AnimatedSlider/AnimatedSliderAppDelegate.m

/*
     File: AnimatedSliderAppDelegate.m 
 Abstract: The Application's delegate. 
  Version: 1.1 
  
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 */
 
#import "AnimatedSliderAppDelegate.h"
 
@implementation AnimatedSliderAppDelegate
 
- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender
{
    return YES;
}
 
/* IBAction called when the user submits the value in the text cell.
 */
- (IBAction)animateToFloatValueFrom:(id)sender
{
        // create a new animation context so we can adjust the duration
    [NSAnimationContext beginGrouping];
    
    [[NSAnimationContext currentContext] setDuration:1.0];
    
        /* Core Animation is unaware of the slider's min and max value and will
         * setup the animation timing as if it were going to be able to
         * move the slider the full way.  If the user enters a value such as
         * 1000 in the text field, the resulting animation will be much faster
         * than if the user entered 100.
         * To work around this we enforce the min/max values ourself before
         * passing them to Core Animation. */
    float value = [(NSTextField*)sender floatValue];
    value = (value > [slider maxValue]) ? [slider maxValue] : value;
    value = (value < [slider minValue]) ? [slider minValue] : value;
    
        // set the new value on the animator proxy, triggering the animation
    [[slider animator] setFloatValue:value ];
    
    [NSAnimationContext endGrouping];
}
 
@end