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如何在单独的GUI上的面板中插入JFreeChart图表？

本文介绍了如何在单独的GUI上的面板中插入JFreeChart图表？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我想使用JFreeChart将图表放在GUI中的特定面板中。我有2个java文件（一个用于GUI，另一个用于创建图形），并且如果可能的话，希望保持这种方式。



在主GUI中我有一个名为panelGraph的面板：

  JPanel panelGraph = new JPanel（）; 
 panelGraph.setBounds（220,64,329,250）; 
 panelMain.add（panelGraph）; //它在主面板内
 panelGraph.setLayout（null）;

我还有一个触发图表外观的按钮：

  Button btnGetGraph = new JButton（Draw Graph）; 
 btnGetGraph.addActionListener（new ActionListener（）{
 public void actionPerformed（ActionEvent arg0）{
 
 XYLineChart_AWT.runGraph（Cenas，Titulo，XLABEL， YLABEL，panelGraph）; 
 
} 
}）; 
 btnGetGraph.setFont（new Font（Tahoma，Font.BOLD，13））; 
 btnGetGraph.setBounds（323,327,128,34）; 
 panelMain.add（btnGetGraph）;

如下所示，是创建图表的java文件：

 公共类XYLineChart_AWT扩展JFrame {
 public XYLineChart_AWT（String applicationTitle，String chartTitle，String xLabel，String yLabel，JPanel panel）{
 
 JFreeChart xylineChart = ChartFactory.createXYLineChart（
 chartTitle，
 xLabel，
 yLabel，
 createDataset（），
 PlotOrientation.VERTICAL，
 true，虚假，虚假）; 
 
 ChartPanel chartPanel = new ChartPanel（xylineChart）; 
 chartPanel.setPreferredSize（panel.getSize（））; 
 
 
 final XYPlot plot = xylineChart.getXYPlot（）; 
 plot.setBackgroundPaint（new Color（240,240,240））; 
 XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer（true，false）; 
 renderer.setSeriesPaint（0，Color.BLACK）; 
 renderer.setSeriesStroke（0，new BasicStroke（4.0f））; 
 plot.setRenderer（renderer）; 
 setContentPane（chartPanel）; 
 panel.add（chartPanel）; 
} 
 
 private XYDataset createDataset（）{
 
 final XYSeries seno = new XYSeries（Sin）; 
 for（double i = 0; i< = 1440; i ++）{
 double temp = Math.sin（i *（（2 * Math.PI）/ 640）+ Math.PI）+ 1 ; 
 seno.add（i / 60，temp）; 
} 
 
 
 final XYSeriesCollection dataset = new XYSeriesCollection（）; 
 dataset.addSeries（seno）; 
返回数据集; 
} 
 
 public static void runGraph（String appTitle，String chartTitle，String xLabel，String yLabel，JPanel panel）{
 XYLineChart_AWT chart = new XYLineChart_AWT（appTitle，chartTitle，xLabel， yLabel，panel）; 
 
 chart.pack（）; 
 chart.setVisible（true）; 
 panel.setVisible（true）; 
 
} 
}

这会创建图表并将其放入进入指定的面板（我通过方法runGraph（）发送）。
然而，它创建了第二个JFrame（我知道我创建了chart.setVisible（true），我可以把它设置为false），我不希望在我发送的面板之外创建它。



有没有办法实现这个不会创建额外的jFrame？



PS：另一个问题：setBackgroundPaint（ ）方法改变图形显示的背面。但是标题和图例的部分不会改变。我该如何更改这些部件？



感谢您的帮助，



Nhekas

解决方案

而不是使用 XYLineChartAWT 构造函数来实例化 ChartPanel ，make runGraph（）返回 JFreeChart 的工厂方法，用于主GUI的 ChartPanel 。使用图表面板方法 setChart（），它将自动更新您的面板。要更改图表面板的默认大小，请覆盖 getPreferredSize（），如 

