categoryplottests.java

关于jfreechart的电子说明书,一种说明图型使用的介绍

        assertTrue(plot1.equals(plot2));
        
        // range markers - no longer separate fields but test anyway...
        plot1.addRangeMarker(new ValueMarker(4.0), Layer.FOREGROUND);
        assertFalse(plot1.equals(plot2));
        plot2.addRangeMarker(new ValueMarker(4.0), Layer.FOREGROUND);
        assertTrue(plot1.equals(plot2));
        
        plot1.addRangeMarker(new ValueMarker(5.0), Layer.BACKGROUND);
        assertFalse(plot1.equals(plot2));
        plot2.addRangeMarker(new ValueMarker(5.0), Layer.BACKGROUND);
        assertTrue(plot1.equals(plot2));
        
        // foreground range markers...
        plot1.addRangeMarker(1, new ValueMarker(4.0), Layer.FOREGROUND);
        assertFalse(plot1.equals(plot2));
        plot2.addRangeMarker(1, new ValueMarker(4.0), Layer.FOREGROUND);
        assertTrue(plot1.equals(plot2));
        
        // background range markers...
        plot1.addRangeMarker(1, new ValueMarker(5.0), Layer.BACKGROUND);
        assertFalse(plot1.equals(plot2));
        plot2.addRangeMarker(1, new ValueMarker(5.0), Layer.BACKGROUND);
        assertTrue(plot1.equals(plot2));

        // annotations
        plot1.addAnnotation(
            new CategoryTextAnnotation("Text", "Category", 43.0)
        );
        assertFalse(plot1.equals(plot2));
        plot2.addAnnotation(
            new CategoryTextAnnotation("Text", "Category", 43.0)
        );
        assertTrue(plot1.equals(plot2));
        
        // weight
        plot1.setWeight(3);
        assertFalse(plot1.equals(plot2));
        plot2.setWeight(3);
        assertTrue(plot1.equals(plot2));
        
        // fixed domain axis space...
        plot1.setFixedDomainAxisSpace(new AxisSpace());
        assertFalse(plot1.equals(plot2));
        plot2.setFixedDomainAxisSpace(new AxisSpace());
        assertTrue(plot1.equals(plot2));
        
        // fixed range axis space...
        plot1.setFixedRangeAxisSpace(new AxisSpace());
        assertFalse(plot1.equals(plot2));
        plot2.setFixedRangeAxisSpace(new AxisSpace());
        assertTrue(plot1.equals(plot2));

    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        CategoryPlot p1 = new CategoryPlot();
        p1.setRangeCrosshairPaint(new GradientPaint(1.0f, 2.0f, Color.white, 
                3.0f, 4.0f, Color.yellow));
        CategoryPlot p2 = null;
        try {
            p2 = (CategoryPlot) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
            System.err.println("Failed to clone.");
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {

        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        CategoryAxis domainAxis = new CategoryAxis("Domain");
        NumberAxis rangeAxis = new NumberAxis("Range");
        BarRenderer renderer = new BarRenderer();
        CategoryPlot p1 = new CategoryPlot(
            dataset, domainAxis, rangeAxis, renderer
        );
        p1.setOrientation(PlotOrientation.HORIZONTAL);
        CategoryPlot p2 = null;
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(p1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            p2 = (CategoryPlot) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertTrue(p1.equals(p2));
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization2() {

        DefaultCategoryDataset data = new DefaultCategoryDataset();
        CategoryAxis domainAxis = new CategoryAxis("Domain");
        NumberAxis rangeAxis = new NumberAxis("Range");
        BarRenderer renderer = new BarRenderer();
        CategoryPlot p1 = new CategoryPlot(
            data, domainAxis, rangeAxis, renderer
        );
        p1.setOrientation(PlotOrientation.VERTICAL);
        CategoryPlot p2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(p1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            p2 = (CategoryPlot) in.readObject();
            in.close();
        }
        catch (Exception e) {
            fail(e.toString());
        }
        assertEquals(p1, p2);

    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization3() {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        JFreeChart chart = ChartFactory.createBarChart(
            "Test Chart",
            "Category Axis",
            "Value Axis",
            dataset,
            PlotOrientation.VERTICAL,
            true,
            true,
            false
        );
        JFreeChart chart2 = null;
        
        // serialize and deserialize the chart....
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(chart);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            chart2 = (JFreeChart) in.readObject();
            in.close();
        }
        catch (Exception e) {
            fail(e.toString());
        }

        // now check that the chart is usable...
        boolean passed = true;
        try {
            chart2.createBufferedImage(300, 200);
        }
        catch (Exception e) {
            passed = false;  
            e.printStackTrace();            
        }
        assertTrue(passed);
    }
    
