void AddBorderAdorner(FrameworkElement adornedElement)
{
if (adornedElement != null)
{
AdornerLayer layr = AdornerLayer.GetAdornerLayer(adornedElement);
if (layr != null)
{
BorderAdorner adr = new BorderAdorner(adornedElement);
adr.ToolTip = adornedElement.ToolTip;
adr.ContextMenu = adornedElement.ContextMenu;
layr.Add(adr);
SetDragging(adr);
}
}
}
void DragHelper_PreviewDragStarted(object sender, DragStartedEventArgs e)
{
SpaceObject s = e.DragObject as SpaceObject;
if (s != null && s.Tag != null)
{
canvas.Children.Remove(s);
}
else
{
BorderAdorner badr = e.DragObject as BorderAdorner;
if (badr != null)
{
canvas.Children.Remove(SelectedSpaceObject);
}
}
}
void RemoveBorderAdorner(UIElement adornedElement)
{
if (adornedElement != null)
{
AdornerLayer layr = AdornerLayer.GetAdornerLayer(adornedElement);
if (layr != null)
{
Adorner[] adorners = layr.GetAdorners(adornedElement);
if (adorners != null)
{
foreach (Adorner adr in adorners)
{
BorderAdorner badr = adr as BorderAdorner;
if (badr != null)
{
layr.Remove(badr);
badr.DisposeDragging();
}
}
}
}
}
}