/*
	此類是創建郵件登錄界面
*/
import java.sql.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JOptionPane;
public class Login extends JDialog implements ActionListener
{
	private static final int WINDOW_WIDTH=220;
	
	private static final int WINDOW_HEIGHT=100;
	
	private static final int FIELD_WIDTH=15;
	
	private static final Point LOCATION=new Point(220,250);
	
	private JLabel user_ID_Label=new JLabel("用戶名");
	
	private JTextField user_ID= new JTextField(FIELD_WIDTH);
	
	private JLabel user_Password_Label=new JLabel("密碼");
	
	private JPasswordField user_Password= new JPasswordField(FIELD_WIDTH);
	
	private JButton yes=new JButton("確定");
	
	private JButton quit=new JButton("退出");
	
	private Panel label=new Panel();
	
	private Panel text=new Panel();
	
	private Panel button=new Panel();
	
	private Panel up=new Panel();
	
	private Panel whole=new Panel();
	
    private String userID,userPassword;

	
	//初始化登錄窗口
	public Login(JFrame jf)
	{
		super(jf,"登錄：",true);
		
	    setSize(WINDOW_WIDTH,WINDOW_HEIGHT);
		
		label.setLayout(new GridLayout(2,1));
		
		label.add(user_ID_Label);
		
		label.add(user_Password_Label);
		
		text.setLayout(new GridLayout(2,1));
		
		text.add(user_ID);
		
		text.add(user_Password);
		
		button.setLayout(new GridLayout(1,2));
		
		button.add(yes);
		
		button.add(quit);
		
		yes.addActionListener(this);
		
		quit.addActionListener(this);
		
		up.setLayout(new BorderLayout());
		
		up.add(label,BorderLayout.WEST);
		
		up.add(text,BorderLayout.EAST);
		
		whole.setLayout(new BorderLayout());
		
		whole.add(up,BorderLayout.NORTH);
		
		whole.add(button,BorderLayout.CENTER);
		
		add(whole);
		
		setLocation(LOCATION);
		
		setResizable(false);
    
		show();
		
	}
	
	
	//返回用戶名
	
	public String getUserName()
	
	{
		return userID;
	}
	
	
	//返回用戶密碼
	public String getUserPassword()
	{
		return userPassword;
	}
	
	
	//偵聽事件接口
	public void actionPerformed(ActionEvent e)
	
	{
		if(e.getActionCommand()=="確定")
		
		{
			userID = user_ID.getText().trim();
			
			userPassword = user_Password.getText().trim();

			this.dispose();
	
		}
		
		else{
			
			System.exit(1);
		}
	}
			
}