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Confusion about transparent windows
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Confusion about transparent windows


  • Subject: Confusion about transparent windows
  • From: Chris Backas <email@hidden>
  • Date: Wed, 27 Aug 2003 16:35:26 -0700

Hello all

I'm developing a full screen application where I want to layer some windows, in the most basic case I have a full-screen-sized window on the bottom that has a few NSViews in it, and then I have a 'Content Window' on top.

The content window is added to the main window as a child, and ordered front to sit on top. This is all well and good. If I change the content window's alpha value I can see the main window below, which is fine too.

What I would like though, is for any region of the content window that doesn't have a View in it to be completely transparent, while the contained views would have a seperate transparency setting (though all the views can share the same).

Originally I thought I could achieve this by setting the content window's background color to NSColor's clearColor, but apparently the background painting goes OVER Aqua's stripes rather than replacing them like I expected so that my end result is that I see these stripes all over and it ruins the look.

Is there some way, even by subclassing if need be, that I can make it leave 'unclaimed' regions of the windows *completely* transparent?

Thanks
Chris Backas
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  • Follow-Ups:
    • Re: Confusion about transparent windows
      • From: "Alastair J.Houghton" <email@hidden>
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