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POmouseDown event on NSSlider
 

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    <p>I have hit a bit of a wall and would really appreciate some help.</p> <p>I have an NSSlider that I am using to control the jog speed of a QTMovie.</p> <p>I want the rate of the video to playback according to the slider value. This is easy to do.</p> <p>The problem is that I want the NSSlider to reset to '0' when the user's event "mouseUp" is completed. I can't seem to get this event to work, so I have subclassed NSSlider and implemented mousedown &amp; mouseup methods, and added a delegate to the NSSlider subclass and connected that to my app's controller.</p> <p>It sort of works, but there is a massive delay on the slider - it slides fine, but the video rate doesn't change, and only does when I 'mouseUp' - basically it seems the mouseDown is called on the MouseUp.</p> <p>I hope some of that makes sense.</p> <p>Hopefully someone out there can help me out,</p> <p>Cheers,</p> <p>Adam</p> <pre><code>enter code here </code></pre> <p>my NSSlider subclass .m file:</p> <pre><code>@implementation TimeScrubberSlider   @synthesize delegate;     - (void)mouseDown:(NSEvent *)theEvent  {   // dispatch_queue_t myQueue = dispatch_queue_create("com.mycompany.myqueue", 0); // dispatch_async(myQueue, ^{     NSLog(@"mouseDown");   [super mouseDown:theEvent];   if ([delegate respondsToSelector: @selector(doScrubTime:)])   {   [delegate doScrubTime:nil];   }   [super mouseDown:theEvent];   // ); // dispatch_release(myQueue);   }     - (void) mouseUp: (NSEvent*) theEvent {   NSLog(@"mouseUp TimeScrubber");   [super mouseUp:theEvent];   [self setDoubleValue:0];   if ([delegate respondsToSelector: @selector(doScrubTime:)])   {   [delegate doScrubTime:nil];   }   [super mouseUp:theEvent];   }   </code></pre>
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