Example usage for org.jfree.chart JFreeChart setAntiAlias

Introduction

In this page you can find the example usage for org.jfree.chart JFreeChart setAntiAlias.

Prototype

public void setAntiAlias(boolean flag) 

Source Link

Document

Sets a flag that indicates whether or not anti-aliasing is used when the chart is drawn.

Usage

From source file:ru.spbspu.viewer.DataView.java

public void buildFullOscillogram() {
    CategoryTableXYDataset serie = new CategoryTableXYDataset();
    serie.setNotify(false);/* w ww. j a v  a2s . co  m*/
    double step = 1.0 / getDiscretization();
    double startPosition = step * getFramePosition();
    double[] data = _presenter.getFullData();
    for (int i = 0; i < data.length; i++) {
        serie.add(startPosition, data[i], "");
        startPosition += step;
    }
    JFreeChart chart = ChartFactory.createXYLineChart("", "t,c", "g, /c^2", serie);
    chart.removeLegend();
    chart.setAntiAlias(false);

    XYPlot plot = chart.getXYPlot();
    //plot.setRangeGridlinePaint(Color.BLACK);
    org.jfree.chart.axis.ValueAxis yAxis = plot.getRangeAxis();
    yAxis.setRange(_presenter.getMinMaxRange());
    org.jfree.chart.axis.ValueAxis xAxis = plot.getDomainAxis();
    double start = getFramePosition() * 1.0 / getDiscretization();
    double max = start + getFrameWidth() * 1.0 / getDiscretization();
    xAxis.setRange(start, max);
    ChartPanel chartPanel = new ChartPanel(chart);
    drawGraphOfSignal(chartPanel);
}

---

From source file:ru.spbspu.viewer.DataView.java

/**
 * ? ? ? ?/*from ww w. ja  va2s .  c o  m*/
 */
public void buildFullEnergyGraph() {
    CategoryTableXYDataset serie = new CategoryTableXYDataset();
    serie.setNotify(false);
    double step = 1.0 / getDiscretization() * Integer.parseInt(spinnerWindowWidth.getValue().toString()) / 2;
    double startPosition = 0;
    double[] data = _presenter.getFullFrameEnergy(getWindowWidth());
    for (int i = 0; i < data.length; i++) {
        serie.add(startPosition, data[i], "");
        startPosition += step;
    }
    JFreeChart chart = ChartFactory.createXYLineChart("", "", "t,c", serie);
    chart.removeLegend();
    chart.setAntiAlias(false);

    XYPlot plot = chart.getXYPlot();
    AxisSpace space = new AxisSpace();
    space.setLeft(GRAPHIC_SPACE.getLeft() - 8);
    plot.setFixedRangeAxisSpace(space);
    org.jfree.chart.axis.ValueAxis yAxis = plot.getRangeAxis();
    String selection = scaling.getSelection().getActionCommand();
    switch (selection) {
    case "max": {
        yAxis.setRange(_presenter.getMinMaxRangeEnergy());
    }
        break;
    case "mean": {
        yAxis.setRange(_presenter.getMeanRangeEnergy());
    }
        break;
    case "auto":
        break;
    }
    org.jfree.chart.axis.ValueAxis xAxis = plot.getDomainAxis();
    double start = 0;
    double max = _presenter.getFullData().length / Double.valueOf(spinnerDiscretization.getValue().toString());
    xAxis.setRange(start, max);
    ChartPanel chartPanel = new ChartPanel(chart);
    drawFullGraphOfEnergy(chartPanel);
}

---

From source file:ru.spbspu.viewer.DataView.java

/**
 * ? ?    /*w  ww  .ja v  a  2s .  c  o m*/
 */
public void buildEnergyGraph() {
    CategoryTableXYDataset serie = new CategoryTableXYDataset();
    serie.setNotify(false);
    double step = 1.0 / getDiscretization();
    double startPosition = step * getFramePosition();
    double[] data = _presenter.getFrameEnergy(getFramePosition(), getFrameWidth(), getWindowWidth());
    for (int i = 0; i < data.length; i++) {
        serie.add(startPosition, data[i], "");
        startPosition += step * getFrameWidth() / (data.length - 1);
    }
    JFreeChart chart = ChartFactory.createXYLineChart("", "t,c", "", serie);
    chart.removeLegend();
    chart.setAntiAlias(false);

