如何在覆蓋樣式中創建內部框架，而無需修改底層界面？

Question

/* JDialog是答案* /正如我看到有2種方式來添加額外的窗口，使用JDialog，但在那些你不能把容器。或者將JInternalFrames與特定容器（如JDesktopPane）一起使用，但爲此您必須將接口的其餘部分轉換爲內部框架。添加JInternalFrame-like窗口最簡單的方法是什麼？對底層佈局進行儘可能少的修改？

Answer 1

JDialog的contentParame就像JFrames一樣，可以放入JFrame的任何組件都可以放入一個JDialog中。例如：

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

public class DialogEg { 
    private static void createAndShowGUI() { 
     MainPanelGen mainPanelGen = new MainPanelGen(); 

     JFrame frame = new JFrame("DialogEg"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.getContentPane().add(mainPanelGen.getMainPanel()); 
     frame.pack(); 
     frame.setLocationRelativeTo(null); 
     frame.setVisible(true); 
    } 

    public static void main(String[] args) { 
     SwingUtilities.invokeLater(new Runnable() { 
     public void run() { 
      createAndShowGUI(); 
     } 
     }); 
    } 

} 

class MainPanelGen { 
    private JPanel mainPanel = new JPanel(); 
    private JTextField field = new JTextField(10); 
    private JButton btn = new JButton(new BtnActn()); 
    private JDialog dialog; 
    private DialogPanel dialogPanel = new DialogPanel(); 

    public MainPanelGen() { 
     mainPanel.add(field); 
     mainPanel.add(btn); 

     field.setEditable(false); 
     field.setFocusable(false); 
    } 

    public JPanel getMainPanel() { 
     return mainPanel; 
    } 

    private class BtnActn extends AbstractAction { 
     BtnActn() { 
     super("Button"); 
     } 

     @Override 
     public void actionPerformed(ActionEvent arg0) { 
     if (dialog == null) { 
      Window win = SwingUtilities.getWindowAncestor(mainPanel); 
      if (win != null) { 
       dialog = new JDialog(win, "My Dialog", 
        Dialog.ModalityType.APPLICATION_MODAL); 
       dialog.getContentPane().add(dialogPanel); 
       dialog.pack(); 
       dialog.setLocationRelativeTo(null); 
      } 
     } 
     dialog.setVisible(true); // here the modal dialog takes over 
     System.out.println (dialogPanel.getFieldText()); 
     field.setText(dialogPanel.getFieldText()); 
     } 
    } 
} 

class DialogPanel extends JPanel { 
    private JTextField field = new JTextField(10); 
    private JButton exitBtn = new JButton(new ExitBtnAxn("Exit")); 

    public DialogPanel() { 
     add(field); 
     add(exitBtn); 
    } 

    public String getFieldText() { 
     return field.getText(); 
    } 

    private class ExitBtnAxn extends AbstractAction { 

     public ExitBtnAxn(String name) { 
     super(name); 
     } 

     @Override 
     public void actionPerformed(ActionEvent arg0) { 
     Window win = SwingUtilities.getWindowAncestor(DialogPanel.this); 
     if (win != null) { 
      win.dispose(); 
     } 
     } 
    } 
}