ctrlutil.go
func ActivateControl(parent, control Control) bool {
	DeactivateControls(parent)
	res := false
	ctrl := FindChild(parent, control)
	if ctrl != nil {
		res = true
		if !ctrl.Active() {
			ctrl.ProcessEvent(Event{Type: EventActivate, X: 1})
			ctrl.SetActive(true)
		}
	}

	return res
}
func ActivateControl(parent, control Control) bool {
	DeactivateControls(parent)
	res := false
	ctrl := FindChild(parent, control)
	if ctrl != nil {
		res = true
		if !ctrl.Active() {
			ctrl.ProcessEvent(Event{Type: EventActivate, X: 1})
			ctrl.SetActive(true)
		}
	}

	return res
}
// ActivateControl makes control active and disables all other children of
// the parent. Returns true if control was found and activated