    /**
     * This test ensures that a plot with markers is serialized correctly.
     */
    public void testSerialization4() {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        JFreeChart chart = ChartFactory.createBarChart(
            "Test Chart",
            "Category Axis",
            "Value Axis",
            dataset,
            PlotOrientation.VERTICAL,
            true,
            true,
            false
        );
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        plot.addRangeMarker(new ValueMarker(1.1), Layer.FOREGROUND);
        plot.addRangeMarker(new IntervalMarker(2.2, 3.3), Layer.BACKGROUND);
        JFreeChart chart2 = null;
        
        // serialize and deserialize the chart....
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(chart);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            chart2 = (JFreeChart) in.readObject();
            in.close();
        }
        catch (Exception e) {
            fail(e.toString());
        }
        assertEquals(chart, chart2);
        
        // now check that the chart is usable...
        boolean passed = true;
        try {
            chart2.createBufferedImage(300, 200);
        }
        catch (Exception e) {
            passed = false;  
            e.printStackTrace();            
        }
        assertTrue(passed);
    }
    
    /**
     * Tests a bug where the plot is no longer registered as a listener
     * with the dataset(s) and axes after deserialization.  See patch 1209475
     * at SourceForge.
     */
    public void testSerialization5() {
        DefaultCategoryDataset dataset1 = new DefaultCategoryDataset();
        CategoryAxis domainAxis1 = new CategoryAxis("Domain 1");
        NumberAxis rangeAxis1 = new NumberAxis("Range 1");
        BarRenderer renderer1 = new BarRenderer();
        CategoryPlot p1 = new CategoryPlot(dataset1, domainAxis1, rangeAxis1, 
                renderer1);
        CategoryAxis domainAxis2 = new CategoryAxis("Domain 2");
        NumberAxis rangeAxis2 = new NumberAxis("Range 2");
        BarRenderer renderer2 = new BarRenderer();
        DefaultCategoryDataset dataset2 = new DefaultCategoryDataset();
        p1.setDataset(1, dataset2);
        p1.setDomainAxis(1, domainAxis2);
        p1.setRangeAxis(1, rangeAxis2);
        p1.setRenderer(1, renderer2);
        CategoryPlot p2 = null;
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(p1);
            out.close();
            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            p2 = (CategoryPlot) in.readObject();
            in.close();
        }
        catch (Exception e) {
            fail(e.toString());
        }
        assertEquals(p1, p2);
        
        // now check that all datasets, renderers and axes are being listened 
        // too...
        CategoryAxis domainAxisA = p2.getDomainAxis(0);
        NumberAxis rangeAxisA = (NumberAxis) p2.getRangeAxis(0);
        DefaultCategoryDataset datasetA 
            = (DefaultCategoryDataset) p2.getDataset(0);
        BarRenderer rendererA = (BarRenderer) p2.getRenderer(0);
        CategoryAxis domainAxisB = p2.getDomainAxis(1);
        NumberAxis rangeAxisB = (NumberAxis) p2.getRangeAxis(1);
        DefaultCategoryDataset datasetB 
            = (DefaultCategoryDataset) p2.getDataset(1);
        BarRenderer rendererB  = (BarRenderer) p2.getRenderer(1);
        assertTrue(datasetA.hasListener(p2));
        assertTrue(domainAxisA.hasListener(p2));
        assertTrue(rangeAxisA.hasListener(p2));
        assertTrue(rendererA.hasListener(p2));
        assertTrue(datasetB.hasListener(p2));
        assertTrue(domainAxisB.hasListener(p2));
        assertTrue(rangeAxisB.hasListener(p2));
        assertTrue(rendererB.hasListener(p2));
    }

    /**
     * A test for a bug where setting the renderer doesn't register the plot
     * as a RendererChangeListener.
     */
    public void testSetRenderer() {
        CategoryPlot plot = new CategoryPlot();
        CategoryItemRenderer renderer = new LineAndShapeRenderer();
        plot.setRenderer(renderer);
        // now make a change to the renderer and see if it triggers a plot
        // change event...
        MyPlotChangeListener listener = new MyPlotChangeListener();
        plot.addChangeListener(listener);
        renderer.setSeriesPaint(0, Color.black);
        assertTrue(listener.getEvent() != null);
    }
    
    /**
     * A test for bug report 1169972.
     */
    public void test1169972() {
        CategoryPlot plot = new CategoryPlot(null, null, null, null);
        plot.setDomainAxis(new CategoryAxis("C"));
        plot.setRangeAxis(new NumberAxis("Y"));
        plot.setRenderer(new BarRenderer());
        plot.setDataset(new DefaultCategoryDataset());
        assertTrue(plot != null);
    }

}