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Re: Window "Flash"
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Re: Window "Flash"

  • Subject: Re: Window "Flash"
  • From: "Louis C. Sacha" <email@hidden>
  • Date: Tue, 13 Jul 2004 23:24:20 -0700
Hello...

You might be able to get the effect you want by using the NSWindow cacheImageInRect: and restoreCachedImage instance methods.

First get the contentView of the window, and get its bounds.
Then cache the contents of that rect using the NSWindow cacheImageInRect: instance method.

Lock focus on the contentView, and do your temporary drawing to create the flash effect (a fill using NSCompositeSourceOver and a color with alpha @ 0.5 ?), and then use the NSWindow flushWindow method to flush the temporary drawing to the screen.

After a slight delay, use restoreCachedImage to restore the original contents of the window and call flushWindow again.


Hope that helps,

Louis


I would like to 'flash' a window, or briefly invert the contents. Any suggestions on how to go about doing this?
Michael
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References: 
 >Window "Flash" (From: Michael Hanna <email@hidden>)

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