java - CombinedDomainXYPlot 不重新缩放域轴

Question

当我从使用 CombinedDomainXYPlot 的图表中隐藏系列数时，所有范围轴都会很好地自动重新缩放。但是，域轴不会重新缩放。有什么方法可以手动刷新缩放比例，或者我可能缺少一个设置来启用此设置中域轴的自动缩放？

Answer 1

CombinedDomainXYPlot 在 getDataRange() 中为其共享域轴建立组合最大Range。这是允许共享轴所必需的。更改系列的可见性对共享域轴没有影响；更改 Dataset 通过其 configure() 方法更新共享域轴。在任何一种情况下，子图的范围轴都可以独立更新。

下面的示例允许您独立更新子图或更改系列的可见性。在 configure() 上中断以查看效果。您对切换 setAutoRange () 的建议可以替换为对 configure() 的一次调用；但效果应该为零，因为数据及其组合的最大 Range 没有变化。

mainPlot.getDomainAxis().configure();

要自动更新共享域轴，请使用 addSeries() 或 removeSeries() 而不是 setSeriesVisible()。

顺便说一句，不要忽视Initial Threads和 pack()。

import java.awt.*;
import java.awt.event.ActionEvent;
import java.util.Random;
import javax.swing.*;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CombinedDomainXYPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import static org.jfree.chart.renderer.xy.StandardXYItemRenderer.*;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

/**
 * @see https://stackoverflow.com/a/64508866/230513
 * @see https://stackoverflow.com/q/11870416/230513
 */
public class CombinedPlot {

    private static final int MAX = 3;
    private static final Random RND = new Random();

    public static void main(String[] args) {
        EventQueue.invokeLater(CombinedPlot::init);
    }

    private static void init() {
        XYItemRenderer renderer = new StandardXYItemRenderer(SHAPES_AND_LINES);
        XYPlot plot1 = new XYPlot(
            generateData(), null, new NumberAxis("Range 1"), renderer);
        XYPlot plot2 = new XYPlot(
            generateData(), null, new NumberAxis("Range 2"), renderer);
        final CombinedDomainXYPlot plot =
            new CombinedDomainXYPlot(new NumberAxis("Domain"));
        plot.setDomainPannable(true);
        plot.setRangePannable(true);
        plot.add(plot1);
        plot.add(plot2);
        plot.setOrientation(PlotOrientation.VERTICAL);
        JFreeChart chart = new JFreeChart(
            "Combined Plots", JFreeChart.DEFAULT_TITLE_FONT, plot, true);
        ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new Dimension(800, 500));

        JPanel controlPanel = new JPanel();
        controlPanel.add(new JButton(new UpdateAction(plot, 0)));
        controlPanel.add(new JButton(new UpdateAction(plot, 1)));
        for (int i = 0; i < MAX; i++) {
            JCheckBox jcb = new JCheckBox(new VisibleAction(renderer, i));
            jcb.setSelected(true);
            renderer.setSeriesVisible(i, true);
            controlPanel.add(jcb);
        }

        JFrame frame = new JFrame("Combined Plot Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(chartPanel, BorderLayout.CENTER);
        frame.add(controlPanel, BorderLayout.SOUTH);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    private static class UpdateAction extends AbstractAction {

        private final XYPlot plot;

        public UpdateAction(CombinedDomainXYPlot plot, int i) {
            super("Update plot " + (i + 1));
            this.plot = (XYPlot) plot.getSubplots().get(i);
        }

        @Override
        public void actionPerformed(ActionEvent e) {
            plot.setDataset(CombinedPlot.generateData());
        }
    }

    private static class VisibleAction extends AbstractAction {

        private XYItemRenderer renderer;
        private int i;

        public VisibleAction(XYItemRenderer renderer, int i) {
            super("Series " + (i + 1));
            this.renderer = renderer;
            this.i = i;
        }

        @Override
        public void actionPerformed(ActionEvent e) {
            renderer.setSeriesVisible(i, !renderer.getSeriesVisible(i));
        }
    }

    private static XYSeriesCollection generateData() {
        XYSeriesCollection data = new XYSeriesCollection();
        for (int i = 0; i < MAX; i++) {
            data.addSeries(generateSeries("Series " + (i + 1)));
        }
        return data;
    }

    private static XYSeries generateSeries(String key) {
        XYSeries series = new XYSeries(key);
        for (int i = 0; i < 16; i++) {
            series.add(RND.nextGaussian(), RND.nextGaussian());
        }
        return series;
    }
}