xyplottests.java

关于jfreechart的电子说明书,一种说明图型使用的介绍

        
        // 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());
        }

        boolean b = chart.equals(chart2);
        System.out.println(b);
        assertEquals(chart, chart2);
        boolean passed = true;
        try {
            chart2.createBufferedImage(300, 200);
        }
        catch (Exception e) {
            passed = false;  
            e.printStackTrace();            
        }
        assertTrue(passed);
    }
    
    /**
     * A test to reproduce a bug in serialization: the domain and/or range
     * markers for a plot are not being serialized.
     */
    public void testSerialization4() {
        
        XYSeriesCollection dataset = new XYSeriesCollection();
        JFreeChart chart = ChartFactory.createXYLineChart(
            "Test Chart",
            "Domain Axis",
            "Range Axis",
            dataset,
            PlotOrientation.VERTICAL,
            true,
            true,
            false
        );
        XYPlot plot = (XYPlot) chart.getPlot();
        plot.addDomainMarker(new ValueMarker(1.0), Layer.FOREGROUND);
        plot.addDomainMarker(new IntervalMarker(2.0, 3.0), Layer.BACKGROUND);
        plot.addRangeMarker(new ValueMarker(4.0), Layer.FOREGROUND);
        plot.addRangeMarker(new IntervalMarker(5.0, 6.0), 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);
        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() {
        XYSeriesCollection dataset1 = new XYSeriesCollection();
        NumberAxis domainAxis1 = new NumberAxis("Domain 1");
        NumberAxis rangeAxis1 = new NumberAxis("Range 1");
        StandardXYItemRenderer renderer1 = new StandardXYItemRenderer();
        XYPlot p1 = new XYPlot(dataset1, domainAxis1, rangeAxis1, renderer1);
        NumberAxis domainAxis2 = new NumberAxis("Domain 2");
        NumberAxis rangeAxis2 = new NumberAxis("Range 2");
        StandardXYItemRenderer renderer2 = new StandardXYItemRenderer();
        XYSeriesCollection dataset2 = new XYSeriesCollection();
        p1.setDataset(1, dataset2);
        p1.setDomainAxis(1, domainAxis2);
        p1.setRangeAxis(1, rangeAxis2);
        p1.setRenderer(1, renderer2);
        XYPlot 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 = (XYPlot) 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...
        NumberAxis domainAxisA = (NumberAxis) p2.getDomainAxis(0);
        NumberAxis rangeAxisA = (NumberAxis) p2.getRangeAxis(0);
        XYSeriesCollection datasetA = (XYSeriesCollection) p2.getDataset(0);
        StandardXYItemRenderer rendererA 
            = (StandardXYItemRenderer) p2.getRenderer(0);
        NumberAxis domainAxisB = (NumberAxis) p2.getDomainAxis(1);
        NumberAxis rangeAxisB = (NumberAxis) p2.getRangeAxis(1);
        XYSeriesCollection datasetB = (XYSeriesCollection) p2.getDataset(1);
        StandardXYItemRenderer rendererB 
            = (StandardXYItemRenderer) 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));
    }

    /**
     * Some checks for the getRendererForDataset() method.
     */
    public void testGetRendererForDataset() {
        XYDataset d0 = new XYSeriesCollection();
        XYDataset d1 = new XYSeriesCollection();
        XYDataset d2 = new XYSeriesCollection();
        XYDataset d3 = new XYSeriesCollection();  // not used by plot
        XYItemRenderer r0 = new XYLineAndShapeRenderer();
        XYItemRenderer r2 = new XYLineAndShapeRenderer();
        XYPlot plot = new XYPlot();
        plot.setDataset(0, d0);
        plot.setDataset(1, d1);
        plot.setDataset(2, d2);
        plot.setRenderer(0, r0);
        // no renderer 1
        plot.setRenderer(2, r2);
        assertEquals(r0, plot.getRendererForDataset(d0));
        assertEquals(r0, plot.getRendererForDataset(d1));
        assertEquals(r2, plot.getRendererForDataset(d2));
        assertEquals(null, plot.getRendererForDataset(d3));
        assertEquals(null, plot.getRendererForDataset(null));
    }

