A proper GUI pattern for Enable/Disable in Go Fyne

buttonPatternOnOff.go

// Go's Fyne GUI framework has some not-so-fine ways of making simple things more difficult than they should.
// The problem lies in the OnTapped events that are declared for widgets such as Buttons. These, unlike .NET
// have no way of determining the source/owner of the event because these functions have no parameters to 
// acomplish that.
//   As a use case, imagine a Go Fyne form with Enable & Disable buttons that operate on other widgets. How
// would you go about disabling the button once it has been tapped (proper GUI behavior)?

// 1. Declare the Button instances. Chicken & Egg problem, at this point we don't have an object instance to
//    use in the OnTapped callback to reconfigure the buttons.
btnDisable := widget.NewButton("Disable", nil)
btnEnable := widget.NewButton("Enable", nil)
btnEnable.Disable()	// by default the form is enabled

// 2. Declare OnTapped callback for disabling/enabling the slave widgets and reconfigure both buttons
var disableCB = func() {
				intSpinner.Disable()
				fintSpinner.Disable()
				dintSpinner.Disable()
				fdintSpinner.Disable()
        
				btnDisable.Disable()  // no point in leaving it enabled when it is now a NOOP
				btnEnable.Enable()    // but user should now be able to Enable
			}
var enableCB = func() {
			intSpinner.Enable()
			fintSpinner.Enable()
			dintSpinner.Enable()
			fdintSpinner.Enable()
      
			btnEnable.Disable()
			btnDisable.Enable()
		}
    
// 3. Now attach the callbacks
btnDisable.OnTapped = disableCB
btnEnable.OnTapped = enableCB