public void Dispose()
{
if (_drag != null)
{
_drag.Dispose();
_drag = null;
}
}
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));
}
public Rectangle End()
{
Rectangle result;
using (DesktopGraphics graphics = new DesktopGraphics())
{
result = _drag.End(graphics);
}
_drag.Dispose();
_drag = null;
_setCursor.Dispose();
_setCursor = null;
return(result);
}
protected override void OnDragCancelled()
{
_dragging = false;
using (DesktopGraphics graphics = new DesktopGraphics())
{
if (_rectangleDrag != null)
{
_rectangleDrag.End(graphics);
_rectangleDrag.Dispose();
_rectangleDrag = null;
}
}
SetCursor(null);
base.OnDragCancelled();
}
protected override void OnDragEnd(MouseEventArgs args)
{
_dragging = false;
Rectangle bounds = GetSizedRectangle();
using (DesktopGraphics graphics = new DesktopGraphics())
{
if (_rectangleDrag != null)
{
_rectangleDrag.End(graphics);
_rectangleDrag.Dispose();
_rectangleDrag = null;
}
}
SetCursor(null);
Control.Bounds = bounds;
Control.Invalidate();
base.OnDragEnd(args);
}
public void Start(Point startPoint)
{
if (_enabled)
{
_drag = new RectangleDrag();
_startPoint = startPoint;
if (_dragCursor != null)
{
if (_setCursor != null)
{
_setCursor.Dispose();
}
_setCursor = new SetCursor(_dragCursor);
}
using (DesktopGraphics graphics = new DesktopGraphics())
{
_drag.Start(_control.Parent.RectangleToScreen(_control.Bounds), graphics);
}
}
}