Hi Tom

You can simply use the "center" method of the Window class:
http://demo.qooxdoo.org/current/apiviewer/#qx.ui.window.Window

When i write custom window classes that should be centered, i place the
following line in the constructor (or whenever the contents of the
windows change):
this.addListenerOnce("resize", this.center, this);

Cheers - Roman


Thomas Schober wrote:
> Hi,
> 
> i am developing a Application, inherited from qx.application.Standalone.
> Now i want to open a window, which is placed in the center of the
> browser window. How can i get the height and width of the underlying
> canvas ?
> 
> Thank you
> Tom
> 
> 
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