public DirectoryTree2()
{
#region ContextMenu
this.AddHandler(TreeViewItem.MouseRightButtonUpEvent, new MouseButtonEventHandler(
(MouseButtonEventHandler) delegate(object sender, MouseButtonEventArgs args)
{
TreeViewItem sourceItem = UITools.GetParentTreeViewItem(args.OriginalSource as FrameworkElement);
if (sourceItem != null)
{
if (!sourceItem.IsSelected)
{
TreeViewItemAutomationPeer peer = new TreeViewItemAutomationPeer(sourceItem);
ISelectionItemProvider invokeProv = peer.GetPattern(PatternInterface.SelectionItem) as ISelectionItemProvider;
invokeProv.Select();
}
if (sourceItem.IsSelected)
{
if (ContextMenuCommand != null && ContextMenuCommand.CanExecute(this.SelectedItem))
{
ContextMenuCommand.Execute(this.SelectedItem);
}
}
}
}));
#endregion
W7TreeViewItemUtils.SetIsEnabled(this, true);
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
SelectionHelper.SetEnableSelection(this, true);
UpdateCollumnHeader();
#region Update scroll position if scroll bar disappear
ScrollViewer scrollView = UITools.FindVisualChild <ScrollViewer>(this);
DependencyPropertyDescriptor vertScrollbarVisibilityDescriptor =
DependencyPropertyDescriptor.FromProperty(
ScrollViewer.ComputedVerticalScrollBarVisibilityProperty, typeof(ScrollViewer));
vertScrollbarVisibilityDescriptor.AddValueChanged
(scrollView, delegate
{
if (scrollView.ComputedHorizontalScrollBarVisibility == System.Windows.Visibility.Collapsed)
{
VirtualizingPanel panel = UITools.FindVisualChild <VirtualizingPanel>(this);
if (panel is IScrollInfo)
{
(panel as IScrollInfo).SetVerticalOffset(0);
}
}
});
DependencyPropertyDescriptor horzScrollbarVisibilityDescriptor =
DependencyPropertyDescriptor.FromProperty(
ScrollViewer.ComputedHorizontalScrollBarVisibilityProperty, typeof(ScrollViewer));
horzScrollbarVisibilityDescriptor.AddValueChanged
(scrollView, delegate
{
if (scrollView.ComputedHorizontalScrollBarVisibility == System.Windows.Visibility.Collapsed)
{
VirtualizingPanel panel = UITools.FindVisualChild <VirtualizingPanel>(this);
if (panel is IScrollInfo)
{
(panel as IScrollInfo).SetHorizontalOffset(0);
}
}
});
#endregion
#region ContextMenu
Point mouseDownPt = new Point(-100, -100);
this.AddHandler(TreeViewItem.PreviewMouseRightButtonDownEvent, new MouseButtonEventHandler(
(MouseButtonEventHandler) delegate(object sender, MouseButtonEventArgs args)
{
mouseDownPt = args.GetPosition(this);
}));
this.AddHandler(TreeViewItem.MouseRightButtonUpEvent, new MouseButtonEventHandler(
(MouseButtonEventHandler) delegate(object sender, MouseButtonEventArgs args)
{
Point mouseUpPt = args.GetPosition(this);
if ((Math.Abs(mouseDownPt.X - mouseUpPt.X) < 5) &&
(Math.Abs(mouseDownPt.Y - mouseUpPt.Y) < 5))
{
args.Handled = true;
if (ContextMenuCommand != null && ContextMenuCommand.CanExecute(this.DataContext))
{
if (SelectedValue != null)
{
ContextMenuCommand.Execute(this.DataContext);
}
}
}
}));
#endregion
//Memory Leak
//Unloaded += (o, e) =>
//{
// SelectionHelper.SetEnableSelection(o as FileList2, false);
// (o as FileList2).View = null;
//};
}
