Re: [qooxdoo-devel] Help with qx.ui.window.Window.dispose()

[Simon Bull]

Hi again,

Thanks for the advice -- I tried both of your suggestions.  Moving the dispose() call into a qx.ui.window.Window._afterDisappear() method and adding a qx.constant.Event.DISAPPEAR listener to the window.  Unfortunately both methods still results in the same error messages when dispose is called.

Does anyone have any other suggestions?

Thanks,

Simon

p.s.  While I was looking at this I also noticed that Window.dispose() does not appear to remove all of the event listeners that its constructor adds.  I tried adding the following code to Window.dispose() which seemed to help free some (but not all) of the memory used by a window:

  this.removeEventListener(qx.constant.Event.MOUSEDOWN, this._onwindowmousedown, this);
  this.removeEventListener(qx.constant.Event.MOUSEUP, this._onwindowmouseup, this);
  this.removeEventListener(qx.constant.Event.MOUSEMOVE, this._onwindowmousemove, this);
  this.removeEventListener(qx.constant.Event.CLICK, this._onwindowclick, this);



Sebastian Werner <[EMAIL PROTECTED]> wrote:

The button appearance will be resetted with the mouseup event. I think
you should be able to solve the issue using the "disappear" or
"afterDisappear" event instead of directly handling this in the function.

Cheers,

Sebastian


Simon Bull schrieb:
> Hi All,
>
> I'm using Qx 0.6.2-pre (r4314).
>
> I am trying to dispose() of "closed" qx.ui.window.Window instances so
> that I can minimise the browser's memory usage.
>
> I invoke dispose() at the end of qx.ui.window.Window._onclosebuttonclick().
>
> With this change, clicking the close button hide()s the window as usual,
> but does not seem to be cleanly disposed (no memory appears to be
> freed). The following message appear on the logging console:
>
> qx.ui.form.Button[227]
> 007063: Could not dispatch event of type "mouseup": TypeError -
> 'this._states' is null or not an object (#-2146823281)
> qx.theme.appearance.DefaultAppearanceTheme[7]
> 007063: Couldn't apply state appearance: TypeError - 'abandoned' is null
> or not an object (#-2146823281)
> 007063: Couldn't apply state appearance: TypeError - 'pressed' is null
> or not an object (#-2146823281)
> 007063: Couldn't apply state appearance: TypeError - 'maximized' is null
> or not an object (#-2146823281)
> 007063: Couldn't apply state appearance: TypeError - 'active' is null or
> not an object (#-2146823281)
>
>
> Does anyone know why these errors occur? Is there a clean way to
> dispose of qx.ui.window.Window instances?
>
> Thanks,
>
> Simon
>
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