package notepad;
import java.io.*;
import javax.swing.filechooser.FileNameExtensionFilter;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class HappyChat extends JFrame implements ItemListener,ListSelectionListener, ActionListener {
	JPanel pnlMain;
	JMenuBar mbMain;
	JMenu mnuSystem,mnuHelp;
	JPopupMenu	popMenu;
	JMenuItem mnuiCls,mnuiOpen,mnuiSave,mnuiClock,mnuiExit,
	mnuiContent,mnuiIndex,mnuiAbout,popOpen,popSave;
	JLabel lblUser,lblNumber,lblInfo;
	JLabel lblYou,lblContent,lblFile;
	DefaultListModel dlmUser;
	JList lstUser;
	JTextArea taInfo;

	JScrollPane jspInfo;
	JComboBox cmbUser;
	JCheckBox ckbSilent;
	JTextField txtContent,txtFile;
	JButton btnSend,btnSave,btnExit,btnCls,btnClock,
	btnSendFile,btnBrowse;
	JFileChooser fc;
	FileNameExtensionFilter filter;
	FileWriter fw;
	FileInputStream fis;
	
	//構造器部分
	public HappyChat()
	{
		//組件初始化
		fc=new JFileChooser();
		
		mbMain=new JMenuBar();
		pnlMain=new JPanel(null);
		setContentPane(pnlMain);
		mnuSystem=new JMenu("系統(S)");
		mnuSystem.setMnemonic(KeyEvent.VK_S);
		mnuHelp=new JMenu("幫助(H)");
		mnuHelp.setMnemonic(KeyEvent.VK_H);
		mbMain.add(mnuSystem);
		mbMain.add(mnuHelp);
		mnuiCls=new JMenuItem("清除屏幕顯示信息");
		mnuiOpen=new JMenuItem("打開文件");
		mnuiSave=new JMenuItem("保存聊天記錄");
		mnuiClock=new JMenuItem("查看時間");
		Icon icoExit=new ImageIcon("e:/java/images/exit.gif");
		mnuiExit=new JMenuItem("退出系統(X)",icoExit);
		mnuiExit.setMnemonic('X');
		Icon icoContent=new ImageIcon("e:/java/images/content.gif");
		mnuiContent=new JMenuItem("目錄",icoContent);
		mnuiIndex=new JMenuItem("索引");
		mnuiAbout=new JMenuItem("關于[HappyChat]聊天系統");
	
		mnuHelp.add(mnuiOpen);
		mnuHelp.add(mnuiContent);
		mnuHelp.add(mnuiIndex);
		mnuHelp.add(mnuiAbout);
		mnuSystem.add(mnuiCls);
		mnuSystem.add(mnuiOpen);
		mnuSystem.add(mnuiSave);
		mnuSystem.add(mnuiClock);
		mnuSystem.addSeparator();
		mnuSystem.add(mnuiExit);
		
		popMenu=new JPopupMenu();//設置快捷菜單
		popOpen=new JMenuItem("打開文件");
		popSave=new JMenuItem("保存文件");
		popMenu.add(popOpen);
		popMenu.add(popSave);
		lblUser=new JLabel("【在線用戶列表】");
		lblNumber=new JLabel("在線人數:");
		lblInfo=new JLabel("【聊天信息】");
		lblYou=new JLabel("你對:");
		lblContent=new JLabel("聊天內容:");
		lblFile=new JLabel("附件:");
		dlmUser=new DefaultListModel();
		dlmUser.addElement("張三");
		dlmUser.addElement("李四");
		dlmUser.addElement("liuzc");
		dlmUser.addElement("wangym");
		lstUser=new JList(dlmUser);
		lstUser.setSelectedIndex(0);
		lstUser.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		lblNumber.setText(lblNumber.getText()+String.valueOf(dlmUser.getSize()));
		taInfo=new JTextArea();
		jspInfo=new JScrollPane(taInfo);
		taInfo.append("【你】對【所有人】說:大家好!");
		taInfo.append("\n【liuzc】說:大家好!");
		taInfo.setEditable(false);
		final String strUser[]={"所有人","張三","李四","劉德華","張學友","劉亦菲"}; 
		cmbUser=new JComboBox(strUser); 
		ckbSilent=new JCheckBox("私聊");
		ckbSilent.setEnabled(false);
		txtContent=new JTextField(200);
		txtFile=new JTextField(300);
		btnSend=new JButton("發送(N)");
		btnSave=new JButton("保存(S)");
		btnExit=new JButton("退出(X)");
		btnCls=new JButton("清屏(C)");
		btnClock=new JButton("時鐘(T)");
		btnSendFile=new JButton("發送文件(F)");
		btnBrowse=new JButton("瀏覽...");
		btnClock.addActionListener(this);
		//設置按鈕快捷鍵

