public class Curve2D:DrawingChart
{
#region 私有成员
private Graphics objGraphics;//Graphics 类提供将对象绘制到显示设备的方法
private Bitmap objBitmap;//位图对象
private float fltWidth = 480;//图像宽度
private float fltHeight = 248;//图像高度
private float fltXSlice = 50;//X轴刻度宽度
private float fltYSlice = 50;//Y轴刻度宽度
private float fltYSliceValue = 20;//Y轴刻度的数值宽度
private float fltYSliceBegin = 0;//Y轴刻度开始值
int xSliceRate=1; // X轴刻度间隔数
private float fltTension = 0.5f;
private string strTitle = "曲线图";//标题
private string strXAxisText = "月份";//X轴说明文字
private string strYAxisText = "万元";//Y轴说明文字
private string[] strsKeys = new string[] { "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月" };//键
private IList<float[]> fltsValues = new List< float[]>() {new float[]{ 20.0f, 30.0f, 50.0f, 55.4f, 21.6f, 12.8f, 99.5f, 36.4f, 78.2f, 56.4f, 45.8f, 66.5f, 99.5f, 36.4f, 78.2f, 56.4f, 45.8f, 66.5f, 20.0f, 30.0f, 50.0f, 55.4f, 21.6f, 12.8f }};//值
private Color clrBgColor = Color.Snow;//背景色
private Color clrTextColor = Color.Black;//文字颜色
private Color clrBorderColor = Color.Black;//整体边框颜色
private Color clrAxisColor = Color.Black;//轴线颜色
private Color clrAxisTextColor = Color.Black;//轴说明文字颜色
private Color clrSliceTextColor = Color.Black;//刻度文字颜色
private Color clrSliceColor = Color.Black;//刻度颜色
private Color[] clrsCurveColors = new Color[] { Color.Red, Color.Blue };//曲线颜色
private float fltXSpace = 60f;//图像左右距离边缘距离
private float fltYSpace = 40f;//图像上下距离边缘距离
private int intFontSize = 9;//字体大小号数
private float fltXRotateAngle = 30f;//X轴文字旋转角度
private float fltYRotateAngle = 0f;//Y轴文字旋转角度
private int intCurveSize = 2;//曲线线条大小
private int intFontSpace = 0;//intFontSpace是字体大小和距离调整出来的一个比较适合的数字
#endregion
#region 公共属性
///<summary>
///图像的宽度
///</summary>
public float Width
{
set
{
if (value < 100)
{
fltWidth = 100;
}
else
{
fltWidth = value;
}
}
get
{
if (fltWidth <= 100)
{
return 100;
}
else
{
return fltWidth;
}
}
}
///<summary>
///图像的高度
///</summary>
public float Height
{
set
{
if (value < 100)
{
fltHeight = 100;
}
else
{
fltHeight = value;
}
}
get
{
if (fltHeight <= 100)
{
return 100;
}
else
{
return fltHeight;
}
}
}
///<summary>
///X轴刻度宽度
///</summary>
public float XSlice
{
set { fltXSlice = value; }
get { return fltXSlice; }
}
///<summary>
///Y轴刻度宽度
///</summary>
public float YSlice
{
set { fltYSlice = value; }
get { return fltYSlice; }
}
///<summary>
///Y轴刻度的数值宽度
///</summary>
public float YSliceValue
{
set { fltYSliceValue = value; }
get { return fltYSliceValue; }
}
///<summary>
///Y轴刻度开始值
///</summary>
public float YSliceBegin
{
set { fltYSliceBegin = value; }
get { return fltYSliceBegin; }
}
public float? YSliceEnd
{
get;
set;
}
///<summary>
///张力系数
///</summary>
public float Tension
{
set
{
if (value < 0.0f && value > 1.0f)
{
fltTension = 0.5f;
}
else
{
fltTension = value;
}
}
get
{
return fltTension;
}
}
///<summary>
///标题
///</summary>
public string Title
{
set { strTitle = value; }
get { return strTitle; }
}
///<summary>
///键,X轴数据
///</summary>
public string[] Keys
{
set { strsKeys = value; }
get { return strsKeys; }
}
///<summary>
///值,Y轴数据
///</summary>
public IList< float[]> Values
