone tried this as well and succeeded?

 Honza


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Re: Programming a custom scrollbar with GWT

[Andrea Boscolo]

I don't know if this is related, but starting from GWT 2.3 (I think) there 
is a CustomScrollPanel that allows to provide custom scrollbars to override 
native ones. But you have to create them by yourself.
http://code.google.com/p/google-web-toolkit/source/browse/trunk/user/src/com/google/gwt/user/client/ui/CustomScrollPanel.java

Relevant commit: http://gwt-code-reviews.appspot.com/1427804/

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Re: ScrollPanel with a CellList Widget

[Andrea Boscolo]

See the showcase sample 
http://gwt.google.com/samples/Showcase/Showcase.html#!CwCellList

On Thursday, March 22, 2012 11:38:18 AM UTC+1, Saik0 wrote:

 Hi @all,

 i have a confusing issue with the ScrollPanel. Im trying to add a CellList 
 with n-Elements to a ScrollPanel. The ScrollPanel itself is add to a 
 VerticalPanel. Now i add more Elements to the Celllist and redraw the view. 
 Normally i except, that the ScrollPanel shows his Scrollbar if the CellList 
 reached a certain Element size but the ScrollBar don't show up and no 
 scrolling is visible..

 is this possible with a CellList? Is there a good anywhere example?

 kind regards

 Saik0


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Re: GWT FileUpload - Servlet options and handling response

[Andrea Boscolo]

Check out the http://code.google.com/p/gwtupload/ project. Easy to use and 
extend.

On Friday, March 16, 2012 10:27:39 PM UTC+1, Ashish wrote:

 I am new to GWT and am trying to implement a file upload 
 functionality. Found some implementation help over the internet and 
 used that as reference. But have some questions related to that: 

 The actual upload or writing the contents of file on server(or disk) 
 will be done by a servlet. Is it necessary that this servlet (say 
 MyFileUploadServlet) extends HttpServlet? OR 
 I can use RemoteServiceServlet or any other servlet or implement any 
 other interface? If yes, which method do I need to implement/override? 

 In my servlet, after everything is done, I need to return back the 
 response back to the client. I think form.addSubmitCompleteHandler() 
 can be used to achieve that. From servlet, I could return text/html 
 (or String type object) and then use SubmitCompleteEvent.getResults() 
 to get the result. 
 Question is that can I use my custom object instead of String (lets 
 say MyFileUploadResult), populate the results in it and then pass it 
 back to client? or can I get back JSON object? 

 Currently, after getting back the response and using 
 SubmitCompleteEvent.getResults(), I am getting some HTML tags added to 
 the actual response such as : 

 pre Image upload successfully /pre . 

 Is there a way to get rid of that? 

 Thanks a lot in advance! 

 Regards, 

 Ashish

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Re: Custom header using CompositeCell or AbstractCell

[Andrea Boscolo]

GWT 2.5 will give this opportunity I guess.
Relevant issue is 
http://code.google.com/p/google-web-toolkit/issues/detail?id=5423#c13

Relevant commits are:
http://gwt-code-reviews.appspot.com/1501803
http://gwt-code-reviews.appspot.com/1499808/

Relevant demos are:
http://showcase2.jlabanca-testing.appspot.com/#!CwCustomDataGrid
http://showcase3.jlabanca-testing.appspot.com/#!CwCustomDataGrid

I you can't wait for the 2.5 release you can use the trunk.

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Re: How to add a link (anchor) to a CellTable?

[Andrea Boscolo]

See docs: 
http://code.google.com/webtoolkit/doc/latest/DevGuideUiCustomCells.html

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Re: Collapsible Component in GWT2.4

[Andrea Boscolo]

For an example, check the third comment (from Mauro) on 
https://groups.google.com/forum/#!topic/google-web-toolkit/C6S4jS1UsM0/discussion
 
and see if it fits you needs. The sample is beyond simple layouting but you 
can find the collapsing/resizing logic you are looking for in the 
AppLayoutImpl class.

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Re: The (currently) definite way to achieve Push/Comet/Streaming in a GWT app? :)

[Andrea Boscolo]

There are a lot of libraries out there dealing with comet/push/reverse ajax 
technology. Some could be:

- http://code.google.com/p/gwt-comet/ (I don't see a valid update in almost 
an year)
- http://code.google.com/p/rocket-gwt/wiki/Comet (over 2 year of inactivity)
- http://code.google.com/p/atmosphere-gwt-comet/ (should be a gwt wrapper 
for atmosphere)
- http://code.google.com/p/gwt-comet-streamhub/ (I don't know if it could 
be work with tomcat)
- http://code.google.com/p/gwteventservice/ (updated, can be easily used 
with RPC, long polling/streaming options)

There are also websocket libraries 
(http://code.google.com/p/gwt-websocketrpc/wiki/ServerPushExample 
http://code.google.com/p/gwt-ws/), servlet 3.0 suspend/resume options, 
server-event communications and so on.
Probabily there are too many options to look into...

http://code.google.com/p/google-web-toolkit/issues/detail?id=267colspec=ID%20Type%20Status%20Owner%20Milestone%20Summary%20Stars
 
worth a read, even if it states a PatchesWelcome status and is ment for 
request factory.

GWT has always been server-agnostic, so you can still use whatever server 
tech you prefer. Of course by using servlets/app engine you can find some 
advantages.

Hope that helps.
Andrew.

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Re: The (currently) definite way to achieve Push/Comet/Streaming in a GWT app? :)

[Andrea Boscolo]

It has its own group: 
https://groups.google.com/forum/?hl=it#!forum/gwteventservice and forum 
http://gwteventservice.freeforums.org/
I've been using it in the last few weeks and looks (and works) good for my 
simple requests.

Andrew.

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Re: Basic MDI (Multiple Document Interface) question

[Andrea Boscolo]

Interesting.
Can you share the resize part if by resize you mean via mouse?

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Re: When will you launch the GWT plugin for Firefox 8?

[Andrea Boscolo]

Check the relevant topic: 
https://groups.google.com/forum/#!topic/google-web-toolkit/wElYN-Thi2M

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Re: ClientBundle not able to set background image

[Andrea Boscolo]

Should be ImageResource yes, and I also think the setBackgroundImage(...) 
method accepts a String, not an ImageResource.

In the 2.4 release you should use

...setBackgroundImage(clientbundle.topbar2().getSafeUri().asString());

cause in 2.4 the getUrl() in the ImageResource is deprecated.

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Re: hoe to make GWT TabPanel draggable and resizable

[Andrea Boscolo]

Can 
http://allen-sauer.com/com.allen_sauer.gwt.dnd.demo.DragDropDemo/DragDropDemo.html#ResetCacheExample
 
helps you out?

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Re: GWT 2.4 MVP tutorial

[Andrea Boscolo]

http://code.google.com/webtoolkit/doc/latest/DevGuideMvpActivitiesAndPlaces.html

It explains how activities and places can be used in a MVP way. It 
references a helloworld sample, but in the mid of the doc there's also a 
link to another and more complete sample (mobilewebapp) that takes in 
account many other things.

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Re: Places Activities any suggestion?

[Andrea Boscolo]

See 
https://groups.google.com/forum/?starthl=en#!starred/google-web-toolkit/PzlyZ3Gjazg

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Re: SliderBar

[Andrea Boscolo]

The incubator project is dead and no longer suppoted by gwt.
Anyway you can fin it here: 
http://code.google.com/p/google-web-toolkit-incubator/

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