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Re: Erasing drawn content

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Re: Erasing drawn content

Subject: Re: Erasing drawn content
From: Kyle Sluder <email@hidden>
Date: Tue, 8 Jun 2010 10:03:40 -0700

On Jun 8, 2010, at 8:41 AM, Matej Bukovinski <email@hidden> wrote:

Thanks for the suggestion Steve.
Unfortunately this causes the background to turn black and not transparent. I would need the view to become transparent (so the WebView underneath is visible).

You can't do this. All your bees are composited back-to-front into the window's backing store, so filling with anything will obliterate your web view's drawing.

What you need to do is draw the correct stuff in -drawRect:, and invalidate the proper regions using -setNeedsDisplayInRect: in response to changes in your web view.

--Kyle Sluder
(Sent from the line for Pacific Heights at WWDC)
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Follow-Ups:

Re: Erasing drawn content
From: Matej Bukovinski <email@hidden>
Re: Erasing drawn content
From: Kyle Sluder <email@hidden>


References:  
  >Erasing drawn content (From: Matej Bukovinski <email@hidden>)
  >Re: Erasing drawn content (From: Steve Christensen <email@hidden>)
  >Re: Erasing drawn content (From: Matej Bukovinski <email@hidden>)




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