    XYPlot plot = chart.getXYPlot();
    org.jfree.chart.axis.ValueAxis yAxis = plot.getRangeAxis();
    String selection = scaling.getSelection().getActionCommand();
    switch (selection) {
    case "max": {
        yAxis.setRange(_presenter.getMinMaxRangeEnergy());
    }
        break;
    case "mean": {
        yAxis.setRange(_presenter.getMeanRangeEnergy());
    }
        break;
    case "auto":
        break;
    }

    plot.setFixedRangeAxisSpace(GRAPHIC_SPACE);
    org.jfree.chart.axis.ValueAxis xAxis = plot.getDomainAxis();
    double start = getFramePosition() * 1.0 / getDiscretization();
    double max = start + getFrameWidth() * 1.0 / getDiscretization();
    xAxis.setRange(start, max);
    //        yAxis.setRange(3.99, 4.01);
    ChartPanel chartPanel = new ChartPanel(chart);
    drawGraphOfEnergy(chartPanel);

}

---

From source file:ru.spbspu.viewer.DataView.java

/**
 * ? ?    /*from   w ww  . j  a va  2s  . c o  m*/
 */
public void buildOscillogram() {
    CategoryTableXYDataset serie = new CategoryTableXYDataset();
    serie.setNotify(false);
    double step = 1.0 / getDiscretization();
    double startPosition = step * getFramePosition();
    double[] data = null;
    if (LPF.isSelected()) {
        data = _presenter.lpFilter(_presenter.getFrameData(getFramePosition(), getFrameWidth()),
                Double.parseDouble(spinnerLimitFreq.getValue().toString()));
    } else {
        data = _presenter.getFrameData(getFramePosition(), getFrameWidth());
    }

    for (int i = 0; i < data.length; i++) {
        serie.add(startPosition, data[i], "");
        startPosition += step;
    }
    JFreeChart chart = ChartFactory.createXYLineChart("", "t,c", "g, /c^2", serie);
    chart.removeLegend();
    chart.setAntiAlias(false);

    XYPlot plot = chart.getXYPlot();
    plot.setFixedRangeAxisSpace(GRAPHIC_SPACE);
    //plot.setRangeGridlinePaint(Color.BLACK);
    org.jfree.chart.axis.ValueAxis yAxis = plot.getRangeAxis();
    Range range = _presenter.getMinMaxRange();
    if (range.getLength() > 0) {
        yAxis.setRange(range);
    }
    org.jfree.chart.axis.ValueAxis xAxis = plot.getDomainAxis();
    double start = getFramePosition() * 1.0 / getDiscretization();
    double max = start + getFrameWidth() * 1.0 / getDiscretization();
    xAxis.setRange(start, max);
    ChartPanel chartPanel = new ChartPanel(chart);
    drawGraphOfSignal(chartPanel);
}

---

From source file:org.sakaiproject.sitestats.impl.ServerWideReportManagerImpl.java

private byte[] createWeeklyLoginChart(int width, int height) {
    IntervalXYDataset dataset1 = getWeeklyLoginsDataSet();
    IntervalXYDataset dataset2 = getWeeklySiteUserDataSet();

    if ((dataset1 == null) || (dataset2 == null)) {
        return generateNoDataChart(width, height);
    }//from w  ww.ja  va  2 s .  co m

    // create plot ...
    XYItemRenderer renderer1 = new XYLineAndShapeRenderer(true, false);
    renderer1.setSeriesStroke(0, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer1.setSeriesStroke(1, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer1.setSeriesPaint(0, Color.RED);
    renderer1.setSeriesPaint(0, Color.BLUE);

