Checking if NSButton is down on drawRect

Question

I would like to check if my custom NSButton is currently in a pressed state (the user is clicking down on it) in my custom drawRect method. Something like this:

- (void)drawRect:(NSRect)dirtyRect{
    if ([self buttonIsInPressedState]) {
        [[self alternateBGImage] drawInRect:dirtyRect fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0f];
    }else{
        [[self BGImage] drawInRect:dirtyRect fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0f];
    }
    [super drawRect:dirtyRect];
}

How would you check a thing like that? Is it possible?

SOLUTION

I ended up checking the mouseDownFlags on the buttons cell. Don't know if it's the "right" way to do it, so let me know if you have a better suggestion:

- (void)drawRect:(NSRect)dirtyRect{        
    if ([self.cell mouseDownFlags] == 0) {
        [[self BGImage] drawInRect:dirtyRect fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0f];
    }else{
        [[self alternateBGImage] drawInRect:dirtyRect fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0f];
    }

    [super drawRect:dirtyRect];
}

Answer 1

I solved this by checking [self isHighlighted].