Width of item in second series too wide

Question

I am trying to show 2 OHLCSeries in one chart/seriesCollection. The first series seems to be OK but in the secord there are item(s) with weird width. Look the pic:

enter image description here

Maybe the problem comes from count of item in series - 1st series has 20 items and the 2nd series just 1.

Here is the complete app code:

import java.awt.Dimension;
import java.text.SimpleDateFormat;
import javax.swing.JFrame;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.AxisLocation;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.DateTickMarkPosition;
import org.jfree.chart.axis.DateTickUnit;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.xy.CandlestickRenderer;
import org.jfree.data.time.Minute;
import org.jfree.data.time.ohlc.OHLCSeries;
import org.jfree.data.time.ohlc.OHLCSeriesCollection;

public class sample8 {

    private ChartPanel chartPanel;
    private JFreeChart chart;
    private final OHLCSeriesCollection seriesCollection = new OHLCSeriesCollection();

    public sample8() {
        chart = ChartFactory.createCandlestickChart(null, "Time", "Price", seriesCollection, false);
        chart.getXYPlot().setOrientation(PlotOrientation.VERTICAL);
        chart.setAntiAlias(false);

        // renderer
        CandlestickRenderer renderer = new CandlestickRenderer();
        chart.getXYPlot().setRenderer(renderer);

        // Y-axis
        chart.getXYPlot().setRangeAxisLocation(AxisLocation.TOP_OR_RIGHT);
        NumberAxis numberAxis = (NumberAxis) chart.getXYPlot().getRangeAxis();
        numberAxis.setAutoRangeIncludesZero(false);
        numberAxis.setAutoRangeStickyZero(false);

        // X-axis
        DateAxis dateAxis = (DateAxis) chart.getXYPlot().getDomainAxis();
        dateAxis.setDateFormatOverride(new SimpleDateFormat("HH:mm"));
        dateAxis.setTickUnit(new DateTickUnit(DateTickUnit.MINUTE, 1), true, true);
        dateAxis.setTickMarkPosition(DateTickMarkPosition.MIDDLE);

        // chartPanel
        chartPanel = new ChartPanel(chart);
        chartPanel.getChartRenderingInfo().setEntityCollection(null);
        chartPanel.setPreferredSize(new Dimension(1000, 500));

        // series
        addSeries1();
        addSeries2();
    }

    private void addSeries1() {
        OHLCSeries series = new OHLCSeries("");
        series.add(new Minute(0, 12, 1, 1, 2014), 97.23D, 98.47D, 97.15D, 97.43);
        series.add(new Minute(1, 12, 1, 1, 2014), 96.47D, 98.81D, 96.27D, 97.49);
        series.add(new Minute(2, 12, 1, 1, 2014), 95.88D, 96.87D, 96.11D, 96.75);
        series.add(new Minute(3, 12, 1, 1, 2014), 96.05D, 96.94D, 95.89D, 96.59);
        series.add(new Minute(4, 12, 1, 1, 2014), 95.92D, 97.00D, 95.69D, 96.92);
        series.add(new Minute(5, 12, 1, 1, 2014), 96.34D, 96.71D, 95.68D, 96.70);
        series.add(new Minute(6, 12, 1, 1, 2014), 96.65D, 96.87D, 94.91D, 96.38);
        series.add(new Minute(7, 12, 1, 1, 2014), 97.75D, 98.20D, 96.90D, 97.24);
        series.add(new Minute(8, 12, 1, 1, 2014), 97.72D, 98.47D, 97.35D, 97.64);
        series.add(new Minute(9, 12, 1, 1, 2014), 98.30D, 98.77D, 97.56D, 97.99);
        series.add(new Minute(10, 12, 1, 1, 2014), 100.09D, 99.79D, 99.17D, 99.25);
        series.add(new Minute(11, 12, 1, 1, 2014), 100.39D, 100.24D, 99.66D, 100.13);
        series.add(new Minute(12, 12, 1, 1, 2014), 97.99D, 98.63D, 97.67D, 98.54);
        series.add(new Minute(13, 12, 1, 1, 2014), 99.33D, 99.37D, 97.96D, 98.34);
        series.add(new Minute(14, 12, 1, 1, 2014), 98.00D, 98.16D, 97.17D, 97.52);
        series.add(new Minute(15, 12, 1, 1, 2014), 98.77D, 97.92D, 97.37D, 97.70);
        series.add(new Minute(16, 12, 1, 1, 2014), 97.33D, 97.94D, 97.15D, 97.67);
        series.add(new Minute(17, 12, 1, 1, 2014), 99.59D, 98.33D, 97.89D, 98.22);
        series.add(new Minute(18, 12, 1, 1, 2014), 96.67D, 97.09D, 95.66D, 97.07);
        series.add(new Minute(19, 12, 1, 1, 2014), 96.65D, 97.58D, 96.79D, 97.00);
        seriesCollection.addSeries(series);
    }