		btnSend.setMnemonic('N');
		btnSave.setMnemonic('S');
		btnExit.setMnemonic('X');
		btnCls.setMnemonic('C');
		btnClock.setMnemonic('T');
		btnSendFile.setMnemonic('F');
		//設置組件事件
		btnBrowse.addActionListener(this);
		btnSend.addActionListener(this);
		btnCls.addActionListener(this);
		btnExit.addActionListener(this);
		lstUser.addListSelectionListener(this);
		cmbUser.addItemListener(this);
		mnuiOpen.addActionListener(this);
		mnuiCls.addActionListener(this);
		mnuiExit.addActionListener(this);
		popOpen.addActionListener(this);
		btnSave.addActionListener(this);
		taInfo.addMouseListener(
				new MouseAdapter()
				{
					public void mousePressed(MouseEvent me)
					{
						if(me.getButton()==MouseEvent.BUTTON3&& !me.isPopupTrigger())
							popMenu.show(me.getComponent(), me.getX(), me.getY());
					}
				}
		);
		//設置窗體背景圖片
		Icon logo=new ImageIcon("E:/java/images/chat.jpg");
		JLabel lblLogo=new JLabel(logo);
		setTitle("聊天室(HappyChar)");
		Toolkit tk=Toolkit.getDefaultToolkit();
		Image img=tk.getImage("E:/java/images/appico.jpg");
		this.setIconImage(img);
		//添加組件
		pnlMain.add(lblUser);
		pnlMain.add(lblNumber);
		pnlMain.add(lblInfo);
		pnlMain.add(lblYou);
		pnlMain.add(lblContent);
		pnlMain.add(lblFile);
		pnlMain.add(lstUser);
		pnlMain.add(jspInfo);
		pnlMain.add(cmbUser);
		pnlMain.add(ckbSilent);
		pnlMain.add(txtContent);
		pnlMain.add(txtFile);
		pnlMain.add(btnSend);
		pnlMain.add(btnSave);
		pnlMain.add(btnExit);
		pnlMain.add(btnCls);
		pnlMain.add(btnClock);
		pnlMain.add(btnSendFile);
		pnlMain.add(btnBrowse);
		pnlMain.add(lblLogo);
		pnlMain.add(btnSend);
		//設置組件位置
		lblLogo.setBounds(0,0,600,400);
		lblUser.setBounds(5,10,120,25);
		lblNumber.setBounds(140, 10, 80, 25);
		lblInfo.setBounds(240, 10, 80, 25);
		lstUser.setBounds(5, 40, 200, 280);
		jspInfo.setBounds(210, 40, 380, 280);
		lblYou.setBounds(8, 320, 40, 30);
		cmbUser.setBounds(45, 325, 80, 20);
		ckbSilent.setBounds(130, 325, 60, 20);
		lblContent.setBounds(200, 320, 70, 30);
		txtContent.setBounds(270, 325, 200, 20);
		lblFile.setBounds(8,345,40,30);
		txtFile.setBounds(45,350,300,20);
		btnSend.setBounds(500,325,80,20);
		btnSave.setBounds(500,350,80,20);
		btnExit.setBounds(500,375,80,20);
		btnCls.setBounds(400,350,80,20);
		btnClock.setBounds(400,375,80,20);
		btnBrowse.setBounds(155, 375, 80, 20);
		btnSendFile.setBounds(225, 375, 120, 20);
		//btnSend.setBounds(50,50,30,30);
		
		//窗體初始化
		this.setJMenuBar(mbMain);
		Dimension scrnSize=tk.getScreenSize();
		setSize(600,455);
		setLocation((scrnSize.width-this.getWidth())/2,(scrnSize.height-this.getHeight())/2);
		setVisible(true);
		this.setResizable(false);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		
	}
	@Override
	public void itemStateChanged(ItemEvent ie) {
		// TODO Auto-generated method stub
		Object oi=ie.getSource();
		if(oi==cmbUser)
		{
			if(cmbUser.getSelectedIndex()!=0)
			{
				ckbSilent.setEnabled(true);
			}
			else
				ckbSilent.setEnabled(false);
		}
	}
	public void actionPerformed(ActionEvent ae)
	{
		Object o=ae.getSource();
		if(o==btnSend && !txtContent.getText().equals(""))
		{
			if(ckbSilent.isSelected())
			{
				taInfo.append("\n【你】悄悄對"+"【"+cmbUser.getSelectedItem()+"】說: "+txtContent.getText());
				txtContent.requestFocus();
			}
			else
			{
				taInfo.append("\n【你】對"+"【"+cmbUser.getSelectedItem()+"】說: "+txtContent.getText());
				txtContent.requestFocus();
				System.out.println(cmbUser.getItemCount());
			}
		}
		if(o.equals(btnExit)||o.equals(mnuiExit))
		{
			int  option=JOptionPane.showConfirmDialog(null, "確定要退出嗎?", "提示", JOptionPane.YES_NO_OPTION);
			if(option==0)
				System.exit(0);
		}
		if(o.equals(btnCls)||o.equals(mnuiCls))
			taInfo.setText("");
		if(o.equals(btnBrowse)||o.equals(mnuiOpen)||o.equals(popOpen))
		{
			int fcVal=fc.showOpenDialog(this);
			if(fcVal==JFileChooser.APPROVE_OPTION)
				txtFile.setText(fc.getSelectedFile().toString());
		}
		if(o.equals(btnSave))
		{
			toSave();
		}
	}
	//保存按鈕事件
	public void toSave()
	{
		if(!taInfo.getText().equals(null))
		{
			
		    filter = new FileNameExtensionFilter("txt文件", "txt");
		    fc.setFileFilter(filter);
			int temp=fc.showSaveDialog(this);
			String strFile=fc.getSelectedFile().toString();
			if(strFile.indexOf(".txt")==-1)
			{
				strFile=strFile+".txt";
			}
			if(temp==JFileChooser.APPROVE_OPTION)
			{
				try
				{
					fw=new FileWriter(strFile);
					fw.write(taInfo.getText());
					fw.close();
					
					JOptionPane.showMessageDialog(null, "保存成功!");
				}
				catch(Exception e)
				{
					JOptionPane.showMessageDialog(null, "保存失敗!");
				}
				
			}
		}
	}
	public void valueChanged(ListSelectionEvent lse)
	{
		Boolean tUser=true;
		String strUser=String.valueOf(lstUser.getSelectedValue());
		for(int i=0;i<cmbUser.getItemCount();i++)
		{
			if(strUser==String.valueOf(cmbUser.getItemAt(i)))
			{
				tUser=false;
				break;
			}
		}
		if(tUser)
			cmbUser.addItem(strUser);
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method s
		new HappyChat();
		
	}
}