notepad_newfile.java

java 编写的代码

/**
 * 窗内子窗体
 * 每次新建都 new 一个新的对象
 */
package com.edu.sccp.snail.notepad.view;
import java.awt.BorderLayout;
import java.awt.Container;
import java.beans.PropertyVetoException;
import java.io.*;

import javax.swing.JFileChooser;
import javax.swing.JInternalFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.event.InternalFrameEvent;
import javax.swing.event.InternalFrameListener;
import javax.swing.event.UndoableEditEvent;
import javax.swing.event.UndoableEditListener;
import javax.swing.undo.UndoManager;
public class Notepad_newFile extends JInternalFrame implements InternalFrameListener ,UndoableEditListener{
   private static final long serialVersionUID = 3711879703284613261L;
   JTextArea jta = null;
   UndoManager undo = new UndoManager();
   Notepad_Font_Frame font = new Notepad_Font_Frame(); //字体设置
   Notepad_Color_Frame color = new  Notepad_Color_Frame(); //颜色设置窗体
   String title = null;  //设置名称
   File file = null;
   FileOutputStream fos = null;
   /**
    *默认的构造函数
    */   
   public Notepad_newFile(){
	  
   }
   public Notepad_newFile(String title){
	   super(title,true,true,true,true);
	   this.setSize(300,200);
	   init();   //初始化	 	  
	   this.addInternalFrameListener(this);	   
	   this.show();	   
   }
   /**
    * @param
    * @return a init InterWindows
    */
   public void init(){
	   this.setSize(400,300);
	   jta = new Notepad_TextArea();  //自己定义的一个JTextArea	
	   Container c = getContentPane();
	   c.setLayout(new BorderLayout());
       JScrollPane jsp = new JScrollPane(jta);
       jta.getDocument().addUndoableEditListener(this);
	   c.add(jsp,BorderLayout.CENTER);
   }     
public void internalFrameActivated(InternalFrameEvent arg0) {
	
}
public void internalFrameClosed(InternalFrameEvent arg0) {	
	try {
		this.setClosed(true);
	} catch (PropertyVetoException e) {		
		e.printStackTrace();
	}	
}
public void internalFrameClosing(InternalFrameEvent arg0) {	
	int optionType = JOptionPane.showConfirmDialog(this,this.getTitle()+"文件是否保存","关闭文件",JOptionPane.YES_NO_CANCEL_OPTION);
    if(optionType == JOptionPane.YES_OPTION)
    {
    	Notepad_JFileChooser notepad_filechooser = new Notepad_JFileChooser(
				file);
		int returnVal = notepad_filechooser.showSaveDialog(this);
		if (returnVal == JFileChooser.APPROVE_OPTION) {
			file = notepad_filechooser.getSelectedFile();	
///////////////////////////////////////////////////////////////////////////////////	
			String str = null;
			byte buf[] = new byte[1024];   
			if(file !=null){
	        		 try {
							file.createNewFile();
						} catch (IOException e1) {
							e1.printStackTrace();
						}if(file.canWrite()){
	        				   try {
	              					fos = new FileOutputStream(file); 					
	              					str = jta.getText();
	              					buf= str.getBytes();
	              					fos.write(buf,0,str.length());             					
	              				} catch (FileNotFoundException e) {					
	              					e.printStackTrace();
	              				} catch (IOException e) {							
									e.printStackTrace();
								}finally{
									try{
										fos.close();
									}catch(IOException e){
										e.printStackTrace();
									}
								}
	        			   }      			   
	        		   }}else {
			JOptionPane.showMessageDialog(this,"没选择文件");
			return;
		}
   	}
    else if(optionType == JOptionPane.CANCEL_OPTION )    {      
       try {
		this.setClosed(true);
	} catch (PropertyVetoException e) {	
		e.printStackTrace();
	} return;
    }else if(optionType == JOptionPane.NO_OPTION){
    	//关闭自己的代码怎么写？
    	
    }
}
public void internalFrameDeactivated(InternalFrameEvent arg0) {	
	
}
public void internalFrameDeiconified(InternalFrameEvent arg0) {	
	
}
public void internalFrameIconified(InternalFrameEvent arg0) {
	
}
public void internalFrameOpened(InternalFrameEvent arg0) {	
	
 }
public void undoableEditHappened(UndoableEditEvent arg0) {	
	undo.addEdit(arg0.getEdit());
}
public UndoManager getUndo() {
	return undo;
}   
}