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Re: Custom alpha for standard window?

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Re: Custom alpha for standard window?

Subject: Re: Custom alpha for standard window?
From: "John C. Randolph" <email@hidden>
Date: Thu, 4 Nov 2004 01:38:58 -0800


On Nov 3, 2004, at 11:02 AM, Tim Conkling wrote:

I'm interested in applying a custom alpha channel to a standard window. I know that it's possible to call setAlphaValue: to set the a single alpha value for the whole window, but I'm interested in modifying the alpha on a per-pixel basis. Is this possible without creating a custom window shape?

The window has to be non-opaque, and then it's up to whatever views are drawing in that window to determine what the alpha value is for any given pixel. The -setAlpha: API is really for effects like making a window fade in.

Customizing windows is pretty easy, though. See this example:

http://developer.apple.com/samplecode/RoundTransparentWindow/ RoundTransparentWindow.html


-jcr

John C. Randolph <email@hidden> (408) 974-8819
Sr. Cocoa Software Engineer,
Apple Worldwide Developer Relations
http://developer.apple.com/cocoa/index.html


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  >Custom alpha for standard window? (From: Tim Conkling <email@hidden>)




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