I have the following sample app :
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
import org.jfree.chart.*;
import org.jfree.chart.annotations.*;
import org.jfree.chart.axis.*;
import org.jfree.chart.entity.*;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYBarRenderer;
import org.jfree.data.time.*;
import org.jfree.data.xy.XYDataset;
import org.jfree.chart.labels.*;
import org.jfree.chart.panel.*;
import org.jfree.chart.plot.*;
import org.jfree.chart.renderer.xy.*;
import org.jfree.chart.ui.*;
public class PriceVolume_Chart extends JPanel implements ChartMouseListener // A demo application for price-volume chart.
{
ChartPanel panel;
TimeSeries Price_Series=new TimeSeries("Price");
TimeSeries Volume_Series=new TimeSeries("Volume");
Crosshair xCrosshair,yCrosshair;
Vector<String> Volume_Color_Vector;
XYTextAnnotation note;
XYPlot plot;
XYLineAndShapeRenderer r;
public PriceVolume_Chart(String Symbol,int Index)
{
// super(new GridLayout());
try
{
JFreeChart chart=createChart(Symbol);
panel=new ChartPanel(chart,true,true,true,false,true);
panel.setPreferredSize(new java.awt.Dimension(1000,500));
panel.addChartMouseListener(this);
CrosshairOverlay crosshairOverlay=new CrosshairOverlay();
float[] dash={2f,0f,2f};
BasicStroke bs=new BasicStroke(1,BasicStroke.CAP_BUTT,BasicStroke.JOIN_ROUND,1.0f,dash,2f);
xCrosshair=new Crosshair(Double.NaN,Color.black,bs);
xCrosshair.setLabelBackgroundPaint(new Color(0f,0f,0f,1f));
xCrosshair.setLabelFont(xCrosshair.getLabelFont().deriveFont(14f));
xCrosshair.setLabelPaint(new Color(1f,1f,1f,1f));
xCrosshair.setLabelGenerator(new CrosshairLabelGenerator()
{
@Override
public String generateLabel(Crosshair crosshair)
{
long ms=(long)crosshair.getValue();
TimeSeriesDataItem item=null;
for (int i=0;i<Volume_Series.getItemCount();i++)
{
item=Volume_Series.getDataItem(i);
if (ms==item.getPeriod().getFirstMillisecond()) break;
}
long volume=item.getValue().longValue();
String s=NumberFormat.getInstance().format(volume);
return MessageFormat.format(" Volume: {0} ",s);
}
});
/*
xCrosshair.setLabelGenerator(new StandardCrosshairLabelGenerator()
{
@Override
public String generateLabel(Crosshair crosshair)
{
long ms=(long)crosshair.getValue();
TimeSeriesDataItem item=null;
for (int i=0;i<Volume_Series.getItemCount();i++)
{
item=Volume_Series.getDataItem(i);
if (ms==item.getPeriod().getFirstMillisecond()) break;
}
long volume=item.getValue().longValue();
return " "+NumberFormat.getInstance().format(volume)+" ";
}
});
*/
xCrosshair.setLabelVisible(true);
yCrosshair=new Crosshair(Double.NaN,Color.black,bs);
yCrosshair.setLabelBackgroundPaint(new Color(0f,0f,0f,1f));
yCrosshair.setLabelFont(xCrosshair.getLabelFont().deriveFont(14f));
yCrosshair.setLabelPaint(new Color(1f,1f,1f,1f));
yCrosshair.setLabelGenerator(new StandardCrosshairLabelGenerator(" Price: {0} ",NumberFormat.getCurrencyInstance()));
yCrosshair.setLabelVisible(true);
crosshairOverlay.addDomainCrosshair(xCrosshair);
crosshairOverlay.addRangeCrosshair(yCrosshair);
panel.addOverlay(crosshairOverlay);
add(panel);
/*
if (Index!=-1 && Index<Volume_Series.getItemCount())
{
TimeSeriesDataItem itemX=Volume_Series.getDataItem(Index);
xCrosshair.setValue(itemX.getPeriod().getFirstMillisecond());
TimeSeriesDataItem itemY=Price_Series.getDataItem(Index);
yCrosshair.setValue(itemY.getValue().doubleValue());
TimeSeriesDataItem item=Price_Series.getDataItem(Index);
float time=item.getPeriod().getFirstMillisecond();
float price=item.getValue().floatValue();
SimpleDateFormat f=new SimpleDateFormat("yyyy-MM-d");
String st=" Price : "+f.format(new Date((long)time))+" , "+NumberFormat.getCurrencyInstance().format(price)+" ";
note=new XYTextAnnotation(st,time,price-1);
note.setFont(UIManager.getFont("ToolTip.font"));
note.setBackgroundPaint(UIManager.getColor("ToolTip.background"));
Out("Index = "+Index);
note.setTextAnchor(Index<Volume_Color_Vector.size()/2?TextAnchor.TOP_LEFT:TextAnchor.TOP_RIGHT);
note.setOutlinePaint(Color.blue);