{
set { fltsValues = value; }
get { return fltsValues; }
}
///<summary>
///背景色
///</summary>
public Color BgColor
{
set { clrBgColor = value; }
get { return clrBgColor; }
}
///<summary>
///文字颜色
///</summary>
public Color TextColor
{
set { clrTextColor = value; }
get { return clrTextColor; }
}
///<summary>
///整体边框颜色
///</summary>
public Color BorderColor
{
set { clrBorderColor = value; }
get { return clrBorderColor; }
}
///<summary>
///轴线颜色
///</summary>
public Color AxisColor
{
set { clrAxisColor = value; }
get { return clrAxisColor; }
}
///<summary>
///X轴说明文字
///</summary>
public string XAxisText
{
set { strXAxisText = value; }
get { return strXAxisText; }
}
///<summary>
///Y轴说明文字
///</summary>
public string YAxisText
{
set { strYAxisText = value; }
get { return strYAxisText; }
}
///<summary>
///轴说明文字颜色
///</summary>
public Color AxisTextColor
{
set { clrAxisTextColor = value; }
get { return clrAxisTextColor; }
}
///<summary>
///刻度文字颜色
///</summary>
public Color SliceTextColor
{
set { clrSliceTextColor = value; }
get { return clrSliceTextColor; }
}
///<summary>
///刻度颜色
///</summary>
public Color SliceColor
{
set { clrSliceColor = value; }
get { return clrSliceColor; }
}
///<summary>
///曲线颜色
///</summary>
public Color[] CurveColors
{
set { clrsCurveColors = value; }
get { return clrsCurveColors; }
}
///<summary>
///X轴文字旋转角度
///</summary>
public float XRotateAngle
{
get { return fltXRotateAngle; }
set { fltXRotateAngle = value; }
}
///<summary>
///Y轴文字旋转角度
///</summary>
public float YRotateAngle
{
get { return fltYRotateAngle; }
set { fltYRotateAngle = value; }
}
///<summary>
///图像左右距离边缘距离
///</summary>
public float XSpace
{
get { return fltXSpace; }
set { fltXSpace = value; }
}
///<summary>
///图像上下距离边缘距离
///</summary>
public float YSpace
{
get { return fltYSpace; }
set { fltYSpace = value; }
}
///<summary>
///字体大小号数
///</summary>
public int FontSize
{
get { return intFontSize; }
set { intFontSize = value; }
}
///<summary>
///曲线线条大小
///</summary>
public int CurveSize
{
get { return intCurveSize; }
set { intCurveSize = value; }
}
#endregion
///<summary>
///自动根据参数调整图像大小
///</summary>
public void Fit()
{
if (Keys.Length == 0)
return;
//计算字体距离
intFontSpace = FontSize + 5;
//计算图像边距
// float fltSpace = Math.Min(Width / 6, Height / 6);
//XSpace = Width/6;
//YSpace = Height/6;
// XSpace = 60;
//YSpace = 40;
//计算X轴刻度宽度
//if (Keys.Length > 1)
//{
// XSlice = (Width - 2 * XSpace) / (Keys.Length - 1);
// if (XSlice < 25)
// {
// XSlice = 25;
// }
//}
//else
// XSlice = Width;
xSliceRate = 1;
if (Keys.Length > 1)
{
XSlice = (Width - 2 * XSpace) / (Keys.Length - 1);
if (XSlice < 25)
{
xSliceRate = (int)(25 / XSlice);
XSlice *= xSliceRate;
}
}
else
XSlice = Width;
//计算Y轴刻度宽度和Y轴刻度开始值
float fltMinValue = int.MaxValue;
float fltMaxValue = 0;
// int n = 0;
foreach (var item in Values)
{
if(item.Length==0)
continue;
float min = item.Min(), max = item.Max();
//for (int i = 0; i < item.Length; i++)
//{
// Values[n][i] *= Height /max ;
//}
//min = Values[n].Min();
//max = Values[n].Max();
if (min < fltMinValue)
fltMinValue = min;
if (max > fltMaxValue)
