C# 具有背景栅格的绘曲线类（一）（转帖）

原文转自：http://blog.csdn.net/liguangqang/article/details/2608228

本文实现了用于绘制曲线的通用类，类实现对背景栅格的绘制，并将由外部传入到先进先出栈中的数据作为

本文实现了用于绘制曲线的通用类，类实现对背景栅格的绘制，并将由外部传入到先进先出栈中的数据作为

曲线的关键点，返回一个位图的对象用于显示曲线。

曲线的关键点，返回一个位图的对象用于显示曲线。  

using System;  
  
using System.Collections.Generic;  
  
using System.Collections;  
  
using System.Text;  
  
using System.Drawing;  
  
  
  
namespace PID_Control  
  
{  
  
    class Curve  
  
    {  
  
        public  Queue KeyDots=new Queue(); //曲线关键点  
  
        private Graphics objGraphic;//提供绘制的方法  
  
        public  Bitmap objBitmap;//位图对象  
  
  
  
        private Point CurrentPoint = new Point(0, 0); //当前点  
  
        private Point LastPoint = new Point(50, 635); //最后的点  
  
  
  
        private int m_Width = 900;// 图像宽度  
  
        private int m_Height = 650;//图像高度  
  
        private int m_XGrid = 50;//栅格X长度  
  
        private int m_YGrid = 50;//栅格Y长度  
  
  
  
        private Color m_BorderColor = Color.Blue; //边框颜色  
  
        private Color m_BgColor = Color.Black;//背景颜色   
  
        private Color m_GridColor = Color.Gray;//栅格颜色  
  
  
  
        public int Width  
  
        {  
  
            set { m_Width =value; }  
  
            get { return m_Width; }  
  
        }  
  
        public int Height  
  
        {  
  
            set { m_Height = value; }  
  
            get { return m_Height; }  
  
        }  
  
        public Color BorderColor  
  
        {  
  
            set { m_BorderColor = value; }  
  
            get { return m_BorderColor; }  
  
        }  
  
        public Color BgColor  
  
        {  
  
            set { m_BgColor = value; }  
  
            get { return m_BgColor; }  
  
        }  
  
        public Color GridColor  
  
        {  
  
            set { m_GridColor = value; }  
  
            get { return m_GridColor; }  
  
        }  
  
        public int XGrid  
  
        {  
  
            set { m_XGrid = value; }  
  
            get { return m_XGrid; }  
  
        }  
  
        public int YGrid  
  
        {  
  
            set { m_YGrid = value; }  
  
            get { return m_YGrid; }  
  
        }  
  
  
  
        public Curve()  
  
        {  
  
            InitializeGraph();  
  
            DrawContent();  
  
        }  
  
        public void InitializeGraph()  
  
        {  
  
            //创建指定高度和宽度的位图对象   
  
            objBitmap = new Bitmap(Width, Height);  
  
            //从位图对象中创建Graphics对象  
  
            objGraphic = Graphics.FromImage(objBitmap);  
  
            //创建指定颜色的矩形边框   
  
            objGraphic.DrawRectangle(new Pen(BorderColor, 1),0,0, Width, Height);  
  
            objGraphic.FillRectangle(new SolidBrush(BgColor),1,1, Width, Height);  
  
            //画X方向栅格并标注   
  
            int t = 0;  
  
            for (int i = Height-15; i >= 0; i -= YGrid)  
  
            {  
  
                objGraphic.DrawLine(new Pen(GridColor, 1), 50, i, Width, i);  
  
                objGraphic.DrawString(System.Convert.ToString(t*5000), new Font("宋体", 10), new SolidBrush(Color.White), 0, i);  
  
                t++;  
  
            }  
  
            //画Y方向栅格并标注   
  
            t = 0;  
  
            for (int i = 50; i < Width; i += XGrid)  
  
            {  
  
                objGraphic.DrawLine(new Pen(GridColor, 1), i, 0, i, Height-15);  
  
                objGraphic.DrawString(System.Convert.ToString(t), new Font("宋体", 10), new SolidBrush(Color.White), i, Height-13);  
  
                t++;  
  
            }  
  
        }  
  
        public void DrawContent()  
  
        {  
  
            while (KeyDots.Count > 0)  
  
            {  
  
                //设置新点坐标   
  
                CurrentPoint.X = LastPoint.X + 2;   
  
                CurrentPoint.Y = Height-System.Convert.ToInt16(KeyDots.Dequeue())-15;  
  
                objGraphic.DrawLine(new Pen(Color.Red, 2),LastPoint,CurrentPoint);  
  
                //重置最后点坐标   
  
                LastPoint = CurrentPoint;  
  
                if (LastPoint.X > Width)  
  
                {  
  
                    InitializeGraph();  
  
                    LastPoint.X = 50;  
  
                }  
  
            }  
  
        }  
  
    }  
  
}