Hi Michael,
if you pass function pointers, you will loos the context (as you do in the
listener of the button). JavaScript offers a way of setting the context my
using the call method of functions:
guiMethod :function(method) {
method.call(this.server, this);
},
The first argument is the context and all following parameter will be
available as parameter in the called method.
Best,
Martin
Michael Greifeneder wrote:
>
> Hello,
>
> I have a strange problem, that's probably easily solved with a little
> JavaScript/Qooxdoo knowledge.
> Clicking on the button in the example code below causes this error:
>
> this.internMethod is not a function
> [Break on this error] this.internMethod();\n
>
> Classes test.Application and test.Server are in 2 different files.
> Maybe it's because of lack of JavaScript knowledge, but passing a
> function to another function should work in JavaScript that way? Can
> the closure cause the problem?
> Debugging shows that in class Server the reference "this" points to the
> window?
> Thanks for any hint.
> Mike
>
> qx.Class.define("test.Application",
> {
> extend : qx.application.Standalone,
> members :
> {
> main : function()
> {
> this.base(arguments);
> var button1 = new qx.ui.form.Button("First Button",
> "test/test.png");
> var doc = this.getRoot();
> doc.add(button1, {left: 100, top: 50});
> button1.addListener("execute", function(e) {
> this.guiMethod(this.server.serverMethod);
> }, this);
> },
>
> guiMethod :function(method) {
> method(this);
> },
>
> server: new test.Server()
> }
> });
>
> qx.Class.define("test.Server",
> {
> extend: qx.core.Object,
>
> construct : function() {
> this.base(arguments);
> },
>
> members :
> {
> internMethod : function() {
> alert("Works!");
> },
>
> serverMethod : function() {
> this.internMethod();
> }
> }
> });
>
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