fltMaxValue = max;
// n++;
}
if (YSliceBegin > fltMinValue)
{
// YSliceBegin = fltMinValue;
}
// int intYSliceCount = (int)(fltMaxValue / YSliceValue);
int intYSliceCount = (int)((Height - 2 * YSpace) / 20);
//if (fltMaxValue % YSliceValue != 0)
//{
// intYSliceCount++;
//}
if (YSliceEnd.HasValue)
{
YSliceValue = (int)(((float)YSliceEnd - YSliceBegin) / intYSliceCount);
//if (intYSliceCount > 20 && YSliceValue < 2)
// YSliceValue = 2;
YSlice = (Height - 2 * YSpace) / (((float)YSliceEnd - YSliceBegin)/YSliceValue);
while (YSlice < 20)
{
YSliceValue++;
YSlice = (Height - 2 * YSpace) / (((float)YSliceEnd - YSliceBegin) / YSliceValue);
}
}
else
{
YSliceValue = (int)(fltMaxValue / intYSliceCount + 1);
//intYSliceCount =(int)( fltMaxValue / YSliceValue)-1;
YSlice = (Height - 2 * YSpace) / intYSliceCount;
// YSlice = ((Height - 2 * YSpace )/ fltMaxValue) * YSliceValue;
}
}
///<summary>
///生成图像并返回bmp图像对象
///</summary>
///<returns></returns>
public override Bitmap DrawImage()
{
Fit();
InitializeGraph();
int intKeysCount = Keys.Length;
//int intValuesCount = Values.Count;
//intValuesCount-=intValuesCount%intKeysCount;
//if (intValuesCount % intKeysCount == 0)
//{
// int intCurvesCount = intValuesCount / intKeysCount;
// for (int i = 0; i < intCurvesCount; i++)
// {
// float[] fltCurrentValues = new float[intKeysCount];
// for (int j = 0; j < intKeysCount; j++)
// {
// fltCurrentValues[j] = Values[i * intKeysCount + j];
// }
// DrawContent(ref objGraphics, fltCurrentValues, clrsCurveColors[i]);
// }
//}
//else
//{
// objGraphics.DrawString("发生错误,Values的长度必须是Keys的整数倍!", new Font("宋体", FontSize + 5), new SolidBrush(TextColor), new Point((int)XSpace, (int)(Height / 2)));
//}
int n=0;
foreach(float[] item in Values)
{
DrawContent(ref objGraphics, item, clrsCurveColors[n++]);
}
return objBitmap;
}
///<summary>
///初始化和填充图像区域,画出边框,初始标题
///</summary>
private void InitializeGraph()
{
//根据给定的高度和宽度创建一个位图图像
objBitmap = new Bitmap((int)Width, (int)Height);
//从指定的objBitmap对象创建objGraphics对象(即在objBitmap对象中画图)
objGraphics = Graphics.FromImage(objBitmap);
//根据给定颜色(LightGray)填充图像的矩形区域(背景)
objGraphics.DrawRectangle(new Pen(BorderColor, 1), 0, 0, Width - 1, Height - 1);//画边框
objGraphics.FillRectangle(new SolidBrush(BgColor), 1, 1, Width - 2, Height - 2);//填充边框
//画X轴,注意图像的原始X轴和Y轴计算是以左上角为原点,向右和向下计算的
float fltX1 = XSpace;
float fltY1 = Height - YSpace;
float fltX2 = Width - XSpace + XSlice / 2;
float fltY2 = fltY1;
objGraphics.DrawLine(new Pen(new SolidBrush(AxisColor), 1), fltX1, fltY1, fltX2, fltY2);
//画Y轴
fltX1 = XSpace;
fltY1 = Height - YSpace;
fltX2 = XSpace;
fltY2 = YSpace - YSlice / 2;
objGraphics.DrawLine(new Pen(new SolidBrush(AxisColor), 1), fltX1, fltY1, fltX2, fltY2);
//初始化轴线说明文字
SetAxisText(ref objGraphics);
//初始化X轴上的刻度和文字
SetXAxis(ref objGraphics);
//初始化Y轴上的刻度和文字
SetYAxis(ref objGraphics);
//初始化标题
CreateTitle(ref objGraphics);
}
///<summary>
///初始化轴线说明文字
///</summary>
///<paramname="objGraphics"></param>
private void SetAxisText(ref Graphics objGraphics)
{
// float fltX = Width - XSpace + XSlice / 2 - (XAxisText.Length -4) * intFontSpace;
