Java&JFreeChart-如何使用其容器(例如JPanel)设置JFreeChart的ChartPanel调整大小?

问题描述

我刚刚发现，当我将ChartPanel添加到JFrame时，随着JFrame拖动的变大或变小，ChartPanel将调整大小以适合该框架.但是，当我将ChartPanel添加到JPanel时，随着JFrame调整大小，JPanel的大小(width和height)会更改以适合JFrame.但是，ChartPanel仅保留其尺寸，从而使扩大后的JPanel留有很多空白空间.如何使用GUI中的容器调整ChartPanel的大小?

I just found that when i add a ChartPanel to a JFrame, the ChartPanel will resize to fit the frame as the JFrame dragged larger or smaller. However, when i add the ChartPanel to a JPanel, the JPanel's size( width and height ) changes to fit the JFrame as the JFrame resized. But the ChartPanel just keeps it's dimensions, leaving the enlarged JPanel a lot of empty space. How to make ChartPanel resize with it's container in GUI?

这是我的示例代码:

1. 这种情况下，图表使用JFrame调整大小

ChartPanel chartPanel = new ChartPanel(createWhateverChart());
JFrame frame = new JFrame();
frame.add(chartPanel);

1. 在这种情况下，我首先将ChartPanel添加到JPanel，以便于管理和更新图表，但ChartPanel不会使用JPanel/JFrame调整大小.

ChartPanel chartPanel = new ChartPanel(createWhateverChart());
JPanel panel = new JPanel("Who cares");
panel.add(chartPanel, BorderLayout.CENTER);
JFrame frame = new JFrame();
frame.add(panel);

推荐答案

尝试我的代码，它可以正常工作.

Try my code and it works fine.

请注意:

我有一帧包含一个panelMain，panelMain包含一个subPanel，一个subPanel包含ChartPanel.

I have one frame which contains a panelMain, A panelMain contains a subPanel and a subPanel contains ChartPanel.

frame.setLayout(new BoxLayout(frame.getContentPane(), BoxLayout.Y_AXIS));                      
JPanel panelMain = new JPanel(new GridLayout(0,2));            
ChartPanel chartPanel = createChart();        
JPanel subPanel = new JPanel(new BorderLayout());   
subPanel.setBorder(BorderFactory.createTitledBorder("Consommation"));
subPanel.setPreferredSize(new Dimension(400, 200));    
subPanel.add(chartPanel);   


panelMain.add(subPanel);        
frame.add(panelMain);        
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);

现在，当您调整窗口应用程序的大小时.您的chartPanel会自动调整大小.希望这会有所帮助.

And now when you resize your window application. Your chartPanel will resized automatically. Hope this helps.

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