#region 绘制背景网格
   /// <summary>
   /// 刷新背景网格线，并返回背景图片（背景不判断是否滚动）
   /// </summary>
   /// <returns>返回背景图片</returns>
   private System.Drawing.Bitmap RefBackground()
   {
    if(this.picCurveShow.Height<1 || this.picCurveShow.Width < 1)
    {
     return null;
    }

//创建网格背景线画笔
    System.Drawing.Pen gridPen = new Pen(this.gridColor,this.gridPenWidth);
    //创建网格文字画笔
    System.Drawing.Pen gridCompartPen = new Pen(this.gridForeColor,this.gridCompart);

System.Drawing.Bitmap bitmap = new Bitmap(this.picCurveShow.Width,this.picCurveShow.Height);
    System.Drawing.Graphics backGroundImage = System.Drawing.Graphics.FromImage(bitmap);
   
    //坐标原点偏移
    backGroundImage.TranslateTransform(this.coordinate,0);
  
    //填充背景色
    backGroundImage.Clear(this.backGroundColor);

//绘制表格背景线
    //绘制背景横轴线
    for(float i = this.picCurveShow.Height;i>=0;i=i-this.gridHeight)
    {
     System.Drawing.PointF pointFBegin = new PointF(0F,i);
     System.Drawing.PointF pointFEnd = new PointF(this.picCurveShow.Width,i);
     backGroundImage.DrawLine(gridPen,pointFBegin,pointFEnd);
    }

//绘制背景纵轴线
    for(float i = this.picCurveShow.Width; i>=0; i=i-this.gridWidth)
    {
     System.Drawing.PointF pointFBegin ;
     System.Drawing.PointF pointFEnd ;

if(i-gridRemoveX >=0)
     {
      pointFBegin = new PointF(i-gridRemoveX ,0F);
      pointFEnd = new PointF(i-gridRemoveX ,this.picCurveShow.Height);
      backGroundImage.DrawLine(gridPen,pointFBegin,pointFEnd);
     }
    }

//绘制分隔线。
    backGroundImage.DrawLine(gridCompartPen,0,0,0,this.picCurveShow.Height);

//绘制正常值上限，下限
    //绘制分隔线刻度文字
    System.Drawing.Font backGroundFont = new Font("Arial",this.gridFontSize);
    float fontHight = backGroundFont.GetHeight();
    System.Drawing.SolidBrush brush = new SolidBrush(this.gridForeColor);
    //判断上下线值是否有效（非零）
    System.Drawing.Pen upperAndLowerPen = new Pen(this.yUpperAndLowerColor,this.yUpperAndLowerPenWidth);
    upperAndLowerPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash;

if(this.yLower > 0)
    {
     float yHeight = (float)this.picCurveShow.Height - (this.yLower /(this.yMaxValue - this.yMinValue)) * (float)this.picCurveShow.Height;
     backGroundImage.DrawLine(upperAndLowerPen,0,yHeight,this.picCurveShow.Width,yHeight);
     //绘制下限文字
     backGroundImage.DrawString(this.yLowerString,backGroundFont,brush,-this.coordinate,yHeight - fontHight/2);
    }

if(this.yUpper > 0)
    {
     float yHeight = (float)this.picCurveShow.Height - (this.yUpper /(this.yMaxValue - this.yMinValue)) * (float)this.picCurveShow.Height;
     backGroundImage.DrawLine(upperAndLowerPen,0,yHeight,this.picCurveShow.Width,yHeight);
     //绘制下限文字
     backGroundImage.DrawString(this.yUpperString,backGroundFont,brush,-this.coordinate,yHeight - fontHight/2);
    }
   
    //绘制最大值文字
    backGroundImage.DrawString(this.yMaxString,backGroundFont,brush,-this.coordinate,0);
    //绘制最小值文字
    backGroundImage.DrawString(this.yMinString,backGroundFont,brush,-this.coordinate,(float)this.picCurveShow.Height - fontHight);

//绘制曲线窗体标题
    brush = new SolidBrush(this.titleColor);
    backGroundImage.DrawString(this.title,backGroundFont,brush,(this.picCurveShow.Width / 2 - this.title.Length * this.gridFontSize),0);

