org.jfree.chart.axis.CategoryLabelPositions Java Examples

private void setAttribute(JFreeChart chart) {
	// 圖案與文字的間隔
	LegendTitle legend = chart.getLegend();
	legend.setBorder(1, 1, 1, 1);

	CategoryPlot plot = chart.getCategoryPlot();
	// 設定WorkItem的屬性
	CategoryAxis domainAxis = plot.getDomainAxis();
	domainAxis.setCategoryLabelPositions(CategoryLabelPositions.DOWN_45); // 字體角度
	domainAxis.setTickLabelFont(new Font("新細明體", Font.TRUETYPE_FONT, 12)); // 字體

	// 設定Date的屬性
	DateAxis da = (DateAxis) plot.getRangeAxis(0);
	setDateAxis(da);

	// 設定實體的顯示名稱
	CategoryItemRenderer render = plot.getRenderer(0);
	DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
	CategoryItemLabelGenerator generator = new IntervalCategoryItemLabelGenerator(
			"{3} ~ {4}", format);
	render.setBaseItemLabelGenerator(generator);
	render.setBaseItemLabelPaint(Color.BLUE);
	render.setBaseItemLabelsVisible(true);
	render.setBaseItemLabelFont(new Font("黑體", Font.TRUETYPE_FONT, 8));
	render.setSeriesPaint(0, Color.RED);
}
 

public static CategoryAxis createCategoryDomainAxis(PlotConfiguration plotConfiguration) {
	CategoryAxis domainAxis = new CategoryAxis(null);
	String label = plotConfiguration.getDomainConfigManager().getLabel();
	if (label == null) {
		label = I18N.getGUILabel("plotter.unnamed_value_label");
	}
	domainAxis.setLabel(label);

	Font axesFont = plotConfiguration.getAxesFont();
	if (axesFont != null) {
		domainAxis.setLabelFont(axesFont);
		domainAxis.setTickLabelFont(axesFont);
	}

	// rotate labels
	if (plotConfiguration.getOrientation() != PlotOrientation.HORIZONTAL) {
		domainAxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 2.0d));
	}

	formatAxis(plotConfiguration, domainAxis);
	return domainAxis;
}
 

public JFreeChart createProfileChart(CategoryDataset categoryDataset, List<ProfileRow> rows, String name) throws MicroarrayException {
					
	// draw plot
       CategoryAxis categoryAxis = new CategoryAxis("sample");
       categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
       categoryAxis.setUpperMargin(0.0);
       categoryAxis.setLowerMargin(0.0);
       ValueAxis valueAxis = new NumberAxis("expression");
       plot = new CategoryPlot(categoryDataset, categoryAxis, valueAxis, createRenderer(rows));
       plot.setOrientation(PlotOrientation.VERTICAL);
       
       JFreeChart chart = new JFreeChart("Expression profile for " + name, 
       		JFreeChart.DEFAULT_TITLE_FONT, plot, false);
       
	return chart;
}
 

/**
 * Two objects that are equal are required to return the same hashCode.
 */
public void testHashCode() {
    CategoryLabelPositions p1 = new CategoryLabelPositions(
            new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER),
            new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER),
            new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER),
            new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER));
    CategoryLabelPositions p2 = new CategoryLabelPositions(
            new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER),
            new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER),
            new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER),
            new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER));
    assertTrue(p1.equals(p2));
    int h1 = p1.hashCode();
    int h2 = p2.hashCode();
    assertEquals(h1, h2);
}
 

private JFreeChart getStackedBarChart( final Visualization visualization, CategoryDataset dataSet, boolean horizontal )
{
    JFreeChart stackedBarChart = ChartFactory.createStackedBarChart( visualization.getName(), visualization.getDomainAxisLabel(),
        visualization.getRangeAxisLabel(), dataSet, PlotOrientation.VERTICAL, !visualization.isHideLegend(), false, false );

    setBasicConfig( stackedBarChart, visualization );

    CategoryPlot plot = (CategoryPlot) stackedBarChart.getPlot();
    plot.setOrientation( horizontal ? PlotOrientation.HORIZONTAL : PlotOrientation.VERTICAL );
    plot.setRenderer( getStackedBarRenderer() );

    CategoryAxis xAxis = plot.getDomainAxis();
    xAxis.setCategoryLabelPositions( CategoryLabelPositions.UP_45 );

    return stackedBarChart;
}
 

private JFreeChart getStackedAreaChart( final Visualization visualization, CategoryDataset dataSet )
{
    JFreeChart stackedAreaChart = ChartFactory.createStackedAreaChart( visualization.getName(), visualization.getDomainAxisLabel(),
        visualization.getRangeAxisLabel(), dataSet, PlotOrientation.VERTICAL, !visualization.isHideLegend(), false, false );

    setBasicConfig( stackedAreaChart, visualization );

    CategoryPlot plot = (CategoryPlot) stackedAreaChart.getPlot();
    plot.setOrientation( PlotOrientation.VERTICAL );
    plot.setRenderer( getStackedAreaRenderer() );

