Re: Text Animation
Re: Text Animation
- Subject: Re: Text Animation
- From: Dominik Pich <email@hidden>
- Date: Sun, 2 Sep 2007 04:28:56 +0200
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.
For selection for ex. I make the rect or something but then
setNeedsDisplay and draw the selection in the drawRect... I thought
the same as Uli... that's only 'save' to draw at the righ time!?
Regards,
Dominik
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