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Window content synchronization

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Window content synchronization

Subject: Window content synchronization
From: Torsten Radtke <email@hidden>
Date: Fri, 9 Mar 2007 19:12:54 +0100

Hi there,

I would like to synchronize the contents of two windows (i.e. their custom views): one custom view inside the main window draw some graphics, while the other custom view in a semitransparent HUD draws additional information. If I move the HUD the contents changes (works well with a modification of the current transformation function). I update the offset between the two content rectangles in the windowDidMove: method of the custom view in my HUD.

The contents of my HUD window is always drawn after I move the window (since I update my schedule redraw after the window moves) and this results in a visible offset which is larger as I move the window faster.

Is there a possibility to synchronize window movement and content redraw?

If I move my HUD by dragging the window background ([... setMovableByWindowBackground:YES]) the windowDidMove: notifications arrive only if I move the mouse very slowly or stop dragging.

Is there a reason for this behaviour?

Thanks for any help in advance,
Torsten
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