Re: NSImageView animation
Re: NSImageView animation
- Subject: Re: NSImageView animation
- From: Troy Stephens <email@hidden>
- Date: Mon, 27 Oct 2003 14:08:36 -0800
On Oct 27, 2003, at 10:52 AM, Daryl Thachuk wrote:
>
I see that NSImageView has gotten animation support in Panther but the
>
docs on how it works are rather sparse. Has anyone figured out how the
>
magic works?
Why, just like magic, of course. :^)
Checking the "Animates" box for an NSImageView in Interface Builder, or
sending [imageView setAnimates:YES], enables the view to automatically
play back any animated image that's assigned to it. (Currently,
animated GIFs are supported.)
If what you're asking is how this is implemented, have a look at
NSBitmapImageRep.h. The API is all public. Using the
-setProperty:withValue: and -valueForProperty: methods with the
following keys, you can access the individual frames of an animation
and their properties.
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_2
APPKIT_EXTERN NSString* NSImageFrameCount; // GIF input (int in
NSNumber) (read-only)
APPKIT_EXTERN NSString* NSImageCurrentFrame; // GIF input (int in
NSNumber)
APPKIT_EXTERN NSString* NSImageCurrentFrameDuration; // GIF input
(float in NSNumber) (read-only)
#endif
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_3
APPKIT_EXTERN NSString* NSImageLoopCount; // GIF input (int in
NSNumber) (read-only)
#endif
Troy Stephens
Cocoa frameworks, Apple
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