Am 22.09.2010 16:04, schrieb Marius Austerschulte:
> Great! That seems to be the reason! this.isDisposed() and 
> this.__rootNode.isDisposed() are both true.
> But then why is it disposed? I still have a reference that points to 
> that object.
Hi Marius,

I don't know what exactly is the reason in your case, maybe your 
application does it. You can try to debug it buy adding a this.trace() 
in the destruct function [1] in the class which has the appear method. 
The stack trace should show how dispose/destroy the qooxdoo object.

Keep in mind that dispose and destroy has a differer meaning here. It 
just means that a qooxdoo object is cleaned up for garbage collection. A 
qooxdoo dispose/destroy removes for example all DOM references so that 
the garbage collector can remove the object from memory if no reference 
exist in your application.

Cheers,
Chris

[1] 
http://manual.qooxdoo.org/1.2.x/pages/core/oo_feature_summary.html#destructor

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