//绘制系统时间
    if(this.showTime)
    {
     brush = new SolidBrush(this.showTimeColor);
     backGroundImage.DrawString(System.DateTime.Now.ToString("T"),backGroundFont,brush,(this.picCurveShow.Width - 105),this.picCurveShow.Height - fontHight);
    }
    return bitmap;
   }

/// <summary>
   /// 刷新背景网格线，并返回背景图片（背景判断是否滚动）
   /// </summary>
   /// <returns>返回背景图片</returns>
   private System.Drawing.Bitmap RefAndRemoveBackground()
   {
    //判断是否需要移动纵轴线
    if(this.removeGrid)
    {
     if(this.gridRemoveX >= this.gridWidth)
     {
      this.gridRemoveX = 1;
     }
     else
     {
      this.gridRemoveX = this.gridRemoveX + curveRemove;
     }
    }
    return this.RefBackground();
   }
   #endregion

/// <summary>
   /// 刷新背景网格线，显示曲线
   /// </summary>
   public void ShowCurve()
   {
    //窗体高度发生变化，先刷新数组Y坐标值
    if((this.picCurveShow.Height != this.lastTimeSystemWindowHeight)||(this.picCurveShow.Width != this.lastTimeSystemWindowWidth))
    {
     this.RefurbishArray();
    }

System.Drawing.Bitmap bitmap = this.RefAndRemoveBackground();
    System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage(bitmap);
    //绘制曲线
    //判断数组中是否有两个以上的数值

//绘制直线
    if(this.noteNow > 1)
    {
     //声明绘制曲线的Point数组
     System.Drawing.Point[] pointsTemp = new Point[this.noteNow];
     System.Drawing.Point[] points;
     //数组下标；
     int pointI = 0;
     for(int i=0;i<=this.noteNow-1;i++)
     {
      if(this.noteMessages[i].X >= this.coordinate)
      {
       pointsTemp[pointI].X = this.noteMessages[i].X;
       pointsTemp[pointI].Y = this.noteMessages[i].Y;
       pointI ++;
      }
     }
     points = new Point[pointI];
     Array.Copy(pointsTemp,0,points,0,pointI);
     graphics.DrawLines(new Pen(this.curveColor,this.curvePenWidth),points);
    }

//绘制曲线
//    if(this.noteNow >=2)
//    {
//     graphics.DrawCurve(new Pen(this.curveColor,this.curvePenWidth),points);
//    }
    this.picCurveShow.Image = bitmap;
   }

/// <summary>
   /// 刷新背景网格线，显示曲线，自动添加即时数值
   /// </summary>
   /// <param name="Value">即时数值</param>
   public void ShowCurve(float Value)
   {
    this.AddNewValue(Value);
    this.ShowCurve();
   }

#endregion

#region 自动将最新采样数值添加到数组
   /// <summary>
   /// 自动将最新采样数值添加到数组
   /// </summary>
   /// <param name="newValue">最新采样数值</param>
   private void AddNewValue(float newValue)
   {
    //先判断数组下标
    if(this.noteNow >= this.maxNote -1)
    {
     //数组已经存满数值
     for(int i = 0;i< this.noteNow;i++)
     {
      this.noteMessages[i] = this.noteMessages[i+1];
      this.noteMessages[i].X = this.noteMessages[i].X - curveRemove;
     }
     this.noteMessages[this.noteNow].Value = newValue;
     this.noteMessages[this.noteNow].time = System.DateTime.Now;
     this.noteMessages[this.noteNow].X = this.picCurveShow.Width;
     this.noteMessages[this.noteNow].Y = (int)(this.picCurveShow.Height - (newValue /(this.yMaxValue - this.yMinValue)) * this.picCurveShow.Height);