    CategoryAxis xAxis = plot.getDomainAxis();
    xAxis.setCategoryLabelPositions( CategoryLabelPositions.UP_45 );
    xAxis.setLabelFont( LABEL_FONT );

    return stackedAreaChart;
}
 

@Override
public JFreeChart createChartImpl(String title, String xAxisTitle, String yAxisTitle, final Dataset dataset,
        PlotOrientation plotOrientation, boolean showLegend, boolean showToolTips, boolean showUrls)
{
    CategoryAxis xAxis = new CategoryAxis(xAxisTitle);
    ValueAxis yAxis = new NumberAxis(yAxisTitle);
    CategoryItemRenderer renderer = new StatisticalBarRenderer();

    CategoryPlot plot = new CategoryPlot((StatisticalCategoryDataset) dataset, xAxis, yAxis, renderer);

    JFreeChart chart = new JFreeChart(title, new Font("Arial", Font.PLAIN, 10), plot, true);

    chart.getCategoryPlot().getDomainAxis().setCategoryLabelPositions(CategoryLabelPositions.UP_45);

    return chart;
}
 

private JFreeChart getStackedBarChart( BaseChart chart, CategoryDataset dataSet, boolean horizontal )
{
    JFreeChart stackedBarChart = ChartFactory.createStackedBarChart( chart.getName(), chart.getDomainAxisLabel(),
        chart.getRangeAxisLabel(), dataSet, PlotOrientation.VERTICAL, !chart.isHideLegend(), false, false );

    setBasicConfig( stackedBarChart, chart );

    CategoryPlot plot = (CategoryPlot) stackedBarChart.getPlot();
    plot.setOrientation( horizontal ? PlotOrientation.HORIZONTAL : PlotOrientation.VERTICAL );
    plot.setRenderer( getStackedBarRenderer() );

    CategoryAxis xAxis = plot.getDomainAxis();
    xAxis.setCategoryLabelPositions( CategoryLabelPositions.UP_45 );

    return stackedBarChart;
}
 

private JFreeChart getStackedAreaChart( BaseChart chart, CategoryDataset dataSet )
{
    JFreeChart stackedAreaChart = ChartFactory.createStackedAreaChart( chart.getName(), chart.getDomainAxisLabel(),
        chart.getRangeAxisLabel(), dataSet, PlotOrientation.VERTICAL, !chart.isHideLegend(), false, false );

    setBasicConfig( stackedAreaChart, chart );

    CategoryPlot plot = (CategoryPlot) stackedAreaChart.getPlot();
    plot.setOrientation( PlotOrientation.VERTICAL );
    plot.setRenderer( getStackedAreaRenderer() );

    CategoryAxis xAxis = plot.getDomainAxis();
    xAxis.setCategoryLabelPositions( CategoryLabelPositions.UP_45 );
    xAxis.setLabelFont( LABEL_FONT );

    return stackedAreaChart;
}
 

@Override
@Transactional( readOnly = true )
public JFreeChart getJFreeChart( String name, PlotOrientation orientation, CategoryLabelPositions labelPositions,
    Map<String, Double> categoryValues )
{
    DefaultCategoryDataset dataSet = new DefaultCategoryDataset();

    for ( Entry<String, Double> entry : categoryValues.entrySet() )
    {
        dataSet.addValue( entry.getValue(), name, entry.getKey() );
    }

    CategoryPlot plot = getCategoryPlot( dataSet, getBarRenderer(), orientation, labelPositions );

    JFreeChart jFreeChart = getBasicJFreeChart( plot );
    jFreeChart.setTitle( name );

    return jFreeChart;
}
 

/**
 * Two objects that are equal are required to return the same hashCode. 
 */
public void testHashCode() {
    CategoryLabelPositions p1 = new CategoryLabelPositions(
        new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER), 
        new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER), 
        new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER), 
        new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER) 
    );
    CategoryLabelPositions p2 = new CategoryLabelPositions(
        new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER), 
        new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER), 
        new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER), 
        new CategoryLabelPosition(RA_TOP, TextBlockAnchor.CENTER) 
    );
    assertTrue(p1.equals(p2));
    int h1 = p1.hashCode();
    int h2 = p2.hashCode();
    assertEquals(h1, h2);
}
 

/**
 * Create graph based on the given dataset and constraints.
 *
 * @return The JFreeChart graph.
 */
protected JFreeChart createGraph() {
    // Create chart.
    JFreeChart chart = ChartFactory.createStackedAreaChart(null, null, yLabel, dataset, PlotOrientation.VERTICAL, true, true, false);
    chart.setBackgroundPaint(Color.WHITE);

    // Create chart legend.
    LegendTitle legend = chart.getLegend();
    legend.setPosition(RectangleEdge.RIGHT);

    // Create chart plot.
    CategoryPlot plot = (CategoryPlot) chart.getPlot();
    plot.setForegroundAlpha(0.7f);
    plot.setBackgroundPaint(Color.WHITE);
    plot.setRangeGridlinePaint(Color.darkGray);

    // Create domain (x) axis.
    CategoryAxis domain = new ShiftedCategoryAxis(xLabel);
    domain.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
    domain.setLowerMargin(0.0);
    domain.setUpperMargin(0.0);
    domain.setCategoryMargin(0.0);
    plot.setDomainAxis(domain);

    // Create range (y) axis.
    NumberAxis range = (NumberAxis) plot.getRangeAxis();
    range.setAutoRange(true);
    range.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    // Create renderer and paint the chart.
    CategoryItemRenderer renderer = plot.getRenderer();
    plot.setInsets(new RectangleInsets(5.0, 0, 0, 5.0));

