protected override void OnKeyDown(KeyEventArgs e)
{
try
{
MultiSelectionTreeViewItem 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)
{
int curentNodeIndex = this.ParentItemsControl.ItemContainerGenerator.IndexFromContainer(this);
if (curentNodeIndex == 0)
{
itemToSelect = this.ParentTreeViewItem;
}
else
{
MultiSelectionTreeViewItem temp = null;
temp = GetPreviousNodeAtSameLevel(this);
itemToSelect = GetLastVisibleChildNodeOf(temp);
}
}
else if (e.Key == Key.Down)
{
if (this.IsExpanded && this.Items.Count > 0)
{
itemToSelect = this.ItemContainerGenerator.ContainerFromIndex(0) as MultiSelectionTreeViewItem;
}
else
{
itemToSelect = GetNexNodeAtSameLevel(this);
if (itemToSelect == null)
{
MultiSelectionTreeViewItem temp = this.ParentTreeViewItem;
while (itemToSelect == null && temp != null)
{
itemToSelect = GetNexNodeAtSameLevel(temp);
temp = temp.ParentTreeViewItem;
}
}
}
}
if (itemToSelect != null)
{
itemToSelect.Focus();
itemToSelect.IsSelected = true;
//TODO:Treeview逻辑
ParentTreeView.OnViewItemMouseDown(itemToSelect);
}
}
catch (Exception)
{
e.Handled = true;
}
}
protected override void OnMouseDown(System.Windows.Input.MouseButtonEventArgs e)
{
if (ParentTreeView == null)
{
return;
}
if (e.LeftButton == MouseButtonState.Released && e.RightButton == MouseButtonState.Pressed)
{
return;
}
if (IsSelected == true)
{
IsSelected = false;
}
else if (IsSelected == false)
{
IsSelected = true;
}
else
{
IsSelected = false;
}
//TODO:逻辑父级需要做的逻辑
ParentTreeView.OnViewItemMouseDown(this);
}
