C# 具有背景栅格的绘曲线类（一）

    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。 

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;                }            }        }    }}