private void menuNew_Click(object sender, RoutedEventArgs e) { DrawArea.NewMeg(); btnUndo.IsEnabled = false; btnRedo.IsEnabled = false; btnRotateRight.IsEnabled = false; btnRotateLeft.IsEnabled = false; menuSave.IsEnabled = false; menuSaveAs.IsEnabled = false; menuDelete.IsEnabled = false; menuDeleteAll.IsEnabled = false; menuMoveToFront.IsEnabled = false; menuMoveToBack.IsEnabled = false; menuSelectAll.IsEnabled = false; menuResetRotate.IsEnabled = false; btnRotateRight.IsEnabled = false; btnRotateLeft.IsEnabled = false; txtRotate.IsEnabled = false; }