note.setOutlineVisible(true);
plot.getRenderer().addAnnotation(note);
}
*/
}
catch (Exception e) { e.printStackTrace(); }
}
private JFreeChart createChart(String Symbol)
{
createPriceDataset(Symbol);
XYDataset priceData=new TimeSeriesCollection(Price_Series);
JFreeChart chart=ChartFactory.createTimeSeriesChart(Symbol,"Date",getYLabel("Price ( $ )"),priceData,true,true,true);
plot=chart.getXYPlot();
plot.setBackgroundPaint(new Color(192,196,196));
NumberAxis rangeAxis1=(NumberAxis)plot.getRangeAxis();
rangeAxis1.setLowerMargin(0.40); // Leave room for volume bars
plot.getRenderer().setDefaultToolTipGenerator(new StandardXYToolTipGenerator(StandardXYToolTipGenerator.DEFAULT_TOOL_TIP_FORMAT,new SimpleDateFormat("yyyy-MM-d"),NumberFormat.getCurrencyInstance()));
NumberAxis rangeAxis2=new NumberAxis("Volume");
rangeAxis2.setUpperMargin(1.00); // Leave room for price line
rangeAxis2.setNumberFormatOverride(NumberFormat.getNumberInstance());
plot.setRangeAxis(1,rangeAxis2);
plot.setDataset(1,new TimeSeriesCollection(Volume_Series));
plot.setRangeAxis(1,rangeAxis2);
plot.mapDatasetToRangeAxis(1,1);
MyRender Renderer=new MyRender(this);
Renderer.setShadowVisible(false);
plot.setRenderer(1,Renderer);
DateAxis domainAxis=(DateAxis) plot.getDomainAxis(); // Consider adjusting the lower margin of the domain axis for symmetry.
domainAxis.setLowerMargin(0.05);
r=(XYLineAndShapeRenderer)plot.getRenderer();
return chart;
}
private void createPriceDataset(String Symbol)
{
String Lines[]=new String[21],Items[],Date;
int Year, Month, Day;
long Volume,Last_Volume=0;
float Price;
Lines[0]="Date,Open,High,Low,Close,Adj Close,Volume";
Lines[1]="2020-07-17,44.110001,44.369999,41.919998,42.509998,42.323395,849700";
Lines[2]="2020-07-20,41.630001,41.680000,39.669998,40.119999,39.943886,1319300";
Lines[3]="2020-07-21,40.880001,42.860001,40.860001,42.270000,42.084450,2070300";
Lines[4]="2020-07-22,41.919998,42.700001,41.090000,42.570000,42.383133,1317600";
Lines[5]="2020-07-23,43.919998,46.389999,43.279999,44.759998,44.563519,1917700";
Lines[6]="2020-07-24,46.500000,46.500000,43.950001,44.410000,44.215057,1384600";
Lines[7]="2020-07-27,44.000000,44.240002,42.610001,43.860001,43.667469,799800";
Lines[8]="2020-07-28,43.389999,44.590000,42.930000,43.020000,42.831158,699700";
Lines[9]="2020-07-29,42.759998,45.590000,42.740002,45.430000,45.230579,826200";
Lines[10]="2020-07-30,44.160000,44.639999,42.959999,44.500000,44.304661,798100";
Lines[11]="2020-07-31,44.330002,44.419998,42.580002,44.360001,44.165276,1037800";
Lines[12]="2020-08-03,44.560001,45.599998,43.419998,44.939999,44.742729,797000";
Lines[13]="2020-08-04,44.900002,45.500000,43.450001,43.540001,43.348877,971100";
Lines[14]="2020-08-05,44.860001,45.389999,43.650002,45.330002,45.131020,902000";
Lines[15]="2020-08-06,45.049999,46.279999,44.330002,45.299999,45.101147,645200";
Lines[16]="2020-08-07,44.849998,46.189999,44.189999,46.150002,45.947418,604900";
Lines[17]="2020-08-10,46.669998,48.410000,46.549999,47.290001,47.082417,960200";
Lines[18]="2020-08-11,49.110001,50.849998,48.799999,48.910000,48.695301,1187700";
Lines[19]="2020-08-12,49.759998,50.009998,47.060001,47.840000,47.630001,752800";
Lines[20]="2020-08-13,46.950001,48.369999,46.459999,47.110001,47.110001,535700";
Volume_Color_Vector=new Vector();
for (int i=1;i<Lines.length;i++)
{
Items=Lines[i].split(",");
Date=Items[0].replace("-0","-");
Price=Float.parseFloat(Items[5]);
Volume=Long.parseLong(Items[6]);
Items=Date.split("-");
Year=Integer.parseInt(Items[0]);
Month=Integer.parseInt(Items[1]);
Day=Integer.parseInt(Items[2]);
Price_Series.add(new Day(Day,Month,Year),Price);
Volume_Series.add(new Day(Day,Month,Year),Volume);
Volume_Color_Vector.add(Volume>=Last_Volume?"+":"-");
Last_Volume=Volume;
}
}
@Override
public void chartMouseClicked(ChartMouseEvent e)
{
Out("x = "+e.getTrigger().getX()); // Find X pixel location by mouse click
}
public int getX(int index) // Find X pixel location by date index : In this example : index = 0 points to "2020-07-17"
