Catrobat.IDE.WindowsPhone.Controls.FormulaControls.FormulaKeyboard.ListBox_OnSelectionChanged C# (CSharp) Метод

        private void ListBox_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            var source = (Selector)sender;
            if (source.SelectedItem == null) return;
            //_viewModel.IsAddLocalVariableButtonVisible = false;
            //_viewModel.IsAddGlobalVariableButtonVisible = false;
            ShowMain();
            var data = (FormulaKey)source.SelectedItem;

            if (!CheckSensorKeys(data))
            {
                return;
            }

            RaiseKeyPressed(data);
            _viewModel.KeyPressedCommand.Execute(data);
            source.SelectedItem = null;
        }