    DateAxis domainAxis = new DateAxis("");
    domainAxis.setTickUnit(new DateTickUnit(DateTickUnit.DAY, 7, new SimpleDateFormat("yyyy-MM-dd")));
    domainAxis.setTickMarkPosition(DateTickMarkPosition.START);
    domainAxis.setVerticalTickLabels(true);
    domainAxis.setLowerMargin(0.01);
    domainAxis.setUpperMargin(0.01);

    NumberAxis rangeAxis = new NumberAxis("count");
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    XYPlot plot1 = new XYPlot(dataset1, null, rangeAxis, renderer1);
    plot1.setBackgroundPaint(Color.lightGray);
    plot1.setDomainGridlinePaint(Color.white);
    plot1.setRangeGridlinePaint(Color.white);

    // add a second dataset and renderer...
    XYItemRenderer renderer2 = new XYLineAndShapeRenderer(true, false);
    renderer2.setSeriesStroke(0, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer2.setSeriesStroke(1, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer2.setSeriesStroke(2, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer2.setSeriesPaint(0, Color.GREEN);
    renderer2.setSeriesPaint(1, Color.BLACK);
    renderer2.setSeriesPaint(2, Color.CYAN);

    rangeAxis = new NumberAxis("count");
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    XYPlot plot2 = new XYPlot(dataset2, null, rangeAxis, renderer2);
    plot2.setBackgroundPaint(Color.lightGray);
    plot2.setDomainGridlinePaint(Color.white);
    plot2.setRangeGridlinePaint(Color.white);

    CombinedDomainXYPlot cplot = new CombinedDomainXYPlot(domainAxis);
    cplot.add(plot1, 3);
    cplot.add(plot2, 2);
    cplot.setGap(8.0);
    cplot.setDomainGridlinePaint(Color.white);
    cplot.setDomainGridlinesVisible(true);

    // return a new chart containing the overlaid plot...
    JFreeChart chart = new JFreeChart(null, JFreeChart.DEFAULT_TITLE_FONT, cplot, false);
    LegendTitle legend = new LegendTitle(cplot);
    chart.addSubtitle(legend);

    // 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);

    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();
}

---

From source file:org.sakaiproject.sitestats.impl.ServerWideReportManagerImpl.java

private byte[] createDailyLoginChart(int width, int height) {
    IntervalXYDataset dataset1 = getDailyLoginsDataSet();
    IntervalXYDataset dataset2 = getDailySiteUserDataSet();

    if ((dataset1 == null) || (dataset2 == null)) {
        return generateNoDataChart(width, height);
    }/*from   ww  w  .ja  va  2 s.c  o m*/

    // create plot ...
    XYItemRenderer renderer1 = new XYLineAndShapeRenderer(true, false);
    renderer1.setSeriesPaint(0, Color.RED);
    renderer1.setSeriesPaint(1, Color.BLUE);
    renderer1.setSeriesPaint(2, Color.RED);
    renderer1.setSeriesPaint(3, Color.BLUE);
    renderer1.setSeriesStroke(0, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer1.setSeriesStroke(1, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    BasicStroke dashLineStroke = new BasicStroke(2, BasicStroke.CAP_BUTT, BasicStroke.JOIN_ROUND, 0,
            new float[] { 4 }, 0);
    renderer1.setSeriesStroke(2, dashLineStroke);
    renderer1.setSeriesStroke(3, dashLineStroke);

    DateAxis domainAxis = new DateAxis("");
    domainAxis.setTickUnit(new DateTickUnit(DateTickUnit.DAY, 7, new SimpleDateFormat("yyyy-MM-dd")));
    domainAxis.setTickMarkPosition(DateTickMarkPosition.START);
    domainAxis.setVerticalTickLabels(true);
    domainAxis.setLowerMargin(0.01);
    domainAxis.setUpperMargin(0.01);

    NumberAxis rangeAxis = new NumberAxis("count");
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    XYPlot plot1 = new XYPlot(dataset1, null, rangeAxis, renderer1);
    plot1.setBackgroundPaint(Color.lightGray);
    plot1.setDomainGridlinePaint(Color.white);
    plot1.setRangeGridlinePaint(Color.white);

