Unable to get mouse events to register in custom NSViewController

Question

Here's my code, simplified for brevity:

class AppDelegate: NSObject, NSApplicationDelegate {

    @IBOutlet weak var window: NSWindow!
    var fooController: FooController!

    func applicationDidFinishLaunching(aNotification: NSNotification) {

        self.fooController = FooController(frame: self.window.frame)

        self.window.contentViewController = self.fooController
        self.window.makeFirstResponder(self.fooController)
    }
}

class FooController: NSViewController {

    override func mouseUp(theEvent: NSEvent) {
        print("foo")
    }

    override func keyUp(theEvent: NSEvent) {
        print("bar")
    }
}

My MainMenu.xib has a single Window which you can see referenced above in AppDelegate.

When I press a button on my keyboard, I see "bar" in the console. When I click my mouse I see nothing. Once I click my mouse, no further key events are registered.

What am I missing? Why are mouse events stealing the responder chain away, and where is it going?

Answer 1

Like @Willeke mentioned, the first responder is probably changed through the mouse click.

You can set the first responder on mouse down like that:

override func mouseDown(theEvent: NSEvent) {
     self.view.window.makeFirstResponder(self)
}

Now you should be able to receive all events.