JFreeChart AutoRange不能在同一地块上的多个系列上工作

Question

在此代码中，我创建了2个TimeSeries并将它们添加到同一个图中，但axis.setAutoRange(true)仅适用于第二个系列。

有没有办法使两个TimeSeries上的AutoRange工作？

import org.jfree.chart.ChartFactory; 
import org.jfree.chart.ChartPanel; 
import org.jfree.chart.JFreeChart; 
import org.jfree.chart.axis.ValueAxis; 
import org.jfree.chart.plot.XYPlot; 
import org.jfree.data.time.Millisecond; 
import org.jfree.data.time.TimeSeries; 
import org.jfree.data.time.TimeSeriesCollection; 
import org.jfree.ui.ApplicationFrame; 
import org.jfree.ui.RefineryUtilities; 

import javax.swing.*; 
import java.awt.*; 

public class Graph extends ApplicationFrame { 

    private TimeSeries seriesA; 
    private TimeSeries seriesB; 

    public Graph(final String windowTitle, int width, int height, String xTitle, String yTitle, String headerTitle, String graphTitle) { 
     super(windowTitle); 
     final TimeSeriesCollection dataset = new TimeSeriesCollection(); 
     this.seriesA = new TimeSeries(graphTitle); 
     this.seriesB = new TimeSeries(graphTitle); 
     dataset.addSeries(this.seriesA); 
     dataset.addSeries(this.seriesB); 

     final JFreeChart chart = ChartFactory.createTimeSeriesChart(
       headerTitle,//set title 
       xTitle,//set x title 
       yTitle,//set y title 
       dataset, 
       false, 
       false, 
       false 
     ); 

     final XYPlot plot = chart.getXYPlot(); 
     ValueAxis axis = plot.getDomainAxis(); 
     axis.setFixedAutoRange(60000.0); 

     axis = plot.getRangeAxis(); 
     axis.setAutoRange(true); 

     final ChartPanel chartPanel = new ChartPanel(chart); 
     final JPanel content = new JPanel(new BorderLayout()); 
     content.add(chartPanel); 

     chartPanel.setPreferredSize(new java.awt.Dimension(width, height)); 

     setContentPane(content); 
    } 

    public void addPointA(double y) { 
     this.seriesA.add(new Millisecond(), y); 
    } 

    public void addPointB(double y) { 
     this.seriesB.add(new Millisecond(), y); 
    } 


    public static void main(final String[] args) throws InterruptedException { 
     final Graph demo = new Graph("Demo",500,500,"Time","Value", 
       "Header1","graph1");//window title 
     demo.pack();//doesnt matter 
     RefineryUtilities.positionFrameOnScreen(demo,0.2,0.7);//manually choose window position % 
     demo.setVisible(true);//show window 

     double lastValue=80;//randomize input 
     while (true){ 
      demo.addPointA(lastValue); 
      demo.addPointB(lastValue-100); 
      //randomize input 
      lastValue*=Math.random()*0.2-0.1+1.001; 
      lastValue+=Math.random()*2-1; 

      //limit input rate 
      Thread.sleep(100); 
     } 
    } 
} 

在该图片中的axis.setAutoRange(true)作品只对红色图形（seriesB）

Answer 1

几个问题值得关注：

• 每个TimeSeries包括TimeSeriesCollection用作的名称Comparable索引;这些名称应该是唯一可靠的自动量程;使图表工厂的图例能够看到效果。

• 如分配中包含的org.jfree.chart.demo.TimeSeriesChartDemo1所示，自动量程通常不需要特殊设置。

• 仅在event dispatch thread上构建和操作Swing GUI对象。

• 请勿事件调度线程上的sleep();使用javax.swing.Timer来调整更新。

• 请勿不必要地扩展顶级容器。

• 不要无谓地嵌套容器。

import java.awt.EventQueue; 
import org.jfree.chart.ChartFactory; 
import org.jfree.chart.ChartPanel; 
import org.jfree.chart.JFreeChart; 
import org.jfree.data.time.Millisecond; 
import org.jfree.data.time.TimeSeries; 
import org.jfree.data.time.TimeSeriesCollection; 
import org.jfree.ui.ApplicationFrame; 
import org.jfree.ui.RefineryUtilities; 
import javax.swing.*; 
import java.awt.event.*; 

public class Graph extends ApplicationFrame { 

    private final TimeSeries seriesA = new TimeSeries("A"); 
    private final TimeSeries seriesB = new TimeSeries("B"); 

    public Graph(final String windowTitle, int width, int height, 
     String xTitle, String yTitle, String headerTitle, String graphTitle) { 
     super(windowTitle); 
     final TimeSeriesCollection dataset = new TimeSeriesCollection(); 
     dataset.addSeries(this.seriesA); 
     dataset.addSeries(this.seriesB); 
     final JFreeChart chart = ChartFactory.createTimeSeriesChart(
      headerTitle, xTitle, yTitle, dataset, true, true, false 
     ); 
     ChartPanel chartPanel = new ChartPanel(chart); 
     chartPanel.setPreferredSize(new java.awt.Dimension(width, height)); 
     add(chartPanel); 
    } 

    public void addPointA(double y) { 
     this.seriesA.add(new Millisecond(), y); 
    } 

    public void addPointB(double y) { 
     this.seriesB.add(new Millisecond(), y); 
    } 

    public static void main(final String[] args) { 
     EventQueue.invokeLater(() -> { 
      Graph demo = new Graph("Demo", 640, 480, 
       "Time", "Value", "Header", "Graph"); 
      demo.pack();//matters a great deal 
      RefineryUtilities.centerFrameOnScreen(demo); 
      demo.setVisible(true); 

      new Timer(100, (new ActionListener() { 
       double lastValue = 80; 

       @Override 
       public void actionPerformed(ActionEvent e) { 
        demo.addPointA(lastValue); 
        demo.addPointB(lastValue - 100); 
        lastValue *= Math.random() * 0.2 - 0.1 + 1.001; 
        lastValue += Math.random() * 2 - 1; 
       } 
      })).start(); 
     }); 
    } 
}