/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package org.chartsy.aroon;
import com.tictactec.ta.lib.Core;
import com.tictactec.ta.lib.MInteger;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Stroke;
import java.text.DecimalFormat;
import java.util.LinkedHashMap;
import org.chartsy.main.ChartFrame;
import org.chartsy.main.chart.Indicator;
import org.chartsy.main.data.DataItem;
import org.chartsy.main.data.Dataset;
import org.chartsy.main.utils.DefaultPainter;
import org.chartsy.main.utils.Range;
import org.chartsy.main.utils.SerialVersion;
import org.chartsy.talib.TaLibInit;
import org.chartsy.talib.TaLibUtilities;
import org.openide.nodes.AbstractNode;
/**
*
* @author joshua.taylor
*/
public class Aroon extends Indicator
{
private static final long serialVersionUID = SerialVersion.APPVERSION;
public static final String FULL_NAME = "Aroon";
public static final String UP_TREND_HASHKEY = "upline";
public static final String DOWN_TREND_HASHKEY = "downline";
private IndicatorProperties properties;
//variables for TA-Lib utilization
private int lookback;
private double[] outputDown;
private double[] outputUp;
private transient MInteger outBegIdx;
private transient MInteger outNbElement;
private transient Core core;
//variables specific to this indicator
private int period;
private double[] allHighs;
private double[] allLows;
//the next variable is used for holding the new calculated data
private Dataset calculatedDatasetUp;
private Dataset calculatedDatasetDown;
public Aroon()
{
super();
properties = new IndicatorProperties();
}
public String getName()
{ return FULL_NAME; }
public String getLabel()
{ return properties.getLabel()+ " (" + properties.getPeriod() + ")"; }
public String getPaintedLabel(ChartFrame cf)
{ return getLabel(); }
public Indicator newInstance(){ return new Aroon(); }
@Override
public boolean hasZeroLine(){ return false; }
@Override
public boolean getZeroLineVisibility(){ return false; }
@Override
public Color getZeroLineColor(){ return null; }
@Override
public Stroke getZeroLineStroke() {return null; }
public boolean hasDelimiters(){ return true; }
public boolean getDelimitersVisibility(){ return true; }
public double[] getDelimitersValues(){ return new double[] {30d, 50d, 70d}; }
public Color getDelimitersColor(){ return properties.getDelimiterColor(); }
public Stroke getDelimitersStroke(){ return properties.getDelimiterLineStroke(); }
public Color[] getColors(){ return new Color[] {properties.getUpTrendColor(), properties.getDownTrendColor()}; }
public boolean getMarkerVisibility(){ return properties.getMarker(); }
public AbstractNode getNode(){ return new IndicatorNode(properties); }
@Override
public Double[] getPriceValues(ChartFrame cf)
{ return new Double[] {new Double(30), new Double(50), new Double(70)}; }
public LinkedHashMap getHTML(ChartFrame cf, int i)
{
LinkedHashMap ht = new LinkedHashMap();
DecimalFormat df = new DecimalFormat("#,##0.00");
double[] values = getValues(cf, i);
String[] labels = {"Aroon Up:", "Aroon Down:"};
ht.put(getLabel(), " ");
if (values.length > 0)
{
Color[] colors = getColors();
for (int j = 0; j < values.length; j++)
{
ht.put(getFontHTML(colors[j], labels[j]), getFontHTML(colors[j], df.format(values[j])));
}
}
return ht;
}
@Override
public Range getRange(ChartFrame cf)
{ return new Range(0, 100); }
public void paint(Graphics2D g, ChartFrame cf, Rectangle bounds)
{
Dataset upTrend = visibleDataset(cf, UP_TREND_HASHKEY);
Dataset downTrend = visibleDataset(cf, DOWN_TREND_HASHKEY);
if (upTrend != null && downTrend != null)
{
if (maximized)
{
Range range = getRange(cf);
DefaultPainter.line(g, cf, range, bounds, upTrend, properties.getUpTrendColor(), properties.getUpTrendLineStroke()); // paint the signal
DefaultPainter.line(g, cf, range, bounds, downTrend, properties.getDownTrendColor(), properties.getDownTrendLineStroke()); // paint the MACD
}
}
}
public double[] getValues(ChartFrame cf)
{
Dataset upTrend = visibleDataset(cf, UP_TREND_HASHKEY);
Dataset downTrend = visibleDataset(cf, DOWN_TREND_HASHKEY);
double[] values = new double[2];
if(upTrend != null && downTrend != null){
values[0] = upTrend.getLastClose();
values[1] = downTrend.getLastClose();
}
else
return new double[] {,};
return values;
}
public double[] getValues(ChartFrame cf, int i)
{
Dataset upTrend = visibleDataset(cf, UP_TREND_HASHKEY);
Dataset downTrend = visibleDataset(cf, DOWN_TREND_HASHKEY);
double[] values = new double[2];
if(upTrend != null && downTrend != null){
values[0] = upTrend.getDataItem(i) != null ? upTrend.getCloseAt(i) : 0;
values[1] = downTrend.getDataItem(i) != null ? downTrend.getCloseAt(i) : 0;
}
else
return new double[] {,};
return values;
}
public void calculate()
{
Dataset initial = getDataset();
int count = 0;
if (initial != null && !initial.isEmpty())
count = initial.getItemsCount();
/**********************************************************************/
//This entire method is basically a copy/paste action into your own
//code. The only thing you have to change is the next few lines of code.
//Choose the 'lookback' method and appropriate 'calculation function'
//from TA-Lib for your needs. Everything else should stay basically the
//same
//prepare ta-lib variables
outputDown = new double[count];
outputUp = new double[count];
outBegIdx = new MInteger();
outNbElement = new MInteger();
core = TaLibInit.getCore();//needs to be here for serialization issues
//[your specific indicator variables need to be set first]
period = properties.getPeriod();
allHighs = initial.getHighValues();//new double[count];
allLows = initial.getLowValues();//new double[count];
//now do the calculation over the entire dataset
//[First, perform the lookback call if one exists]
//[Second, do the calculation call from TA-lib]
lookback = core.aroonLookback(period);
core.aroon(0, count-1, allHighs, allLows, period, outBegIdx, outNbElement, outputDown, outputUp);
//Everything between the /***/ lines is what needs to be changed.
//Everything else remains the same. You are done with your part now.
/**********************************************************************/
//fix the output array's structure. TA-Lib does NOT match
//indicator index and dataset index automatically. That's what
//this function does for us.
outputDown = TaLibUtilities.fixOutputArray(outputDown, lookback);
outputUp = TaLibUtilities.fixOutputArray(outputUp, lookback);
calculatedDatasetUp = Dataset.EMPTY(initial.getItemsCount());
for (int i = 0; i < outputUp.length; i++)
calculatedDatasetUp.setDataItem(i, new DataItem(initial.getTimeAt(i), outputUp[i]));
calculatedDatasetDown = Dataset.EMPTY(initial.getItemsCount());
for (int i = 0; i < outputDown.length; i++)
calculatedDatasetDown.setDataItem(i, new DataItem(initial.getTimeAt(i), outputDown[i]));
addDataset(UP_TREND_HASHKEY, calculatedDatasetUp);
addDataset(DOWN_TREND_HASHKEY, calculatedDatasetDown);
}
}