    // Set chart colors for sections.
    for (int i = 0; i < colors.length; i++) {
        renderer.setSeriesPaint(i, colors[i]);
    }
    return chart;
}
 

/**
 * Returns a CategoryPlot.
 */
private CategoryPlot getCategoryPlot( CategoryDataset dataSet, CategoryItemRenderer renderer,
    PlotOrientation orientation, CategoryLabelPositions labelPositions )
{
    CategoryPlot plot = new CategoryPlot( dataSet, new CategoryAxis(), new NumberAxis(), renderer );

    plot.setDatasetRenderingOrder( DatasetRenderingOrder.FORWARD );
    plot.setOrientation( orientation );

    CategoryAxis xAxis = plot.getDomainAxis();
    xAxis.setCategoryLabelPositions( labelPositions );

    return plot;
}
 

protected void handleCategoryPlotSettings(CategoryPlot p, JRChartPlot jrPlot)
{
	Double defaultPlotLabelRotation = (Double)getDefaultValue(defaultPlotPropertiesMap, ChartThemesConstants.PLOT_LABEL_ROTATION);
	PlotOrientation defaultPlotOrientation = (PlotOrientation)getDefaultValue(defaultPlotPropertiesMap, ChartThemesConstants.PLOT_ORIENTATION);
	// Handle rotation of the category labels.
	CategoryAxis axis = p.getDomainAxis();
	boolean hasRotation = jrPlot.getLabelRotationDouble() != null || defaultPlotLabelRotation != null;
	if(hasRotation)
	{
		double labelRotation = jrPlot.getLabelRotationDouble() != null ? 
				jrPlot.getLabelRotationDouble() :
				defaultPlotLabelRotation;
		
		if (labelRotation == 90)
		{
			axis.setCategoryLabelPositions(CategoryLabelPositions.DOWN_90);
		}
		else if (labelRotation == -90) {
			axis.setCategoryLabelPositions(CategoryLabelPositions.UP_90);
		}
		else if (labelRotation < 0)
		{
			axis.setCategoryLabelPositions(
					CategoryLabelPositions.createUpRotationLabelPositions( (-labelRotation / 180.0) * Math.PI));
		}
		else if (labelRotation > 0)
		{
			axis.setCategoryLabelPositions(
					CategoryLabelPositions.createDownRotationLabelPositions((labelRotation / 180.0) * Math.PI));
		}
	}
	
	if (defaultPlotOrientation != null)
	{
		p.setOrientation(defaultPlotOrientation);
	}
}
 

public JFreeChart getChart() {
    if (chart == null) {
        createDataset();
        chart = ChartFactory.createBarChart(getTitle(),
                // chart title
                "Category",
                // domain axis label
                "Value",
                // range axis label
                dataset,
                // data
                PlotOrientation.VERTICAL,
                // orientation
                false,
                // include legend
                true,
                // tooltips?
                false
        // URLs?
        );
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        CategoryAxis rangeAxis = plot.getDomainAxis();
        rangeAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_90);
        final BoxAndWhiskerRenderer renderer = new BoxAndWhiskerRenderer();
        renderer.setFillBox(true);
        renderer.setToolTipGenerator(new BoxAndWhiskerToolTipGenerator());
        // TODO reactivate if newer jfree is used
        // renderer.setMeanVisible(isMeanVisible);
        plot.setRenderer(renderer);
    }

    return chart;
}
 

public JFreeChart getChart() {
    if (chart == null) {
        createDataset();
        chart = ChartFactory.createBarChart(title,
        // chart title
                xLabel,
                // domain axis label
                yLabel,
                // range axis label
                dataset,
                // data
                PlotOrientation.VERTICAL,
                // orientation
                false,
                // include legend
                true,
                // tooltips?
                false
        // URLs?
                );

        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        CategoryAxis rangeAxis = plot.getDomainAxis();
        rangeAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_90);
    }
    return chart;
}
 

@Override
protected final JFreeChart createChartImpl(String title, String xAxisTitle, String yAxisTitle, Dataset dataset, PlotOrientation plotOrientation, boolean showLegend, boolean showToolTips, boolean showUrls)
{
    JFreeChart chart = createCategoryChart(title, xAxisTitle, yAxisTitle, dataset, plotOrientation, showLegend, showToolTips, showUrls);
    chart.getCategoryPlot().getDomainAxis().setCategoryLabelPositions(CategoryLabelPositions.UP_45);
    return chart;
}
 

@Override
public void summaryTarget(AnalysisSummary analysisSummary, File relativeDirectory, ColorDataIndexed colorScheme) {
    /** the data for the histogram is gathered from the RoboTaxiRequestRecorder, basic
     * information can also be retrieved from the analsysisSummary */
    Tensor requestsPerRoboTaxi = roboTaxiRequestRecorder.getRequestsPerRoboTaxi();
    Scalar numberOfRoboTaxis = RealScalar.of(requestsPerRoboTaxi.length());
    Scalar totalRequestsServed = (Scalar) Total.of(requestsPerRoboTaxi);
    Scalar histoGrambinSize = Scalars.lessThan(RealScalar.ZERO, totalRequestsServed) ? //
            totalRequestsServed.divide(numberOfRoboTaxis.multiply(RealScalar.of(10))) : RealScalar.ONE;

    try {
        /** compute bins */
        Scalar numValues = RationalScalar.of(requestsPerRoboTaxi.length(), 1);
        Tensor bins = BinCounts.of(requestsPerRoboTaxi, histoGrambinSize);
        bins = bins.divide(numValues).multiply(RealScalar.of(100)); // norm

