इसे जेएफरी चार्ट की उपस्थिति को दृश्यमान होने के बाद मैं कैसे अपडेट कर सकता हूं?

Question

के बाद चार्ट की उपस्थिति गतिशील रूप से अपडेट करने के लिए मैं JFreeChart का उपयोग कैसे कर सकता हूं इसे देखा गया है?

Answer 1

कक्षा ChartPanel इसके लिए सुविधाजनक है, क्योंकि इसमें चार्ट और समग्र स्थिति समेत चार्ट की समग्र उपस्थिति को नियंत्रित करने के तरीके हैं। इसके अतिरिक्त चार्ट के घटकों तक पहुंचना भी संभव है, जैसा कि नीचे दिखाया गया है।

import java.awt.BorderLayout; 
import java.awt.EventQueue; 
import java.awt.FlowLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.text.NumberFormat; 
import javax.swing.AbstractAction; 
import javax.swing.DefaultComboBoxModel; 
import javax.swing.JButton; 
import javax.swing.JComboBox; 
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.axis.DateAxis; 
import org.jfree.chart.axis.NumberAxis; 
import org.jfree.chart.plot.XYPlot; 
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; 
import org.jfree.data.time.TimeSeries; 
import org.jfree.data.time.TimeSeriesCollection; 
import org.jfree.data.time.Year; 
import org.jfree.data.xy.XYDataset; 

/** @see http://stackoverflow.com/questions/5522575 */ 
public class ChartPanelDemo { 

    private static final String title = "Return On Investment"; 
    private ChartPanel chartPanel = createChart(); 

    public ChartPanelDemo() { 
     JFrame f = new JFrame(title); 
     f.setTitle(title); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     f.setLayout(new BorderLayout(0, 5)); 
     f.add(chartPanel, BorderLayout.CENTER); 
     chartPanel.setMouseWheelEnabled(true); 
     chartPanel.setHorizontalAxisTrace(true); 
     chartPanel.setVerticalAxisTrace(true); 

     JPanel panel = new JPanel(new FlowLayout(FlowLayout.RIGHT)); 
     panel.add(createTrace()); 
     panel.add(createDate()); 
     panel.add(createZoom()); 
     f.add(panel, BorderLayout.SOUTH); 
     f.pack(); 
     f.setLocationRelativeTo(null); 
     f.setVisible(true); 
    } 

    private JComboBox createTrace() { 
     final JComboBox trace = new JComboBox(); 
     final String[] traceCmds = {"Enable Trace", "Disable Trace"}; 
     trace.setModel(new DefaultComboBoxModel(traceCmds)); 
     trace.addActionListener(new ActionListener() { 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       if (traceCmds[0].equals(trace.getSelectedItem())) { 
        chartPanel.setHorizontalAxisTrace(true); 
        chartPanel.setVerticalAxisTrace(true); 
        chartPanel.repaint(); 
       } else { 
        chartPanel.setHorizontalAxisTrace(false); 
        chartPanel.setVerticalAxisTrace(false); 
        chartPanel.repaint(); 
       } 
      } 
     }); 
     return trace; 
    } 

    private JComboBox createDate() { 
     final JComboBox date = new JComboBox(); 
     final String[] dateCmds = {"Horizontal Dates", "Vertical Dates"}; 
     date.setModel(new DefaultComboBoxModel(dateCmds)); 
     date.addActionListener(new ActionListener() { 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       JFreeChart chart = chartPanel.getChart(); 
       XYPlot plot = (XYPlot) chart.getPlot(); 
       DateAxis domain = (DateAxis) plot.getDomainAxis(); 
       if (dateCmds[0].equals(date.getSelectedItem())) { 
        domain.setVerticalTickLabels(false); 
       } else { 
        domain.setVerticalTickLabels(true); 
       } 
      } 
     }); 
     return date; 
    } 

    private JButton createZoom() { 
     final JButton auto = new JButton(new AbstractAction("Auto Zoom") { 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       chartPanel.restoreAutoBounds(); 
      } 
     }); 
     return auto; 
    } 

    private ChartPanel createChart() { 
     XYDataset roiData = createDataset(); 
     JFreeChart chart = ChartFactory.createTimeSeriesChart(
      title, "Date", "Value", roiData, true, true, false); 
     XYPlot plot = chart.getXYPlot(); 
     XYLineAndShapeRenderer renderer = 
      (XYLineAndShapeRenderer) plot.getRenderer(); 
     renderer.setBaseShapesVisible(true); 
     NumberFormat currency = NumberFormat.getCurrencyInstance(); 
     currency.setMaximumFractionDigits(0); 
     NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); 
     rangeAxis.setNumberFormatOverride(currency); 
     return new ChartPanel(chart); 
    } 

    private XYDataset createDataset() { 
     TimeSeriesCollection tsc = new TimeSeriesCollection(); 
     tsc.addSeries(createSeries("Projected", 200)); 
     tsc.addSeries(createSeries("Actual", 100)); 
     return tsc; 
    } 

    private TimeSeries createSeries(String name, double scale) { 
     TimeSeries series = new TimeSeries(name); 
     for (int i = 0; i < 6; i++) { 
      series.add(new Year(2005 + i), Math.pow(2, i) * scale); 
     } 
     return series; 
    } 

    public static void main(String[] args) { 
     EventQueue.invokeLater(new Runnable() { 

      @Override 
      public void run() { 
       ChartPanelDemo cpd = new ChartPanelDemo(); 
      } 
     }); 
    } 
}