C#绘制实时曲线，可放大局部图像

C#绘制实时曲线，可放大局部图像 C#绘制实时曲线，可放大局部图像 C#绘制实时曲线，可放大局部图像 C#绘制实时曲线，可放大局部图像

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Windows.Forms;

namespace 实时曲线绘制
{
    class draw
    {


        public Bitmap mybitmap;//用于双缓冲的位图，和画布等大

        Random rm = new Random（）;//随机数产生器


        public void DrawLineS（Color color float Xmax float Ymax PictureBox picbox Point[] ptlist）
        {
            mybitmap = new Bitmap（picbox.Width picbox.Height）;//设定位图大小
            Graphics doublebufferg = Graphics.FromImage（mybitmap）;//从位图上获取“画布”
            doublebufferg.Clear（Color.White）;//用背景色刷新

            //pictureBox1填充为白色，便于显示图像  500*300
            Rectangle rect = new Rectangle（0 0 picbox.Width picbox.Height）;
            doublebufferg.FillRectangle（new SolidBrush（Color.White） rect）;
           
           
            //画X和Y轴
            DrawXY（ref doublebufferg picbox）;
            //X轴上的刻度
            SetYAxis（ref doublebufferg picbox Ymax）;
            //Y轴上的刻度
            SetXAxis（ref doublebufferg picbox Xmax）;

            //要显示的实时曲线部分
            Point temp = new Point（）;
            for （int j = 0; j < picbox.Width/5 - 1; j++）
            {
                temp = ptlist[j + 1];
                ptlist[j] = new Point（temp.X - 5 temp.Y）;
            }

            Point lastpt = new Point（）;
            lastpt.X = picbox.Width;
            lastpt.Y = rm.Next（DateTime.Now.Millisecond） % picbox.Height;
            ptlist[picbox.Width/5 - 1] = lastpt;
            doublebufferg.DrawLines（new Pen（color 1） ptlist）;


            //将缓冲中的位图绘制到我们的窗体上
            Graphics g1 = picbox.CreateGraphics（）;//创建 PictureBox窗体的画布

            g1.Clear（Color.White）;
            g1.DrawImage（mybitmap 0 0）;

        } 


        //完成X轴和Y轴的基本部分
        public void  DrawXY（ref Graphics gPictureBox picbox）
        {
            Pen pen = new Pen（Color.Black 2）;//画笔
            SolidBrush sb = new SolidBrush（Color.Black）;//话刷
            
            //X轴的箭头，实际上是绘制了一个三角形
            Point[] xpts = new Point[3] { 
                new Point（picbox.Width - 35 picbox.Height - 32）
                new Point（picbox.Width - 35 picbox.Height - 28） 
                new Point（picbox.Width - 30 picbox.Height - 30） 
                                        };

            g.DrawLine（pen 30 picbox.Height - 30 picbox.Width - 30 picbox.Height - 30）;
            g.DrawPolygon（pen xpts）;
            g.DrawString（“X“ new Font（“宋体“ 9） sb picbox.Width - 25 picbox.Height - 35）;



            //Y轴的箭头，实际上是绘制了一个三角形
            Point[] ypts = new Point[3] { 
                     new Point（28 35） 
                     new Point（30 30） 
                     new Point（32 35） };
              
            g.DrawLine（pen 30 picbox.Height - 30 30 30）;
            g.DrawPolygon（pen ypts）;
            g.DrawString（“Y“ new Font（“宋体“ 9） sb 15 30）;
        
        }

      
        //绘制Y轴上的刻度

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件        944  2009-10-13 16:40  实时曲线绘制\实时曲线绘制.sln

    ..A..H.     30208  2009-12-01 11:09  实时曲线绘制\实时曲线绘制.suo

     文件       4622  2009-10-13 16:40  实时曲线绘制\UpgradeLog.xml

     文件       3348  2009-10-13 16:40  实时曲线绘制\_UpgradeReport_Files\UpgradeReport.css

     文件         69  2009-10-13 16:40  实时曲线绘制\_UpgradeReport_Files\UpgradeReport_Minus.gif

     文件         71  2009-10-13 16:40  实时曲线绘制\_UpgradeReport_Files\UpgradeReport_Plus.gif

     文件      12505  2008-01-11 01:25  实时曲线绘制\_UpgradeReport_Files\UpgradeReport.xslt

     文件        944  2009-10-15 10:32  实时曲线绘制\Backup\实时曲线绘制.sln

    ..A..H.     17920  2009-10-15 13:39  实时曲线绘制\Backup\实时曲线绘制.suo

     文件       4727  2009-10-15 10:32  实时曲线绘制\Backup\UpgradeLog.xml

     文件       3348  2009-10-15 10:32  实时曲线绘制\Backup\_UpgradeReport_Files\UpgradeReport.css

     文件         69  2009-10-15 10:32  实时曲线绘制\Backup\_UpgradeReport_Files\UpgradeReport_Minus.gif

     文件         71  2009-10-15 10:32  实时曲线绘制\Backup\_UpgradeReport_Files\UpgradeReport_Plus.gif

     文件      12505  2008-01-11 01:25  实时曲线绘制\Backup\_UpgradeReport_Files\UpgradeReport.xslt

     文件        943  2008-12-09 20:07  实时曲线绘制\Backup\Backup\实时曲线绘制.sln

    ..A..H.     13312  2008-12-10 09:10  实时曲线绘制\Backup\Backup\实时曲线绘制.suo

     文件       3278  2008-12-09 20:18  实时曲线绘制\Backup\Backup\实时曲线绘制\实时曲线绘制.csproj

     文件       5339  2008-12-09 23:14  实时曲线绘制\Backup\Backup\实时曲线绘制\draw.cs

     文件       2078  2008-12-10 09:10  实时曲线绘制\Backup\Backup\实时曲线绘制\Form1.cs

     文件       3026  2008-12-09 20:26  实时曲线绘制\Backup\Backup\实时曲线绘制\Form1.Designer.cs

     文件        477  2008-12-09 20:07  实时曲线绘制\Backup\Backup\实时曲线绘制\Program.cs

     文件       6008  2008-12-09 20:24  实时曲线绘制\Backup\Backup\实时曲线绘制\Form1.resx

     文件       1208  2008-12-09 20:07  实时曲线绘制\Backup\Backup\实时曲线绘制\Properties\AssemblyInfo.cs

     文件       2890  2008-12-09 20:07  实时曲线绘制\Backup\Backup\实时曲线绘制\Properties\Resources.Designer.cs

     文件       1101  2008-12-09 20:07  实时曲线绘制\Backup\Backup\实时曲线绘制\Properties\Settings.Designer.cs

     文件        249  2008-12-09 20:07  实时曲线绘制\Backup\Backup\实时曲线绘制\Properties\Settings.settings

     文件       5612  2008-12-09 20:07  实时曲线绘制\Backup\Backup\实时曲线绘制\Properties\Resources.resx

     文件       5049  2009-10-15 13:34  实时曲线绘制\Backup\实时曲线绘制\实时曲线绘制.csproj

     文件      31064  2009-10-15 13:38  实时曲线绘制\Backup\实时曲线绘制\CurveControl.cs

     文件        348  2009-10-15 13:22  实时曲线绘制\Backup\实时曲线绘制\Form1.cs

............此处省略86个文件信息