    private void addSeries2() {
        OHLCSeries series = new OHLCSeries("");
        series.add(new Minute(0, 12, 1, 1, 2014), 96D, 96.5D, 95.5D, 96.2D);
        seriesCollection.addSeries(series);
    }

    public ChartPanel getChartPanel() {
        return chartPanel;
    }

    public static void main(String[] args) {
        sample8 app = new sample8();
        JFrame frame = new JFrame("sample8");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel panel = new JPanel();
        panel.add(app.getChartPanel());
        frame.add(panel);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

Why JFreeChart doesn't set width of items automatically the same for all?

OT: `DateTickUnit` is deprecated. – Catalina Island Dec 22 '14 at 11:40 — Catalina Island, Dec 22 '14 at 11:40

score 3 · Answer 1 · edited May 23 '17 at 12:20

You may want to experiment with setAutoWidthMethod() and WIDTHMETHOD_SMALLEST. Two items appear to be a minimum; five are shown below in series "Two".

CandlestickRenderer r = (CandlestickRenderer) chart.getXYPlot().getRenderer();
r.setAutoWidthMethod(CandlestickRenderer.WIDTHMETHOD_SMALLEST);

enter image description here

In addition,

Swing GUI objects should be constructed and manipulated only on the event dispatch thread.
Don't use setPreferredSize() when you really mean to override getPreferredSize(), as discussed here.
As noted here, DateTickUnit is deprecated; use DateTickUnitType instead.

As tested:

import java.awt.Dimension;
import java.awt.EventQueue;
import java.text.SimpleDateFormat;
import javax.swing.JFrame;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.DateTickMarkPosition;
import org.jfree.chart.axis.DateTickUnit;
import org.jfree.chart.axis.DateTickUnitType;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.xy.CandlestickRenderer;
import org.jfree.data.time.Minute;
import org.jfree.data.time.ohlc.OHLCSeries;
import org.jfree.data.time.ohlc.OHLCSeriesCollection;

/** @see https://stackoverflow.com/a/27611246/230513 */
public class Sample8 {

    private final ChartPanel chartPanel;
    private final OHLCSeriesCollection seriesCollection = new OHLCSeriesCollection();

    public Sample8() {
        JFreeChart chart = ChartFactory.createCandlestickChart(
                "Sample8", "Time", "Price", seriesCollection, true);
        chart.getXYPlot().setOrientation(PlotOrientation.VERTICAL);
        CandlestickRenderer r = (CandlestickRenderer) chart.getXYPlot().getRenderer();
        r.setAutoWidthMethod(CandlestickRenderer.WIDTHMETHOD_SMALLEST);

        // Y-axis
        NumberAxis numberAxis = (NumberAxis) chart.getXYPlot().getRangeAxis();
        numberAxis.setAutoRangeIncludesZero(false);
        numberAxis.setAutoRangeStickyZero(false);

        // X-axis
        DateAxis dateAxis = (DateAxis) chart.getXYPlot().getDomainAxis();
        dateAxis.setDateFormatOverride(new SimpleDateFormat("HH:mm"));
        dateAxis.setTickUnit(new DateTickUnit(DateTickUnitType.MINUTE, 1));
        dateAxis.setTickMarkPosition(DateTickMarkPosition.MIDDLE);

