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In hopes of creating a rollover effect on a button, I created a subclass of NSButton called Button. Button.h: #import <AppKit/AppKit.h> @interface Button : NSButton { } - (void)mouseEntered:(NSEvent *)theEvent; - (void)mouseExited:(NSEvent *)theEvent; - (void)mouseDown:(NSEvent *)ev; - (void)mouseUp:(NSEvent *)theEvent; @end Button.m: #import "Button.h" @implementation Button - (id)initWithFrame:(NSRect)frameRect { self = [super initWithFrame:frameRect]; if(self != nil) { NSLog(@"btn init"); } return self; } - (void)mouseEntered:(NSEvent *)theEvent{ NSLog(@"mouseEntered"); [self setImage:[NSImage imageNamed:@"lockIcon_2.png"]]; [self setNeedsDisplay]; } - (void)mouseExited:(NSEvent *)theEvent{ [self setImage:[NSImage imageNamed:@"lockIcon_1.png"]]; NSLog(@"mouseExited"); [self setNeedsDisplay]; } - (void)mouseDown:(NSEvent *)ev { NSLog(@"mouseDown!"); } - (void)mouseUp:(NSEvent *)ev { NSLog(@"mouseUp!"); } @end With the code above, every time I click on a button I see "mouseDown" in the logs, but I don't see "mouseEntered" nor "mouseExited" (and of course don't see the image change)?? Sadly, I know I'm missing something obvious, but I'm just not seeing it... ???

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