Examples of org.jfree.chart.renderer.xy.XYBlockRenderer

org.jfree.chart.renderer.xy.XYBlockRenderer
A renderer that represents data from an {@link XYZDataset} by drawing acolor block at each (x, y) point, where the color is a function of the z-value from the dataset. The example shown here is generated by the XYBlockChartDemo1.java program included in the JFreeChart demo collection:

@since 1.0.4


    /**
     * Some tests for the findRangeBounds() method.
     */
    public void testFindRangeBounds() {
        XYBlockRenderer renderer = new XYBlockRenderer();
        assertNull(renderer.findRangeBounds(null));


        XYSeriesCollection dataset = new XYSeriesCollection();
        XYSeries series = new XYSeries("S1");
        series.add(1.0, null);
        dataset.addSeries(series);
        Range r = renderer.findRangeBounds(dataset);
        assertNull(r);
    }

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    /**
     * Some tests for the findDomainBounds() method.
     */
    public void testFindDomainBounds() {
        XYBlockRenderer renderer = new XYBlockRenderer();
        assertNull(renderer.findRangeBounds(null));


        XYSeriesCollection dataset = new XYSeriesCollection();
        XYSeries series = new XYSeries("S1");
        series.add(1.0, null);
        dataset.addSeries(series);
        Range r = renderer.findDomainBounds(dataset);
        assertEquals(0.5, r.getLowerBound(), EPSILON);
        assertEquals(1.5, r.getUpperBound(), EPSILON);


        dataset.removeAllSeries();
        r = renderer.findDomainBounds(dataset);
        assertNull(r);
    }

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     * Test that the equals() method distinguishes all fields.
     */
    public void testEquals() {


        // default instances
        XYBlockRenderer r1 = new XYBlockRenderer();
        XYBlockRenderer r2 = new XYBlockRenderer();
        assertTrue(r1.equals(r2));
        assertTrue(r2.equals(r1));


        // blockHeight
        r1.setBlockHeight(2.0);
        assertFalse(r1.equals(r2));
        r2.setBlockHeight(2.0);
        assertTrue(r1.equals(r2));


        // blockWidth
        r1.setBlockWidth(2.0);
        assertFalse(r1.equals(r2));
        r2.setBlockWidth(2.0);
        assertTrue(r1.equals(r2));


        // paintScale
        r1.setPaintScale(new GrayPaintScale(0.0, 1.0));
        assertFalse(r1.equals(r2));
        r2.setPaintScale(new GrayPaintScale(0.0, 1.0));
        assertTrue(r1.equals(r2));


    }

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    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashcode() {
        XYBlockRenderer r1 = new XYBlockRenderer();
        XYBlockRenderer r2 = new XYBlockRenderer();
        assertTrue(r1.equals(r2));
        int h1 = r1.hashCode();
        int h2 = r2.hashCode();
        assertEquals(h1, h2);
    }

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    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        XYBlockRenderer r1 = new XYBlockRenderer();
        LookupPaintScale scale1 = new LookupPaintScale();
        r1.setPaintScale(scale1);
        XYBlockRenderer r2 = null;
        try {
            r2 = (XYBlockRenderer) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));


        // check independence
        scale1.add(0.5, Color.red);
        assertFalse(r1.equals(r2));
        LookupPaintScale scale2 = (LookupPaintScale) r2.getPaintScale();
        scale2.add(0.5, Color.red);
        assertTrue(r1.equals(r2));
    }

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    /**
     * Verify that this class implements {@link PublicCloneable}.
     */
    public void testPublicCloneable() {
        XYBlockRenderer r1 = new XYBlockRenderer();
        assertTrue(r1 instanceof PublicCloneable);
    }

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    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        XYBlockRenderer r1 = new XYBlockRenderer();
        XYBlockRenderer r2 = null;
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(r1);
            out.close();

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    /**
     * A simple test for bug 1766646.
     */
    public void testBug1766646A() {
        XYBlockRenderer r = new XYBlockRenderer();
        Range range = r.findDomainBounds(null);
        assertTrue(range == null);
        DefaultXYZDataset emptyDataset = new DefaultXYZDataset();
        range = r.findDomainBounds(emptyDataset);
        assertTrue(range == null);
    }

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    /**
     * A simple test for bug 1766646.
     */
    public void testBug1766646B() {
        XYBlockRenderer r = new XYBlockRenderer();
        Range range = r.findRangeBounds(null);
        assertTrue(range == null);
        DefaultXYZDataset emptyDataset = new DefaultXYZDataset();
        range = r.findRangeBounds(emptyDataset);
        assertTrue(range == null);
    }

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    /**
     * Some tests for the findRangeBounds() method.
     */
    public void testFindRangeBounds() {
        XYBlockRenderer renderer = new XYBlockRenderer();
        assertNull(renderer.findRangeBounds(null));


        XYSeriesCollection dataset = new XYSeriesCollection();
        XYSeries series = new XYSeries("S1");
        series.add(1.0, null);
        dataset.addSeries(series);
        Range r = renderer.findRangeBounds(dataset);
        assertNull(r);
    }

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