/// <summary>
/// Starts moving the mouse in the grid mode, in the specified
/// direction
/// </summary>
/// <param name="direction">down or up</param>
private void startGridSweep(GridMouseMover.Direction direction)
{
pause();
_gridMouseMover = createGridMouseMover();
AuditLog.Audit(new AuditEventMouseMover(direction.ToString()));
_gridMouseMover.GridRectangleDirection = direction;
_gridMouseMover.Start();
_gridMouseMover = null;
resume();
}
