public static IDragDropOperation GetRunningOperation(DependencyObject element)
{
IDragDropOperation operation = null;
if (element != null)
{
operation = element.GetValue(DragDrop.dragDropOperationProperty) as IDragDropOperation;
}
return(operation);
}
private static void RemoveOperation(IDragDropOperation dragDropOperation)
{
(dragDropOperation.Source as DependencyObject).ClearValue(DragDrop.dragDropOperationProperty);
}
// exposed for testing
internal static void AddOperation(IDragDropOperation dragDropOperation)
{
(dragDropOperation.Source as DependencyObject).SetValue(DragDrop.dragDropOperationProperty, dragDropOperation);
}
internal static void OnOperationFinished(IDragDropOperation dragDropOperation)
{
RemoveOperation(dragDropOperation);
}
public DragCompleteContext(object data, IDragDropOperation owner, bool dragSuccessful)
: base(data, owner)
{
this.DragSuccessful = dragSuccessful;
}
public DragContext(object data, IDragDropOperation owner)
{
this.PayloadData = data;
this.owner = owner;
}
