protected override void OnKeyDown(KeyEventArgs e) { SharpTreeViewItem container = e.OriginalSource as SharpTreeViewItem; switch (e.Key) { case Key.Left: if (container != null && ItemsControl.ItemsControlFromItemContainer(container) == this) { if (container.Node.IsExpanded) { container.Node.IsExpanded = false; } else if (container.Node.Parent != null) { this.FocusNode(container.Node.Parent); } e.Handled = true; } break; case Key.Right: if (container != null && ItemsControl.ItemsControlFromItemContainer(container) == this) { if (!container.Node.IsExpanded && container.Node.ShowExpander) { container.Node.IsExpanded = true; } else if (container.Node.Children.Count > 0) { // jump to first child: container.MoveFocus(new TraversalRequest(FocusNavigationDirection.Down)); } e.Handled = true; } break; case Key.Return: case Key.Space: if (container != null && Keyboard.Modifiers == ModifierKeys.None && this.SelectedItems.Count == 1 && this.SelectedItem == container.Node) { container.Node.ActivateItem(e); } break; case Key.Add: if (container != null && ItemsControl.ItemsControlFromItemContainer(container) == this) { container.Node.IsExpanded = true; e.Handled = true; } break; case Key.Subtract: if (container != null && ItemsControl.ItemsControlFromItemContainer(container) == this) { container.Node.IsExpanded = false; e.Handled = true; } break; case Key.Multiply: if (container != null && ItemsControl.ItemsControlFromItemContainer(container) == this) { container.Node.IsExpanded = true; ExpandRecursively(container.Node); e.Handled = true; } break; } if (!e.Handled) { base.OnKeyDown(e); } }
protected override void OnKeyDown(KeyEventArgs e) { SharpTreeViewItem container = e.OriginalSource as SharpTreeViewItem; switch (e.Key) { case Key.Left: if (container != null && ItemsControl.ItemsControlFromItemContainer(container) == this) { if (container.Node.IsExpanded) { container.Node.IsExpanded = false; } else if (container.Node.Parent != null) { this.FocusNode(container.Node.Parent); } e.Handled = true; } break; case Key.Right: if (container != null && ItemsControl.ItemsControlFromItemContainer(container) == this) { if (!container.Node.IsExpanded && container.Node.ShowExpander) { container.Node.IsExpanded = true; } else if (container.Node.Children.Count > 0) { // jump to first child: container.MoveFocus(new TraversalRequest(FocusNavigationDirection.Down)); } e.Handled = true; } break; case Key.Return: if (container != null && Keyboard.Modifiers == ModifierKeys.None && this.SelectedItems.Count == 1 && this.SelectedItem == container.Node) { e.Handled = true; container.Node.ActivateItem(e); } break; case Key.Space: if (container != null && Keyboard.Modifiers == ModifierKeys.None && this.SelectedItems.Count == 1 && this.SelectedItem == container.Node) { e.Handled = true; if (container.Node.IsCheckable) { if (container.Node.IsChecked == null) // If partially selected, we want to select everything { container.Node.IsChecked = true; } else { container.Node.IsChecked = !container.Node.IsChecked; } } else { container.Node.ActivateItem(e); } } break; case Key.Add: if (container != null && ItemsControl.ItemsControlFromItemContainer(container) == this) { container.Node.IsExpanded = true; e.Handled = true; } break; case Key.Subtract: if (container != null && ItemsControl.ItemsControlFromItemContainer(container) == this) { container.Node.IsExpanded = false; e.Handled = true; } break; case Key.Multiply: if (container != null && ItemsControl.ItemsControlFromItemContainer(container) == this) { container.Node.IsExpanded = true; ExpandRecursively(container.Node); e.Handled = true; } break; case Key.Back: if (IsTextSearchEnabled) { var instance = SharpTreeViewTextSearch.GetInstance(this); if (instance != null) { instance.RevertLastCharacter(); e.Handled = true; } } break; } if (!e.Handled) { base.OnKeyDown(e); } }