GraphicsText.cs

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;

namespace RotateText
{
    public class GraphicsText
    {
        private Graphics _graphics;

        public GraphicsText()
        {

        }

        public Graphics Graphics
        {
            get { return _graphics; }
            set { _graphics = value; }
        }

        /// <summary>
        /// 绘制根据矩形旋转文本
        /// </summary>
        /// <param name="s">文本</param>
        /// <param name="font">字体</param>
        /// <param name="brush">填充</param>
        /// <param name="layoutRectangle">局部矩形</param>
        /// <param name="format">布局方式</param>
        /// <param name="angle">角度</param>
        public void DrawString(string s, Font font, Brush brush, RectangleF layoutRectangle, StringFormat format, float angle)
        {
            // 求取字符串大小
            SizeF size = _graphics.MeasureString(s, font);

            // 根据旋转角度，求取旋转后字符串大小
            SizeF sizeRotate = ConvertSize(size, angle);

            // 根据旋转后尺寸、布局矩形、布局方式计算文本旋转点
            PointF rotatePt = GetRotatePoint(sizeRotate, layoutRectangle, format);

            // 重设布局方式都为Center
            StringFormat newFormat = new StringFormat(format);
            newFormat.Alignment = StringAlignment.Center;
            newFormat.LineAlignment = StringAlignment.Center;

            // 绘制旋转后文本
            DrawString(s, font, brush, rotatePt, newFormat, angle);
        }

        /// <summary>
        /// 绘制根据点旋转文本，一般旋转点给定位文本包围盒中心点
        /// </summary>
        /// <param name="s">文本</param>
        /// <param name="font">字体</param>
        /// <param name="brush">填充</param>
        /// <param name="point">旋转点</param>
        /// <param name="format">布局方式</param>
        /// <param name="angle">角度</param>