/// <summary> /// 从计算机屏幕上创建对象 /// </summary> /// <returns>创建的对象</returns> public static ReversibleDrawer FromScreen() { ReversibleDrawer rd = new ReversibleDrawer(); rd.InitFromHWnd(new IntPtr(0)); return(rd); }
/// <summary> /// 从一个窗体句柄创建一个对象 /// </summary> /// <param name="hwnd">窗体句柄</param> /// <returns>创建的对象</returns> public static ReversibleDrawer FromHwnd(IntPtr hwnd) { ReversibleDrawer rd = new ReversibleDrawer(); rd.InitFromHWnd(hwnd); return(rd); }
/// <summary> /// 从一个设备上下文句柄创建对象 /// </summary> /// <param name="hdc">设备上下文句柄</param> /// <returns>创建的对象</returns> public static ReversibleDrawer FromHDC(IntPtr hdc) { ReversibleDrawer rd = new ReversibleDrawer(); rd.InitFromHDC(hdc); return(rd); }
protected override void OnDraw() { base.OnDraw(); if (bolCustomAction) { return; } ReversibleDrawer drawer = null; if (myBindControl != null) { drawer = ReversibleDrawer.FromHwnd(myBindControl.Handle); } else { drawer = ReversibleDrawer.FromScreen(); } drawer.DrawRectangle(myDescRectangle); drawer.Dispose(); }