Question

我使用java绘制图表，我想在xyplot中为小区域设置背景颜色。喜欢：我想要从x轴（20到30）和y轴（10-20）的区域设置红色，并为剩下的做这样的，我使用价值制造者，但不给我很好的解决方案，因为它填充长标记的颜色和我只想要小面积

这是我的代码：

private JFreeChart createChart(XYDataset dataset) {

    /*JFreeChart chart = ChartFactory.createXYLineChart(
            "Chart Index Sag",
            "Sag Duration",
            "Retained Voltage",
            dataset,
            PlotOrientation.VERTICAL,
            false,
            false,
            false
    );*/

    XYLineAndShapeRenderer rr = new XYLineAndShapeRenderer();
    rr.setSeriesLinesVisible(2, true);
    rr.setSeriesShapesVisible(2, true);
    rr.setPaint(Color.red);

    // Point label
    XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
    renderer.setBaseFillPaint(Color.black);
    renderer.setSeriesLinesVisible(0, false);
    renderer.setBaseItemLabelGenerator(new LabelGenerator());
    renderer.setBaseItemLabelsVisible(true);
    renderer.setBaseItemLabelFont(new Font("Arial", Font.BOLD, 12));
    renderer.setPaint(Color.black);
    //plot = (XYPlot) chart.getPlot();
    SymbolAxis symbolaxis1 = new SymbolAxis("Sag Duration", new String[] { "0","0.02","0.2", "0.5", "10" });
    symbolaxis1.setRange(0,6);
    symbolaxis1.setGridBandsVisible(false);

    SymbolAxis range = new SymbolAxis("Returned Voltage", new String[] { "0","0.2","0.4", "0.6", "0.8", "1" });
    range.setRange(0,5);
    range.setGridBandsVisible(false);

    plot = new XYPlot(dataset, symbolaxis1, range, renderer);
    plot.setDomainPannable(true);
    plot.setRangePannable(true);
    plot.setBackgroundPaint(Color.lightGray);
    // Line curve
    plot.setDataset(0, dataset);
    plot.setDataset(1, dataset1);

    final Marker originalEnd = new ValueMarker(1);
    originalEnd.setPaint(Color.black);
    originalEnd.setStroke(new BasicStroke(1));
    plot.addDomainMarker(originalEnd);

    final Marker v2 = new ValueMarker(2);
    v2.setPaint(Color.black);
    v2.setStroke(new BasicStroke(1));
    plot.addDomainMarker(v2);

    final Marker v3 = new ValueMarker(3);
    v3.setPaint(Color.black);
    v3.setStroke(new BasicStroke(1));
    plot.addDomainMarker(v3);

    final Marker v4 = new ValueMarker(4);
    v4.setPaint(Color.black);
    v4.setStroke(new BasicStroke(1));
    plot.addDomainMarker(v4);

    Marker r1 = new ValueMarker(1);
    r1.setPaint(Color.black);
    r1.setStroke(new BasicStroke(1));
    plot.addRangeMarker(r1);

    Marker r2 = new ValueMarker(2);
    r2.setPaint(Color.black);
    r2.setStroke(new BasicStroke(1));
    plot.addRangeMarker(r2);

    Marker r3 = new ValueMarker(3);
    r3.setPaint(Color.black);
    r3.setStroke(new BasicStroke(1));
    plot.addRangeMarker(r3);

    Marker r4 = new ValueMarker(4);
    r4.setPaint(Color.black);
    r4.setStroke(new BasicStroke(1));
    plot.addRangeMarker(r4);

    float dash[] = {1, 1};
    float f1 = 1, f2 = 1, f3 = 10;


    /*NumberAxis domainAxis = (NumberAxis) plot.getDomainAxis();
    domainAxis.setRange(0, 2);
    domainAxis.setTickUnit(new NumberTickUnit(0.2));*/
    BasicStroke gridstroke = new BasicStroke(f1, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, f2, dash, f3);
    plot.setDomainGridlinePaint(Color.blue);
    //plot.setRangeGridlinePaint(Color.blue);
    plot.setDomainGridlineStroke(gridstroke);
    plot.setRangeGridlineStroke(gridstroke);
    final JFreeChart chart = new JFreeChart(plot);
    chart.getXYPlot().setRenderer(0, rr);
    chart.getXYPlot().setRenderer(1, renderer);
    return chart;
}

Answer 1

你应该试试XYBoxAnnotation，也许是这样的：

XYPlot plot = chart.getXYPlot();
XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer();
XYBoxAnnotation xyboxannotation = new XYBoxAnnotation(
    1, 1, 2, 2, new BasicStroke(0), new Color(0), new Color(0x30d0d0d0));
renderer.addAnnotation(xyboxannotation, Layer.BACKGROUND);

jfreechart xyplot设置小区域的背景颜色

1 个答案: