cog/Utils/TrackingCell.h

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/* TrackingCell */
#import <Cocoa/Cocoa.h>
@interface TrackingCell : NSSliderCell {
BOOL tracking;
}
- (BOOL)startTrackingAt:(NSPoint)startPoint inView:(NSView *)controlView;
- (void)stopTracking:(NSPoint)lastPoint at:(NSPoint)stopPoint inView:(NSView *)controlView mouseIsUp:(BOOL)flags;
- (BOOL)isTracking;
@end