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

org.jfree.chart.renderer.xy.CandlestickRenderer
A renderer that draws candlesticks on an {@link XYPlot} (requires a{@link OHLCDataset}). The example shown here is generated by the CandlestickChartDemo1.java program included in the JFreeChart demo collection:

This renderer does not include code to calculate the crosshair point for the plot.

                                                    boolean legend) {


        ValueAxis timeAxis = new DateAxis(timeAxisLabel);
        NumberAxis valueAxis = new NumberAxis(valueAxisLabel);
        XYPlot plot = new XYPlot(dataset, timeAxis, valueAxis, null);
        plot.setRenderer(new CandlestickRenderer());
        JFreeChart chart = new JFreeChart(title, JFreeChart.DEFAULT_TITLE_FONT,
                plot, legend);
        return chart;


    }

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    /**
     * Some checks for the constructor.
     */
    public void testConstructor() {
        CandlestickRenderer r1 = new CandlestickRenderer();
        
        // check defaults
        assertEquals(Color.green, r1.getUpPaint());
        assertEquals(Color.red, r1.getDownPaint());
        assertFalse(r1.getUseOutlinePaint());
        assertTrue(r1.getDrawVolume());
        assertEquals(Color.gray, r1.getVolumePaint());
        assertEquals(-1.0, r1.getCandleWidth(), EPSILON);
    }

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    /**
     * Check that the equals() method distinguishes all fields.
     */
    public void testEquals() {
        CandlestickRenderer r1 = new CandlestickRenderer();
        CandlestickRenderer r2 = new CandlestickRenderer();
        assertEquals(r1, r2);
        
        // upPaint
        r1.setUpPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f, 
                Color.white));
        assertFalse(r1.equals(r2));
        r2.setUpPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f, 
                Color.white));
        assertTrue(r1.equals(r2));
        
        // downPaint
        r1.setDownPaint(new GradientPaint(5.0f, 6.0f, Color.green, 7.0f, 8.0f, 
                Color.yellow));
        assertFalse(r1.equals(r2));
        r2.setDownPaint(new GradientPaint(5.0f, 6.0f, Color.green, 7.0f, 8.0f, 
                Color.yellow));
        assertTrue(r1.equals(r2));
        
        // drawVolume
        r1.setDrawVolume(false);
        assertFalse(r1.equals(r2));
        r2.setDrawVolume(false);
        assertTrue(r1.equals(r2));
        
        // candleWidth
        r1.setCandleWidth(3.3);
        assertFalse(r1.equals(r2));
        r2.setCandleWidth(3.3);
        assertTrue(r1.equals(r2));
        
        // maxCandleWidthInMilliseconds
        r1.setMaxCandleWidthInMilliseconds(123);
        assertFalse(r1.equals(r2));
        r2.setMaxCandleWidthInMilliseconds(123);
        assertTrue(r1.equals(r2));
        
        // autoWidthMethod
        r1.setAutoWidthMethod(CandlestickRenderer.WIDTHMETHOD_SMALLEST);
        assertFalse(r1.equals(r2));
        r2.setAutoWidthMethod(CandlestickRenderer.WIDTHMETHOD_SMALLEST);
        assertTrue(r1.equals(r2));
        
        // autoWidthFactor
        r1.setAutoWidthFactor(0.22);
        assertFalse(r1.equals(r2));
        r2.setAutoWidthFactor(0.22);
        assertTrue(r1.equals(r2));
        
        // autoWidthGap
        r1.setAutoWidthGap(1.1);
        assertFalse(r1.equals(r2));
        r2.setAutoWidthGap(1.1);
        assertTrue(r1.equals(r2));
        
        r1.setUseOutlinePaint(true);
        assertFalse(r1.equals(r2));
        r2.setUseOutlinePaint(true);
        assertTrue(r1.equals(r2));
        
        r1.setVolumePaint(Color.blue);
        assertFalse(r1.equals(r2));
        r2.setVolumePaint(Color.blue);
        assertTrue(r1.equals(r2));
    }

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    /**
     * Two objects that are equal are required to return the same hashCode. 
     */
    public void testHashcode() {
        CandlestickRenderer r1 = new CandlestickRenderer();
        CandlestickRenderer r2 = new CandlestickRenderer();
        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() {
        CandlestickRenderer r1 = new CandlestickRenderer();
        CandlestickRenderer r2 = null;
        try {
            r2 = (CandlestickRenderer) r1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(r1 != r2);
        assertTrue(r1.getClass() == r2.getClass());
        assertTrue(r1.equals(r2));
    }

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


        CandlestickRenderer r1 = new CandlestickRenderer();
        CandlestickRenderer r2 = null;


        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(r1);

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    /**
     * Some checks for the findRangeBounds() method.
     */
    public void testFindRangeBounds() {
        CandlestickRenderer renderer = new CandlestickRenderer();
        
        OHLCDataItem item1 = new OHLCDataItem(new Date(1L), 2.0, 4.0, 1.0, 3.0, 
                100);
        OHLCDataset dataset = new DefaultOHLCDataset("S1", 
                new OHLCDataItem[] {item1});
        Range range = renderer.findRangeBounds(dataset);
        assertEquals(new Range(1.0, 4.0), range);


        OHLCDataItem item2 = new OHLCDataItem(new Date(1L), -1.0, 3.0, -1.0, 
                3.0, 100);
        dataset = new DefaultOHLCDataset("S1", new OHLCDataItem[] {item1, 
                item2});
        range = renderer.findRangeBounds(dataset);
        assertEquals(new Range(-1.0, 4.0), range);
        
        // try an empty dataset - should return a null range
        dataset = new DefaultOHLCDataset("S1", new OHLCDataItem[] {});
        range = renderer.findRangeBounds(dataset);
        assertNull(range);
        
        // try a null dataset - should return a null range
        range = renderer.findRangeBounds(null);
        assertNull(range);
    }

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    public static JFreeChart createCandlestickChart(String title,
            String timeAxisLabel, String valueAxisLabel, OHLCDataset dataset) {
        ValueAxis timeAxis = new DateAxis(timeAxisLabel);
        NumberAxis valueAxis = new NumberAxis(valueAxisLabel);
        XYPlot plot = new XYPlot(dataset, timeAxis, valueAxis, null);
        plot.setRenderer(new CandlestickRenderer());
        JFreeChart chart = new JFreeChart(title, plot);
        currentTheme.apply(chart);
        return chart;
    }

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    /**
     * Check that the equals() method distinguishes all fields.
     */
    public void testEquals() {
        CandlestickRenderer r1 = new CandlestickRenderer();
        CandlestickRenderer r2 = new CandlestickRenderer();
        assertEquals(r1, r2);
    }

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

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