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Re: Text Animation
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Re: Text Animation


  • Subject: Re: Text Animation
  • From: Scott Anguish <email@hidden>
  • Date: Sat, 1 Sep 2007 18:48:27 -0400


On Sep 1, 2007, at 6:38 AM, Uli Kusterer wrote:

There are only a few places where you're ever allowed to draw in Cocoa: Either between a lockFocus/unlockFocus on an NSImage/ NSImageRep, or from inside the drawRect method of an NSView subclass (that's pure Cocoa, i.e. AppKit -- if you use OpenGL directly or CoreImage or so, there may be other places). You're not supposed to lock focus on a view manually and draw just at any old time.

that's probably a bit strong.

there are cases where locking focus, drawing, and then unlocking focus outside of these cases are useful (in the AppKit domain) . I believe at least one common case is creating selection rectangles/indicators.


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References: 
 >Re: Text Animation (From: Uli Kusterer <email@hidden>)

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