我在XYPlot
上绘制了4个系列。我想在点击XYPlot
时获取系列ID(请参阅//int seriesId = ???;
)。有可能吗?
_chartPanel.addChartMouseListener(new ChartMouseListener() {
@Override
public void chartMouseClicked(ChartMouseEvent cme)
{
MouseEvent me = cme.getTrigger();
XYPlot plot = (XYPlot) cme.getChart().getPlot();
if (me.getClickCount() == 2)
{
plot.clearAnnotations();
}
else
{
Rectangle2D dataArea = _chartPanel.getScreenDataArea();
plot.clearAnnotations();
ValueAxis xAxis = plot.getDomainAxis();
ValueAxis yAxis = plot.getRangeAxis();
double x = xAxis.java2DToValue(cme.getTrigger().getX(), dataArea, RectangleEdge.BOTTOM);
double y = yAxis.java2DToValue(cme.getTrigger().getY(), dataArea, RectangleEdge.LEFT);
if (!xAxis.getRange().contains(x)) {
x = Double.NaN;
//int seriesId = ???;
DecimalFormat df = new DecimalFormat("#.##");
df.setRoundingMode(RoundingMode.CEILING);
XYPointerAnnotation pt = new XYPointerAnnotation("Lat: " + df.format(y) + "\n Lon: " + df.format(x), x, y, 0.2);
pt.setBackgroundPaint(new Color(103,154,236));
// pt.setArrowPaintnew Color(103,154,236)d);
pt.setFont(_font);
pt.setPaint(Color.LIGHT_GRAY);
plot.addAnnotation(pt);
}
}
答案 0 :(得分:2)
如图here所示,您可以从ChartMouseEvent
检索ChartEntity
。对于ChartEntity
类型getDataset()
,您可以通过getSeriesIndex()
获取数据集,通过ChartEntity ce = cme.getEntity();
if (ce instanceof XYItemEntity) {
XYItemEntity e = (XYItemEntity) ce;
System.out.println("Dataset: " + e.getDataset());
System.out.println("Series index: " + e.getSeriesIndex());
}
获取系列索引。
highchart