Example usage for org.jfree.chart.renderer.xy AbstractXYItemRenderer setItemLabelGenerator

Introduction

In this page you can find the example usage for org.jfree.chart.renderer.xy AbstractXYItemRenderer setItemLabelGenerator.

Prototype

@Override
public void setItemLabelGenerator(XYItemLabelGenerator generator) 

Source Link

Document

Sets the item label generator for ALL series and sends a RendererChangeEvent to all registered listeners.

Usage

From source file:org.sakaiproject.sitestats.impl.chart.ChartServiceImpl.java

private byte[] generateTimeSeriesChart(String siteId, IntervalXYDataset dataset, int width, int height,
        boolean renderBar, float transparency, boolean itemLabelsVisible, boolean smallFontInDomainAxis,
        String timePeriod, Date firstDate, Date lastDate) {
    JFreeChart chart = null;//  www .  j a  v a  2 s  .c o m
    if (!renderBar) {
        chart = ChartFactory.createTimeSeriesChart(null, null, null, dataset, true, false, false);
    } else {
        chart = ChartFactory.createXYBarChart(null, null, true, null, dataset, PlotOrientation.VERTICAL, true,
                false, false);
    }
    XYPlot plot = (XYPlot) chart.getPlot();

    // set transparency
    plot.setForegroundAlpha(transparency);

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

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

    // set antialias
    chart.setAntiAlias(true);

    // set domain axis font size
    if (smallFontInDomainAxis && !canUseNormalFontSize(width)) {
        plot.getDomainAxis().setTickLabelFont(new Font("SansSerif", Font.PLAIN, 8));
    }

    // configure date display (localized) in domain axis
    Locale locale = msgs.getLocale();
    PeriodAxis periodaxis = new PeriodAxis(null);
    Class timePeriodClass = null;
    if (dataset instanceof TimeSeriesCollection) {
        TimeSeriesCollection tsc = (TimeSeriesCollection) dataset;
        if (tsc.getSeriesCount() > 0) {
            timePeriodClass = tsc.getSeries(0).getTimePeriodClass();
        } else {
            timePeriodClass = org.jfree.data.time.Day.class;
        }
        periodaxis.setAutoRangeTimePeriodClass(timePeriodClass);
    }
    PeriodAxisLabelInfo aperiodaxislabelinfo[] = null;
    if (StatsManager.CHARTTIMESERIES_WEEKDAY.equals(timePeriod)) {
        aperiodaxislabelinfo = new PeriodAxisLabelInfo[2];
        aperiodaxislabelinfo[0] = new PeriodAxisLabelInfo(org.jfree.data.time.Day.class,
                new SimpleDateFormat("E", locale));
        aperiodaxislabelinfo[1] = new PeriodAxisLabelInfo(org.jfree.data.time.Day.class,
                new SimpleDateFormat("d", locale));
    } else if (StatsManager.CHARTTIMESERIES_DAY.equals(timePeriod)) {
        aperiodaxislabelinfo = new PeriodAxisLabelInfo[3];
        aperiodaxislabelinfo[0] = new PeriodAxisLabelInfo(org.jfree.data.time.Day.class,
                new SimpleDateFormat("d", locale));
        aperiodaxislabelinfo[1] = new PeriodAxisLabelInfo(org.jfree.data.time.Month.class,
                new SimpleDateFormat("MMM", locale));
        aperiodaxislabelinfo[2] = new PeriodAxisLabelInfo(org.jfree.data.time.Year.class,
                new SimpleDateFormat("yyyy", locale));
    } else if (StatsManager.CHARTTIMESERIES_MONTH.equals(timePeriod)) {
        aperiodaxislabelinfo = new PeriodAxisLabelInfo[2];
        aperiodaxislabelinfo[0] = new PeriodAxisLabelInfo(org.jfree.data.time.Month.class,
                new SimpleDateFormat("MMM", locale));
        aperiodaxislabelinfo[1] = new PeriodAxisLabelInfo(org.jfree.data.time.Year.class,
                new SimpleDateFormat("yyyy", locale));
    } else if (StatsManager.CHARTTIMESERIES_YEAR.equals(timePeriod)) {
        aperiodaxislabelinfo = new PeriodAxisLabelInfo[1];
        aperiodaxislabelinfo[0] = new PeriodAxisLabelInfo(org.jfree.data.time.Year.class,
                new SimpleDateFormat("yyyy", locale));
    }
    periodaxis.setLabelInfo(aperiodaxislabelinfo);
    // date range
    if (firstDate != null || lastDate != null) {
        periodaxis.setAutoRange(false);
        if (firstDate != null) {
            if (StatsManager.CHARTTIMESERIES_MONTH.equals(timePeriod)
                    || StatsManager.CHARTTIMESERIES_YEAR.equals(timePeriod)) {
                periodaxis.setFirst(new org.jfree.data.time.Month(firstDate));
            } else {
                periodaxis.setFirst(new org.jfree.data.time.Day(firstDate));
            }
        }
        if (lastDate != null) {
            if (StatsManager.CHARTTIMESERIES_MONTH.equals(timePeriod)
                    || StatsManager.CHARTTIMESERIES_YEAR.equals(timePeriod)) {
                periodaxis.setLast(new org.jfree.data.time.Month(lastDate));
            } else {
                periodaxis.setLast(new org.jfree.data.time.Day(lastDate));
            }
        }
    }
    periodaxis.setTickMarkOutsideLength(0.0F);
    plot.setDomainAxis(periodaxis);

    // set outline
    AbstractXYItemRenderer renderer = (AbstractXYItemRenderer) plot.getRenderer();
    if (renderer instanceof XYLineAndShapeRenderer) {
        XYLineAndShapeRenderer r = (XYLineAndShapeRenderer) renderer;
        r.setDrawSeriesLineAsPath(true);
        r.setShapesVisible(true);
        r.setShapesFilled(true);
    } else if (renderer instanceof XYBarRenderer) {
        //XYBarRenderer r = (XYBarRenderer) renderer;
        ClusteredXYBarRenderer r = new ClusteredXYBarRenderer();
        r.setDrawBarOutline(true);
        if (smallFontInDomainAxis && !canUseNormalFontSize(width))
            r.setMargin(0.05);
        else
            r.setMargin(0.10);
        plot.setRenderer(r);
        renderer = r;
    }

    // item labels
    if (itemLabelsVisible) {
        plot.getRangeAxis().setUpperMargin(0.2);
        renderer.setItemLabelGenerator(new XYItemLabelGenerator() {
            private static final long serialVersionUID = 1L;

            public String generateLabel(XYDataset dataset, int series, int item) {
                Number n = dataset.getY(series, item);
                if (n.doubleValue() != 0)
                    return n.toString();
                return "";
            }

        });
        renderer.setItemLabelFont(new Font("SansSerif", Font.PLAIN, 8));
        renderer.setItemLabelsVisible(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();
}

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