Miscellany

		private void OnTreeEvent (object sender, WidgetEventArgs args) 
		{
			// probs:
			// - only works when moving from tree row to tree row..
			//   not from other widget to tree row	
			// - hiding due to leavenotify only works first time
			//   because "we never get to enter again?"
			// - it crashes when moving over my gizmo contact
			
			if (args.Event.Type == Gdk.EventType.MotionNotify) 
			{
				Gdk.EventMotion ev = (Gdk.EventMotion) args.Event;
				
				TreePath old_over_path = over_path;
				
				buddy_tree.GetPathAtPos ((int) ev.X, (int) ev.Y, out over_path);
				
				TreeIter iter;
				buddy_tree.Model.GetIter (out iter, over_path);	
				
				// The iters are first legal after the treeview has been build
				if (over_path.Compare (old_over_path) != 0 && iter.Stamp != 0)
				{
					popup.Hide ();
					Buddy info = (Buddy) buddy_tree.Model.GetValue (iter, COL_BUDDY);
				
					if (info != null)
					{
						if (info.Name != null)
						{
							popup.DisplayLabel = info.Name;
							popup.StatusLabel = "Available";
					
							if (info.VCard.Photo != null)
							{
								popup.Avatar = info.VCard.Photo;
							} else {
								popup.Avatar = GtkUtil.LoadPixbuf ("default-user.png");
							}
							
							Gdk.Rectangle rec = buddy_tree.GetCellArea(over_path, col_expander);
							
							int x_value;
							int y_value;
							
							int popup_size = 300;
							int offset = 12;
							
							buddy_tree.ParentWindow.GetPosition(out x_value, out y_value);
							
							buddy_tree.GdkWindow.GetOrigin(out x_value, out y_value);
													
							if (x_value + rec.Right - offset + popup_size < Gdk.Screen.Default.Width)
							{
								popup.Move(x_value + rec.Right - offset, y_value + rec.Top);
							} else {
								popup.Move(x_value - popup_size - offset, y_value + rec.Top);
							}
							
							popup.Show ();
						}
					}
				}
			}