// // AlbumCoverButton.swift // Persephone // // Created by Daniel Barber on 2019/6/28. // Copyright © 2019 Dan Barber. All rights reserved. // import AppKit class AlbumCoverButton: NSButton { var dragging = false override func mouseDown(with event: NSEvent) { nextResponder?.mouseDown(with: event) } override func mouseDragged(with event: NSEvent) { dragging = true nextResponder?.mouseDragged(with: event) } override func mouseUp(with event: NSEvent) { if dragging { dragging = false nextResponder?.mouseUp(with: event) } else { super.mouseDown(with: event) super.mouseUp(with: event) } } }