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objective-ceventsnstoolbaritem

NSToolbarItem Subclass not calling events

I've created a subclass for NSToolbarItem and am trying to catch the -(void)mouseDown:(NSEvent *)theEvent in order to change its state (that's what I added in my subclass as NSToolbarItem doesn't support states out of the box).

Problem is that the event mouseDown: is never called, even though I set my toolbar items' class identities in Interface Builder to the one of my new class.

Why is this? NSToolbarItem is related to NSView, so it should be capable of events no?

Solution

  • NSToolbarItem is a subclass of NSObject, not of NSResponder. The event is never called because it is never supposed to handle any. An NSToolbarItem is like a NSDictionary for an NSToolbar, it stores what it needs to draw.