Simple mouseover effect on NSButton

Question

I am creating a custom NSButtonCell for a custom rendering.

Now, I want to have different aspect depending if the mouse is over the button or not. How can

Answer 1

This is a simple code to track mouse enter and mouse exit events on some controls (Images, Label, etc...):

@IBOutlet weak var myImage: NSImageView!
@IBOutlet weak var myLabel: NSTextField!

override func viewDidLoad() {
    super.viewDidLoad()

    let area1 = myTrakingArea(control: self.myImage)
    let area2 = myTrakingArea(control: self.myLabel)
    self.myImage.addTrackingArea(area1)
    self.myLabel.addTrackingArea(area2)
}

func myTrakingArea(control: NSControl) -> NSTrackingArea {
    return NSTrackingArea.init(rect: control.bounds,
    options: [.mouseEnteredAndExited, .activeAlways],
    owner: control,
    userInfo: nil)
}

override func mouseEntered(with event: NSEvent) {
    if let owner = event.trackingArea?.owner as? NSControl {
        let id : String = owner.identifier!.rawValue

        switch id {
        case self.myLabel.identifier!.rawValue:
                print("Entered Quit Label")
        case self.myImage.identifier!.rawValue:
                print("Entered Quit Image")
            default:
                print("Entered ???")
        }
    }
}

override func mouseExited(with event: NSEvent) {
    if let owner = event.trackingArea?.owner as? NSControl {
        let id : String = owner.identifier!.rawValue

        switch id {
        case self.myLabel.identifier!.rawValue:
                print("Exited Quit Label")
        case self.myImage.identifier!.rawValue:
                print("Exited Quit Image")
            default:
                print("Exited ???")
        }
    }
}