C#制作曲线图源码

using System; 
using System.Collections.Generic; 
using System.Text; 
using System.Drawing; 
using System.Drawing.Imaging; 
 
namespace RealtimeCurve 

    /// <SUMMARY> 
    /// 说明:实时图片生成类,在本例中横向坐标上每个像素都会有一个控制点 
    /// 实际开发中可以减少控制点,比如每5个像素用一个控制点 
    /// 这样的效果或许更加逼真 
    /// 作者:周公 
    /// 日期:2008-07-21 
    /// 首发地址:<A href="http://blog.csdn.net/zhoufoxcn/archive/2008/07/21/2682027.aspx">http://blog.csdn.net/zhoufoxcn/archive/2008/07/21/2682027.aspx</A> 
    /// </SUMMARY> 
    public class RealTimeImageMaker 
    { 
        private int width;//要生成的曲线图的宽度 
        private int height;//要生成的曲线图的高度 
        private Point[] pointList;//用来绘制曲线图的关键点,依次将这些点连接起来即得到曲线图 
        private Random random = new Random();//用于生成随机数 
        private Bitmap currentImage;//当前要绘制的图片 
        private Color backColor;//图片背景色 
        private Color foreColor;//图片前景色 
        /// <SUMMARY> 
        /// 图片的高度 
        /// </SUMMARY> 
        public int Height 
        { 
            get { return height; } 
            set { height = value; } 
        } 
     
        /// <SUMMARY> 
        /// 图片的宽度 
        /// </SUMMARY> 
        public int Width 
        { 
            get { return width; } 
            set { width = value; } 
        } 
        /// <SUMMARY> 
        /// 构造函数,指定生成的曲线图的宽度和高度 
        /// </SUMMARY> 
        /// <PARAM name="width">要生成的曲线图的宽度</PARAM> 
        /// <PARAM name="height">要生成的曲线图的高度</PARAM> 
        public RealTimeImageMaker(int width, int height):this(width,height,Color.Gray,Color.Blue) 
        { 
             
        } 
        /// <SUMMARY> 
        /// 构造函数,指定生成的曲线图的宽度、高度及背景色和前景色 
        /// </SUMMARY> 
        /// <PARAM name="width">要生成的曲线图的宽度</PARAM> 
        /// <PARAM name="height">要生成的曲线图的高度</PARAM> 
        /// <PARAM name="backColor">曲线图背景色</PARAM> 
        /// <PARAM name="foreColor">曲线图前景色</PARAM> 
        public RealTimeImageMaker(int width, int height, Color backColor, Color foreColor) 
        { 
            this.width = width; 
            this.height = height; 
            this.backColor = backColor; 
            this.foreColor = foreColor; 
            pointList = new Point[width]; 
            Point tempPoint; 
            //初始化曲线上的所有点坐标 
            for (int i = 0; i < width; i++) 
            { 
 
                tempPoint = new Point(); 
                //曲线的横坐标沿x轴依次递增,在横向位置上每个像素都有一个点 
                tempPoint.X = i; 
                //曲线上每个点的纵坐标随机生成,但保证在显示区域之内 
                tempPoint.Y = random.Next() % height; 
                pointList[i] = tempPoint; 
            } 
        } 
        /// <SUMMARY> 
        /// 获取当前依次连接曲线上每个点绘制成的曲线 
        /// </SUMMARY> 
        /// <RETURNS></RETURNS> 
        public Image GetCurrentCurve() 
        { 
            //currentImage = historyImage.Clone(new Rectangle(1, 0, width - 1, height), PixelFormat.Format24bppRgb); 
            currentImage = new Bitmap(width, height); 
            Point p; 
            //将当前定位曲线图的坐标点前移,并且将横坐标减1, 
            //这样做的效果相当于移除当前第一个点 
            for (int i = 0; i < width-1; i++) 
            { 
                p = pointList[i + 1]; 
                pointList[i] = new Point(p.X-1,p.Y); 
            } 
            Point tempPoint = new Point(); 
            //新生成曲线图定位点的最后一个点的坐标 
            tempPoint.X = width; 
            //曲线上每个点的纵坐标随机生成,但保证在显示区域之内 
            tempPoint.Y = random.Next(DateTime.Now.Millisecond) % height; 
            //在最后再添加一个新坐标点 
            pointList[width-1]=tempPoint; 
            Graphics g = Graphics.FromImage(currentImage); 
            g.Clear(backColor); 
            //绘制曲线图 
            g.DrawLines(new Pen(foreColor), pointList); 
            g.Dispose(); 
            return currentImage; 
        } 
    } 
}
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
namespace RealtimeCurve
{
    ///
    /// 说明:实时图片生成类,在本例中横向坐标上每个像素都会有一个控制点
    /// 实际开发中可以减少控制点,比如每5个像素用一个控制点
    /// 这样的效果或许更加逼真
    /// 作者:周公
    /// 日期:2008-07-21
    /// 首发地址:http://blog.csdn.net/zhoufoxcn/archive/2008/07/21/2682027.aspx
    ///
    public class RealTimeImageMaker
    {
        private int width;//要生成的曲线图的宽度
        private int height;//要生成的曲线图的高度
        private Point[] pointList;//用来绘制曲线图的关键点,依次将这些点连接起来即得到曲线图
        private Random random = new Random();//用于生成随机数
        private Bitmap currentImage;//当前要绘制的图片
        private Color backColor;//图片背景色
        private Color foreColor;//图片前景色
        ///
        /// 图片的高度
        ///
        public int Height
        {
            get { return height; }
            set { height = value; }
        }
 
