sar.java

一份java写的期货交易程序

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   SAR.java

package gnnt.MEBS.HQApplet.Indicator;

import gnnt.MEBS.HQApplet.*;
import java.awt.*;

// Referenced classes of package gnnt.MEBS.HQApplet.Indicator:
//            KLine, IndicatorBase, IndicatorPos

public class SAR extends KLine
{

    private final int m_iParam[] = {
        5
    };
    private final int SAR_UP = 0;
    private final int SAR_DOWN = 1;
    private final int SAR_CUP = 16;
    private final int SAR_CDOWN = 17;

    public SAR(IndicatorPos pos, int iPrecision)
    {
        super(pos, 0, iPrecision);
        m_strIndicatorName = "SAR(" + m_iParam[0] + ")";
        m_strParamName = (new String[] {
            ""
        });
    }

    public void Paint(Graphics g, Rectangle rc, KLineData data[])
    {
        m_kData = data;
        Calculate();
        super.Paint(g, rc, data);
        Color color[] = {
            HQApplet.rhColor.clIncrease, HQApplet.rhColor.clDecrease, HQApplet.rhColor.clEqual
        };
        DrawSAR(g, m_iParam[0] - 1, m_data[0], m_data[1], color);
    }

    public void Calculate()
    {
        int n = m_iParam[0];
        m_data = new float[2][];
        if(m_kData == null || m_kData.length <= 0)
            return;
        if(n > m_kData.length || n < 3)
            return;
        for(int i = 0; i < 2; i++)
            m_data[i] = new float[m_kData.length];

        float sar[] = m_data[0];
        float sign[] = m_data[1];
        float xs = 0.02F;
        if(m_kData[n - 1].closePrice < m_kData[n - 2].closePrice)
        {
            if(m_kData[n - 2].closePrice <= m_kData[n - 3].closePrice)
                sign[n - 1] = 1.0F;
            else
                sign[n - 1] = 17F;
        } else
        if(m_kData[n - 1].closePrice > m_kData[n - 2].closePrice)
        {
            if(m_kData[n - 2].closePrice >= m_kData[n - 3].closePrice)
                sign[n - 1] = 0.0F;
            else
                sign[n - 1] = 16F;
        } else
        if(m_kData[n - 2].closePrice < m_kData[n - 3].closePrice)
            sign[n - 1] = 1.0F;
        else
        if(m_kData[n - 2].closePrice > m_kData[n - 3].closePrice)
            sign[n - 1] = 0.0F;
        else
            sign[n - 1] = 16F;
        if(sign[n - 1] == 1.0F || sign[n - 1] == 17F)
        {
            sar[n - 1] = -1E+036F;
            for(int j = n - 1; j >= 0; j--)
                sar[n - 1] = Math.max(sar[n - 1], m_kData[j].highPrice);

        } else
        {
            sar[n - 1] = 1E+036F;
            for(int j = n - 1; j >= 0; j--)
                sar[n - 1] = Math.min(sar[n - 1], m_kData[j].lowPrice);

        }
        for(int i = n; i < m_kData.length; i++)
            if(sign[i - 1] == 0.0F || sign[i - 1] == 16F)
            {
                if(m_kData[i].closePrice < sar[i - 1])
                {
                    sar[i] = -1E+036F;
                    for(int j = i; j > i - n; j--)
                        sar[i] = Math.max(sar[i], m_kData[j].highPrice);

                    sign[i] = 17F;
                    xs = 0.02F;
                } else
                {
                    sar[i] = sar[i - 1] + xs * (m_kData[i - 1].highPrice - sar[i - 1]);
                    xs = xs >= 0.2F ? xs : xs + 0.02F;
                    sign[i] = 0.0F;
                }
            } else
            if(m_kData[i].closePrice > sar[i - 1])
            {
                sar[i] = 1E+036F;
                for(int j = i; j > i - n; j--)
                    sar[i] = Math.min(sar[i], m_kData[j].lowPrice);

                sign[i] = 16F;
                xs = 0.02F;
            } else
            {
                sar[i] = sar[i - 1] + xs * (m_kData[i - 1].lowPrice - sar[i - 1]);
                xs = xs >= 0.2F ? xs : xs + 0.02F;
                sign[i] = 1.0F;
            }

    }

    protected void GetMaxMin()
    {
        super.GetMaxMin();
        GetValueMaxMin(m_data[0], m_iParam[0]);
        if(m_rc.height > m_iTextH)
        {
            float temp = m_max - m_min;
            m_max += ((m_pos.m_Ratio / 2.0F) * temp) / (float)(m_rc.height - m_iTextH);
            m_min -= ((m_pos.m_Ratio / 2.0F) * temp) / (float)(m_rc.height - m_iTextH);
        }
    }

    private void DrawSAR(Graphics g, int iBegin, float data[], float sign[], Color color[])
    {
        if(data == null || sign == null)
            return;
        Rectangle rect = new Rectangle(m_rc.x, m_rc.y + m_iTextH, m_rc.width, m_rc.height - m_iTextH);
        if(m_max - m_min == 0.0F || rect.height <= 0)
            return;
        int begin = m_pos.m_Begin >= iBegin ? m_pos.m_Begin : iBegin;
        float valuex = (float)rect.x + (float)(begin - m_pos.m_Begin) * m_pos.m_Ratio;
        float valuey = (m_max - m_min) / (float)rect.height;
        for(int i = begin; i <= m_pos.m_End; i++)
        {
            float value = (float)rect.y + (m_max - data[i]) / valuey;
            if(sign[i] == 1.0F)
                g.setColor(color[1]);
            else
            if(sign[i] == 0.0F)
                g.setColor(color[0]);
            else
                g.setColor(color[2]);
            int x1 = (int)valuex;
            int y1 = (int)(value - m_pos.m_Ratio / 2.0F);
            int x2 = (int)(valuex + m_pos.m_Ratio);
            int y2 = (int)(value + m_pos.m_Ratio / 2.0F);
            g.drawArc(x1, y1, x2 - x1, y2 - y1, 0, 360);
            valuex += m_pos.m_Ratio;
        }

    }
}