制作+ Y UP，移动产地C＃System.Drawing.Graphics [英] Make +y UP, Move Origin C# System.Drawing.Graphics

问题描述

我要的起源是在我的窗口中心

I want the origin to be at the center of my window.

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|     ^      |
|     |      |
|     o----->|
|            |
|____________|

.NET希望它是在左上角。

.NET wants it to be in the top left hand corner.

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|            |
|            |
|            |
|            |
V____________|

点网，我试图相处..

Dot net and I are trying to get along..

有谁知道如何只使用Graphics对象做这在C＃？

Does anyone know how to do this in C# just using the Graphics object?

Graphics.TranslateTransform，因为它留下的坐标翻转倒扣不这样做。结合这Graphics.ScaleTransform（1，-1）是不能令人满意的，因为任何使文本出现倒挂。

Graphics.TranslateTransform doesn't do it since it leaves the coordinates flipped upside down. Combining this Graphics.ScaleTransform(1,-1) isn't satisfactory either since that makes text appear upside down.

推荐答案

一的解决办法是使用TranslateTransform属性。然后，而不是使用点/的PointF结构，你可以创建自己的FlippedPoint / FlippedPointF结构有隐式转换为点/的PointF（但铸造他们COORDS得到翻转）：

One solution would be to use the TranslateTransform property. Then, instead of using the Point/PointF structs you could create a FlippedPoint/FlippedPointF structs of your own that have implicit casts to Point/PointF (but by casting them the coords get flipped):

public struct FlippedPoint
{
    public int X { get; set; }
    public int Y { get; set; }

    public FlippedPoint(int x, int y) : this()
    { X = x; Y = y; }

    public static implicit operator Point(FlippedPoint point)
    { return new Point(-point.X, -point.Y); }

    public static implicit operator FlippedPoint(Point point)
    { return new FlippedPoint(-point.X, -point.Y); }
}

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