Try
// Add an event listener
console.log( 'HandlerDef: '+this.__handleButton );
button1.addListener("execute", this.__handleButton, this );
^^^
On Tue, 8 Dec 2009, [email protected] wrote:
>
> Hello!
>
> I try to use a member function as a callback for my P2P Ajax function.
> However, the function is always "undefined". Here is the relevant code of my
> application:
>
>
> --------------8<-------------------------------------------
>
>
> main : function()
> {
> [...]
> // Create a button
> var button1 = new qx.ui.form.Button("First Button", "edemo/test.png");
>
> // Document is the application root
> var doc = this.getRoot();
>
> // Add button to document at fixed coordinates
> doc.add(button1, {left: 120, top: 50});
>
> // Add an event listener
> console.log( 'HandlerDef: '+this.__handleButton );
> button1.addListener("execute", this.__handleButton );
> },
>
> __fillTable : function( pRequest ) {
> alert( pRequest );
> },
>
> __handleButton : function(e) {
> var hrq = new edemo.AjaxTools();
>
> console.log( 'Callback: '+this.__fillTable );
> hrq.sendXMLHTTPRequest( '<QD_FETCH_TEST/>', this.__fillTable, null,
> false );
> }
>
> --------------8<-------------------------------------------
>
> Here the "HandlerDef" trace prints the right method and it is successfully
> assigned to the event handler, OTOH, when calling it and tracing the
> "callback" function, it returns undefined.
>
> I am sure I missed some vital aspect of the OO framework, but can't see why
> doesn't sees the function? Or the this is "lost" (refers to another object)
> for a function when called as an event handler?
>
> Thanks,
> Balage
>
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