internal DragSourceManagerBase(UIElement draggedElement, AdornerLayer adornerLayer, UIElement container, bool enableAutoScroll, bool showGhost)
{
if (draggedElement == null)
{
throw new ArgumentNullException("draggedElement");
}
if (container == null)
{
throw new ArgumentNullException("container");
}
m_draggedElement = draggedElement;
m_container = container;
m_adornerLayer = (adornerLayer != null) ? adornerLayer : AdornerLayer.GetAdornerLayer(container);
m_showGhost = showGhost;
if (enableAutoScroll)
{
var scrollViewer = DragSourceManagerBase.GetScrollViewer(draggedElement);
if (scrollViewer != null)
{
m_autoScrollManager = new AutoScrollManager(scrollViewer);
}
}
}
public DragSourceManager(UIElement draggedElement, AdornerLayer adornerLayerInsideDragContainer, UIElement dragContainer, bool enableAutoScroll, bool showDraggedElementGhost)
{
if (draggedElement == null)
{
throw new ArgumentNullException("draggedElement");
}
if (dragContainer == null)
{
throw new ArgumentNullException("dragContainer");
}
this.SetDraggedElement(draggedElement);
this.DragContainer = dragContainer;
this.ShowDraggedElementGhost = showDraggedElementGhost;
// If the AdornerLayer was not provided to the DragSourceManager
if (adornerLayerInsideDragContainer == null)
{
// Get the first AdornerLayer up the VisualTree of the dragContainer
this.AdornerLayerInsideDragContainer = AdornerLayer.GetAdornerLayer(this.DragContainer);
}
else
{
this.AdornerLayerInsideDragContainer = adornerLayerInsideDragContainer;
}
if (enableAutoScroll)
{
DependencyObject element = draggedElement;
ScrollViewer scrollViewer = null;
while (element != null)
{
element = VisualTreeHelper.GetParent(element);
scrollViewer = element as ScrollViewer;
if (scrollViewer != null)
{
break;
}
}
if (scrollViewer != null)
{
m_autoScrollManager = new AutoScrollManager(scrollViewer);
}
}
}
public DragSourceManager( UIElement draggedElement, AdornerLayer adornerLayerInsideDragContainer, UIElement dragContainer, bool enableAutoScroll, bool showDraggedElementGhost )
{
if( draggedElement == null )
throw new ArgumentNullException( "draggedElement" );
if( dragContainer == null )
throw new ArgumentNullException( "dragContainer" );
this.SetDraggedElement( draggedElement );
this.DragContainer = dragContainer;
this.ShowDraggedElementGhost = showDraggedElementGhost;
// If the AdornerLayer was not provided to the DragSourceManager
if( adornerLayerInsideDragContainer == null )
{
// Get the first AdornerLayer up the VisualTree of the dragContainer
this.AdornerLayerInsideDragContainer = AdornerLayer.GetAdornerLayer( this.DragContainer );
}
else
{
this.AdornerLayerInsideDragContainer = adornerLayerInsideDragContainer;
}
if( enableAutoScroll )
{
DependencyObject element = draggedElement;
ScrollViewer scrollViewer = null;
while( element != null )
{
element = VisualTreeHelper.GetParent( element );
scrollViewer = element as ScrollViewer;
if( scrollViewer != null )
break;
}
if( scrollViewer != null )
{
m_autoScrollManager = new AutoScrollManager( scrollViewer );
}
}
}
