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How do I implement isPointObscured?

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How do I implement isPointObscured?

Subject: How do I implement isPointObscured?
From: Jonathan del Strother <email@hidden>
Date: Thu, 13 Oct 2005 17:43:22 +0100

I need to tell if a point in my view is obscured by other application's windows. From the docs for -[NSWindow isVisible] :

> Returns YES if the receiver is onscreen (even if it’s obscured by other windows).

OK, so there doesn't appear to be a built-in method. Any suggestions on implementing it? AFAICT there's no way of getting a system-wide list of windows within the Cocoa API, so maybe this is to the wrong mailing list. Is Carbon the best way of doing this?

Jon

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