How to fill the right bottom corner of NSScrollView?

Question

I want to change its color, but I'm not sure wether to subclass NSScrollView or NSClipView. Or if the corner can be inserted as a regular NSView.

I don't need code. Just a hint at how to do it.

Answer 1

Already answered elsewhere on stackoverflow by mekentosj. The class to subclass is NSScrollView.

@interface MyScrollView : NSScrollView {
}
@end


@implementation MyScrollView

- (void)drawRect:(NSRect)rect{
    [super drawRect: rect];

    if([self hasVerticalScroller] && [self hasHorizontalScroller]){
        NSRect vframe = [[self verticalScroller]frame];
        NSRect hframe = [[self horizontalScroller]frame];
        NSRect corner;
        corner.origin.x = NSMaxX(hframe);
        corner.origin.y = NSMinY(hframe);
        corner.size.width = NSWidth(vframe);
        corner.size.height = NSHeight(hframe);

        // your custom drawing in the corner rect here
        [[NSColor redColor] set];
        NSRectFill(corner);
    }
}
@end