How to get the on-screen location of an NSStatusItem

Question

I have a question about the NSStatusItem for cocoa in mac osx. If you look at the mac app called snippets (see the movie at http://snippetsapp.com/). you will s

Answer 1

Given an NSMenuItem and an NSWindow, you can get the point that centers your window right below the menu item like this:

fileprivate var centerBelowMenuItem: CGPoint {
    guard let window = window, let barButton = statusItem.button else { return .zero }
    let rectInWindow = barButton.convert(barButton.bounds, to: nil)
    let screenRect = barButton.window?.convertToScreen(rectInWindow) ?? .zero
    // We now have the menu item rect on the screen.
    // Let's do some basic math to center our window to this point.
    let centerX = screenRect.origin.x-(window.frame.size.width-barButton.bounds.width)/2
    return CGPoint(x: centerX, y: screenRect.origin.y)
}

No need for undocumented API's.