protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
{
if (ParentMultipleSelectionTreeView == null)
{
return;
}
/*
* if (ParentMultipleSelectionTreeView.SelectionMode == SelectionModalities.KeyboardModifiersMode)
* {
* if (!Keyboard.IsKeyDown(Key.LeftCtrl) && !Keyboard.IsKeyDown(Key.RightCtrl))
* return;
* }
*/
if (!this.IsSelected)
{
this.IsSelected = true;
}
else
{
this.IsSelected = false;
}
ParentMultipleSelectionTreeView.OnViewItemMouseDown(this);
//prevent parent node from being selected
e.Handled = true;
}
/// <summary>
/// Recursively select all children.
/// </summary>
public void SelectAllExpandedChildren()
{
if (Items != null && Items.Count > 0)
{
if (this.IsExpanded)
{
foreach (var item in Items)
{
if (item is MSTreeViewItem)
{
((MSTreeViewItem)item).SelectAllExpandedChildren();
}
else
{
MSTreeViewItem tvItem = this.ItemContainerGenerator.ContainerFromItem(item) as MSTreeViewItem;
if (tvItem != null)
{
tvItem.SelectAllExpandedChildren();
}
}
}
}
}
if (!this.IsSelected)
{
this.IsSelected = true;
ParentMultipleSelectionTreeView.OnSelectionChanges(this);
}
}
public void Select()
{
this.IsSelected = true;
ParentMultipleSelectionTreeView.OnSelectionChanges(this);
}
protected override void OnKeyDown(KeyEventArgs e)
{
try
{
MSTreeViewItem itemToSelect = null;
if (e.Key == Key.Left)
{
this.IsExpanded = false;
}
else if (e.Key == Key.Right)
{
this.IsExpanded = true;
}
else if (e.Key == Key.Up)
{
// In this case we need to select the last child of the last expandend node of
// - the previous at the same level (if this index node is NOT 0)
// - the parent node (if this index node is 0)
int currentNodeIndex = this.ParentItemsControl.ItemContainerGenerator.IndexFromContainer(this);
if (currentNodeIndex == 0)
{
itemToSelect = this.ParentMultipleSelectionTreeViewItem;
}
else
{
MSTreeViewItem tmp = null;
tmp = GetPreviousNodeAtSameLevel(this);
itemToSelect = GetLastVisibleChildNodeOf(tmp);
}
}
else if (e.Key == Key.Down)
{
// In this case we need to select:
// - the first child node (if this node is expanded)
// - the next at the same level (if this not the last child)
// - the next at the same level of the parent node (if this is the last child)
if (this.IsExpanded && this.Items.Count > 0)
{ // Select first Child
itemToSelect = this.ItemContainerGenerator.ContainerFromIndex(0) as MSTreeViewItem;
}
else
{
itemToSelect = GetNextNodeAtSameLevel(this);
if (itemToSelect == null) // current node has no subsequent node at the same level
{
MSTreeViewItem tmp = this.ParentMultipleSelectionTreeViewItem;
while (itemToSelect == null && tmp != null) // searhing for the first parent that has a subsequent node at the same level
{
itemToSelect = GetNextNodeAtSameLevel(tmp);
tmp = tmp.ParentMultipleSelectionTreeViewItem;
}
}
}
}
if (itemToSelect != null)
{
itemToSelect.Focus();
itemToSelect.IsSelected = true;
ParentMultipleSelectionTreeView.OnViewItemMouseDown(itemToSelect);
}
}
catch (Exception) { /* Silently ignore */ }
// Don't bubble up the event. (I'm sure you know difference between Bubble and Tunnel events in WPF...)
e.Handled = true;
}
