Re: Is there a GWT book covering version >= 2.1.1?

[Ben Munge]

Thanks for the tip BM!

On Sep 8, 9:57 am, BM  wrote:
> Have you checked the Manning's GWT in Action Second Edition book? They
> have it on MEAP program. This book is awesome. They cover the latest
> 2.3 version with extensive coverage on UIBinder, RPC, MVP, Activities
> and Places, RequestBuilder. They are in fact going to add chapter on
> RequestFactory also.
>
> This book is a must buy.
>
> On Sep 8, 8:18 am, tom  wrote:
>
>
>
>
>
>
>
> > Hello,
>
> > Does anybody know if there's a book (about to be published?) that covers the
> > new features since 2.1.1 (RequestFactory, Editor framework, ...)?
>
> > I'm working with GWT (v2.3) for a couple of weeks now, and I'm still getting
> > stuck for hours on simple problems day by day. I think it's mainly because
> > of a lack of thorough documentation/explanation of the mechanisms the
> > framework is built upon. The Getting started guides on the project page were
> > helpful to get some code together at first, but it turned out a lot of
> > things aren't just working as simple.
>
> > I have no doubt that the framework's great and that you can build great apps
> > with it, but learning how to use it is so frustrating at times...
>
> > Regards
>
> > Tom

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Re: Conditional CSS & Updates

[Ben Munge]

I don't think you can do this with conditional styles. I think you'd
be better off firing an event on the event bus when they orientation
changes and just change class/style through an event handler.

On Aug 29, 12:39 am, rth  wrote:
> Hi,
>
> I have a Conditional CSS block that calls isPortrait() at runtime and
> correctly renders the right rule based on its return value. My problem
> is that I cannot figure out how to get the condition to be reevaluated
> in the future (e.g., when the orientation changes, I would like to
> have the conditional CSS evaluated again and the page rendered with
> the new CSS). My sample CSS is below.
>
> @if (org.foo.Application.isPortrait()) {
>         .stats {
>                 border: 3px solid red;
>         }} @else {
>
>         .stats {
>                 border: 3px solid blue;
>         }
>
> }
>
> The docs (http://code.google.com/webtoolkit/doc/latest/
> DevGuideClientBundle.html#Conditional_CSS) states that these
> conditions are evaluated at runtime (which I can confirm), so I am
> hoping I can somehow force the re-evaluation to happen again.
>
> Any pointers would be greatly appreciated.
>
> --rth

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Re: Is there a GWT book covering version >= 2.1.1?

[Ben Munge]

There does seem to be a lack of valuable GWT books covering some of
the newer aspects of the language. Have you gone through all the
tutorials on the main site? I found the large scale application
development and MVP pattern w/ UIBinder tutorial extremely valuable
when learning the framework:

http://code.google.com/webtoolkit/articles/mvp-architecture-2.html

On Sep 8, 8:18 am, tom  wrote:
> Hello,
>
> Does anybody know if there's a book (about to be published?) that covers the
> new features since 2.1.1 (RequestFactory, Editor framework, ...)?
>
> I'm working with GWT (v2.3) for a couple of weeks now, and I'm still getting
> stuck for hours on simple problems day by day. I think it's mainly because
> of a lack of thorough documentation/explanation of the mechanisms the
> framework is built upon. The Getting started guides on the project page were
> helpful to get some code together at first, but it turned out a lot of
> things aren't just working as simple.
>
> I have no doubt that the framework's great and that you can build great apps
> with it, but learning how to use it is so frustrating at times...
>
> Regards
>
> Tom

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Re: is there a Naming conventions of gwt?

[Ben Munge]

Could you be more specific? GWT does utilize convention over
configuration in several aspects. This is especially apparent in the
UIBinder model where naming conventions allow you to easily associate
Java elements and methods with the defined elements in your ui.xml.

On Sep 8, 5:26 am, wahaha  wrote:
> is there a Naming conventions of gwt?

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Re: UiHandler and how to do it right?

[Ben Munge]

Do you have a corresponding field in your UIBinder ui.xml with the
same ui:field property?

For example, in your ui.xml you should have:

Click Me

In the corresponding Java class you should have:

@UiField
Button button;

@UiHandler("button")
void clickButton(ClickEvent e) {
Window.alert("Hello World");
}


As Steve said, the method name on the UiHandler can be anything. The
parameter to the method determines the event being handled. As long as
your ui:field property, the variable name on the UIField, and the
quoted text on the @UiHandler annotation match everything should work
fine.


