Hi Jonathan
The problem is that _onFieldMouseDown does not exist – it looks like your
example code is out of date, because since Qx 4.x there’s been a transition to
“pointerxxxx” events over “mouse” events to better support mobile & tablets.
In qx.ui.control.ColorPopup, _onFieldMouseXxxx has also changed to
_onFieldPointerXxxx. EG your code should be:
case "field":
control = new qx.ui.core.Widget;
control.addListener("pointerdown", this._onFieldPointerDown, this);
control.addListener("pointerover", this._onFieldPointerOver, this);
control.addListener("pointerout", this._onFieldPointerOut, this);
break;
However, you don’t need to repeat the entire contents of the overridden
function (and it would be preferable not to, so that the implementation of the
parent class can change without impacting your code) because in this case you
can defer to this.base(arguments, id) to get the controls, and only modify the
one that you want to. Here’s another version: http://tinyurl.com/jbkl8ac
Regards
John
From: Jonathan Wolfe <jonathan.wo...@noaa.gov>
Reply-To: qooxdoo Development <qooxdoo-devel@lists.sourceforge.net>
Date: Friday, 1 January 2016 at 19:08
To: qooxdoo Development <qooxdoo-devel@lists.sourceforge.net>
Subject: [qooxdoo-devel] Override issue
Hi,
I am trying to implement just the ColorSelector window which appears after
selecting the "Open ColorSelector" button in the qx.ui.control.ColorPopup. So,
I thought I would extend the ColorPopup class and just override the
_createChildControlImpl function so that the ColorSelector appears
automatically; however when I do this, I am getting this error:
023800 Assertion error! Failed to add event listener for type 'mousedown' to
the target 'qx.ui.core.Widget': Invalid callback function: Expected value to be
typeof function but found 'undefined'!
Uncaught Failed to add event listener for type 'mousedown' to the target
'qx.ui.core.Widget': Invalid callback function: Exception while creating child
control 'field#0' of widget edd.JQx.ColorSelector[9954-0]: Expected value to be
typeof function but found 'undefined'!
Here is my code snippet:
qx.Class.define("edd.JQx.ColorSelector",
{
extend : qx.ui.control.ColorPopup,
members :
{
// overridden
_createChildControlImpl : function(id, hash)
{
this.base(arguments);
var control;
switch(id)
{
case "field":
control = new qx.ui.core.Widget;
control.addListener("mousedown", this._onFieldMouseDown, this); //
<------------- Fails here
I thought that the this._onFieldMouseDown would be brought along in the
extension, but maybe this has something to do with two arguments being passed
to the _createChildControlImpl function and I'm not capturing it properly? Any
pointers would be greatly appreciated! Thanks and Happy New Year!
Jonathan
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