float fltX = Width - XSlice / 2-(XAxisText.Length - 1) * intFontSpace;
float fltY = Height - YSpace - intFontSpace;
objGraphics.DrawString(XAxisText, new Font("宋体",FontSize), new SolidBrush(AxisTextColor), fltX, fltY);
fltX = XSpace - 20;
fltY = YSpace - YSlice / 2 - intFontSpace;
//for (int i = 0; i < YAxisText.Length; i++)
//{
// objGraphics.DrawString(YAxisText[i].ToString(), new Font("宋体", FontSize), new SolidBrush(AxisTextColor), fltX, fltY);
// fltY += intFontSpace;//字体上下距离
//}
objGraphics.DrawString(YAxisText, new Font("宋体", FontSize), new SolidBrush(AxisTextColor), fltX, fltY);
}
///<summary>
///初始化X轴上的刻度和文字
///</summary>
///<paramname="objGraphics"></param>
private void SetXAxis(ref Graphics objGraphics)
{
if (Keys.Length == 0)
return;
float fltX1 = XSpace;
float fltY1 = Height - YSpace;
float fltX2 = XSpace;
float fltY2 = Height - YSpace;
int iCount = 0;
int iSliceCount = xSliceRate;
float Scale = 0;
//计算X轴刻度宽度
float iWidth = ((Width - 2 * XSpace) / XSlice) * 50;//将要画刻度的长度分段,并乘以50,以10为单位画刻度线。
float fltSliceHeight = XSlice / 10;//刻度线的高度
objGraphics.TranslateTransform(fltX1, fltY1);//平移图像(原点)
objGraphics.RotateTransform(XRotateAngle, MatrixOrder.Prepend);//旋转图像
objGraphics.DrawString(Keys[0].ToString(), new Font("宋体", FontSize), new SolidBrush(SliceTextColor), 0, 0);
objGraphics.ResetTransform();//重置图像
for (int i = 0; i <= iWidth; i += 10)//以10为单位
{
Scale = i * XSlice / 50;//即(i/10)*(XSlice/5),将每个刻度分五部分画,但因为i以10为单位,得除以10
if (iCount == 5)
{
objGraphics.DrawLine(new Pen(new SolidBrush(AxisColor)), fltX1 + Scale, fltY1 + fltSliceHeight * 1.5f, fltX2 + Scale, fltY2 - fltSliceHeight * 1.5f);
//画网格虚线
Pen penDashed = new Pen(new SolidBrush(AxisColor));
penDashed.DashStyle = DashStyle.Dash;
objGraphics.DrawLine(penDashed, fltX1 + Scale, fltY1, fltX2 + Scale, YSpace - YSlice / 2);
//这里显示X轴刻度
if (iSliceCount <= Keys.Length - 1)
{
objGraphics.TranslateTransform(fltX1 + Scale, fltY1);
objGraphics.RotateTransform(XRotateAngle, MatrixOrder.Prepend);
objGraphics.DrawString(Keys[iSliceCount].ToString(), new Font("宋体", FontSize), new SolidBrush(SliceTextColor), 0, 0);
Console.WriteLine(Keys[iSliceCount]);
objGraphics.ResetTransform();
}
else
{
//超过范围,不画任何刻度文字
}
iCount = 0;
iSliceCount += xSliceRate;
if (fltX1 + Scale > Width - XSpace)
{
break;
}
}
else
{
objGraphics.DrawLine(new Pen(new SolidBrush(SliceColor)), fltX1 + Scale, fltY1 + fltSliceHeight, fltX2 + Scale, fltY2 - fltSliceHeight);
}
iCount++;
}
}
///<summary>
///初始化Y轴上的刻度和文字
///</summary>
///<paramname="objGraphics"></param>
private void SetYAxis(ref Graphics objGraphics)
{
float fltX1 = XSpace;
float fltY1 = Height - YSpace;
float fltX2 = XSpace;
float fltY2 = Height - YSpace;
int iCount = 0;
float Scale = 0;
int iSliceCount = 1;
float iHeight = ((Height - 2 * YSpace) / YSlice) * 50;//将要画刻度的长度分段,并乘以50,以10为单位画刻度线。
float fltSliceWidth = YSlice / 10;//刻度线的宽度
string strSliceText = string.Empty;
objGraphics.TranslateTransform(XSpace - intFontSpace * YSliceBegin.ToString().Length, Height - YSpace);//平移图像(原点)
objGraphics.RotateTransform(YRotateAngle, MatrixOrder.Prepend);//旋转图像