}
    else
    {
     //数组未存满数值
     for(int i = 0;i< this.noteNow;i++)
     {
      this.noteMessages[i].X = this.noteMessages[i].X - curveRemove;
     }
     this.noteMessages[this.noteNow].Value = newValue;
     this.noteMessages[this.noteNow].time = System.DateTime.Now;
     this.noteMessages[this.noteNow].X = this.picCurveShow.Width;
     System.Random r= new Random();
     this.noteMessages[this.noteNow].Y = (int)(this.picCurveShow.Height - (newValue /(this.yMaxValue - this.yMinValue)) * this.picCurveShow.Height);

this.noteNow ++;
    }
   }
   #endregion

#region 窗体大小变化，自动刷新窗体Y轴值
   /// <summary>
   /// 窗体大小变化，自动刷新窗体Y轴值
   /// </summary>
   private void RefurbishArray()
   {
    if(this.noteNow <= 0)
     return;

for(int i= 0;i <= this.noteNow;i++)
    {
     this.noteMessages[i].X = this.noteMessages[i].X +(this.picCurveShow.Width - this.lastTimeSystemWindowWidth);
     this.noteMessages[i].Y = (int)(this.picCurveShow.Height - (this.noteMessages[i].Value /(this.yMaxValue - this.yMinValue)) * this.picCurveShow.Height);
    }
    //改变窗体大小时自动修改窗体高度临时值
    this.lastTimeSystemWindowHeight = this.picCurveShow.Height;
    this.lastTimeSystemWindowWidth = this.picCurveShow.Width;
   }
   #endregion

#region 显示鼠标当前点坐标值
   /// <summary>
   /// 显示鼠标当前点坐标值
   /// </summary>
   /// <param name="X">鼠标X坐标</param>
   /// <param name="Y">鼠标Y坐标</param>
   private void ShowMouseCoordinateMessage(int X,int Y)
   {
    float x = (int)X;
    float y = (int)Y;

//鼠标位置在偏移量右侧时发生
    if(x >= this.coordinate)
    {
     foreach(CoordinatesValue valueTemp in this.noteMessages)
     {
      if(((valueTemp.X <= (x + this.xYPrecision))&&(valueTemp.X >= (x - this.xYPrecision)))&&((valueTemp.Y >= (y - this.xYPrecision))&&(valueTemp.Y <= (y + this.xYPrecision))))
      {
       this.labShowView.Text ="Time:" + valueTemp.time.ToString("T") + "    Value:" +   valueTemp.Value.ToString() ;
      
       int labX;
       int labY;

if(Y <= this.labShowView.Height )
       {
        labY = Y + this.labShowView.Height + 5;
       }
       else
       {
        labY = Y-this.labShowView.Height;
       }

if(X >= this.picCurveShow.Width - this.labShowView.Width)
       {
        labX = X - this.labShowView.Width;
       }
       else
       {
        labX = X+5;
       }

this.labShowView.Top = labY;
       this.labShowView.Left = labX;
       this.labShowView.BringToFront();
       this.labShowView.Visible = true;

return;
      }
     }
    }

this.labShowView.Visible = false;
   }
   #endregion

private void picCurveShow_DoubleClick(object sender, System.EventArgs e)
   {
    //双击最大化及其正常缩略显示切换
    if(this.Dock == System.Windows.Forms.DockStyle.Fill)
    {
     this.Dock = System.Windows.Forms.DockStyle.None;
    }
    else
    {
     this.BringToFront();
     this.Dock = System.Windows.Forms.DockStyle.Fill;
    }
   }

private void picCurveShow_Resize(object sender, System.EventArgs e)
   {
    //改变窗体大小时自动重绘表格
    this.ShowCurve();
   }

private void CurveControl_Load(object sender, System.EventArgs e)
   {
    //控件加载时

//鼠标X，Y信息数组初始化
    this.noteMessages = new CoordinatesValue[this.maxNote];
    //初始化窗体高度值
    this.lastTimeSystemWindowHeight = this.picCurveShow.Height;
    this.lastTimeSystemWindowWidth = this.picCurveShow.Width;
   }

private void picCurveShow_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
   {
    //移动鼠标
    this.ShowMouseCoordinateMessage(e.X,e.Y);
   }

private void picCurveShow_MouseLeave(object sender, System.EventArgs e)
   {
    //鼠标离开曲线控件
    this.labShowView.Visible = false;
   }
}

#region 定义鼠标X，Y 坐标值，及该点坐标记录值、记录时间
/// <summary>
/// 定义鼠标X，Y 坐标值，及该点坐标记录值、记录时间
/// </summary>
struct CoordinatesValue
{
   public int X;
   public int Y;
   public float Value;
   public System.DateTime time;
}
#endregion
}