  import java.awt.BasicStroke; 
 import java.awt.BorderLayout; 
 import java.awt.Color; 
 import java.awt.EventQueue; 
 import java.awt.event.ActionEvent; 
 import javax.swing.AbstractAction; 
 import javax.swing.JButton; 
 import javax.swing.JFrame; 
 import org.jfree.chart.ChartFactory; 
 import org.jfree.chart.ChartPanel; 
 import org.jfree.chart.JFreeChart; 
 import org.jfree.chart.plot.PlotOrientation; 
 import org.jfree.chart.plot.XYPlot; 
 import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; 
 import org.jfree.data.xy.XYDataset; 
 import org.jfree.data.xy.XYSeries; 
 import org.jfree.data.xy.XYSeriesCollection; 
 
 / ** 
 * @see https://stackoverflow.com/a/36757609/230513 
 * / 
公共类测试{
 
 private void display（）{
 JFrame f = new JFrame（Test）; 
 f.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）; 
 final ChartPanel chartPanel = new ChartPanel（null）; 
 f.add（chartPanel）; 
 f.add（new JButton（new AbstractAction（Draw Graph）{
 @Override 
 public void actionPerformed（ActionEvent e）{
 chartPanel.setChart（
） new XYLineChartAWT（）。runGraph（Title，X，Y））; 
} 
}），BorderLayout.SOUTH）; 
 f.pack（）; 
 f.setLocationRelativeTo（null）; 
 f.setVisible（true）; 
} 
 
 public static void main（String [] args）{
 EventQueue.invokeLater（new Test（）:: display）; 
} 
} 
 
公共类XYLineChartAWT {
 
 public JFreeChart runGraph（String chartTitle，String xLabel，String yLabel）{
 JFreeChart xylineChart = ChartFactory.createXYLineChart（
 chartTitle，
 xLabel，
 yLabel，
 createDataset（），
 PlotOrientation.VERTICAL，
 true，false，false）; 
 final XYPlot plot = xylineChart.getXYPlot（）; 
 plot.setBackgroundPaint（new Color（240,240,240））; 
 XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer（true，false）; 
 renderer.setSeriesPaint（0，Color.BLACK）; 
 renderer.setSeriesStroke（0，new BasicStroke（4.0f））; 
 plot.setRenderer（renderer）; 
返回xylineChart; 
} 
 
 private XYDataset createDataset（）{
 final XYSeries seno = new XYSeries（Sin）; 
 for（double i = 0; i< = 1440; i ++）{
 double temp = Math.sin（i *（（2 * Math.PI）/ 640）+ Math.PI）+ 1; 
 seno.add（i / 60，temp）; 
} 
 final XYSeriesCollection dataset = new XYSeriesCollection（）; 
 dataset.addSeries（seno）; 
返回数据集; 
} 
}


I want to put a chart inside a specific panel in a GUI using JFreeChart. I have 2 java files (one with the GUI, and another that creates the graph) and would like , if possible, to keep it this way.

In the main GUI I have a panel called panelGraph:

    JPanel panelGraph = new JPanel();
    panelGraph.setBounds(220, 64, 329, 250);
    panelMain.add(panelGraph); //it is inside the main panel
    panelGraph.setLayout(null);

And I also have a button that triggers the appearance of the graph:

    Button btnGetGraph = new JButton("Draw Graph");
    btnGetGraph.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {

            XYLineChart_AWT.runGraph("Cenas", "Titulo", "XLABEL", "YLABEL", panelGraph);

        }
    });
    btnGetGraph.setFont(new Font("Tahoma", Font.BOLD, 13));
    btnGetGraph.setBounds(323, 327, 128, 34);
    panelMain.add(btnGetGraph);

And as follows, is the java file that creates the graph:

  public class XYLineChart_AWT extends JFrame {
  public XYLineChart_AWT( String applicationTitle, String chartTitle, String xLabel, String yLabel, JPanel panel) {

