Open Radar

 
Summary:
If an NSTrackingArea is attached to a view in a Today extension (or, I’m told, any extension at all), the various methods it is supposed to call on its owner are never called.

Steps to Reproduce:
1. Create a Mac project with a Today extension.

1. Write an NSButton subclass with code like this:

    var highlightTrackingArea: NSTrackingArea!
    override func updateTrackingAreas()  {
        super.updateTrackingAreas()
        
        removeTrackingArea(highlightTrackingArea)
        highlightTrackingArea = NSTrackingArea(rect: bounds, options: .MouseEnteredAndExited | .ActiveAlways, owner: self, userInfo: nil)
        addTrackingArea(highlightTrackingArea!)
    }
    
    override func mouseEntered(theEvent: NSEvent!)  {
        super.mouseEntered(theEvent)
        println(“In mouseEntered”)
    }

    override func mouseExited(theEvent: NSEvent!)  {
        super.mouseExited(theEvent)
        println(“In mouseExited”)
    }

3. Set breakpoints in those three methods if desired.

4. Add an instance of that NSButton subclass to the extension’s nib file.

5. Run the extension and mouse over the button.

Expected Results:
mouseEntered() and mouseExited() are called as appropriate.

Actual Results:
These methods are not called.

Notes:
I would like to have a button in my extension that changes appearance (replacing one icon with another) when moused over, but this is not currently possible because of this bug.