protected override void OnPreviewKeyDown(KeyEventArgs e)
{
base.OnPreviewKeyDown(e);
DataGridCell senderCell = e.OriginalSource as DataGridCell;
bool ctrlDown = Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl);
if (e.Key == Key.Return)
{
if (senderCell != null && !senderCell.IsEditing)
{
// Enter edit mode if current cell is not in edit mode
senderCell.Focus();
this.BeginEdit();
e.Handled = true;
}
}
else if (e.Key == Key.Space)
{
if (senderCell != null && !senderCell.IsEditing)
{
object item = senderCell.DataContext;
// In some cases senderCell is not selected. This can happen after multi selection over all items.
if (!senderCell.IsSelected)
{
item = SelectedItem; // simply use first selected item
}
ToggleEnabledForItem(item);
e.Handled = true;
}
}
else if (ctrlDown && e.Key == Key.Up)
{
if (MoveUpCommand != null && MoveUpCommand.CanExecute(null))
{
var focusedCellItem = (Keyboard.FocusedElement as DataGridCell)?.DataContext;
MoveUpCommand.Execute(null);
// DataGrid loses keyboard focus after moving items
FocusCellAfterDelay(focusedCellItem);
}
e.Handled = true;
}
else if (ctrlDown && e.Key == Key.Down)
{
if (MoveDownCommand != null && MoveDownCommand.CanExecute(null))
{
var focusedCellItem = (Keyboard.FocusedElement as DataGridCell)?.DataContext;
MoveDownCommand.Execute(null);
// DataGrid loses keyboard focus after moving items
FocusCellAfterDelay(focusedCellItem);
}
e.Handled = true;
}
}
/// <summary>
/// Updates operation collection.
/// </summary>
private void UpdateOperations()
{
this.contextMenuOperations = new Collection <MenuItemViewModel>();
if (this.SelectedItems.Count == 1)
{
SerializedDomainClassViewModel classViewModel = this.SelectedItems[0] as SerializedDomainClassViewModel;
if (classViewModel != null)
{
if (classViewModel.Parent != null)
{
MenuItemViewModel mv = new MenuItemViewModel(this.ViewModelStore, "Select Relationship");
mv.Command = SelectRelationshipCommand;
this.contextMenuOperations.Add(mv);
}
}
SerializedReferenceRelationshipViewModel refRelViewModel = this.SelectedItems[0] as SerializedReferenceRelationshipViewModel;
if (refRelViewModel != null)
{
if (!refRelViewModel.IsInFullSerialization)
{
MenuItemViewModel mv = new MenuItemViewModel(this.ViewModelStore, "Select Relationship");
mv.Command = SelectRelationshipCommand;
this.contextMenuOperations.Add(mv);
}
}
}
if (this.SelectedItems.Count > 0)
{
AddSeparator();
MenuItemViewModel mvMoveUp = new MenuItemViewModel(this.ViewModelStore, "Move up", "pack://application:,,,/Tum.PDE.LanguageDSL.Visualization;component/Resources/Images/Up-16.png");
mvMoveUp.Command = MoveUpCommand;
if (!MoveUpCommand.CanExecute())
{
mvMoveUp.IsEnabled = false;
}
this.contextMenuOperations.Add(mvMoveUp);
MenuItemViewModel mvMoveDown = new MenuItemViewModel(this.ViewModelStore, "Move down", "pack://application:,,,/Tum.PDE.LanguageDSL.Visualization;component/Resources/Images/Down-16.png");
mvMoveDown.Command = MoveDownCommand;
if (!MoveDownCommand.CanExecute())
{
mvMoveDown.IsEnabled = false;
}
this.contextMenuOperations.Add(mvMoveDown);
}
OnPropertyChanged("Operations");
}