private void ItemDragService_PreviewDropTarget(object sender, PreviewDropTargetEventArgs e)
{
RadDragDropService service = sender as RadDragDropService;
RadPageViewItem item = e.DropTarget as RadPageViewItem;
if (item != null)
{
ShowEventMessage(item.Text, "ItemDragService.PreviewDropTarget");
}
}
protected override void OnPreviewDropTarget(PreviewDropTargetEventArgs e)
{
base.OnPreviewDropTarget(e);
TemplateGroupsElement dropTarget = e.DropTarget as TemplateGroupsElement;
if (dropTarget == null || dropTarget.CanDragOver(e.DragInstance))
{
return;
}
GroupFieldElement dragInstance = e.DragInstance as GroupFieldElement;
if (dragInstance != null)
{
e.DropTarget = (ISupportDrop)dragInstance.TemplateElement;
}
else
{
e.DropTarget = (ISupportDrop)dropTarget.GroupPanelElement;
}
}