objGraphics.DrawString(YSliceBegin.ToString(), new Font("宋体", FontSize), new SolidBrush(SliceTextColor), -2, -5);
objGraphics.ResetTransform();//重置图像
for (int i = 0; i <= iHeight; i += 10)
{
Scale = i * YSlice / 50;//即(i/10)*(YSlice/5),将每个刻度分五部分画,但因为i以10为单位,得除以10
if (iCount == 5)
{
objGraphics.DrawLine(new Pen(new SolidBrush(AxisColor)), fltX1 - fltSliceWidth * 1.5f, fltY1 - Scale, fltX2 + fltSliceWidth * 1.5f, fltY2 - Scale);
//画网格虚线
Pen penDashed = new Pen(new SolidBrush(AxisColor));
penDashed.DashStyle = DashStyle.Dash;
objGraphics.DrawLine(penDashed, XSpace, fltY1 - Scale, Width - XSpace + XSlice / 2, fltY2 - Scale);
//这里显示Y轴刻度
strSliceText = Convert.ToString(YSliceValue * iSliceCount + YSliceBegin);
objGraphics.TranslateTransform(XSpace - intFontSize * strSliceText.Length-5, fltY1 - Scale-5);//平移图像(原点)
objGraphics.RotateTransform(YRotateAngle, MatrixOrder.Prepend);//旋转图像
objGraphics.DrawString(strSliceText, new Font("宋体", FontSize), new SolidBrush(SliceTextColor), 0, 0);
objGraphics.ResetTransform();//重置图像
iCount = 0;
iSliceCount++;
}
else
{
objGraphics.DrawLine(new Pen(new SolidBrush(SliceColor)), fltX1 - fltSliceWidth, fltY1 - Scale, fltX2 + fltSliceWidth, fltY2 - Scale);
}
iCount++;
}
}
///<summary>
///画曲线
///</summary>
///<paramname="objGraphics"></param>
private void DrawContent(ref Graphics objGraphics, float[] fltCurrentValues, Color clrCurrentColor)
{
if (Keys.Length == 0)
return;
Pen CurvePen = new Pen(clrCurrentColor, CurveSize);
// PointF[] CurvePointF = new PointF[Keys.Length];
float keys = 0;
float values = 0;
//for (int i = 0; i < Keys.Length; i++)
//{
// keys = XSlice * i + XSpace;
// values = (Height - YSpace) + YSliceBegin - YSlice * (fltCurrentValues[i] / YSliceValue);
// CurvePointF[i] = new PointF(keys, values);
//}
int lenValue = fltCurrentValues.Length;
int lenKey = Keys.Length;
float xSlicei = XSlice / xSliceRate / (lenValue / lenKey);
// float YValueLen = (Height - YSpace) + YSliceBegin;
float YValueLen = (Height - YSpace);
float rate = YSlice / YSliceValue;
List<PointF> curvePointF = new List<PointF>();
int valueNum = 0;
for (int i = 0; i < lenValue; i++)
{
keys = xSlicei * i + XSpace;
if (fltCurrentValues[i] == null || fltCurrentValues[i].Equals(float.NaN))
{
// CurvePointF[i] = new PointF(keys, 0);
}
else
{
values = YValueLen - rate * (fltCurrentValues[i] - YSliceBegin);
// CurvePointF[i] = new PointF(keys, values);
curvePointF.Add(new PointF(keys, values));
valueNum++;
}
}
try
{
if (valueNum == 0)
objGraphics.DrawString("暂无数据!", new Font("宋体", 14), Brushes.Black, Width / 2 - 56, Height / 2 - 14);
objGraphics.DrawCurve(CurvePen, curvePointF.ToArray(), Tension);
}
catch { }
}
///<summary>
///初始化标题
///</summary>
///<paramname="objGraphics"></param>
private void CreateTitle(ref Graphics objGraphics)
{
// objGraphics.DrawString(Title, new Font("宋体", FontSize), new SolidBrush(TextColor), new Point((int)(Width - XSpace) - intFontSize * Title.Length, (int)(YSpace - YSlice / 2 - intFontSpace)));
objGraphics.DrawString(Title, new Font("宋体", FontSize), new SolidBrush(TextColor), new Point((int)(Width - XSpace) - intFontSize * Title.Length, 4));
}
}