Detect a color change in NSColorPanel

Question

I have some code that opens a NSColorPanel. How would I be able to detect when the color is changed and then run a callback?

NSColorPanel *colorPanel = [NSColorPanel sharedColorPanel];
[colorPanel orderFront:nil];

Thanks in advance.

Answer 1

You should use target action:

NSColorPanel *cp = [NSColorPanel sharedColorPanel];
[cp setTarget:self];
[cp setAction:@selector(colorUpdate:)];

and define the action this way:

-(void)colorUpdate:(NSColorPanel*)colorPanel{ 
    NSColor* theColor = colorPanel.color;
    ....your code

}

Answer 2

There is a method - (void)changeColor:(id)sender. It sends to the first responder when the user selects a color in an NSColorPanel object. You can override this method in any responder that needs to respond to a color change. May be, it can help.