Catrobat.IDE.Core.ViewModels.Editor.Formula.ChangeVariableViewModel.ChangeVariableViewModel C# (CSharp) Method

        public ChangeVariableViewModel()
        {
            SaveCommand = new RelayCommand(SaveAction, SaveCommand_CanExecute);
            CancelCommand = new RelayCommand(CancelAction);

            Messenger.Default.Register<GenericMessage<Program>>(this,
                 ViewModelMessagingToken.CurrentProgramChangedListener, CurrentProgramChangedMessageAction);
            Messenger.Default.Register<GenericMessage<Sprite>>(this,
                ViewModelMessagingToken.CurrentSpriteChangedListener, SelectedSpriteChangedMessageAction);
            Messenger.Default.Register<GenericMessage<Variable>>(this,
                ViewModelMessagingToken.SelectedUserVariableChangedListener, SelectedUserVariableChangedMessageAction);
        }