        // chartPanel
        chartPanel = new ChartPanel(chart){

            @Override
            public Dimension getPreferredSize() {
                return new Dimension(800, 400);
            }
        };

        // series
        addSeries1();
        addSeries2();
    }

    private void addSeries1() {
        OHLCSeries series = new OHLCSeries("One");
        series.add(new Minute(0, 12, 1, 1, 2014), 97.23D, 98.47D, 97.15D, 97.43);
        series.add(new Minute(1, 12, 1, 1, 2014), 96.47D, 98.81D, 96.27D, 97.49);
        series.add(new Minute(2, 12, 1, 1, 2014), 95.88D, 96.87D, 96.11D, 96.75);
        series.add(new Minute(3, 12, 1, 1, 2014), 96.05D, 96.94D, 95.89D, 96.59);
        series.add(new Minute(4, 12, 1, 1, 2014), 95.92D, 97.00D, 95.69D, 96.92);
        series.add(new Minute(5, 12, 1, 1, 2014), 96.34D, 96.71D, 95.68D, 96.70);
        series.add(new Minute(6, 12, 1, 1, 2014), 96.65D, 96.87D, 94.91D, 96.38);
        series.add(new Minute(7, 12, 1, 1, 2014), 97.75D, 98.20D, 96.90D, 97.24);
        series.add(new Minute(8, 12, 1, 1, 2014), 97.72D, 98.47D, 97.35D, 97.64);
        series.add(new Minute(9, 12, 1, 1, 2014), 98.30D, 98.77D, 97.56D, 97.99);
        seriesCollection.addSeries(series);
    }

    private void addSeries2() {
        OHLCSeries series = new OHLCSeries("Two");
        series.add(new Minute(0, 12, 1, 1, 2014), 96D, 96.5D, 95.5D, 96.2D);
        series.add(new Minute(1, 12, 1, 1, 2014), 100.39D, 100.24D, 99.66D, 100.13);
        series.add(new Minute(2, 12, 1, 1, 2014), 97.99D, 98.63D, 97.67D, 98.54);
        series.add(new Minute(3, 12, 1, 1, 2014), 99.33D, 99.37D, 97.96D, 98.34);
        series.add(new Minute(4, 12, 1, 1, 2014), 98.00D, 98.16D, 97.17D, 97.52);
//        series.add(new Minute(5, 12, 1, 1, 2014), 98.77D, 97.92D, 97.37D, 97.70);
//        series.add(new Minute(6, 12, 1, 1, 2014), 97.33D, 97.94D, 97.15D, 97.67);
//        series.add(new Minute(7, 12, 1, 1, 2014), 99.59D, 98.33D, 97.89D, 98.22);
//        series.add(new Minute(8, 12, 1, 1, 2014), 96.67D, 97.09D, 95.66D, 97.07);
//        series.add(new Minute(9, 12, 1, 1, 2014), 96.65D, 97.58D, 96.79D, 97.00);
        seriesCollection.addSeries(series);
    }

    public ChartPanel getChartPanel() {
        return chartPanel;
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                Sample8 app = new Sample8();
                JFrame frame = new JFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(app.getChartPanel());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }
}

Very thanks for really complex answer. As you mentioned that 2 items are required minimum to auto-calculate the width, do you think is it possible to set the width manually? Because in this case I really need to show just 1 item in serie. — Martin Ille, Dec 24 '14 at 10:26
Oh I just found setCandleWidth method - http://www.jfree.org/jfreechart/api/javadoc/org/jfree/chart/renderer/xy/CandlestickRenderer.html#setCandleWidth-double- — Martin Ille, Dec 24 '14 at 10:28
This would make a useful [answer to your own question](http://meta.stackoverflow.com/q/17463/163188). — trashgod, Dec 24 '14 at 12:59

Width of item in second series too wide

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