Example usage for org.jfree.chart.axis NumberAxis getLabel

Introduction

In this page you can find the example usage for org.jfree.chart.axis NumberAxis getLabel.

Prototype

public String getLabel() 

Source Link

Document

Returns the label for the axis.

Usage

From source file:org.ramadda.data.services.PointFormHandler.java

/**
 * _more_/*from www.j  a  va  2s .c  o  m*/
 *
 * @param request _more_
 * @param pointEntry _more_
 * @param plotInfo _more_
 *
 * @return _more_
 *
 * @throws Exception _more_
 */
public BufferedImage makeTimeseriesImage(Request request, PointEntry pointEntry, final PlotInfo plotInfo)
        throws Exception {

    Entry entry = pointEntry.getEntry();
    int width = TIMESERIES_WIDTH;
    int height = TIMESERIES_HEIGHT;
    long numRecords = pointEntry.getNumRecords();
    final int numPointsToPlot = request.get(ARG_NUMPOINTS, TIMESERIES_POINTS);
    final int[] cnt = { 0 };
    final List<TimeSeries> series = new ArrayList<TimeSeries>();

    final List<RecordField> tmpFields = pointEntry.getRecordFile().getChartableFields();

    final List<RecordField> fields = new ArrayList<RecordField>();

    if (request.get(ARG_CHART_SHOW + FIELD_ALTITUDE, false)) {
        fields.add(new RecordField(FIELD_ALTITUDE, LABEL_ALTITUDE, "", -1, UNIT_M));
    }

    for (RecordField attr : tmpFields) {
        if (request.get(ARG_CHART_SHOW + attr.getName(), false)) {
            fields.add(attr);
        }
    }

    if ((fields.size() == 0) && (tmpFields.size() > 0)) {
        fields.add(tmpFields.get(0));
        request.put(ARG_CHART_SHOW + tmpFields.get(0).getName(), "true");
    }

    for (RecordField attr : fields) {
        series.add(new TimeSeries(attr.getLabel()));
    }

    RecordVisitor visitor = new BridgeRecordVisitor(getOutputHandler()) {
        public boolean doVisitRecord(RecordFile file, VisitInfo visitInfo, Record record) {
            PointRecord pointRecord = (PointRecord) record;
            for (int fieldCnt = 0; fieldCnt < fields.size(); fieldCnt++) {
                RecordField field = fields.get(fieldCnt);
                double value;
                //Check for altitude
                if (field.getParamId() < 0) {
                    value = pointRecord.getAltitude();
                } else {
                    value = record.getValue(field.getParamId());
                }
                long time = record.getRecordTime();
                series.get(fieldCnt).add(new FixedMillisecond(time), value);
            }
            plotInfo.setIndex(pointRecord.index);
            cnt[0]++;

            return true;
        }
    };

    long t1 = System.currentTimeMillis();
    int skip = (int) (numRecords / numPointsToPlot);
    getRecordJobManager().visitSequential(request, pointEntry, visitor, new VisitInfo(skip));
    long t2 = System.currentTimeMillis();

    JFreeChart chart = createTimeseriesChart(request, entry, new TimeSeriesCollection(), null);
    long t3 = System.currentTimeMillis();
    XYPlot plot = (XYPlot) chart.getPlot();
    int lineCnt = 0;
    int[] colorCnt = { 0 };
    int numberOfAxisLegends = 0;

    Hashtable<String, double[]> valueRanges = new Hashtable<String, double[]>();

    for (int extraCnt = 0; extraCnt < series.size(); extraCnt++) {
        TimeSeries timeSeries = series.get(extraCnt);
        RecordField field = fields.get(extraCnt);
        String unit = field.getUnit();
        if ((unit != null) && (unit.length() == 0)) {
            unit = null;
        }

        if (unit == null) {
            unit = extraCnt + "";
        }
        if (unit == null) {
            continue;
        }
        double max = timeSeries.getMaxY();
        double min = timeSeries.getMinY();
        double[] range = valueRanges.get(unit);
        if (range == null) {
            range = new double[] { min, max };
            valueRanges.put(unit, range);
        } else {
            range[0] = Math.min(range[0], min);
            range[1] = Math.max(range[1], max);
        }
    }

    Hashtable<String, NumberAxis> seenAxis = new Hashtable<String, NumberAxis>();
    for (int extraCnt = 0; extraCnt < series.size(); extraCnt++) {
        TimeSeries timeSeries = series.get(extraCnt);
        RecordField field = fields.get(extraCnt);

        String unit = field.getUnit();
        if ((unit != null) && (unit.length() == 0)) {
            unit = null;
        }

        TimeSeriesCollection dataset2 = new TimeSeriesCollection();
        dataset2.addSeries(timeSeries);
        NumberAxis axis = new NumberAxis(field.getLabel());
        numberOfAxisLegends++;
        if (unit != null) {
            double[] range = valueRanges.get(unit);
            axis.setRange(range[0], range[1]);
            NumberAxis seenOne = seenAxis.get(unit);
            if (seenOne == null) {
                seenAxis.put(unit, axis);
            } else {
                seenOne.setLabel(seenOne.getLabel() + "/" + field.getLabel());
                axis.setVisible(false);
                numberOfAxisLegends--;
            }
        } else {
            axis.setAutoRange(true);
            axis.setAutoRangeIncludesZero(true);
        }

        plot.setRangeAxis(lineCnt, axis);
        plot.setDataset(lineCnt, dataset2);
        plot.mapDatasetToRangeAxis(lineCnt, lineCnt);
        plot.setRangeAxisLocation(lineCnt, AxisLocation.BOTTOM_OR_RIGHT);

        StandardXYItemRenderer renderer = new MyStandardXYItemRenderer(plotInfo);
        renderer.setSeriesPaint(0, getColor(request, ARG_CHART_COLOR + field.getName(), colorCnt));
        plot.setRenderer(lineCnt, renderer);
        lineCnt++;
    }

    AxisSpace axisSpace = new AxisSpace();
    axisSpace.setRight(TIMESERIES_AXIS_WIDTHPER * numberOfAxisLegends);
    plot.setFixedRangeAxisSpace(axisSpace);

    long t4 = System.currentTimeMillis();
    BufferedImage newImage = chart.createBufferedImage(width + (numberOfAxisLegends * TIMESERIES_AXIS_WIDTHPER),
            height);

    long t5 = System.currentTimeMillis();

    //        System.err.println("Time series  cnt:" + cnt[0] + " " + (t2 - t1) + " "  + (t3 - t2) + " " + (t4 - t3) + " " + (t5 - t4));
    return newImage;
}

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