using System;
using System.Collections;
using System.Drawing;
using System.Drawing.Imaging;

namespace Ktest
{
 /// <summary>
 /// Kbuilder 的摘要说明。
 /// </summary>
 public class Kbuilder
 {
  private int bottomMarge=10;
  private int leftMarge=20;
  /// <summary>
  /// 默认宽度
  /// </summary>
  private int m_width=640;
  /// <summary>
  /// 高度默认400像素
  /// </summary>
  private int m_height=480;
  /// <summary>
  /// 默认显示30天数据
  /// </summary>
  private int m_lineCount=30;
  /// <summary>
  /// 默认显示的最高价50元
  /// </summary>
  private int m_maxPrice=50;
  /// <summary>
  /// 存放价格表
  /// </summary>
  private ArrayList m_prices;
 
  public Kbuilder()
  {
   m_prices=new ArrayList();
  }
  /// <summary>
  /// 宽度
  /// </summary>
  public int Width
  {
   get
   {
    return m_width;
   }
   set
   {
    m_width=value;
   }
  }
  /// <summary>
  /// 高度
  /// </summary>
  public int Height
  {
   get
   {
    return m_height;
   }
   set
   {
    m_height=value;
   }
  }
  /// <summary>
  /// 显示线数
  /// </summary>
  public int LineCount
  {
   get
   {
    return m_lineCount;
   }
   set
   {
    m_lineCount=value;
   }
  }
  public int MaxPrice
  {
   get
   {
    return m_maxPrice;
   }
   set
   {
    m_maxPrice=value;
   }
  }
  /// <summary>
  /// 添加价格
  /// </summary>
  /// <param name="openPrice">开盘价</param>
  /// <param name="maxPrice">最高价</param>
  /// <param name="minPrice">最低价</param>
  /// <param name="closePrice">收盘价</param>
  public void Add(double openPrice,double maxPrice,double minPrice,double closePrice)
  {
   Ktest.Price a=new Price();
   a.Open=openPrice;
   a.Max=maxPrice;
   a.Min=minPrice;
   a.Close=closePrice;
   if (m_prices.Count>=m_lineCount)
   {
    m_prices.RemoveAt(0);
   }
   m_prices.Add(a);   
  }
  /// <summary>
  /// 画图
  /// </summary>
  /// <returns></returns>
  public Bitmap GetImage()
  {
   Bitmap image = new Bitmap(m_width,m_height);
   Graphics g = Graphics.FromImage(image);
   
   Pen black1=new Pen(Color.Black,1);
   Pen black2=new Pen(Color.Black,2);
   Pen red=new Pen(Color.Red,1);

   Point o=new Point(leftMarge,m_height-bottomMarge);
   Point y=new Point(leftMarge,0);
   Point x=new Point(m_width,m_height-bottomMarge);
   Font font=new Font("宋体",8);
   
   int hStep=(m_height-bottomMarge)/m_maxPrice;
   int wStep=(m_width-leftMarge)/m_lineCount;

   g.Clear(Color.White);
   g.DrawLine(black2,y,o);
   g.DrawLine(black2,o,x);
   for(int i=1;i<=m_maxPrice;i++)
   {
    g.DrawString(i.ToString(),font,Brushes.Black,1,m_height-bottomMarge-hStep*i);
   }
   for(int i=1;i<=m_lineCount;i++)
   {
    g.DrawString(i.ToString(),font,Brushes.Black,wStep*i,m_height-bottomMarge+1);
   }
   g.Save();
   int iCount=0;
   foreach(Price p in m_prices)
   {
    int x1,x2,x3,y1,y2,y3,y4;
    x1=leftMarge+iCount*wStep+3;
    x2=x1-3+(int)wStep/2;
    x3=(leftMarge+wStep*iCount++)-2;
    y1=m_height-bottomMarge-(int)p.Max*hStep;
    y4=m_height-bottomMarge-(int)p.Min*hStep;
    System.Drawing.Brush brush;
    Pen curPen;
    if (p.Positive)
    {
     curPen=red;
     brush=System.Drawing.Brushes.Red;
     y3=m_height-bottomMarge-(int)p.Open*hStep;
     y2=m_height-bottomMarge-(int)p.Close*hStep;
    }
    else
    {
     curPen=black1;
     brush=System.Drawing.Brushes.Black;
     y2=m_height-bottomMarge-(int)p.Open*hStep;
     y3=m_height-bottomMarge-(int)p.Close*hStep;
    }
    g.FillRectangle(brush,x1,y2,wStep-5,y3-y2);
    g.DrawLine(curPen,x2,y1,x2,y4);
   }
   return image;
  }
 }
}