    // add a second dataset and renderer...
    XYItemRenderer renderer2 = new XYLineAndShapeRenderer(true, false);
    renderer2.setSeriesStroke(0, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer2.setSeriesStroke(1, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer2.setSeriesStroke(2, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer2.setSeriesPaint(0, Color.GREEN);
    renderer2.setSeriesPaint(1, Color.BLACK);
    renderer2.setSeriesPaint(2, Color.CYAN);

    rangeAxis = new NumberAxis("count");
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    XYPlot plot2 = new XYPlot(dataset2, null, rangeAxis, renderer2);
    plot2.setBackgroundPaint(Color.lightGray);
    plot2.setDomainGridlinePaint(Color.white);
    plot2.setRangeGridlinePaint(Color.white);

    CombinedDomainXYPlot cplot = new CombinedDomainXYPlot(domainAxis);
    cplot.add(plot1, 3);
    cplot.add(plot2, 2);
    cplot.setGap(8.0);
    cplot.setDomainGridlinePaint(Color.white);
    cplot.setDomainGridlinesVisible(true);

    // return a new chart containing the overlaid plot...
    JFreeChart chart = new JFreeChart(null, JFreeChart.DEFAULT_TITLE_FONT, cplot, false);
    LegendTitle legend = new LegendTitle(cplot);
    chart.addSubtitle(legend);

    // 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);

    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();
}

---

From source file:org.sakaiproject.sitestats.impl.ServerWideReportManagerImpl.java

private byte[] createMonthlyLoginChart(int width, int height) {
    IntervalXYDataset dataset1 = getMonthlyLoginsDataSet();
    IntervalXYDataset dataset3 = getMonthlySiteUserDataSet();

    if ((dataset1 == null) || (dataset3 == null)) {
        return generateNoDataChart(width, height);
    }//from  w  ww. j a v  a2s.c  om

    // create plot ...
    XYItemRenderer renderer1 = new XYLineAndShapeRenderer(true, false);
    renderer1.setSeriesStroke(0, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer1.setSeriesPaint(0, Color.RED);

    DateAxis domainAxis = new DateAxis("");
    domainAxis.setTickUnit(new DateTickUnit(DateTickUnit.MONTH, 1, new SimpleDateFormat("yyyy-MM")));
    domainAxis.setTickMarkPosition(DateTickMarkPosition.START);
    domainAxis.setVerticalTickLabels(true);
    domainAxis.setLowerMargin(0.01);
    domainAxis.setUpperMargin(0.01);

    NumberAxis axis1 = new NumberAxis("Total Logins");
    axis1.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
    axis1.setLabelPaint(Color.RED);
    axis1.setTickLabelPaint(Color.RED);

    XYPlot plot1 = new XYPlot(dataset1, null, axis1, renderer1);
    plot1.setBackgroundPaint(Color.lightGray);
    plot1.setDomainGridlinePaint(Color.white);
    plot1.setRangeGridlinePaint(Color.white);

    // AXIS 2
    /*
    NumberAxis axis2 = new NumberAxis("Total Unique Users");
    axis2.setStandardTickUnits (NumberAxis.createIntegerTickUnits ());
    axis2.setLabelPaint(Color.BLUE);
    axis2.setTickLabelPaint(Color.BLUE);
    plot1.setRangeAxis(1, axis2);
            
    plot1.setDataset(1, dataset2);
    plot1.mapDatasetToRangeAxis(1, 1);
    XYItemRenderer renderer2 = new XYLineAndShapeRenderer(true, false);
    renderer2.setSeriesStroke(0, new BasicStroke(2.0f, 
        BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer2.setSeriesPaint (0, Color.BLUE);
    plot1.setRenderer(1, renderer2);
    */

    // add a third dataset and renderer...
    XYItemRenderer renderer3 = new XYLineAndShapeRenderer(true, false);
    renderer3.setSeriesStroke(0, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer3.setSeriesStroke(1, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer3.setSeriesStroke(2, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL));
    renderer3.setSeriesPaint(0, Color.GREEN);
    renderer3.setSeriesPaint(1, Color.BLACK);
    renderer3.setSeriesPaint(2, Color.CYAN);

    axis1 = new NumberAxis("count");
    axis1.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

