C#矩形圆角绘制改进版

C#矩形圆角绘制改进版2013-11-13一、前言

上一篇绘制矩形圆角的方式不够完善，感觉写的太过于复杂，将简单的问题复杂化了，本文对此进行了相应的改进，增强对各个圆角的半径的控制。绘制后的圆角效果图如下：

二、圆角半径设计

对于矩行而言，圆角分为左上角、右上角、左下角和右下角。每一个角都会存在相应的半径，用于控制每一个圆角的绘制。设计如下：

public struct ArcRadius{private int _rightBottom;private int _rightTop;private int _leftBottom;private int _leftTop;public static readonly ArcRadius Empty =new ArcRadius（0）;public ArcRadius（int radiusLength）{if （radiusLength < 0）{radiusLength = 0;}this._rightBottom = this._rightTop = this._leftBottom = this._leftTop = radiusLength;}public ArcRadius（int leftTop, int rightTop, int leftBottom, int rightBottom）{this._rightBottom = rightBottom < 0 ？ 0 : rightBottom;this._rightTop = rightTop < 0 ？ 0 : rightTop;this._leftBottom = leftBottom < 0 ？ 0 : leftBottom;this._leftTop = leftTop < 0 ？ 0 : leftTop;}private bool IsAllEqual（）{return （（this.RightBottom == this.RightTop） && （this.RightBottom == this.LeftBottom）） && （this.RightBottom == this.LeftTop）;}public int All{get{if （！IsAllEqual（））{return -1;}return this.RightBottom;}set{if （value < 0）{value = 0;}this.RightBottom = this.RightTop = this.LeftBottom = this.LeftTop = value;}}public int LeftTop{get{return this._leftTop;}set{if （value < 0）{value = 0;}this._leftTop = value;}} public int RightTop{get{return this._rightTop;}set{if （value < 0）{value = 0;}this._rightTop = value;}} public int LeftBottom{get{return this._leftBottom;}set{if （value < 0）{value = 0;}this._leftBottom = value;}}public int RightBottom{get{return this._rightBottom;}set{if （value < 0）{value = 0;}this._rightBottom = value;}}public static bool operator ==（ArcRadius p1, ArcRadius p2）{return （（（（p1.RightTop == p2.RightTop） && （p1.RightBottom == p2.RightBottom））&& （p1.LeftBottom == p2.LeftBottom）） && （p1.LeftTop == p2.LeftTop））;}public static bool operator ！=（ArcRadius p1, ArcRadius p2）{return ！（p1 == p2）;}public override string ToString（）{return LeftTop + ", " + RightTop + ", " + LeftBottom + ", " + RightBottom;}}