/// <summary>
/// Starts drag-and-drop auto-scroll in the Down direction.
/// </summary>
private void StartDragDropAutoScrollDown()
{
// Initialize drag-and-drop auto-scroll.
InitializeDragDropAutoScroll();
// Set the drag-and-drop auto-scroll mode.
dragDropAutoScrollMode = DragDropAutoScrollMode.Down;
// Set the drag-and-drop auto-scroll rectangle.
dragDropAutoScrollRectangle = BottomDragDropAutoScrollRectangle;
// Raise the DragDropAutoScrollBegin event.
OnDragDropAutoScrollBegin(EventArgs.Empty);
// Start the drag-and-drop auto-scroll timer.
dragDropAutoScrollTimer.Start();
}
/// <summary>
/// Stops drag-and-drop auto-scroll.
/// </summary>
private void StopDragDropAutoScroll()
{
if (dragDropAutoScrollMode != DragDropAutoScrollMode.Off)
{
// Stop the drag-and-drop auto-scroll timer.
dragDropAutoScrollTimer.Stop();
// Set the drag-and-drop auto-scroll mode to Off.
dragDropAutoScrollMode = DragDropAutoScrollMode.Off;
// Raise the DragDropAutoScrollEnd event.
OnDragDropAutoScrollEnd(EventArgs.Empty);
}
}
/// <summary>
/// Starts drag-and-drop auto-scroll in the Up direction.
/// </summary>
private void StartDragDropAutoScrollUp()
{
// Initialize drag-and-drop auto-scroll.
InitializeDragDropAutoScroll();
// Set the drag-and-drop auto-scroll mode.
dragDropAutoScrollMode = DragDropAutoScrollMode.Up;
// Set the drag-and-drop auto-scroll rectangle.
dragDropAutoScrollRectangle = TopDragDropAutoScrollRectangle;
// Start the drag-and-drop auto-scroll timer.
dragDropAutoScrollTimer.Start();
}