public void Select(bool select)
{
if (SelectionModel != null)
{
var indexPath = GetIndexPath();
if (select)
{
SelectionModel.SelectAt(indexPath);
}
else
{
SelectionModel.DeselectAt(indexPath);
}
}
}
protected override void OnKeyUp(KeyEventArgs e)
{
var indexPath = GetIndexPath();
Debug.WriteLine("OnKeyUp:" + indexPath.ToString());
if (SelectionModel != null)
{
if (e.Key == Key.Escape)
{
SelectionModel.ClearSelection();
}
else if (e.Key == Key.Space)
{
SelectionModel.SelectAt(indexPath);
}
else if (!SelectionModel.SingleSelect)
{
var isShiftPressed = Keyboard.Modifiers.HasFlag(ModifierKeys.Shift);
var isCtrlPressed = Keyboard.Modifiers.HasFlag(ModifierKeys.Control);
if (e.Key == Key.A && isCtrlPressed)
{
SelectionModel.SelectAll();
}
else if (isCtrlPressed && e.Key == Key.Space)
{
if (SelectionModel.IsSelectedAt(indexPath).Value)
{
SelectionModel.DeselectAt(indexPath);
}
else
{
SelectionModel.SelectAt(indexPath);
}
}
else if (isShiftPressed)
{
SelectionModel.SelectRangeFromAnchorTo(GetIndexPath());
}
}
}
base.OnKeyUp(e);
}
public PageViewModel()
{
Node root = new Node();
Items = root.Children;
Selection = new SelectionModel();
AddItemCommand = ReactiveCommand.Create(() =>
{
Node parentItem = Selection.SelectedItems.Count > 0 ?
(Node)Selection.SelectedItems[0] : root;
parentItem.AddNewItem();
});
RemoveItemCommand = ReactiveCommand.Create(() =>
{
while (Selection.SelectedItems.Count > 0)
{
Node lastItem = (Node)Selection.SelectedItems[0];
RecursiveRemove(Items, lastItem);
Selection.DeselectAt(Selection.SelectedIndices[0]);
}
bool RecursiveRemove(ObservableCollection <Node> items, Node selectedItem)
{
if (items.Remove(selectedItem))
{
return(true);
}
foreach (Node item in items)
{
if (item.AreChildrenInitialized && RecursiveRemove(item.Children, selectedItem))
{
return(true);
}
}
return(false);
}
});
}