On Sep 8, 6:55 am, Volker  wrote:
> I try to get a button working using UiBinder with UiHandler.
> Unfortunately the screen shows up fine but the button does not react
> on any clicks. While searching for some good examples how to use the
> UiHandler annotation I got confused.
>
> The tutorial on the official gwt site says:
> @UiHandler("button")
> void handleClick(ClickEvent e) {
>     Window.alert("Hello, AJAX");}
>
> http://code.google.com/intl/de-DE/webtoolkit/doc/latest/DevGuideUiBin...
>
> The UiHandler Java doc point to some test code telling me:
> @UiHandler({"buttonClick", "labelClick"})
> void doClick(ClickEvent event) {
>     eventMessage(event);
>
> }
>
> http://code.google.com/p/google-web-toolkit/source/browse/releases/2
>
> Searching this group I got totaly lost, because it looks like some
> implicit naming convention:
> @UiHandler("lastName")
> void onLastNameBlur(BlurEvent event) {
>   // code from UpperCase goes here}
>
> http://groups.google.com/group/google-web-toolkit/browse_thread/threa...
>
> Thanks in advance for any clarification.

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Re: RequestFactory Best Practices: How to share object between client and server

[Ben Munge]

You generally shouldn't be doing this from a design standpoint. If you
want to share some simple objects or utilities you could use the
shared package, but beyond that would break encapsulation. If you
could explain your requirements in a bit more detail I might be able
to provide better assistance.

On Aug 4, 11:24 am, br22  wrote:
> Great, but how you make the SAME Java code (that runs both on the
> client and the server) share the SAME object (not 2 objects like Obj1
> and Obj1Proxy)?
>
> On Aug 4, 11:34 am, Ben Munge  wrote:
>
>
>
>
>
>
>
> > You create a Proxy object on the client for your corresponding server
> > object.
>
> >http://code.google.com/webtoolkit/doc/latest/DevGuideRequestFactory.html
>
> > On Aug 4, 5:46 am, br22  wrote:
>
> > > Sometimes you want the same Java code to run on the client and server.
> > > With RPC it is easy to share the same object, what is the best way to
> > > do this with RF?
> > > Thank You.

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Re: RequestFactory Best Practices: How to share object between client and server

[Ben Munge]

You create a Proxy object on the client for your corresponding server
object.

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


On Aug 4, 5:46 am, br22  wrote:
> Sometimes you want the same Java code to run on the client and server.
> With RPC it is easy to share the same object, what is the best way to
> do this with RF?
> Thank You.

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Re: Does GWT has any framework or class or something for accessibility (especially for client side )

[Ben Munge]

I'm not sure what you mean exactly. Accessibility is driven much more
by the content and construction of your pages. A framework cannot make
assumptions about accessibility because it doesn't know what your site
is trying to express. If you follow the UI Binder approach, just
construct your elements in the most accessible way that fits your site
(tab indexing, alt comments, descriptive links, etc).

On Aug 2, 12:38 am, mmb  wrote:
> Hi Everyone ,
> I just started learning GWT  ,is there any kind of framework or API's
> for client side accessibility for GWT,i know there is a library for
> provider side i.e com.google...ui.accessibility,but i want framework
> or class at the client side
> thanks in advance for those who reply..

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Re: Dynamically convert between TextBox and PasswordTextBox

[Ben Munge]

Yes you should be able to, however you are not. There is no
constructor for PasswordTextBox that takes in a TextBox. I ended up
just using getElement and setting the attribute directly.

textBox.getElement().setAttribute("type", "password");

On Jul 29, 3:17 pm, Gal Dolber  wrote:
> From a code and css points of view they are exactly the same. You should be
> able to change from TextBox to PasswordTextBox without changing anything.
>
>
>
>
>
>
>
>
>
> On Fri, Jul 29, 2011 at 5:05 PM, Ben Munge  wrote:
> > I have a requirement to turn some financial fields into masked fields
> > and I wanted to use the password input type to simplify the logic. I
> > need to be able to change a TextBox to a PasswordTextBox and have it
> > change the value in the box to circles without affecting the value or
> > style of the element. I'm having trouble finding a good way to do this
> > as TextBox does not let you modify the type property. Any advice/help
> > would be greatly appreciated.
>
> > Thanks!
>
> > --
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>
> --
> Guit: Elegant, beautiful, modular and *production ready* gwt applications.
>
> http://code.google.com/p/guit/

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Dynamically convert between TextBox and PasswordTextBox

[Ben Munge]

I have a requirement to turn some financial fields into masked fields
and I wanted to use the password input type to simplify the logic. I
need to be able to change a TextBox to a PasswordTextBox and have it
change the value in the box to circles without affecting the value or
style of the element. I'm having trouble finding a good way to do this
as TextBox does not let you modify the type property. Any advice/help
would be greatly appreciated.

Thanks!

