protected override void OnDragStart(MouseEventArgs args)
{
base.OnDragStart(args);
_dragging = true;
_rectangleDrag = new RectangleDrag();
_bounds = Control.Bounds;
using (DesktopGraphics graphics = new DesktopGraphics())
{
_rectangleDrag.Start(GetScreenRectangle(_bounds), graphics);
}
_flags = GetDirectionFlags(GetDragDirection(args.Location));
}
private DragDirectionFlags GetDirectionFlags(DragDirection direction)
{
DragDirectionFlags flags = DragDirectionFlags.None;
switch (direction)
{
case DragDirection.None:
break;
case DragDirection.NorthWest:
flags = DragDirectionFlags.North | DragDirectionFlags.West;
break;
case DragDirection.North:
flags = DragDirectionFlags.North;
break;
case DragDirection.NorthEast:
flags = DragDirectionFlags.North | DragDirectionFlags.East;
break;
case DragDirection.East:
flags = DragDirectionFlags.East;
break;
case DragDirection.SouthEast:
flags = DragDirectionFlags.South | DragDirectionFlags.East;
break;
case DragDirection.South:
flags = DragDirectionFlags.South;
break;
case DragDirection.SouthWest:
flags = DragDirectionFlags.South | DragDirectionFlags.West;
break;
case DragDirection.West:
flags = DragDirectionFlags.West;
break;
default:
break;
}
return(flags);
}
