private ISupportDrop HitTestElementTree(ComponentThemableElementTree elementTree, Point screenMouse, out Point resultDropLocation)
{
if (elementTree == null)
{
resultDropLocation = Point.Empty;
return(null);
}
resultDropLocation = Point.Empty;
Point clientMouse = elementTree.Control.PointToClient(screenMouse);
RadElement hitElement = elementTree.GetElementAtPoint(clientMouse);
ISupportDrag dragInstance = this.Context as ISupportDrag;
ISupportDrop dropTarget = null;
ISupportDrop hitTarget = null;
while (hitElement != null)
{
hitTarget = hitElement as ISupportDrop;
dropTarget = null;
if (hitTarget != null && hitTarget.AllowDrop)
{
RadElement dropTargetElement = hitTarget as RadElement;
if (dropTargetElement != null)
{
resultDropLocation = dropTargetElement.PointFromControl(clientMouse);
}
else
{
resultDropLocation = clientMouse;
}
dropTarget = hitTarget;
}
//raise PreviewDropTarget event
PreviewDropTargetEventArgs args = new PreviewDropTargetEventArgs(dragInstance, hitTarget);
args.DropTarget = dropTarget;
this.OnPreviewDropTarget(args);
dropTarget = args.DropTarget;
if (dropTarget != null)
{
return(dropTarget);
}
hitElement = hitElement.Parent;
}
return(null);
}
public virtual bool OnMouseUp(MouseEventArgs e)
{
if (!this.enable || this.DisableMouseEvents)
{
return(false);
}
if (this.OwnerControl.Capture && this.ItemCapture != null)
{
this.ItemCapture.CallDoMouseUp(e);
}
else if (this.selectedElement != null)
{
this.selectedElement.CallDoMouseUp(e);
}
else if (this.Owner != null)
{
ComponentThemableElementTree elementTree = this.Owner.ElementTree;
elementTree.GetElementAtPoint((RadElement)elementTree.RootElement, e.Location, (List <RadElement>)null)?.CallDoMouseUp(e);
}
return(false);
}
private ISupportDrop HitTestElementTree(
ComponentThemableElementTree elementTree,
Point screenMouse,
out Point resultDropLocation)
{
if (elementTree == null)
{
resultDropLocation = Point.Empty;
return((ISupportDrop)null);
}
resultDropLocation = Point.Empty;
Point client = elementTree.Control.PointToClient(screenMouse);
RadElement radElement1 = elementTree.GetElementAtPoint(client);
ISupportDrag context = this.Context as ISupportDrag;
for (; radElement1 != null; radElement1 = radElement1.Parent)
{
ISupportDrop hitTarget = radElement1 as ISupportDrop;
ISupportDrop supportDrop = (ISupportDrop)null;
if (hitTarget != null && hitTarget.AllowDrop)
{
RadElement radElement2 = hitTarget as RadElement;
resultDropLocation = radElement2 == null ? client : radElement2.PointFromControl(client);
supportDrop = hitTarget;
}
PreviewDropTargetEventArgs e = new PreviewDropTargetEventArgs(context, hitTarget);
e.DropTarget = supportDrop;
this.OnPreviewDropTarget(e);
ISupportDrop dropTarget = e.DropTarget;
if (dropTarget != null)
{
return(dropTarget);
}
}
return((ISupportDrop)null);
}
