Re: Stopping a NSView from drawing in -drawRect
Re: Stopping a NSView from drawing in -drawRect
- Subject: Re: Stopping a NSView from drawing in -drawRect
- From: "Louis C. Sacha" <email@hidden>
- Date: Fri, 6 Feb 2004 00:27:43 -0800
Hello...
There is a function in the AppKit that might work, it is
NSDisableScreenUpdates (and its opposite NSEnableScreenUpdates). It
should stop all changes in the windows for your app from being drawn
on the screen until you call the enable version.
If you look in the AppKit documentation, in the functions section, it
should be listed under the "Graphics" heading.
Hope that helps,
Louis
I'm drawing a NSTextView and an NSImage to an NSView and doing some
animation with them. The NSTextView works fine, but I have a problem
with the NSImage.
I'm drawing the NSImage using -compositeToPoint:operation:, and I'm
painting out the background using [NSBeizerPath fillRect] just
before drawing the NSImage.
The problem is that the image flickers. Using Quartz Debug I can see
that the whole display is being painted black and then the image is
painted on top, but I want to stop the display until the image is
drawn in place.
Is this possible? I can't find it in the documentation, or in the archives.
--
Phillip Hutchings
email@hidden
http://www.sitharus.com/
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