        VisualSet visualSet = new VisualSet(colorScheme);
        visualSet.add(Range.of(0, bins.length()).multiply(histoGrambinSize), bins);
        // ---
        visualSet.setPlotLabel("Number of Requests Served per RoboTaxi");
        visualSet.setAxesLabelY("% of RoboTaxis");
        visualSet.setAxesLabelX("Requests");

        JFreeChart jFreeChart = Histogram.of(visualSet, s -> "[" + s.number() + " , " + s.add(histoGrambinSize).number() + ")");
        CategoryPlot categoryPlot = jFreeChart.getCategoryPlot();
        categoryPlot.getDomainAxis().setLowerMargin(0.0);
        categoryPlot.getDomainAxis().setUpperMargin(0.0);
        categoryPlot.getDomainAxis().setCategoryMargin(0.0);
        categoryPlot.getDomainAxis().setCategoryLabelPositions(CategoryLabelPositions.UP_90);
        categoryPlot.setDomainGridlinePosition(CategoryAnchor.START);

        File file = new File(relativeDirectory, FILENAME);
        AmodeusChartUtils.saveAsPNG(jFreeChart, file.toString(), WIDTH, HEIGHT);
        GlobalAssert.that(file.isFile());
    } catch (Exception exception) {
        System.err.println("Plot of the Number of Requests per RoboTaxi Failed");
        exception.printStackTrace();
    }
}
 

private byte[] generateLayeredBarChart (CategoryDataset dataset, int width, int height)
{
	JFreeChart chart = ChartFactory.createBarChart (null, // chart title
			null, // domain axis label
			null, // range axis label
			dataset, // data
			PlotOrientation.VERTICAL, // the plot orientation
			true, // legend
			true, // tooltips
			false // urls
			);

	// set background
	chart.setBackgroundPaint (parseColor (statsManager.getChartBackgroundColor ()));

	// set chart border
	chart.setPadding (new RectangleInsets (10, 5, 5, 5));
	chart.setBorderVisible (true);
	chart.setBorderPaint (parseColor ("#cccccc"));

	// set anti alias
	chart.setAntiAlias (true);

	CategoryPlot plot = (CategoryPlot) chart.getPlot ();

	// disable bar outlines...
	LayeredBarRenderer renderer = new LayeredBarRenderer ();
	renderer.setDrawBarOutline (false);
	renderer.setSeriesBarWidth (0, .6);
	renderer.setSeriesBarWidth (1, .8);
	renderer.setSeriesBarWidth (2, 1.0);
	plot.setRenderer (renderer);

	// for this renderer, we need to draw the first series last...
	plot.setRowRenderingOrder (SortOrder.DESCENDING);

	// set up gradient paints for series...
	GradientPaint gp0 = new GradientPaint (0.0f, 0.0f, Color.blue, 0.0f,
			0.0f, new Color (0, 0, 64));
	GradientPaint gp1 = new GradientPaint (0.0f, 0.0f, Color.green, 0.0f,
			0.0f, new Color (0, 64, 0));
	GradientPaint gp2 = new GradientPaint (0.0f, 0.0f, Color.red, 0.0f,
			0.0f, new Color (64, 0, 0));
	renderer.setSeriesPaint (0, gp0);
	renderer.setSeriesPaint (1, gp1);
	renderer.setSeriesPaint (2, gp2);

	CategoryAxis domainAxis = (CategoryAxis) plot.getDomainAxis ();
	domainAxis.setCategoryLabelPositions (CategoryLabelPositions.DOWN_45);
	domainAxis.setLowerMargin (0.0);
	domainAxis.setUpperMargin (0.0);

	BufferedImage img = chart.createBufferedImage (width, height);
	final ByteArrayOutputStream out = new ByteArrayOutputStream();
	try{
		ImageIO.write(img, "png", out);
	}catch(IOException e){
		log.warn("Error occurred while generating SiteStats chart image data", e);
	}
	return out.toByteArray();
}
 

private JFreeChart createChart() {
	if (data.getItemCount() > 0) {
		// get cumulative percentages
		KeyedValues cumulative = DataUtilities.getCumulativePercentages(data);

		CategoryDataset categoryDataset = DatasetUtilities.createCategoryDataset(
				"Count for " + this.dataTable.getColumnName(this.countColumn) + " = " + countValue, data);

		// create the chart...
		final JFreeChart chart = ChartFactory.createBarChart(null, // chart title
				this.dataTable.getColumnName(this.groupByColumn), // domain axis label
				"Count", // range axis label
				categoryDataset, // data
				PlotOrientation.VERTICAL, true, // include legend
				true, false);

		// set the background color for the chart...
		chart.setBackgroundPaint(Color.WHITE);

		// get a reference to the plot for further customization...
		CategoryPlot plot = chart.getCategoryPlot();

		CategoryAxis domainAxis = plot.getDomainAxis();
		domainAxis.setLowerMargin(0.02);
		domainAxis.setUpperMargin(0.02);
		domainAxis.setLabelFont(LABEL_FONT_BOLD);
		domainAxis.setTickLabelFont(LABEL_FONT);

