How to make a transparent NSView subclass handle mouse events?

Question

The problem

I have a transparent NSView on a transparent NSWindow. The view\'s drawRect: method draws some content (NSIma

Answer 1

You can override the hitTest method in your NSView so that it always returns itself.

According to the NSView documentation, the hitTest method will either return the NSView that the user has clicked on, or nil if the point is not inside the NSView. In this case, I would invoke [super hitTest:], and then return the current view only if the result would otherwise be nil (just in case your custom view contains subviews).

- (NSView *)hitTest:(NSPoint)aPoint
{
    NSView * clickedView = [super hitTest:aPoint];
    if (clickedView == nil)
    {
        clickedView = self;
    }

    return clickedView;
}