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Bug
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Resolution: Done
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P2: Important
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4.2.0
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None
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a8e2a457bb7d2fc377c1c65b6a4172974919e055
Dock widgets get reparent when they change dock/floating state, and this re-create the window handle. However, the dockwidgets don't get a ParentChange event, and no other event that would inform user-code about the change of the window handle.