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Re: HTML ids for widgets generated in a celltable

[Ben Munge]

Just curious, but why do you need ID's? Xelibrety's solution should
work but you should be able to add any behavior you want to the
objects through GWT without the need for an ID. If you have JavaScript
that needs IDs to access them, you might as well just port Xelibrety's
code over the JavaScript in question.

On Jun 22, 6:50 am, nirav patani  wrote:
> Hi,
>
>     Is there a way to add html ids to widgets generated in a
> celltable. for instance i have cell table whose one column contains
> only buttons. i wantto set HTML ids for those buttons.
>
> Thanks.

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Re: GMail like selection combobox

[Ben Munge]

It's a pretty simple Widget. The checkbox itself is simply a standard
check box. The event would check all if clicked and unchecked all if
unchecked. The box around it is simply a div styled as a button with a
click event. The click event shows the dropdown which is simply
another collection of divs, each with their own click event to check
the checkboxes of the appropriate type. There's nothing overly unique
about the widget as a whole. Take a look at the Gmail html of the
option and it should be pretty easy to build.

On Jun 17, 4:09 pm, joel  wrote:
> In GMail there is a combobox that shows a checkbox, you can drop-down
> the box and get the selections such as "all"/"none"... If you click
> the checkbox it will checkmark all your emails...
>
> How can I make that widget with GWT?
>
> J

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Re: No source code is available for type java.lang.NoSuchFieldError

[Ben Munge]

In your GWT console double click the individual errors and you should
get a more detailed stack trace. It likely is something wrong with
your code rather then a missing import/resource. I've gotten a similar
error in the past and it's not overly intuitive.

On Jun 20, 1:59 pm, Nathan Klatt  wrote:
> I've inherited a GWT project and I'm receiving the following compiler error
> (more info below):
>
> [java] [ERROR] Line 51: No source code is available for type
> java.lang.NoSuchFieldError; did you forget to inherit a required module?
>
> It's complaining about a core part of the language here, right? Why is it
> looking for source code for it at all? Is it not finding one of the core jar
> files? Do I need to point it at something in the ant build.xml file?
>
> For testing purposes, I followed all the GWT 
> instructions,
> used webAppCreator to generate a "Hello, world." app, and that builds and
> runs just fine. I added a simple try...catch(NoSuchFieldError err) - and an
> import java.lang.NoSuchFieldError line - and it gave me the error.
>
> I'm new to this Java/GWT stuff so I suspect I'm missing something obvious -
> I'd love it if you could point out exactly what! :)
>
> Thanks.
>
> =
>
> $ ant build
> Buildfile: build.xml
>
> libs:
>
> javac:
>     [javac] Compiling 1 source file to
> /home/nklatt/gwt-2.3.0/MyWebApp/war/WEB-INF/classes
>
> gwtc:
>      [java] Compiling module com.mycompany.mywebapp.MyWebApp
>      [java]    Validating newly compiled units
>      [java]       [ERROR] Errors in
> 'file:/home/nklatt/gwt-2.3.0/MyWebApp/src/com/mycompany/mywebapp/client/MyW 
> ebApp.java'
>      [java]          [ERROR] Line 51: No source code is available for type
> java.lang.NoSuchFieldError; did you forget to inherit a required module?
>      [java]    Finding entry point classes
>      [java]       [ERROR] Unable to find type
> 'com.mycompany.mywebapp.client.MyWebApp'
>      [java]          [ERROR] Hint: Previous compiler errors may have made
> this type unavailable
>      [java]          [ERROR] Hint: Check the inheritance chain from your
> module; it may not be inheriting a required module or a module may not be
> adding its source path entries properly
>
> BUILD FAILED

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Re: Unable to load module entry point class

[Ben Munge]

Can you post your code for WelcomePage?

On Jun 20, 11:42 am, SCK  wrote:
> Hi,
>
> I'm new developer in GWT. I try somthing and when I want to Run the
> application, I get error "Failed to load Module".
> See error in below:
>
> [ERROR] Unable to load module entry point class
> com.Habou.client.WelcomePage (see associated exception for details)
> com.google.gwt.core.client.JavaScriptException: (TypeError):
> '$wnd.Ext.StatusBar' a la valeur Null ou n'est pas un objet.
>  number: -2146823281
>  description: '$wnd.Ext.StatusBar' a la valeur Null ou n'est pas un
> objet.
>         at com.gwtext.client.widgets.Component.checkExtVer(Native Method)
>         at com.gwtext.client.widgets.Component.(Component.java:108)
>         at com.Habou.client.WelcomePage.createComponents(WelcomePage.java:31)
>         at com.Habou.client.WelcomePage.onModuleLoad(WelcomePage.java:24)
>
> Thank you for your Help

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