package CH04.源程序;

/*
**源代碼框架
*/
import java.awt.*; 
import javax.swing.*;
import java.awt.event.*; 
import javax.swing.event.*;
import javax.swing.border.*;
import javax.swing.filechooser.FileFilter; 
import javax.swing.filechooser.FileView; 
import java.io.*; 
import java.util.*; 

class ViewSourceFrame extends JFrame implements ActionListener{ 
    JPanel contentPane; 
    JPanel panel1 = new JPanel (); 
    JPanel panel2 = new JPanel (); 
    Border border1; 

    JButton closebutton = new JButton ();
    JButton savebutton = new JButton ();
    JScrollPane jScrollPanel = new JScrollPane (); 
    JTextArea jTextArea1 = new JTextArea (); 

    String htmlSource; 

    /**
	**構造函數，初始化圖形用戶界面
	*/
	public ViewSourceFrame (String htmlSource) {
        
        this.htmlSource = htmlSource; 
        enableEvents (AWTEvent.WINDOW_EVENT_MASK); 
        setSize (new Dimension (600,500)); 
        setTitle ("源代碼"); 
        setDefaultCloseOperation (WindowConstants.DISPOSE_ON_CLOSE); 
        
        contentPane = (JPanel)getContentPane (); 
        contentPane.setLayout (new BorderLayout()); 
        
        panel2.setLayout (new FlowLayout()); 
        
        savebutton.setText ("保存"); 
        closebutton.setText ("退出");
        
		closebutton.addActionListener(this);
        savebutton.addActionListener(this);
        
        jScrollPanel.getViewport ().add (jTextArea1,null); 
        border1 = BorderFactory.createEmptyBorder (4,4,4,4); 
        panel1.setLayout (new BorderLayout()); 
        panel1.setBorder (border1); 
        panel1.add (jScrollPanel,BorderLayout.CENTER); 
        contentPane.add (panel1,BorderLayout.CENTER); 
        
        panel2.add (savebutton); 
        panel2.add (closebutton); 
        
		contentPane.add (panel2,BorderLayout.SOUTH); 
        this.jTextArea1.setEditable (true); 
        this.jTextArea1.setText (this.htmlSource); 
        //設置光標的位置，將其移動到文本區(qū)第0個字符
		this.jTextArea1.setCaretPosition (0); 
    } 
    
    /**
	**實現監(jiān)聽器接口的actionPerformed函數
	*/
	public void actionPerformed(ActionEvent e) {
        String url = "";
        if (e.getSource() == closebutton){
            dispose();
        }
        else if(e.getSource() == savebutton){
            JFileChooser fc=new JFileChooser();
            int returnVal=fc.showSaveDialog(ViewSourceFrame.this);
            File saveFile=fc.getSelectedFile();
            try {
                FileWriter writeOut = new FileWriter(saveFile);
                writeOut.write(jTextArea1.getText());
                writeOut.close();
            }
            catch (IOException ex) {
                System.out.println("保存失敗");
            }
        }
    }
}