protected override void OnPreviewMouseRightButtonDown(MouseButtonEventArgs e)//右击显示图元类型
{
base.OnPreviewMouseRightButtonDown(e);
DesignerContainer item = e.Source as DesignerContainer;
if (item != null)
{
DesignerItem o = item.Content as DesignerItem;
o._controlID = item.ID;
o.ShowWindow();
}
}
