Changing the Color of a Single Row in an NSOutlineView.

- (void)outlineView:(NSOutlineView *)outlineView 
	willDisplayCell:(id)cell 
	 forTableColumn:(NSTableColumn *)tableColumn 
			   item:(id)item {
	NSColor *color = [cell backgroundColor];
	NSLog(@"Colorizing Method B");
	if (clicked == YES) {
		if (color == [NSColor lightGrayColor]) {
		}else{
		[cell setBackgroundColor:[NSColor lightGrayColor]];
		clicked = NO;
		NSLog(@"Colorizing Method IF 1 END");
		}
	}else{
		if (color == [NSColor lightGrayColor]) {
		}else{
			[cell setBackgroundColor:[NSColor whiteColor]];
		}
		NSLog(@"Colorizing Method ELSE END");
	}
	NSLog(@"Colorizing Method E");
}
	
- (IBAction)colorize:(id)sender{
	NSLog(@"Click Method Begun");
	clicked = YES;
	int selectedRow = [outlineView selectedRow];
	id row = [outlineView itemAtRow:selectedRow];
	[outlineView setNeedsDisplayInRect:[outlineView rectOfRow:selectedRow]];
	NSLog(@"Click Method Ended");
}