  JFreeChart xylineChart = ChartFactory.createXYLineChart(
     chartTitle ,
     xLabel ,
     yLabel ,
     createDataset() ,
     PlotOrientation.VERTICAL ,
     true , false , false);

  ChartPanel chartPanel = new ChartPanel( xylineChart );
  chartPanel.setPreferredSize( panel.getSize() );


  final XYPlot plot = xylineChart.getXYPlot( );
  plot.setBackgroundPaint(new Color(240, 240, 240));
  XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(true,false);
  renderer.setSeriesPaint( 0 , Color.BLACK );
  renderer.setSeriesStroke( 0 , new BasicStroke( 4.0f ) );
  plot.setRenderer( renderer );
  setContentPane(chartPanel);
  panel.add(chartPanel);
  }

private XYDataset createDataset( ){

  final XYSeries seno = new XYSeries ("Sin");
  for(double i=0;i<=1440;i++){
      double temp=Math.sin(i*((2*Math.PI)/640) + Math.PI) + 1;
      seno.add(i/60, temp);
  }


  final XYSeriesCollection dataset = new XYSeriesCollection( );
  dataset.addSeries(seno);
  return dataset;
}

public static void runGraph(String appTitle, String chartTitle, String xLabel, String yLabel, JPanel panel) {
  XYLineChart_AWT chart = new XYLineChart_AWT(appTitle, chartTitle, xLabel, yLabel, panel);

  chart.pack();
  chart.setVisible(true);
  panel.setVisible(true);

 }
}

This creates the graph and puts it into the specified panel (that I send through the method runGraph()).However, it creates a 2nd JFrame ( I know i made chart.setVisible(true) and I can just put it to false) that I don't want to be created outside of the panel I send.

Is there any way to implement this that does not create that extra jFrame?

P.S.: Another question: the setBackgroundPaint() method changes the back of where the graph is shown. However the parts where the title and legend are don't change. How can I change those parts?

Thank you for your help,

Nhekas

解决方案

Instead of using the XYLineChartAWT constructor to instantiate a ChartPanel, make runGraph() a factory method that returns a JFreeChart for use in your main GUI's ChartPanel. Use the chart panel method setChart(), which will update your panel automatically. To change the chart panel's default size, override getPreferredSize() as shown here.

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

/**
 * @see https://stackoverflow.com/a/36757609/230513
 */
public class Test {

    private void display() {
        JFrame f = new JFrame("Test");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        final ChartPanel chartPanel = new ChartPanel(null);
        f.add(chartPanel);
        f.add(new JButton(new AbstractAction("Draw Graph") {
            @Override
            public void actionPerformed(ActionEvent e) {
                chartPanel.setChart(
                    new XYLineChartAWT().runGraph("Title", "X", "Y"));
            }
        }), BorderLayout.SOUTH);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Test()::display);
    }
}

public class XYLineChartAWT {

    public JFreeChart runGraph(String chartTitle, String xLabel, String yLabel) {
        JFreeChart xylineChart = ChartFactory.createXYLineChart(
            chartTitle,
            xLabel,
            yLabel,
            createDataset(),
            PlotOrientation.VERTICAL,
            true, false, false);
        final XYPlot plot = xylineChart.getXYPlot();
        plot.setBackgroundPaint(new Color(240, 240, 240));
        XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(true, false);
        renderer.setSeriesPaint(0, Color.BLACK);
        renderer.setSeriesStroke(0, new BasicStroke(4.0f));
        plot.setRenderer(renderer);
        return xylineChart;
    }

    private XYDataset createDataset() {
        final XYSeries seno = new XYSeries("Sin");
        for (double i = 0; i <= 1440; i++) {
            double temp = Math.sin(i * ((2 * Math.PI) / 640) + Math.PI) + 1;
            seno.add(i / 60, temp);
        }
        final XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(seno);
        return dataset;
    }
}

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09-05 11:26
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