Example usage for org.jfree.data XYDataset getItemCount

Introduction

In this page you can find the example usage for org.jfree.data XYDataset getItemCount.

Prototype

public int getItemCount(int series);

Source Link

Document

Returns the number of items in a series.

Usage

From source file:ucar.unidata.idv.control.chart.MyTimeSeriesPlot.java

/**
 * draw/*from   w  w  w  . j  a  v  a 2s.  co  m*/
 *
 * @param g2 the graphics
 * @param dataArea where the data area is
 * @param index which data set
 * @param info info
 * @param crosshairState crosshairState
 *
 * @return any drawn
 */
public boolean render(Graphics2D g2, Rectangle2D dataArea, int index, PlotRenderingInfo info,
        CrosshairState crosshairState) {

    XYDataset dataset = getDataset(index);
    if (DatasetUtilities.isEmptyOrNull(dataset)) {
        return false;
    }

    ValueAxis rangeAxis = getRangeAxisForDataset(index);
    ValueAxis domainAxis = getDomainAxisForDataset(index);
    AxisLocation rangeAxisLocation = getRangeAxisLocation(index);
    AxisLocation domainAxisLocation = getDomainAxisLocation(index);
    RectangleEdge rangeEdge = getRangeAxisEdge();
    RectangleEdge domainEdge = getDomainAxisEdge();
    int seriesCount = dataset.getSeriesCount();
    //        System.out.println ("********************************");
    for (int series = seriesCount - 1; series >= 0; series--) {
        int itemCount = dataset.getItemCount(series);
        int[] xs = new int[itemCount];
        int[] ys = new int[itemCount];
        g2.setStroke(getRendererForDataset(dataset).getSeriesStroke(series));
        g2.setPaint(getRendererForDataset(dataset).getSeriesPaint(series));
        int pointCnt = 0;
        for (int item = 0; item < itemCount; item++) {
            double x1 = dataset.getXValue(series, item);
            double y1 = dataset.getYValue(series, item);
            if (!timeseries.valuesOk(index, x1, y1)) {
                if (pointCnt > 0) {
                    g2.drawPolyline(xs, ys, pointCnt);
                    pointCnt = 0;
                }
                continue;
            }
            double transX = domainAxis.valueToJava2D(x1, dataArea, domainEdge);
            double transY = rangeAxis.valueToJava2D(y1, dataArea, rangeEdge);
            if (!dataArea.contains(transX, transY)) {
                continue;
            }

            xs[pointCnt] = (int) (transX + 0.5);
            ys[pointCnt] = (int) (transY + 0.5);
            pointCnt++;
            if (pointCnt > 10) {
                g2.drawPolyline(xs, ys, pointCnt);
                xs[0] = xs[pointCnt - 1];
                ys[0] = ys[pointCnt - 1];
                pointCnt = 1;
            }

        }
        if (pointCnt > 1) {
            g2.drawPolyline(xs, ys, pointCnt);
        }
        long t2 = System.currentTimeMillis();
        //            System.err.println("time:" + (t2 - t1) + "ms #" + itemCount);
    }
    return true;
}

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