Detect left and right mouse click on NSView

Question

In Swift: I created a simple NSView and now want to execute different functions, depending on which mouseButton is pressed (left or right). how can I detect this?

Trappist

Answer 1

You trap the corresponding mouseDown events

import Cocoa

class MyView : NSView {
    override func mouseDown(theEvent : NSEvent) {
        println("left mouse")
    }

    override func rightMouseDown(theEvent : NSEvent) {
        println("right mouse")
    }
}

See NSResponder for more magic.

Swift 4

import Cocoa

class MyView : NSView {
    override func mouseDown(with theEvent: NSEvent) {
        print("left mouse")
    }

    override func rightMouseDown(with theEvent: NSEvent) {
        print("right mouse")
    }
}

Passover

Thanks! But how can I adapt this custom class? Or is it overriding every NSView? I declared the NSView like let theView = NSView(). But I think I have to specify that my variable depends to the MyView? – Trappist

NSView by itself isn't that useful except as a container for other views. It's one of things you generally subclass to get the behaviour you need . In your case you are detecting left and right clicks and doing something with them. – Passover

Solved my problem and also... I learned a lot about subclassing. Thank you so much! – Trappist

Answer 2

Don't call super in MouseUp nor MouseDown. It solve my problem.

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