public static void Detach(ResizingAdorner adorner)
{
Argument.IsNotNull(() => adorner);
var adornerLayer = AdornerLayer.GetAdornerLayer(adorner.AdornedElement);
if (adornerLayer == null)
{
return;
}
adornerLayer.Remove(adorner);
adorner._visualChildren.Clear();
if (adorner.AdornedElement is FrameworkElement fxElement)
{
fxElement.Loaded -= adorner.OnAdornedElementLoaded;
}
adorner._left.DragDelta -= adorner.HandleLeft;
adorner._topLeft.DragDelta -= adorner.HandleTopLeft;
adorner._top.DragDelta -= adorner.HandleTop;
adorner._topRight.DragDelta -= adorner.HandleTopRight;
adorner._right.DragDelta -= adorner.HandleRight;
adorner._bottomRight.DragDelta -= adorner.HandleBottomRight;
adorner._bottom.DragDelta -= adorner.HandleBottom;
adorner._bottomLeft.DragDelta -= adorner.HandleBottomLeft;
}
private void RemoveAdorner()
{
if (_adorner is null || _adornerLayer is null)
{
return;
}
if (_adornerDragDrop != null)
{
ControlAdornerDragDrop.Detach(_adornerDragDrop);
_adornerDragDrop = null;
}
if (_adornerResizing != null)
{
ResizingAdorner.Detach(_adornerResizing);
_adornerResizing = null;
}
_adornerLayer.Remove(_adorner);
_adorner.Child = null;
_adorner = null;
_adornerLayer = null;
RegisterBeingMovedOut();
}
public static ResizingAdorner Attach(FrameworkElement element)
{
Argument.IsNotNull(() => element);
var adorner = new ResizingAdorner(element);
if (adorner.AdornedElement is FrameworkElement fxElement)
{
fxElement.Loaded += adorner.OnAdornedElementLoaded;
}
adorner._left.DragDelta += adorner.HandleLeft;
adorner._topLeft.DragDelta += adorner.HandleTopLeft;
adorner._top.DragDelta += adorner.HandleTop;
adorner._topRight.DragDelta += adorner.HandleTopRight;
adorner._right.DragDelta += adorner.HandleRight;
adorner._bottomRight.DragDelta += adorner.HandleBottomRight;
adorner._bottom.DragDelta += adorner.HandleBottom;
adorner._bottomLeft.DragDelta += adorner.HandleBottomLeft;
var adornerLayer = AdornerLayer.GetAdornerLayer(element);
adornerLayer.Add(adorner);
adorner.UpdateState();
return(adorner);
}
private void UpdateResizingAdorner()
{
if (IsOpen && (ResizeMode == ResizeMode.CanResize || ResizeMode == ResizeMode.CanResizeWithGrip))
{
if (_adornerResizing == null && _adorner != null)
{
_adornerResizing = ResizingAdorner.Attach(this);
}
}
else
{
if (_adornerResizing != null)
{
ResizingAdorner.Detach(_adornerResizing);
_adornerResizing = null;
}
}
}