public void SelectItem(DrawingItem item)
 {
     propertyGrid1.SelectedObject = item;
     VPLUtil.AdjustImagePropertyAttribute(item);
     if (item != null)
     {
         Text = "Drawing item: " + item.Name;
     }
     else
     {
         Text = "Drawing item:";
     }
     propertyGrid1.Refresh();
 }