package XDEDM_Notepad;

import java.awt.*;                                                      //图形界面java库

import javax.lang.model.util.ElementScanner6;
import javax.swing.*;                                                   //GUI工具包
import java.awt.event.*;                                                //AWT事件包
import java.io.*;                                                       //输入输出
import java.awt.datatransfer.*;                                         //复制粘贴数据传输

public class XNotepad extends JFrame implements ActionListener,WindowListener {
    JTextArea XNarea = new JTexArea();
    File fnameContainer;

    public XNotepad(){
        Font fnt = new Font("SimSun",Font.PLAIN,15);     //宋体，15号
        
        Container con=getContentPane();

        JMenuBar XNb = new JMenuBar();                              //菜单栏目
        JMenu XNfile = new JMenu("文件");
        JMenu XNedit = new JMenu("编辑");
        JMenu XNhelp = new JMenu("编辑");
        JMenu XNelse = new JMenu("其他");

        con.setLayout(new BorderLayout());                          //边界布局

        JScrollPane sbrText = new JScrollPane(XNarea);              //滚动条(根据需要显示)
        sbrText.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);

        sbrText.setVisible(true);                             //显示滚动面板

        XNarea.setFont(fnt);                                        //设置字体
        XNarea.setLineWrap(true);                             //自动换行
        XNarea.setWrapStyleWord(true);                        //单词换行
        XNarea.setVisible(true);                             //显示文本域

        con.add(sbrText);                                           //添加滚动面板
        con.add(XNb,BorderLayout.NORTH);                            //添加菜单栏

        createMenuItem(XNfile,"新建");                              //创建菜单项
        createMenuItem(XNfile,"打开");  
        createMenuItem(XNfile,"保存");
        
        createMenuItem(XNedit,"复制");
        createMenuItem(XNedit,"剪切");
        createMenuItem(XNedit,"粘贴");
        createMenuItem(XNedit,"全选");
        createMenuItem(XNedit,"删除");
        
        createMenuItem(XNhelp,"字号");
        createMenuItem(XNhelp,"字体");
        createMenuItem(XNhelp,"缩放");

        createMenuItem(XNelse,"关于");
        createMenuItem(XNelse,"退出");

        XNb.add(XNfile);                                            //添加菜单
        XNb.add(XNedit);
        XNb.add(XNhelp);
        XNb.add(XNelse);

        setJMenBar(XNb);                                            //设置菜单栏

                                                                    //指定一个图片作为窗口的图标
        setIconImage(Toolkit.getDefaultToolkit().getImage("XNcat.jpg"));

        addWindowListener(this);                                    //添加窗口监听器
        setSize(500,500);                             //设置窗口大小
        setTitle("新建记事本.txt");                            //设置标题
        setVisible(true);                                         //显示窗口
    }

    public void createMenuItem(JMenu jm,String txt){                //创建菜单项
        JMenuItem jmfire = new JMenuItem(txt);                     //创建菜单项
        jmfire.addActionListener(this);                            //添加监听器
        jm.add(jmfire);
    }

    public void actionPerformed(ActionEvent e){
        JFileChooser jfc = new JFileChooser();                      //文件选择器

        if(e.getActionCommand().equals("新建")){
            this.setTitle("新建记事本.txt");
            XNarea.setText("");
            fnameContainer = null;

        }else if(e.getActionCommand().equals("打开")){
            int ret = jfc.showDialog(null,"打开");
            if(ret == JFileChooser.APPROVE_OPTION){
                try{
                    File f = jfc.getSelectedFile();
                    OpenFile(f.getAbsolutePath());
                    this.setTitle(f.getName());
                    fnameContainer = f;
                }catch(IOException ers){}                           //捕获异常
            }

        }else if(e.getActionCommand().equals("保存")){
            if(fnameContainer != null){
                jfc.setCurrentDirectory(fnameContainer);
                jfc.setSelectedFile(fnameContainer);
            }else{
                jfc.setSelectedFile(new File("新建记事本.txt"));
            }

        int ret = jfc.showDialog(null);

        if(ret == JFileChooser.APPROVE_OPTION){
            try{

                File fyl = jfc.getSelectedFile();
                SaveFile(fyl.getAbsolutePath());
                this.setTitle(fyl.getName());
                fnameContainer = fyl;

                }catch(Exception ers){}
            }
        }else if(e.getActionCommand().equals("复制")){
            XNarea.copy();

        }else if(e.getActionCommand().equals("剪切")){
            XNarea.cut();
            
        }else if(e.getActionCommand().equals("粘贴")){
            XNarea.paste();
            
        }else if(e.getActionCommand().equals("全选")){
            XNarea.selectAll();
            
        }else if(e.getActionCommand().equals("删除")){
            XNarea.replaceSelection("");
            
        }else if(e.getActionCommand().equals("字号")){
            
        }else if(e.getActionCommand().equals("字体")){
            
        }else if(e.getActionCommand().equals("缩放")){
            
        }else if(e.getActionCommand().equals("关于")){
            JOptionPane.showMessageDialog(this,"制作者:薛定谔的猫 团队","关于",JOptionPane.INFORMATION_MESSAGE);
            
        }else if(e.getActionCommand().equals("退出")){
            Exiting();
            
        }

    }

    private void OpenFile(String absolutePath) {
    }
}