Examples with XYItemRenderer org.jfree.chart.renderer.xy.XYItemRenderer used on opensource projects

Example 1 with XYItemRenderer

use of org.jfree.chart.renderer.xy.XYItemRenderer in project libresonic by Libresonic.

the class StatusChartController method handleRequest.

@RequestMapping(method = RequestMethod.GET)
public synchronized ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
    String type = request.getParameter("type");
    int index = Integer.parseInt(request.getParameter("index"));
    List<TransferStatus> statuses = Collections.emptyList();
    if ("stream".equals(type)) {
        statuses = statusService.getAllStreamStatuses();
    } else if ("download".equals(type)) {
        statuses = statusService.getAllDownloadStatuses();
    } else if ("upload".equals(type)) {
        statuses = statusService.getAllUploadStatuses();
    }
    if (index < 0 || index >= statuses.size()) {
        return null;
    }
    TransferStatus status = statuses.get(index);
    TimeSeries series = new TimeSeries("Kbps", Millisecond.class);
    TransferStatus.SampleHistory history = status.getHistory();
    long to = System.currentTimeMillis();
    long from = to - status.getHistoryLengthMillis();
    Range range = new DateRange(from, to);
    if (!history.isEmpty()) {
        TransferStatus.Sample previous = history.get(0);
        for (int i = 1; i < history.size(); i++) {
            TransferStatus.Sample sample = history.get(i);
            long elapsedTimeMilis = sample.getTimestamp() - previous.getTimestamp();
            long bytesStreamed = Math.max(0L, sample.getBytesTransfered() - previous.getBytesTransfered());
            double kbps = (8.0 * bytesStreamed / 1024.0) / (elapsedTimeMilis / 1000.0);
            series.addOrUpdate(new Millisecond(new Date(sample.getTimestamp())), kbps);
            previous = sample;
        }
    }
    // Compute moving average.
    series = MovingAverage.createMovingAverage(series, "Kbps", 20000, 5000);
    // Find min and max values.
    double min = 100;
    double max = 250;
    for (Object obj : series.getItems()) {
        TimeSeriesDataItem item = (TimeSeriesDataItem) obj;
        double value = item.getValue().doubleValue();
        if (item.getPeriod().getFirstMillisecond() > from) {
            min = Math.min(min, value);
            max = Math.max(max, value);
        }
    }
    // Add 10% to max value.
    max *= 1.1D;
    // Subtract 10% from min value.
    min *= 0.9D;
    TimeSeriesCollection dataset = new TimeSeriesCollection();
    dataset.addSeries(series);
    JFreeChart chart = ChartFactory.createTimeSeriesChart(null, null, null, dataset, false, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();
    plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);
    Paint background = new GradientPaint(0, 0, Color.lightGray, 0, IMAGE_HEIGHT, Color.white);
    plot.setBackgroundPaint(background);
    XYItemRenderer renderer = plot.getRendererForDataset(dataset);
    renderer.setSeriesPaint(0, Color.blue.darker());
    renderer.setSeriesStroke(0, new BasicStroke(2f));
    // Set theme-specific colors.
    Color bgColor = getBackground(request);
    Color fgColor = getForeground(request);
    chart.setBackgroundPaint(bgColor);
    ValueAxis domainAxis = plot.getDomainAxis();
    domainAxis.setRange(range);
    domainAxis.setTickLabelPaint(fgColor);
    domainAxis.setTickMarkPaint(fgColor);
    domainAxis.setAxisLinePaint(fgColor);
    ValueAxis rangeAxis = plot.getRangeAxis();
    rangeAxis.setRange(new Range(min, max));
    rangeAxis.setTickLabelPaint(fgColor);
    rangeAxis.setTickMarkPaint(fgColor);
    rangeAxis.setAxisLinePaint(fgColor);
    ChartUtilities.writeChartAsPNG(response.getOutputStream(), chart, IMAGE_WIDTH, IMAGE_HEIGHT);
    return null;
}

Example 2 with XYItemRenderer

use of org.jfree.chart.renderer.xy.XYItemRenderer in project processdash by dtuma.

the class AbstractEVXYChart method createXYLineAndShapeRenderer.

protected XYItemRenderer createXYLineAndShapeRenderer(boolean lines, boolean shapes) {
    XYItemRenderer renderer = new XYLineAndShapeRenderer(lines, shapes);
    renderer.setLegendItemLabelGenerator(new SeriesNameGenerator());
    renderer.setBaseToolTipGenerator(getTooltipGenerator());
    return renderer;
}