        ///
        /// 图片的宽度
        ///
        public int Width
        {
            get { return width; }
            set { width = value; }
        }
        ///
        /// 构造函数,指定生成的曲线图的宽度和高度
        ///
        /// 要生成的曲线图的宽度
        /// 要生成的曲线图的高度
        public RealTimeImageMaker(int width, int height):this(width,height,Color.Gray,Color.Blue)
        {
          
        }
        ///
        /// 构造函数,指定生成的曲线图的宽度、高度及背景色和前景色
        ///
        /// 要生成的曲线图的宽度
        /// 要生成的曲线图的高度
        /// 曲线图背景色
        /// 曲线图前景色
        public RealTimeImageMaker(int width, int height, Color backColor, Color foreColor)
        {
            this.width = width;
            this.height = height;
            this.backColor = backColor;
            this.foreColor = foreColor;
            pointList = new Point[width];
            Point tempPoint;
            //初始化曲线上的所有点坐标
            for (int i = 0; i < width; i++)
            {
                tempPoint = new Point();
                //曲线的横坐标沿x轴依次递增,在横向位置上每个像素都有一个点
                tempPoint.X = i;
                //曲线上每个点的纵坐标随机生成,但保证在显示区域之内
                tempPoint.Y = random.Next() % height;
                pointList[i] = tempPoint;
            }
        }
        ///
        /// 获取当前依次连接曲线上每个点绘制成的曲线
        ///
        ///
        public Image GetCurrentCurve()
        {
            //currentImage = historyImage.Clone(new Rectangle(1, 0, width - 1, height), PixelFormat.Format24bppRgb);
            currentImage = new Bitmap(width, height);
            Point p;
            //将当前定位曲线图的坐标点前移,并且将横坐标减1,
            //这样做的效果相当于移除当前第一个点
            for (int i = 0; i < width-1; i++)
            {
                p = pointList[i + 1];
                pointList[i] = new Point(p.X-1,p.Y);
            }
            Point tempPoint = new Point();
            //新生成曲线图定位点的最后一个点的坐标
            tempPoint.X = width;
            //曲线上每个点的纵坐标随机生成,但保证在显示区域之内
            tempPoint.Y = random.Next(DateTime.Now.Millisecond) % height;
            //在最后再添加一个新坐标点
            pointList[width-1]=tempPoint;
            Graphics g = Graphics.FromImage(currentImage);
            g.Clear(backColor);
            //绘制曲线图
            g.DrawLines(new Pen(foreColor), pointList);
            g.Dispose();
            return currentImage;
        }
    }
}窗体关键代码:
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using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Text; 
using System.Windows.Forms; 
using System.Threading; 
 
namespace RealtimeCurve 

    /// <SUMMARY> 
    /// 说明:显示实时曲线图的窗体 
    /// 作者:周公 
    /// 日期:2008-07-21 
    /// 首发地址:<A href="http://blog.csdn.net/zhoufoxcn/archive/2008/07/21/2682027.aspx">http://blog.csdn.net/zhoufoxcn/archive/2008/07/21/2682027.aspx</A> 
    /// </SUMMARY> 
    public partial class FormRealTime : Form 
    { 
        Thread thread; 
        RealTimeImageMaker rti; 
        Color backColor = Color.Black;//指定绘制曲线图的背景色 
        public FormRealTime() 
        { 
            InitializeComponent(); 
            rti = new RealTimeImageMaker(Width, Height, backColor, Color.Green); 
            thread = new Thread(new ThreadStart(Run)); 
            thread.Start(); 
        } 
 
        private void Run() 
        { 
            while (true) 
            { 
                Image image = rti.GetCurrentCurve(); 
                Graphics g = CreateGraphics(); 
                //用指定背景色清除当前窗体上的图象 
                g.Clear(backColor); 
                g.DrawImage(image, 0, 0); 
                g.Dispose(); 
                //每秒钟刷新一次 
                Thread.Sleep(1000); 
            } 
        } 
 
        private void FormRealTime_FormClosing(object sender, FormClosingEventArgs e) 
        { 
            //在窗体即将关闭之前中止线程 
            thread.Abort(); 
        } 
    } 

posted @ 2010-04-28 15:41  ljlxyf  阅读(623)  评论(0编辑  收藏  举报