Examples of org.jfree.chart.plot.PiePlot

org.jfree.chart.plot.PiePlot
A plot that displays data in the form of a pie chart, using data from any class that implements the {@link PieDataset} interface.The example shown here is generated by the PieChartDemo2.java program included in the JFreeChart Demo Collection:

Special notes:
1. the default starting point is 12 o'clock and the pie sections proceed in a clockwise direction, but these settings can be changed;
2. negative values in the dataset are ignored;
3. there are utility methods for creating a {@link PieDataset} from a{@link org.jfree.data.category.CategoryDataset};
@see Plot @see PieDataset


    /**
     * Some basic checks for the clone() method.
     */
    public void testCloning() {
        PiePlot p1 = new PiePlot();
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));
    }

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    /**
     * Check cloning of the urlGenerator field.
     */
    public void testCloning_URLGenerator() {
        CustomPieURLGenerator generator = new CustomPieURLGenerator();
        PiePlot p1 = new PiePlot();
        p1.setURLGenerator(generator);
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));


        // check that the URL generator has been cloned
        assertTrue(p1.getURLGenerator() != p2.getURLGenerator());
    }

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    /**
     * Check cloning of the legendItemShape field.
     */
    public void testCloning_LegendItemShape() {
        Rectangle shape = new Rectangle(-4, -4, 8, 8);
        PiePlot p1 = new PiePlot();
        p1.setLegendItemShape(shape);
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));


        // change the shape and make sure it only affects p1
        shape.setRect(1.0, 2.0, 3.0, 4.0);
        assertFalse(p1.equals(p2));

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     * Check cloning of the legendLabelGenerator field.
     */
    public void testCloning_LegendLabelGenerator() {
        StandardPieSectionLabelGenerator generator
                = new StandardPieSectionLabelGenerator();
        PiePlot p1 = new PiePlot();
        p1.setLegendLabelGenerator(generator);
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));


        // change the generator and make sure it only affects p1
        generator.getNumberFormat().setMinimumFractionDigits(2);
        assertFalse(p1.equals(p2));

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     * Check cloning of the legendLabelToolTipGenerator field.
     */
    public void testCloning_LegendLabelToolTipGenerator() {
        StandardPieSectionLabelGenerator generator
                = new StandardPieSectionLabelGenerator();
        PiePlot p1 = new PiePlot();
        p1.setLegendLabelToolTipGenerator(generator);
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));


        // change the generator and make sure it only affects p1
        generator.getNumberFormat().setMinimumFractionDigits(2);
        assertFalse(p1.equals(p2));

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    /**
     * Check cloning of the legendLabelURLGenerator field.
     */
    public void testCloning_LegendLabelURLGenerator() {
        CustomPieURLGenerator generator = new CustomPieURLGenerator();
        PiePlot p1 = new PiePlot();
        p1.setLegendLabelURLGenerator(generator);
        PiePlot p2 = null;
        try {
            p2 = (PiePlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));


        // check that the URL generator has been cloned
        assertTrue(p1.getLegendLabelURLGenerator()
                != p2.getLegendLabelURLGenerator());
    }

View Full Code Here


    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        PiePlot p1 = new PiePlot(null);
        PiePlot p2 = null;
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(p1);
            out.close();

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        dataset.setValue("Item 1", 1.0);
        dataset.setValue("Item 2", 2.0);
        dataset.setValue("Item 3", 0.0);
        dataset.setValue("Item 4", null);


        PiePlot plot = new PiePlot(dataset);
        plot.setIgnoreNullValues(false);
        plot.setIgnoreZeroValues(false);
        LegendItemCollection items = plot.getLegendItems();
        assertEquals(4, items.getItemCount());


        // check that null items are ignored if requested
        plot.setIgnoreNullValues(true);
        items = plot.getLegendItems();
        assertEquals(3, items.getItemCount());


        // check that zero items are ignored if requested
        plot.setIgnoreZeroValues(true);
        items = plot.getLegendItems();
        assertEquals(2, items.getItemCount());


        // check that negative items are always ignored
        dataset.setValue("Item 5", -1.0);
        items = plot.getLegendItems();
        assertEquals(2, items.getItemCount());
    }

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    /**
     * Check that the default base section paint is not null, and that you
     * can never set it to null.
     */
    public void testGetBaseSectionPaint() {
        PiePlot plot = new PiePlot();
        assertNotNull(plot.getBaseSectionPaint());


        boolean pass = false;
        try {
            plot.setBaseSectionPaint(null);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);

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        DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("L1", 12.0);
        dataset.setValue("L2", 11.0);
        JFreeChart chart = ChartFactory.createPieChart("Test", dataset, true,
                false, false);
        PiePlot plot = (PiePlot) chart.getPlot();
        plot.setLegendLabelGenerator(new NullLegendLabelGenerator());
        boolean success = false;
        try {
            BufferedImage image = new BufferedImage(200 , 100,
                    BufferedImage.TYPE_INT_RGB);
            Graphics2D g2 = image.createGraphics();

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