		// set the range axis to display integers only...
		NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
		rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits(Locale.US));
		rangeAxis.setLabelFont(LABEL_FONT_BOLD);
		rangeAxis.setTickLabelFont(LABEL_FONT);

		// second data set (cumulative percentages)
		CategoryDataset dataset2 = DatasetUtilities.createCategoryDataset("Cumulative (Percent)", cumulative);

		LineAndShapeRenderer renderer2 = new LineAndShapeRenderer();
		renderer2.setSeriesPaint(0, SwingTools.VERY_DARK_BLUE.darker());

		NumberAxis axis2 = new NumberAxis("Percent of " + countValue);
		axis2.setNumberFormatOverride(NumberFormat.getPercentInstance());
		axis2.setLabelFont(LABEL_FONT_BOLD);
		axis2.setTickLabelFont(LABEL_FONT);

		plot.setRangeAxis(1, axis2);
		plot.setDataset(1, dataset2);
		plot.setRenderer(1, renderer2);
		plot.mapDatasetToRangeAxis(1, 1);

		axis2.setTickUnit(new NumberTickUnit(0.1));

		// show grid lines
		plot.setRangeGridlinesVisible(true);

		// bring cumulative line to front
		plot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);

		if (isLabelRotating()) {
			domainAxis.setTickLabelsVisible(true);
			domainAxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 2.0d));
		}

		return chart;
	} else {
		return null;
	}
}
 

/**
 * Creates a sample chart.
 *
 * @param dataset  the dataset.
 *
 * @return The chart.
 */
private static JFreeChart createChart(CategoryDataset dataset) {

    // create the chart...
    JFreeChart chart = ChartFactory.createBarChart(
        "SWTBarChartDemo1",       // chart title
        "Category",               // domain axis label
        "Value",                  // range axis label
        dataset,                  // data
        PlotOrientation.VERTICAL, // orientation
        true,                     // include legend
        true,                     // tooltips?
        false                     // URLs?
    );

    // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

    // get a reference to the plot for further customisation...
    CategoryPlot plot = (CategoryPlot) chart.getPlot();

    // set the range axis to display integers only...
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    // disable bar outlines...
    BarRenderer renderer = (BarRenderer) plot.getRenderer();
    renderer.setDrawBarOutline(false);

    // the SWTGraphics2D class doesn't handle GradientPaint well, so
    // replace the gradient painter from the default theme with a
    // standard painter...
    renderer.setBarPainter(new StandardBarPainter());

    CategoryAxis domainAxis = plot.getDomainAxis();
    domainAxis.setCategoryLabelPositions(
            CategoryLabelPositions.createUpRotationLabelPositions(
                    Math.PI / 6.0));
    // OPTIONAL CUSTOMISATION COMPLETED.

    return chart;

}
 

/**
 * Creates a sample chart.
 *
 * @param dataset  the dataset.
 *
 * @return The chart.
 */
private static JFreeChart createChart(CategoryDataset dataset) {

    // create the chart...
    JFreeChart chart = ChartFactory.createBarChart(
        "SWTBarChartDemo1",       // chart title
        "Category",               // domain axis label
        "Value",                  // range axis label
        dataset,                  // data
        PlotOrientation.VERTICAL, // orientation
        true,                     // include legend
        true,                     // tooltips?
        false                     // URLs?
    );

    // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

    // get a reference to the plot for further customisation...
    CategoryPlot plot = (CategoryPlot) chart.getPlot();

    // set the range axis to display integers only...
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    // disable bar outlines...
    BarRenderer renderer = (BarRenderer) plot.getRenderer();
    renderer.setDrawBarOutline(false);

    // the SWTGraphics2D class doesn't handle GradientPaint well, so
    // replace the gradient painter from the default theme with a
    // standard painter...
    renderer.setBarPainter(new StandardBarPainter());

    CategoryAxis domainAxis = plot.getDomainAxis();
    domainAxis.setCategoryLabelPositions(
            CategoryLabelPositions.createUpRotationLabelPositions(
                    Math.PI / 6.0));
    // OPTIONAL CUSTOMISATION COMPLETED.

    return chart;

}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
public void testEquals() {

    CategoryAxis a1 = new CategoryAxis("Test");
    CategoryAxis a2 = new CategoryAxis("Test");
    assertTrue(a1.equals(a2));

    // lowerMargin
    a1.setLowerMargin(0.15);
    assertFalse(a1.equals(a2));
    a2.setLowerMargin(0.15);
    assertTrue(a1.equals(a2));

    // upperMargin
    a1.setUpperMargin(0.15);
    assertFalse(a1.equals(a2));
    a2.setUpperMargin(0.15);
    assertTrue(a1.equals(a2));

    // categoryMargin
    a1.setCategoryMargin(0.15);
    assertFalse(a1.equals(a2));
    a2.setCategoryMargin(0.15);
    assertTrue(a1.equals(a2));

    // maxCategoryLabelWidthRatio
    a1.setMaximumCategoryLabelWidthRatio(0.98f);
    assertFalse(a1.equals(a2));
    a2.setMaximumCategoryLabelWidthRatio(0.98f);
    assertTrue(a1.equals(a2));

    // categoryLabelPositionOffset
    a1.setCategoryLabelPositionOffset(11);
    assertFalse(a1.equals(a2));
    a2.setCategoryLabelPositionOffset(11);
    assertTrue(a1.equals(a2));

