Example usage for org.jfree.data.extension.impl PieCursor PieCursor

Introduction

In this page you can find the example usage for org.jfree.data.extension.impl PieCursor PieCursor.

Prototype

public PieCursor() 

Source Link

Document

creates a cursor without assigned position (the cursor will only be valid if setPosition is called at some time)

Usage

From source file:org.jfree.chart.demo.selection.SelectionDemo6Pie.java

private static JFreeChart createChart(final PieDataset dataset,
        DatasetSelectionExtension<PieCursor<String>> ext) {
    JFreeChart chart = ChartFactory.createPieChart("Pie Chart Demo 2", dataset);

    final PiePlot plot = (PiePlot) chart.getPlot();
    plot.setSectionPaint("One", new Color(160, 160, 255));
    plot.setSectionPaint("Two", new Color(128, 128, 255 - 32));
    plot.setSectionPaint("Three", new Color(96, 96, 255 - 64));
    plot.setSectionPaint("Four", new Color(64, 64, 255 - 96));
    plot.setSectionPaint("Five", new Color(32, 32, 255 - 128));
    plot.setSectionPaint("Six", new Color(0, 0, 255 - 144));

    plot.setNoDataMessage("No data available");

    plot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0} ({2} percent)"));
    plot.setLabelBackgroundPaint(new Color(220, 220, 220));

    plot.setLegendLabelToolTipGenerator(new StandardPieSectionLabelGenerator("Tooltip for legend item {0}"));
    plot.setSimpleLabels(true);//from  w w  w. j  ava 2 s .c o  m
    plot.setInteriorGap(0.1);

    //pie plots done use abstract renderers need to react to selection on our own
    final PieCursor<String> cursor = new PieCursor<String>();

    ext.addChangeListener(new SelectionChangeListener<PieCursor<String>>() {
        public void selectionChanged(SelectionChangeEvent<PieCursor<String>> event) {
            for (int i = 0; i < dataset.getItemCount(); i++) {
                cursor.setPosition((String) dataset.getKey(i));
                if (event.getSelectionExtension().isSelected(cursor)) {
                    plot.setExplodePercent(cursor.key, 0.15);
                } else {
                    plot.setExplodePercent(cursor.key, 0.0);
                }
            }
        }
    });

    return chart;
}

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