Custom hit test for a contextual menu

I have a transparent NSView which draws a circle. I'd like to customize the hit testing used when displaying a contextual menu.

Currently it uses the bounding rectangle. I want to change it to test for a click inside 开发者_如何学Cthe circle.

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Try overriding NSView menuForEvent: returning nil if you don't want the menu to show up and [super menuForEvent:] if you do.