jfree chart custom label

Question

i would like to personilize my label of data in my Pie Chart, beacause in my legend i see data=value, in label i see data=value. how i do to see only name data in legend and value in label? my code for paint a chart is this:

    public JfreeChart(String applicationTitle, String chartTitle)throws SQLException {
    super(applicationTitle);
    JFreeChart barChart = null;
    dataset=createDataset(conn,barChart);


    barChart = ChartFactory.createPieChart(chartTitle,dataset, true, true, false);
    ChartPanel chartPanel = new ChartPanel(barChart);
    PiePlot plot = new PiePlot(dataset);
    plot.setLabelFont(new Font("SansSerif", Font.PLAIN, 12));
    plot.setNoDataMessage("No data available");
    plot.setCircular(true);
    plot.setLabelGap(0.02);

    chartPanel.setPreferredSize(new java.awt.Dimension(560, 367));
    setContentPane(chartPanel);
    try {
        ChartUtilities.saveChartAsPNG(new File("directory"), barChart, 600,450);
        writeChartToPDF(barChart, 600, 450,"C:\\Users\\axs0552\\Desktop\\grafico.pdf");
    } catch (IOException ex) {
        System.out.println(ex.getLocalizedMessage());
    }
}

public static void writeChartToPDF(JFreeChart chart, int width, int height,
        String fileName) {
    PdfWriter writer = null;

    Document document = new Document();

    try {
        writer = PdfWriter.getInstance(document, new FileOutputStream(
                fileName));
        document.open();
        PdfContentByte contentByte = writer.getDirectContent();
        PdfTemplate template = contentByte.createTemplate(width, height);
        Graphics2D graphics2d = template.createGraphics(width, height,new DefaultFontMapper());
        Rectangle2D rectangle2d = new Rectangle2D.Double(0, 0, width,height);

        chart.draw(graphics2d, rectangle2d);

        graphics2d.dispose();
        contentByte.addTemplate(template, 0, 0);

    } catch (Exception e) {
        e.printStackTrace();
    }
    document.close();
}

and my pie chart is this:

score 1 · Accepted Answer · edited May 23 '17 at 11:52

1

Absent your implementation of createDataset(), I'm guessing that the problem comes from the key passed to the setValue() method of your DefaultPieDataset. Instead, use the MessageFormat symbol {1} to construct a custom StandardPieSectionLabelGenerator, as shown here.

PiePlot plot = (PiePlot) chart.getPlot();
PieSectionLabelGenerator gen = new StandardPieSectionLabelGenerator("{0} = {1}");
plot.setLabelGenerator(gen);

Then you can elide the unwanted characters from your implementation of createDataset() to keep them out of the legend requested in your invocation of ChartFactory.createPieChart().

edited May 23 '17 at 11:52

Community

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answered Apr 24 '16 at 23:53

trashgod

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onother thing, it is possible click a section and view another chart( LineChart for example) to view more details? – skatedan Apr 26 '16 at 14:38
1

Yes, add a `ChartMouseListener`, for [example](http://stackoverflow.com/q/1110913/230513). – trashgod Apr 26 '16 at 15:00
i don't understand how to use this method, i place in creathechart(), but how i can link a click of one section of pie chart to details in one line chart? – skatedan Apr 26 '16 at 15:13
I'd have the `ChartMouseListener` call `setChart()` on an adjacent chart panel; ping me if you post a question on this topic. – trashgod Apr 26 '16 at 15:43

jfree chart custom label

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