    // categoryLabelPositions
    a1.setCategoryLabelPositions(CategoryLabelPositions.DOWN_45);
    assertFalse(a1.equals(a2));
    a2.setCategoryLabelPositions(CategoryLabelPositions.DOWN_45);
    assertTrue(a1.equals(a2));

    // categoryLabelToolTips
    a1.addCategoryLabelToolTip("Test", "Check");
    assertFalse(a1.equals(a2));
    a2.addCategoryLabelToolTip("Test", "Check");
    assertTrue(a1.equals(a2));

    // tickLabelFont
    a1.setTickLabelFont("C1", new Font("Dialog", Font.PLAIN, 21));
    assertFalse(a1.equals(a2));
    a2.setTickLabelFont("C1", new Font("Dialog", Font.PLAIN, 21));
    assertTrue(a1.equals(a2));

    // tickLabelPaint
    a1.setTickLabelPaint("C1", Color.red);
    assertFalse(a1.equals(a2));
    a2.setTickLabelPaint("C1", Color.red);
    assertTrue(a1.equals(a2));

    // tickLabelPaint2
    a1.setTickLabelPaint("C1", new GradientPaint(1.0f, 2.0f, Color.red,
            3.0f, 4.0f, Color.yellow));
    assertFalse(a1.equals(a2));
    a2.setTickLabelPaint("C1", new GradientPaint(1.0f, 2.0f, Color.red,
            3.0f, 4.0f, Color.yellow));
    assertTrue(a1.equals(a2));

}
 

/**
 * Creates a sample chart.
 *
 * @param dataset  the dataset.
 *
 * @return The chart.
 */
private static JFreeChart createChart(CategoryDataset dataset) {

    // create the chart...
    JFreeChart chart = ChartFactory.createBarChart(
        "SWTBarChartDemo1",       // chart title
        "Category",               // domain axis label
        "Value",                  // range axis label
        dataset,                  // data
        PlotOrientation.VERTICAL, // orientation
        true,                     // include legend
        true,                     // tooltips?
        false                     // URLs?
    );

    // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

    // get a reference to the plot for further customisation...
    CategoryPlot plot = (CategoryPlot) chart.getPlot();

    // set the range axis to display integers only...
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    // disable bar outlines...
    BarRenderer renderer = (BarRenderer) plot.getRenderer();
    renderer.setDrawBarOutline(false);

    // the SWTGraphics2D class doesn't handle GradientPaint well, so
    // replace the gradient painter from the default theme with a
    // standard painter...
    renderer.setBarPainter(new StandardBarPainter());

    CategoryAxis domainAxis = plot.getDomainAxis();
    domainAxis.setCategoryLabelPositions(
            CategoryLabelPositions.createUpRotationLabelPositions(
                    Math.PI / 6.0));
    // OPTIONAL CUSTOMISATION COMPLETED.

    return chart;

}
 

/**
 * Creates a sample chart.
 *
 * @param dataset  the dataset.
 *
 * @return The chart.
 */
private static JFreeChart createChart(CategoryDataset dataset) {

    JFreeChart chart = ChartFactory.createBarChart("Bar Chart Demo 1",
            "Category", "Value", dataset, true);                   
    CategoryPlot plot = (CategoryPlot) chart.getPlot();

    // ******************************************************************
    //  More than 150 demo applications are included with the JFreeChart
    //  Developer Guide...for more information, see:
    //
    //  >   http://www.object-refinery.com/jfreechart/guide.html
    //
    // ******************************************************************

    // set the range axis to display integers only...
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    // disable bar outlines...
    BarRenderer renderer = (BarRenderer) plot.getRenderer();
    renderer.setDrawBarOutline(false);

    // set up gradient paints for series...
    GradientPaint gp0 = new GradientPaint(0.0f, 0.0f, Color.blue,
            0.0f, 0.0f, new Color(0, 0, 64));
    GradientPaint gp1 = new GradientPaint(0.0f, 0.0f, Color.green,
            0.0f, 0.0f, new Color(0, 64, 0));
    GradientPaint gp2 = new GradientPaint(0.0f, 0.0f, Color.red,
            0.0f, 0.0f, new Color(64, 0, 0));
    renderer.setSeriesPaint(0, gp0);
    renderer.setSeriesPaint(1, gp1);
    renderer.setSeriesPaint(2, gp2);

    CategoryAxis domainAxis = plot.getDomainAxis();
    domainAxis.setCategoryLabelPositions(
            CategoryLabelPositions.createUpRotationLabelPositions(
                    Math.PI / 6.0));

    return chart;

}
 

/**
 * Creates a sample chart.
 * 
 * @param dataset  the dataset.
 * 
 * @return The chart.
 */
private static JFreeChart createChart(CategoryDataset dataset) {
    
    // create the chart...
    JFreeChart chart = ChartFactory.createBarChart(
        "Bar Chart Demo",         // chart title
        "Category",               // domain axis label
        "Value",                  // range axis label
        dataset,                  // data
        PlotOrientation.VERTICAL, // orientation
        true,                     // include legend
        true,                     // tooltips?
        false                     // URLs?
    );

    // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

    // set the background color for the chart...
    chart.setBackgroundPaint(Color.white);

