相加 System.Drawing.Points

Question

我遇到了以下使用 System.Drawing.Size class 的构造函数添加两个 System.Drawing.Point 对象的代码。

// System.Drawing.Point mpWF contains window-based mouse coordinates
// extracted from LParam of WM_MOUSEMOVE message.

// Get screen origin coordinates for WPF window by passing in a null Point.
System.Windows.Point originWpf = _window.PointToScreen(new System.Windows.Point());

// Convert WPF doubles to WinForms ints.
System.Drawing.Point originWF = new System.Drawing.Point(Convert.ToInt32(originWpf.X),
    Convert.ToInt32(originWpf.Y));

// Add WPF window origin to the mousepoint to get screen coordinates.
mpWF = originWF + new Size(mpWF);

我认为在最后一个语句中使用 + new Size(mpWF) 是一种 hack，因为当我阅读上面的代码时，它减慢了我的速度，因为我没有立即理解发生了什么。

我尝试按如下方式解构最后一条语句：

System.Drawing.Point tempWF = (System.Drawing.Point)new Size(mpWF);
mpWF = originWF + tempWF;  // Error: Addition of two Points not allowed.

但它不起作用，因为没有为两个 System.Drawing.Point 对象定义加法。有没有其他比原始代码更直观的方法对两个Point对象进行加法？

Answer 1

为其创建一个Extension Method：

public static class ExtensionMethods
{
    public static Point Add(this Point operand1, Point operand2)
    {
        return new Point(operand1.X + operand2.X, operand1.Y + operand2.Y);
    }
}

用法：

 var p1 = new Point(1, 1);
 var p2 = new Point(2, 2);
 var reult =p1.Add(p2);

相加 System.Drawing.Points

Adding together System.Drawing.Points

c#

wpf

system.drawing

mousemove

winforms