jFreechart点消失点击

我有一个Java 6/Swing应用程序（是的，我知道，但多数民众赞成的要求），我需要显示一些极地情节。一切都很顺利，但是当我点击这个情节时，即使我将窗户移动到附近，情节也会消失。我与NetBeans工作，这里是导致同样的问题jFreechart点消失点击

使用的库的虚拟码是

了JFreeChart 1.0.19.jar
jcommon-1.0.23.jar

NewJFrame.java

import org.jfree.data.xy.XYSeries; 
import org.jfree.data.xy.XYSeriesCollection; 


public class NewJFrame extends javax.swing.JFrame { 


    private PlotHandler plotHandler; 

    public NewJFrame() { 
     initComponents(); 
     plotHandler = new PlotHandler(jPanel1, "blub", 1); 
    } 


    @SuppressWarnings("unchecked") 
    // <editor-fold defaultstate="collapsed" desc="Generated Code">       
    private void initComponents() { 

     jPanel1 = new javax.swing.JPanel(); 
     jButton1 = new javax.swing.JButton(); 

     setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

     javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); 
     jPanel1.setLayout(jPanel1Layout); 
     jPanel1Layout.setHorizontalGroup(
      jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGap(0, 504, Short.MAX_VALUE) 
     ); 
     jPanel1Layout.setVerticalGroup(
      jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGap(0, 409, Short.MAX_VALUE) 
     ); 

     jButton1.setText("jButton1"); 
     jButton1.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       jButton1ActionPerformed(evt); 
      } 
     }); 

     javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
     getContentPane().setLayout(layout); 
     layout.setHorizontalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addContainerGap() 
       .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addContainerGap(36, Short.MAX_VALUE)) 
      .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() 
       .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
       .addComponent(jButton1) 
       .addGap(217, 217, 217)) 
     ); 
     layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
       .addComponent(jButton1) 
       .addContainerGap()) 
     ); 

     pack(); 
    }// </editor-fold>       

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {           
     XYSeriesCollection data; 
     XYSeries series;//("Bearing"+getBearingIndex(i)); 
     data = new XYSeriesCollection(); 
     series = new XYSeries("Bearings"); 
     series.add(Math.random()*180/Math.PI, 
      Math.random()); 
     data.addSeries(series); 
     plotHandler.plotData(data); 
    }           

    /** 
    * @param args the command line arguments 
    */ 
    public static void main(String args[]) { 
     try { 
      for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { 
       if ("Nimbus".equals(info.getName())) { 
        javax.swing.UIManager.setLookAndFeel(info.getClassName()); 
        break; 
       } 
      } 
     } catch (ClassNotFoundException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (InstantiationException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (IllegalAccessException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
      java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } 
     //</editor-fold> 

     /* Create and display the form */ 
     java.awt.EventQueue.invokeLater(new Runnable() { 
      public void run() { 
       new NewJFrame().setVisible(true); 
      } 
     }); 
    } 

    // Variables declaration - do not modify      
    private javax.swing.JButton jButton1; 
    private javax.swing.JPanel jPanel1; 
    // End of variables declaration     
}

PlotHandler.java

import java.awt.BorderLayout; 
import javax.swing.JPanel; 
import org.jfree.data.xy.XYSeriesCollection; 

public class PlotHandler { 
    private final JPanel jPanel; 
    private final String plane; 
    private double range; 


    public PlotHandler(JPanel jPanel, String plane, double range) { 
     this.jPanel = jPanel; 
     this.plane = plane; 
     this.range = range; 

     // initialize plot 
     this.jPanel.setLayout(new java.awt.BorderLayout()); 
     this.jPanel.add(PolarPlotHandler.emptyPolarChart(range), BorderLayout.CENTER); 
     this.jPanel.validate(); 
    } 

    public void plotData(XYSeriesCollection data) { 
     jPanel.setLayout(new java.awt.BorderLayout()); 

     jPanel.add(PolarPlotHandler.createPolarChart(data, range), BorderLayout.CENTER); 
     jPanel.validate();   
    } 
}

PolarPlotHandler.java

import java.awt.Color; 
import org.jfree.chart.ChartFactory; 
import org.jfree.chart.ChartPanel; 
import org.jfree.chart.JFreeChart; 
import org.jfree.chart.PolarChartPanel; 
import org.jfree.chart.axis.NumberAxis; 
import org.jfree.chart.axis.NumberTickUnit; 
import org.jfree.chart.plot.PolarPlot; 
import org.jfree.chart.renderer.DefaultPolarItemRenderer; 
import org.jfree.data.xy.XYDataset; 
import org.jfree.data.xy.XYSeriesCollection; 

public final class PolarPlotHandler { 

    private PolarPlotHandler() { } 

    public static ChartPanel createPolarChart(XYSeriesCollection data, double range) { 
     final XYDataset dataset = data; 
     range = 200; 
     range = Math.ceil(range/10)*10; 
     range = Math.max(1, range); 
     final JFreeChart chart = createChart(dataset, range/1000000); 
     if(data.getSeriesCount()<=1 && data.getSeries(0).getItemCount()>0) 
      chart.removeLegend(); 
     else { 