    // get a reference to the plot for further customisation...
    CategoryPlot plot = (CategoryPlot) chart.getPlot();
    plot.setBackgroundPaint(Color.lightGray);
    plot.setDomainGridlinePaint(Color.white);
    plot.setDomainGridlinesVisible(true);
    plot.setRangeGridlinePaint(Color.white);

    // set the range axis to display integers only...
    final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    // disable bar outlines...
    BarRenderer renderer = (BarRenderer) plot.getRenderer();
    renderer.setDrawBarOutline(false);

    CategoryAxis domainAxis = plot.getDomainAxis();
    domainAxis.setCategoryLabelPositions(
        CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 6.0)
    );
    // OPTIONAL CUSTOMISATION COMPLETED.
    
    return chart;
    
}
 

/**
 * Creates a sample chart.
 * 
 * @param dataset  the dataset.
 * 
 * @return The chart.
 */
private static JFreeChart createChart(CategoryDataset dataset) {
    
    // create the chart...
    JFreeChart chart = ChartFactory.createBarChart(
        "Bar Chart Demo 1",       // chart title
        "Category",               // domain axis label
        "Value",                  // range axis label
        dataset,                  // data
        PlotOrientation.VERTICAL, // orientation
        true,                     // include legend
        true,                     // tooltips?
        false                     // URLs?
    );

    // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

    // set the background color for the chart...
    chart.setBackgroundPaint(Color.white);

    // get a reference to the plot for further customisation...
    CategoryPlot plot = (CategoryPlot) chart.getPlot();
    plot.setBackgroundPaint(Color.lightGray);
    plot.setDomainGridlinePaint(Color.white);
    plot.setDomainGridlinesVisible(true);
    plot.setRangeGridlinePaint(Color.white);

    // ******************************************************************
    //  More than 150 demo applications are included with the JFreeChart
    //  Developer Guide...for more information, see:
    //
    //  >   http://www.object-refinery.com/jfreechart/guide.html
    //
    // ******************************************************************
    
    // set the range axis to display integers only...
    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    // disable bar outlines...
    BarRenderer renderer = (BarRenderer) plot.getRenderer();
    renderer.setDrawBarOutline(false);
    
    // set up gradient paints for series...
    GradientPaint gp0 = new GradientPaint(0.0f, 0.0f, Color.blue, 
            0.0f, 0.0f, new Color(0, 0, 64));
    GradientPaint gp1 = new GradientPaint(0.0f, 0.0f, Color.green, 
            0.0f, 0.0f, new Color(0, 64, 0));
    GradientPaint gp2 = new GradientPaint(0.0f, 0.0f, Color.red, 
            0.0f, 0.0f, new Color(64, 0, 0));
    renderer.setSeriesPaint(0, gp0);
    renderer.setSeriesPaint(1, gp1);
    renderer.setSeriesPaint(2, gp2);

    CategoryAxis domainAxis = plot.getDomainAxis();
    domainAxis.setCategoryLabelPositions(
            CategoryLabelPositions.createUpRotationLabelPositions(
                    Math.PI / 6.0));
    // OPTIONAL CUSTOMISATION COMPLETED.
    
    return chart;
    
}
 

private byte[] generateStackedAreaChart (CategoryDataset dataset, int width, int height)
{
	JFreeChart chart = ChartFactory.createStackedAreaChart (null, // chart title
			null, // domain axis label
			null, // range axis label
			dataset, // data
			PlotOrientation.VERTICAL, // the plot orientation
			true, // legend
			true, // tooltips
			false // urls
			);

	// set background
	chart.setBackgroundPaint (parseColor (statsManager.getChartBackgroundColor ()));

	// set chart border
	chart.setPadding (new RectangleInsets (10, 5, 5, 5));
	chart.setBorderVisible (true);
	chart.setBorderPaint (parseColor ("#cccccc"));

	// set anti alias
	chart.setAntiAlias (true);

	CategoryPlot plot = (CategoryPlot) chart.getPlot ();

	// set transparency
	plot.setForegroundAlpha (0.7f);
	plot.setAxisOffset (new RectangleInsets (5.0, 5.0, 5.0, 5.0));
	plot.setBackgroundPaint (Color.lightGray);
	plot.setDomainGridlinesVisible (true);
	plot.setDomainGridlinePaint (Color.white);
	plot.setRangeGridlinesVisible (true);
	plot.setRangeGridlinePaint (Color.white);

	// set colour of regular users using Karate belt colour: white, green, blue, brown, black/gold
	CategoryItemRenderer renderer = plot.getRenderer ();
	renderer.setSeriesPaint (0, new Color (205, 173, 0)); // gold users
	renderer.setSeriesPaint (1, new Color (139, 69, 19));
	renderer.setSeriesPaint (2, Color.BLUE);
	renderer.setSeriesPaint (3, Color.GREEN);
	renderer.setSeriesPaint (4, Color.WHITE);

	// set the range axis to display integers only...
	NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis ();
	rangeAxis.setStandardTickUnits (NumberAxis.createIntegerTickUnits ());

	CategoryAxis domainAxis = (CategoryAxis) plot.getDomainAxis ();
	domainAxis.setCategoryLabelPositions (CategoryLabelPositions.DOWN_45);
       domainAxis.setLowerMargin(0.0);
       domainAxis.setUpperMargin(0.0);

       BufferedImage img = chart.createBufferedImage (width, height);
	final ByteArrayOutputStream out = new ByteArrayOutputStream();
	try{
		ImageIO.write(img, "png", out);
	}catch(IOException e){
		log.warn("Error occurred while generating SiteStats chart image data", e);
	}
	return out.toByteArray();
}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
public void testEquals() {
    