    /**
     * Some checks for the getLegendItems() method.
     */
    public void testGetLegendItems() {
        // check the case where there is a secondary dataset that doesn't 
        // have a renderer (i.e. falls back to renderer 0)
        XYDataset d0 = createDataset1();
        XYDataset d1 = createDataset2();
        XYItemRenderer r0 = new XYLineAndShapeRenderer();
        XYPlot plot = new XYPlot();
        plot.setDataset(0, d0);
        plot.setDataset(1, d1);
        plot.setRenderer(0, r0);
        LegendItemCollection items = plot.getLegendItems();
        assertEquals(2, items.getItemCount());
    }
    
    /**
     * Creates a sample dataset.
     *
     * @return Series 1.
     */
    private IntervalXYDataset createDataset1() {

        // create dataset 1...
        TimeSeries series1 = new TimeSeries("Series 1", Day.class);
        series1.add(new Day(1, MonthConstants.MARCH, 2002), 12353.3);
        series1.add(new Day(2, MonthConstants.MARCH, 2002), 13734.4);
        series1.add(new Day(3, MonthConstants.MARCH, 2002), 14525.3);
        series1.add(new Day(4, MonthConstants.MARCH, 2002), 13984.3);
        series1.add(new Day(5, MonthConstants.MARCH, 2002), 12999.4);
        series1.add(new Day(6, MonthConstants.MARCH, 2002), 14274.3);
        series1.add(new Day(7, MonthConstants.MARCH, 2002), 15943.5);
        series1.add(new Day(8, MonthConstants.MARCH, 2002), 14845.3);
        series1.add(new Day(9, MonthConstants.MARCH, 2002), 14645.4);
        series1.add(new Day(10, MonthConstants.MARCH, 2002), 16234.6);
        series1.add(new Day(11, MonthConstants.MARCH, 2002), 17232.3);
        series1.add(new Day(12, MonthConstants.MARCH, 2002), 14232.2);
        series1.add(new Day(13, MonthConstants.MARCH, 2002), 13102.2);
        series1.add(new Day(14, MonthConstants.MARCH, 2002), 14230.2);
        series1.add(new Day(15, MonthConstants.MARCH, 2002), 11235.2);

        TimeSeriesCollection collection = new TimeSeriesCollection(series1);
        collection.setDomainIsPointsInTime(false);  
            // this tells the time series collection that
            // we intend the data to represent time periods
            // NOT points in time.  This is required when
            // determining the min/max values in the
            // dataset's domain.
        return collection;

    }

    /**
     * Creates a sample dataset.
     *
     * @return A sample dataset.
     */
    private XYDataset createDataset2() {
        // create dataset 1...
        XYSeries series = new XYSeries("Series 2");
        XYSeriesCollection collection = new XYSeriesCollection(series);
        return collection;

    }
    
    /**
     * A test for a bug where setting the renderer doesn't register the plot
     * as a RendererChangeListener.
     */
    public void testSetRenderer() {
        XYPlot plot = new XYPlot();
        XYItemRenderer renderer = new XYLineAndShapeRenderer();
        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);
    }
    
    /**
     * Some checks for the removeAnnotation() method.
     */
    public void testRemoveAnnotation() {
        XYPlot plot = new XYPlot();
        XYTextAnnotation a1 = new XYTextAnnotation("X", 1.0, 2.0);
        XYTextAnnotation a2 = new XYTextAnnotation("X", 3.0, 4.0);
        XYTextAnnotation a3 = new XYTextAnnotation("X", 1.0, 2.0);
        plot.addAnnotation(a1);
        plot.addAnnotation(a2);
        plot.addAnnotation(a3);
        plot.removeAnnotation(a2);
        XYTextAnnotation x = (XYTextAnnotation) plot.getAnnotations().get(0);
        assertEquals(x, a1);
        
        // now remove a3, but since a3.equals(a1), this will in fact remove 
        // a1...
        assertTrue(a1.equals(a3));
        plot.removeAnnotation(a3);  // actually removes a1
        x = (XYTextAnnotation) plot.getAnnotations().get(0);
        assertEquals(x, a3); 
    }
    
}