Hi Daniel,
Thank you, your suggestion is very interesting.
About the reuse of objects, there is a way for reset to default all the
widget? i see in the api viewer different reset function, there is one
for revert to the init status the widget?
In another project i'm creating a parser that create objects from a
list, and put the unused object in another array, if i want to reuse
these objects, some time i see the old properties.
Regards
Sp
Il giorno mar, 05/07/2011 alle 14.31 +0200, Daniel Wagner ha scritto:
> Hi Simone,
>
> your code fails because when you destroy the Window, it destroys its
> children, including the ColorSelector. Then on the second button press,
> you're trying to add the disposed selector to the new Window which
> causes the exception. So a quick fix would be to move the ColorSelector
> instantiation into the "execute" listener callback function.
>
> However, that would still create a new Window every time the button is
> clicked, which is not what you want (and would be a bad idea since
> creating objects is expensive). Instead, you could implement the
> Singleton pattern. Your button listener would just look like this:
>
> button1.addListener("execute", function(e) {
> this._getWindow().open();
> }, this);
>
> While _getWindow would be a new method that makes sure only one instance
> is created:
>
> _getWindow : function()
> {
> if (!this.__window) {
> var selector = new qx.ui.control.ColorSelector();
> var window = this.__window = new qx.ui.window.Window();
> window.setModal(true);
> window.setLayout(new qx.ui.layout.Basic() );
> window.add(selector);
> }
> return this.__window;
> }
>
>
> Regards,
> Daniel
>
> On 07/05/2011 01:44 PM, Simone Pandolfo wrote:
> > Hi all,
> >
> > i'm trying to have one signle istance of an object, i write a short
> > example:
> > http://tinyurl.com/67fx8hs
> >
> > inside a button listener i create an window object and add to it a
> > listener "beforeClose" to destroy it, but at the next "execute" of the
> > button the window don't be create again and throw an error.
> >
> > Uncaught TypeError: Cannot read property '__fn' of null
> >
> > I need this because i want hide all the other window, and after show
> > again, but if i don't destroy the object i see the window twice, the old
> > istance and the new one.
> >
> > what i wrong?
> >
> > Best Regards
> > Sp
> >
>
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threats, fraudulent activity, and more. Splunk takes this data and makes
sense of it. IT sense. And common sense.
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