view.java

实现简单的通信功能,让自己掌握socket编程

package com.tarena.chat1;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class View extends JFrame implements IView {
	private JTextArea chatArea;
	private JTextField msgTxt;
	private Container container;
	private ISender sender;
	public View(ISender sender) {
		this.sender = sender;
		container = getContentPane();
		setSize(400, 600);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		initGUI();
	}
	private void initGUI() {
		container.setLayout(new BorderLayout());
		JLabel lbl = new JLabel("Welcome to my chat room");
		container.add(lbl, BorderLayout.NORTH);
		chatArea = new JTextArea();
		chatArea.setEditable(false);
		chatArea.setLineWrap(true);
		container.add(new JScrollPane(chatArea), 
				BorderLayout.CENTER);
		msgTxt = new JTextField(80);
		container.add(msgTxt, BorderLayout.SOUTH);
		msgTxt.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				String content = msgTxt.getText();
				if (content == null || 
						content.trim().length() == 0 ||
						content.trim().length() > 1000 ||
						content.indexOf(Helper.TAG)>=0) {
					return;
				}
				sender.send(content);
				msgTxt.setText("");
			}
		});
	}
	public void addMsg(IMessage message) {
		String user = message.getUser();
		String address = message.getAddress();
		String content = message.getMsg();
		String time = message.getTime();
		String msg = user + "(" + address + ") "+time+">" 
			+ content + "\n";
//		String msg = user + "(" + time + "):  " 
//		+ content + "\n";
		msg = msg + chatArea.getText();
		chatArea.setText(msg);
	}
	public void showMe(String title) {
		Dimension screenSize =Toolkit.getDefaultToolkit()
			.getScreenSize();
		setLocation((int)(screenSize.getWidth()- getWidth()) / 2,
				(int)(screenSize.getHeight()- getHeight()) / 2);
		setTitle(title);
		setVisible(true);
	}
}