Examples of org.jfree.chart.plot.ValueMarker

org.jfree.chart.plot.ValueMarker
A marker that represents a single value. Markers can be added to plots to highlight specific values.


    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        ValueMarker m1 = new ValueMarker(25.0);
        ValueMarker m2 = null;
        try {
            m2 = (ValueMarker) m1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(m1 != m2);
        assertTrue(m1.getClass() == m2.getClass());
        assertTrue(m1.equals(m2));
    }

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


        ValueMarker m1 = new ValueMarker(25.0);
        ValueMarker m2 = null;


        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(m1);

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    /**
     * Some checks for the getValue() and setValue() methods.
     */
    public void testGetSetValue() {
        ValueMarker m = new ValueMarker(1.1);
        m.addChangeListener(this);
        this.lastEvent = null;
        assertEquals(1.1, m.getValue(), EPSILON);
        m.setValue(33.3);
        assertEquals(33.3, m.getValue(), EPSILON);
        assertEquals(m, this.lastEvent.getMarker());
    }

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    /**
     * A test for bug 1802195.
     */
    public void test1802195() {


        ValueMarker m1 = new ValueMarker(25.0);
        ValueMarker m2 = null;


        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(m1);
            out.close();


            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            m2 = (ValueMarker) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        boolean b = m1.equals(m2);
        assertTrue(b);


        boolean pass = true;
        try {
            m2.setValue(-10.0);
        }
        catch (NullPointerException e) {
            pass = false;
        }
        assertTrue(pass);

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     * A test for bug report 1808376.
     */
    public void test1808376() {
        Stroke stroke = new BasicStroke(1.0f);
        Stroke outlineStroke = new BasicStroke(2.0f);
        ValueMarker m = new ValueMarker(1.0, Color.red, stroke, Color.blue,
                outlineStroke, 0.5f);
        assertEquals(1.0, m.getValue(), EPSILON);
        assertEquals(Color.red, m.getPaint());
        assertEquals(stroke, m.getStroke());
        assertEquals(Color.blue, m.getOutlinePaint());
        assertEquals(outlineStroke, m.getOutlineStroke());
        assertEquals(0.5f, m.getAlpha(), EPSILON);
    }

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        assertFalse(plot1.equals(plot2));
        plot2.addDomainMarker(new CategoryMarker("C2"), Layer.BACKGROUND);
        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));

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        p1.addDomainMarker(new CategoryMarker("C2"), Layer.BACKGROUND);
        assertFalse(p1.equals(p2));
        p2.addDomainMarker(new CategoryMarker("C2"), Layer.BACKGROUND);
        assertTrue(p1.equals(p2));


        p1.addRangeMarker(new ValueMarker(1.0), Layer.FOREGROUND);
        assertFalse(p1.equals(p2));
        p2.addRangeMarker(new ValueMarker(1.0), Layer.FOREGROUND);
        assertTrue(p1.equals(p2));


        p1.addRangeMarker(new ValueMarker(2.0), Layer.BACKGROUND);
        assertFalse(p1.equals(p2));
        p2.addRangeMarker(new ValueMarker(2.0), Layer.BACKGROUND);
        assertTrue(p1.equals(p2));
    }

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        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 {

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    /**
     * Some tests for the addRangeMarker() method(s).
     */
    public void testAddRangeMarker() {
        CategoryPlot plot = new CategoryPlot();
        Marker m = new ValueMarker(1.0);
        plot.addRangeMarker(m);
        List listeners = Arrays.asList(m.getListeners(
                MarkerChangeListener.class));
        assertTrue(listeners.contains(plot));
        plot.clearRangeMarkers();
        listeners = Arrays.asList(m.getListeners(MarkerChangeListener.class));
        assertFalse(listeners.contains(plot));
    }

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     * Check that removing a marker that isn't assigned to the plot returns
     * false.
     */
    public void testRemoveRangeMarker() {
        CategoryPlot plot = new CategoryPlot();
        assertFalse(plot.removeRangeMarker(new ValueMarker(0.5)));
    }

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