Hi
You should always add the listener as reference to the function, like this:
this.loginListener
NOT: this.loginListener()
the second example will actually call the function and return the
functions return value which is clearly not what you want.
Other than that, i advise you to bind the function to "this" (to make
sure, the function execution takes place in the right context).
Like:
this.loginButton.addListener("execute", this.loginListener, this);
Notice the third parameter here.
Cheers
- Roman
Thomas Schober wrote:
> Hi again :)
>
> i try to make some sort of model, view , controler with a login window,
> but i have a little problem.
>
> In my Application.js i create an instance of my Controler like this :
>
> var loginContrl = new firstapp.controler.loginControler();
> loginContrl.showLogin();
>
>
> The source of the Controler looks like :
>
> qx.Class.define("firstapp.controler.loginControler",
> {
> extend : qx.core.Object,
>
>
>
> construct : function()
> {
> this.loginWindow = new firstapp.ui.loginBox("LoginWindow",null);
> },
>
>
>
>
>
>
>
> members :
> {
> loginWindow : null,
>
>
>
> performLogin : function()
> {
> alert("blub");
> },
>
>
>
> showLogin : function()
> {
> this.loginWindow.open();
> this.loginWindow.addLoginListener(this.performLogin);
> }
>
>
>
> }
>
>
>
> });
>
> Additionally i have a loginWindow class, that looks like this :
>
> /* ************************************************************************
>
> Copyright:
>
> License:
>
> Authors:
>
> ************************************************************************ */
>
> /* ************************************************************************
>
> #asset(firstapp/*)
>
> ************************************************************************ */
>
> /**
> * This is the main application class of your custom application "firstapp"
> */
> qx.Class.define("firstapp.ui.loginBox",
> {
> extend : qx.ui.window.Window,
>
>
>
> /*
>
> *****************************************************************************
> MEMBERS
>
> *****************************************************************************
> */
> construct : function(name,icon)
> {
> this.base(arguments,name,icon);
> this.set
> ({
> modal : true,
> showMinimize : false,
> showMaximize : false,
> allowMaximize : false,
> allowClose : false
>
>
>
> });
>
>
>
> this.addContent();
> },
>
>
>
> members :
> {
>
>
>
> loginButton : null,
> loginListener : null,
>
>
>
> /**
> * This method contains the initial application code and gets called
> * during startup of the application
> */
> addContent : function()
> {
> var windowLayout = new qx.ui.layout.VBox(10);
> this.setLayout(windowLayout);
> this.setMinWidth(300);
> var loginField = new qx.ui.form.TextField("Enter
> Login").set({width: 260});
> var passField = new qx.ui.form.PasswordField("Enter
> Passw").set({width : 260});
> loginButton = new qx.ui.form.Button("Login");
> this.add(loginField);
> this.add(passField);
> this.add(loginButton);
> this.addListenerOnce("resize", this.center, this);
> },
>
>
>
> addLoginListener : function (listener)
> {
> this.loginListener = listener;
> this.loginButton.addListener("execute",this.loginListener());
>
> }
> }
> });
>
> When the loginControler is instantiated, it creates an instance of the
> login window, registers a listener for the button and then it opens the
> window. But the registered listener is not called, when i press the
> button. Nothing happens ? Is it not allowed to hand over a function
> pointer from another class as listener ?
>
> Thank you
> Tom
>
>
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