    CategoryAxis a1 = new CategoryAxis("Test");
    CategoryAxis a2 = new CategoryAxis("Test");
    assertTrue(a1.equals(a2));
    
    // lowerMargin 
    a1.setLowerMargin(0.15);
    assertFalse(a1.equals(a2));
    a2.setLowerMargin(0.15);
    assertTrue(a1.equals(a2));

    // upperMargin 
    a1.setUpperMargin(0.15);
    assertFalse(a1.equals(a2));
    a2.setUpperMargin(0.15);
    assertTrue(a1.equals(a2));
  
    // categoryMargin 
    a1.setCategoryMargin(0.15);
    assertFalse(a1.equals(a2));
    a2.setCategoryMargin(0.15);
    assertTrue(a1.equals(a2));
    
    // maxCategoryLabelWidthRatio
    a1.setMaximumCategoryLabelWidthRatio(0.98f);
    assertFalse(a1.equals(a2));
    a2.setMaximumCategoryLabelWidthRatio(0.98f);
    assertTrue(a1.equals(a2));
    
    // categoryLabelPositionOffset
    a1.setCategoryLabelPositionOffset(11);
    assertFalse(a1.equals(a2));
    a2.setCategoryLabelPositionOffset(11);
    assertTrue(a1.equals(a2));
    
    // categoryLabelPositions
    a1.setCategoryLabelPositions(CategoryLabelPositions.DOWN_45);
    assertFalse(a1.equals(a2));
    a2.setCategoryLabelPositions(CategoryLabelPositions.DOWN_45);
    assertTrue(a1.equals(a2));
    
    // categoryLabelToolTips
    a1.addCategoryLabelToolTip("Test", "Check");
    assertFalse(a1.equals(a2));
    a2.addCategoryLabelToolTip("Test", "Check");
    assertTrue(a1.equals(a2));
    
    // tickLabelFont
    a1.setTickLabelFont("C1", new Font("Dialog", Font.PLAIN, 21));
    assertFalse(a1.equals(a2));
    a2.setTickLabelFont("C1", new Font("Dialog", Font.PLAIN, 21));
    assertTrue(a1.equals(a2));
    
    // tickLabelPaint
    a1.setTickLabelPaint("C1", Color.red);
    assertFalse(a1.equals(a2));
    a2.setTickLabelPaint("C1", Color.red);
    assertTrue(a1.equals(a2));

    // tickLabelPaint2
    a1.setTickLabelPaint("C1", new GradientPaint(1.0f, 2.0f, Color.red, 
            3.0f, 4.0f, Color.yellow));
    assertFalse(a1.equals(a2));
    a2.setTickLabelPaint("C1", new GradientPaint(1.0f, 2.0f, Color.red, 
            3.0f, 4.0f, Color.yellow));
    assertTrue(a1.equals(a2));

}
 

/**
 * Creates a sample chart.
 * 
 * @param dataset  the dataset.
 * 
 * @return The chart.
 */
private static JFreeChart createChart(CategoryDataset dataset) {
    
    // create the chart...
    JFreeChart chart = ChartFactory.createBarChart(
        "Bar Chart Demo 1",       // chart title
        "Category",               // domain axis label
        "Value",                  // range axis label
        dataset,                  // data
        PlotOrientation.VERTICAL, // orientation
        true,                     // include legend
        true,                     // tooltips?
        false                     // URLs?
    );

    // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

    // set the background color for the chart...
    chart.setBackgroundPaint(Color.white);

    // get a reference to the plot for further customisation...
    CategoryPlot plot = chart.getCategoryPlot();
    plot.setBackgroundPaint(Color.lightGray);
    plot.setDomainGridlinePaint(Color.white);
    plot.setDomainGridlinesVisible(true);
    plot.setRangeGridlinePaint(Color.white);

    // ******************************************************************
    //  More than 150 demo applications are included with the JFreeChart
    //  Developer Guide...for more information, see:
    //
    //  >   http://www.object-refinery.com/jfreechart/guide.html
    //
    // ******************************************************************
    
    // set the range axis to display integers only...
    final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    // disable bar outlines...
    BarRenderer renderer = (BarRenderer) plot.getRenderer();
    renderer.setDrawBarOutline(false);
    
    // set up gradient paints for series...
    GradientPaint gp0 = new GradientPaint(0.0f, 0.0f, Color.blue, 
            0.0f, 0.0f, new Color(0, 0, 64));
    GradientPaint gp1 = new GradientPaint(0.0f, 0.0f, Color.green, 
            0.0f, 0.0f, new Color(0, 64, 0));
    GradientPaint gp2 = new GradientPaint(0.0f, 0.0f, Color.red, 
            0.0f, 0.0f, new Color(64, 0, 0));
    renderer.setSeriesPaint(0, gp0);
    renderer.setSeriesPaint(1, gp1);
    renderer.setSeriesPaint(2, gp2);

    CategoryAxis domainAxis = plot.getDomainAxis();
    domainAxis.setCategoryLabelPositions(
            CategoryLabelPositions.createUpRotationLabelPositions(
                    Math.PI / 6.0));
    // OPTIONAL CUSTOMISATION COMPLETED.
    
    return chart;
    
}