How to define and read Global JavaScript Variable in GWT

[Ashish Khivesara]

Is there a way to define a global javascript variable in GWT? 

I was able to define one in a sample.js file and then read the same using a JSNI native method. 

But was wondering if there is a way to this purely in Java (GWT) . 

My goal is to be able to have a global object that can be shared between multiple gwt apps which are modules inside the same project.

Thanks

Ashish 

[Ashish Khivesara]

In Java we would define static variables to do something like this. Is that the correct approach I can take here as well?

thanks

[obesga]

Look at

http://code.google.com/intl/en/webtoolkit/doc/latest/DevGuideCodingBasicsJSNI.html

But, into GWT, you can define a static variable in one class, it'll
work as expected

There are no 'global variables' in Java, but you can do

/*********** Example 1 ***************/
class MyModule{
// Defines a global var in Js accesible by Java code
public static native void setVaar(String value) /*-{
$wnd.vaar = value;
}-*/;

public static native String setVaar() /*-{
return $wnd.vaar;
}-*/;

public void onModuleLoad(){
setVaar("");
}

}
/*********** Example 2 ***************/

class MyModule{

// Defines a static var in Java accesible by Js code
public static native void initJs() /*-{
$wnd.getVaar = function(){
return @com.google.gwt.examples.MyModule::vaar;
};
}-*/;

public static String vaar = "";

public void onModuleLoad(){
initJs()
}

}

On Feb 10, 8:59 pm, Ashish Khivesara <ashish.khives...@gmail.com>
wrote:

> In Java we would define static variables to do something like this. Is that
> the correct approach I can take here as well?
>
> thanks
>
> On Wed, Feb 10, 2010 at 11:51 AM, Ashish Khivesara <
>

[Ashish Khivesara]

Great. Thanks a lot for the confirmation and examples.

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