    XYPlot plot2 = new XYPlot(dataset3, null, axis1, renderer3);
    plot2.setBackgroundPaint(Color.lightGray);
    plot2.setDomainGridlinePaint(Color.white);
    plot2.setRangeGridlinePaint(Color.white);

    CombinedDomainXYPlot cplot = new CombinedDomainXYPlot(domainAxis);
    cplot.add(plot1, 3);
    cplot.add(plot2, 2);
    cplot.setGap(8.0);
    cplot.setDomainGridlinePaint(Color.white);
    cplot.setDomainGridlinesVisible(true);

    // return a new chart containing the overlaid plot...
    JFreeChart chart = new JFreeChart(null, JFreeChart.DEFAULT_TITLE_FONT, cplot, false);
    LegendTitle legend = new LegendTitle(cplot);
    chart.addSubtitle(legend);

    // 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);

    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();
}

---

From source file:net.sourceforge.processdash.ui.web.psp.TimeLogPhaseWaterfallChart.java

private JFreeChart createChart(IntervalXYDataset dataset, ProcessUtil process, List<String> phases,
        GapSkipTracker gaps) {/*ww  w . j av  a 2  s  . co m*/
    JFreeChart result = ChartFactory.createXYBarChart(null, null, true, null, dataset, PlotOrientation.VERTICAL,
            false, true, false);

    XYPlot xyplot = (XYPlot) result.getPlot();
    DateAxis dateAxis = new DateAxis(null);
    dateAxis.setTickMarksVisible(false);
    dateAxis.setTickLabelsVisible(false);
    dateAxis.setLowerMargin(0.01);
    dateAxis.setUpperMargin(0.01);
    setupGaps(gaps, dateAxis, xyplot);
    xyplot.setDomainAxis(dateAxis);

    String[] phaseNameList = new String[phases.size()];
    for (int i = 0; i < phaseNameList.length; i++)
        phaseNameList[i] = Translator.translate(phases.get(i));
    SymbolAxis symbolaxis = new SymbolAxis(null, phaseNameList);
    symbolaxis.setGridBandsVisible(false);
    xyplot.setRangeAxis(symbolaxis);

    final XYBarRenderer renderer = (XYBarRenderer) xyplot.getRenderer();
    renderer.setUseYInterval(true);
    renderer.setDrawBarOutline(true);
    renderer.setBaseOutlinePaint(Color.black);

    new PhaseChartColorer(process, phases) {
        public void setItemColor(Object key, int pos, Color c) {
            renderer.setSeriesPaint(pos, c);
        }
    }.run();

    int exceptionSeries = dataset.getSeriesCount() - 1;
    renderer.setSeriesPaint(exceptionSeries, EXCEPTION_PAINT);
    renderer.setSeriesFillPaint(exceptionSeries, EXCEPTION_PAINT);
    renderer.setSeriesOutlinePaint(exceptionSeries, EXCEPTION_PAINT);

    renderer.setBaseToolTipGenerator(new TooltipGenerator());

    xyplot.setBackgroundPaint(Color.white);
    xyplot.setDomainGridlinesVisible(false);
    xyplot.setRangeGridlinePaint(Color.lightGray);
    xyplot.setDrawingSupplier(DRAWING_SUPPLIER_FACTORY.newDrawingSupplier());

    result.setAntiAlias(false);
    result.setTextAntiAlias(true);

    parameters.put("title", resources.getString("Title"));

    return result;
}

---

From source file:org.sakaiproject.sitestats.impl.ServerWideReportManagerImpl.java

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
    );/*w  w  w.  j av a  2s. c o  m*/

    // 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();
}

---

From source file:org.sakaiproject.sitestats.impl.ServerWideReportManagerImpl.java

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
    );// w  w  w  . j  a va 2s .  com

    // 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();
}

---

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