selectText of NSTextField on focus

Question

Could anybody suggest a method to select all the text of an NSTextField when the user clicks it?

I did find suggestions to subclass NSTextField

Answer 1

I like Konstantin's solution, but that one will select on every mouse down. Here's a variation I'm using to select in mouseDown method, but only if it just became the first responder:

class SelectingTextField: NSTextField {

    var wantsSelectAll = false

    override func becomeFirstResponder() -> Bool {
        wantsSelectAll = true

        return super.becomeFirstResponder()
    }

    override func mouseDown(with event: NSEvent) {
        super.mouseDown(with: event)

        if wantsSelectAll {
            selectText(self)
            wantsSelectAll = false
        }
    }
}