/// <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);
}
/// <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);
}
protected virtual void OnDraw(bool ResumeView)
{
if (this.ReversibleShape == ReversibleShapeStyle.Custom)
{
if (Draw != null)
{
CaptureMouseMoveEventArgs args = this.CreateArgs();
args.ResumeView = ResumeView;
Draw(this, args);
}
}
else
{
ReversibleDrawer drawer = null;
if (myBindControl == null)
{
drawer = ReversibleDrawer.FromScreen();
}
else
{
drawer = ReversibleDrawer.FromHwnd(myBindControl.Handle);
}
drawer.PenStyle = PenStyle.PS_SOLID;
drawer.PenColor = Color.White;
drawer.LineWidth = 1;
Rectangle rect = GetRectangle(this.StartPosition, this.CurrentPosition);
switch (this.ReversibleShape)
{
case ReversibleShapeStyle.Rectangle:
drawer.DrawRectangle(rect);
break;
case ReversibleShapeStyle.Ellipse:
drawer.DrawEllipse(rect);
break;
case ReversibleShapeStyle.Line:
drawer.DrawLine(this.StartPosition, this.CurrentPosition);
break;
case ReversibleShapeStyle.FillRectangle:
drawer.FillRectangle(rect);
break;
}
drawer.Dispose();
}
}
/// <summary>
/// 绘制可逆矩形
/// </summary>
protected override void OnDraw(bool ResumeView)
{
base.OnDraw(ResumeView);
if (bolCustomAction)
{
return;
}
ReversibleDrawer drawer = null;
if (myBindControl != null)
{
drawer = ReversibleDrawer.FromHwnd(myBindControl.Handle);
}
else
{
drawer = ReversibleDrawer.FromScreen();
}
drawer.DrawRectangle(myDescRectangle);
drawer.Dispose();
}