     } 
     ChartPanel chartPanel = new PolarChartPanel(chart); 
     chartPanel.setDomainZoomable(false); 
     chartPanel.setRangeZoomable(false); 

     return chartPanel; 
    } 
    private static JFreeChart createChart(final XYDataset dataset, double range) { 
     final JFreeChart chart = ChartFactory.createPolarChart(
       "", dataset, true, true, false 
     ); 
     final PolarPlot plot = (PolarPlot) chart.getPlot(); 
     // get Axis 
     plot.setAngleOffset(0); 
     plot.setCounterClockwise(true); 
     plot.getAxis().setTickLabelsVisible(false); 
     plot.setAngleTickUnit(new NumberTickUnit(45)); 
     ((NumberAxis)plot.getAxis()).setTickUnit(new NumberTickUnit(range)); 
     // find the maximum range 
     plot.getAxis().setRange(0, 2.0); 
     plot.getAxis().setVisible(true); 
     plot.setBackgroundAlpha(0.0f); 
     plot.setAngleGridlinePaint(Color.black); 
     plot.setRadiusGridlinePaint(Color.black); 
     final DefaultPolarItemRenderer renderer = (DefaultPolarItemRenderer) plot.getRenderer(); 
     renderer.setSeriesFilled(2, false); 
     return chart; 
    } 
public static ChartPanel emptyPolarChart() { 
    return emptyPolarChart(200.0); 
} 

public static ChartPanel emptyPolarChart(double range) { 
    final JFreeChart chart = createChart(new XYSeriesCollection(), range/1000000); 
    chart.removeLegend(); 
    ChartPanel chartPanel = new PolarChartPanel(chart); 
    return chartPanel; 
} 
}

来源

2016-04-25 rst

它看起来像你试图通过更换整个内附ChartPanel更新PolarPlot。相反，更新数据集的系列，并且监听图表面板将自动更新以作为响应。在下面的示例中，按钮的处理程序会清除数据集的XYSeries，并在每次单击该按钮时添加一个新的随机点。

@Override 
public void actionPerformed(ActionEvent e) { 
    series.clear(); 
    series.add(r.nextDouble() * 360, r.nextDouble()); 
}

import java.awt.BorderLayout; 
import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.EventQueue; 
import java.awt.FlowLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.util.Random; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import org.jfree.chart.ChartFactory; 
import org.jfree.chart.ChartPanel; 
import org.jfree.chart.JFreeChart; 
import org.jfree.chart.plot.PolarPlot; 
import org.jfree.data.xy.XYDataset; 
import org.jfree.data.xy.XYSeries; 
import org.jfree.data.xy.XYSeriesCollection; 

/** @see http://stackoverflow.com/a/36846122/230513 */ 
public class Test { 

    private final XYSeries series = new XYSeries("Series"); 
    private final XYDataset dataset = new XYSeriesCollection(series); 

    public Test() { 
     JFrame f = new JFrame(); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     JFreeChart chart = ChartFactory.createPolarChart(
      "Title", dataset, true, true, false); 
     final PolarPlot plot = (PolarPlot) chart.getPlot(); 
     plot.setBackgroundPaint(Color.white); 
     plot.getAxis().setRange(0, 1); 
     plot.getAxis().setTickLabelsVisible(false); 
     plot.setAngleGridlinePaint(Color.black); 
     plot.setRadiusGridlinePaint(Color.black); 
     plot.setRadiusMinorGridlinesVisible(false); 
     ChartPanel chartPanel = new ChartPanel(chart) { 
      @Override 
      public Dimension getPreferredSize() { 
       return new Dimension(640, 480); 
      } 
     }; 

     JButton button = new JButton("Button"); 
     button.addActionListener(new ActionListener() { 
      Random r = new Random(); 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       series.clear(); 
       series.add(r.nextDouble() * 360, r.nextDouble()); 
      } 
     }); 
     JPanel control = new JPanel(new FlowLayout(FlowLayout.RIGHT)); 
     control.add(button); 

     f.add(chartPanel, BorderLayout.CENTER); 
     f.add(control, BorderLayout.SOUTH); 
     f.pack(); 
     f.setLocationRelativeTo(null); 
     f.setVisible(true); 
    } 

    public static void main(String args[]) { 
     EventQueue.invokeLater(new Runnable() { 
      public void run() { 
       Test t = new Test(); 
      } 
     }); 
    } 
}

来源

2016-04-25 16:30:12 trashgod

非常感谢你，这工作也是如此。我刚刚发现了另一个解决方案：添加'jPanel.removeAll（）'。问题是，我总是在不删除现有图表的情况下向面板添加新图表。不过，我认为更新数据集更加优雅。 – rst

我认为这是更具扩展性;用户'ChartPanel :: setChart（）'，如果需要[示例]（http://stackoverflow.com/search?q=user%3A230513+setchart）。 – trashgod

jFreechart点消失点击

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