{
int X=-999;
Out("X = "+X);
return X;
}
public int getX(String date) // Find X pixel location by date string : For example "2020-08-03"
{
int X=-999;
Out("X = "+X);
return X;
}
public void chartMouseMoved(ChartMouseEvent cmevent)
{
ChartEntity chartentity=cmevent.getEntity();
if (chartentity instanceof XYItemEntity)
{
if (!r.getAnnotations().isEmpty()) r.removeAnnotation(note);
XYItemEntity e=(XYItemEntity)chartentity;
XYDataset d=e.getDataset();
int s=e.getSeriesIndex();
int i=e.getItem();
double x=d.getXValue(s,i);
double y=d.getYValue(s,i);
// Out("x = "+x+" y = "+y);
xCrosshair.setValue(x);
yCrosshair.setValue(y);
}
}
String getYLabel(String Text)
{
String Result="";
for (int i=0;i<Text.length();i++) Result+=Text.charAt(i)+(i<Text.length()-1?"u2009":"");
// Out(Result);
return Result;
}
private static void out(String message) { System.out.print(message); }
private static void Out(String message) { System.out.println(message); }
// Create the GUI and show it. For thread safety, this method should be invoked from the event-dispatching thread.
static void Create_And_Show_GUI()
{
final PriceVolume_Chart demo=new PriceVolume_Chart("ADS",10);
JFrame frame=new JFrame("PriceVolume_Chart Frame");
frame.add(demo);
frame.addWindowListener(new WindowAdapter()
{
public void windowActivated(WindowEvent e) { }
public void windowClosed(WindowEvent e) { }
public void windowClosing(WindowEvent e) { System.exit(0); }
public void windowDeactivated(WindowEvent e) { }
public void windowDeiconified(WindowEvent e) { demo.repaint(); }
public void windowGainedFocus(WindowEvent e) { demo.repaint(); }
public void windowIconified(WindowEvent e) { }
public void windowLostFocus(WindowEvent e) { }
public void windowOpening(WindowEvent e) { demo.repaint(); }
public void windowOpened(WindowEvent e) { }
public void windowResized(WindowEvent e) { demo.repaint(); }
public void windowStateChanged(WindowEvent e) { demo.repaint(); }
});
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args)
{
// Schedule a job for the event-dispatching thread : creating and showing this application's GUI.
SwingUtilities.invokeLater(new Runnable() { public void run() { Create_And_Show_GUI(); } });
}
}
class MyRender extends XYBarRenderer
{
PriceVolume_Chart PVC;
MyRender(PriceVolume_Chart PVC)
{
this.PVC=PVC;
}
@Override
public Paint getItemPaint(int row,int col)
{
this.setBarAlignmentFactor(0.5);
// System.out.println(row+" "+col+" "+super.getItemPaint(row,col));
return PVC.Volume_Color_Vector.elementAt(col).equals("+")?super.getItemPaint(row,col):new Color(0.56f,0.2f,0.5f,1f);
}
}
How to implement the 2 “getX()” methods above, so they will return the X pixel values by inputting date index or date string ?
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Answer
Given a ChartPanel, seen here, the following method finds the index item in the priceSeries and converts its time to Java2D coordinates relative to the chart.
public int getX(int index) {
Rectangle2D dataArea = chartPanel.getScreenDataArea();
RectangleEdge xAxisLocation = xyPlot.getDomainAxisEdge();
DateAxis domainAxis = (DateAxis) xyPlot.getDomainAxis();
TimeSeriesDataItem item = priceSeries.getDataItem(index);
long t = item.getPeriod().getFirstMillisecond();
double x = domainAxis.valueToJava2D(t, dataArea, xAxisLocation);
return (int) x;
}
The TimeSeries method getIndex() can be used to find the the index of a TimeSeriesDataItem having the RegularTimePeriod corresponding to a given date string; the resulting index can be passed to getX(int index).
public int getX(String date) {
RegularTimePeriod period = null;
try {
period = new Day(DATE_FORMAT.parse(date));
} catch (ParseException ex) {
ex.printStackTrace(System.err);
}
return getX(priceSeries.getIndex(period));
}
Add a line like this to the chartMouseMoved handler to see the correspondence between coordinates:
System.out.println(event.getTrigger().getX() + " " + getX(i)
+ " " + getX(DATE_FORMAT.format(new Date((long) x))));