chatwindow.java

可以实现P2P聊天通信

package jxtamessenger;

import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Logger;

import jxtamessenger.bean.OnlineMessage;
import jxtamessenger.service.JxtaServerSocketService;
import jxtamessenger.util.Constants;
import jxtamessenger.util.MiscUtil;
import jxtamessenger.util.PipeUtil;
import jxtamessenger.xml.XmlCreator;
import net.jxta.peergroup.PeerGroup;
import net.jxta.socket.JxtaSocket;

import org.apache.commons.lang.StringUtils;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.SashForm;
import org.eclipse.swt.events.ControlAdapter;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class ChatWindow extends Window {
	private static final Logger LOG = Logger.getLogger(ChatWindow.class.getName());
	private JxtaSocket socket;
	private OnlineMessage msg;
	private PeerGroup pg;
	
	private static final int BTNWIDTH = 32;
	private static final int BTNHEIGHT = 22;
	
	private Text up_text;
	public Text getUp_text() {
		return up_text;
	}
	private Text down_text;
//	public Text getDown_text() {
//		return down_text;
//	}
	private Button down_send;
//	public Button getDown_send() {
//		return down_send;
//	}
	public void disableInputAndSend(String userName) {
		down_text.setText(userName + "已离开会话");
		down_text.setEnabled(false);
		down_send.setEnabled(false);
	}
	
	public void enableInputAndSend() {
        try {
        	// TODO: Terminated gracefully
//    		if(!socket.isClosed())
//    			socket.close();
			socket = new JxtaSocket(pg,
			        null,	//no specific peerid
			        PipeUtil.findPipeAdv(pg, JxtaServerSocketService.JxtaServerSocketPipeAdvPrefix + msg.getHostName()),
			        60000,	//general TO: 60 seconds
			        true);	// reliable connection
		} catch (IOException e) {
			LOG.warning("JxtaSocket initialize failed!");
			e.printStackTrace();
		}
		down_text.setText("");
		down_text.setEnabled(true);
		down_send.setEnabled(true);
	}
	
	public ChatWindow(Shell parentShell, PeerGroup pg, OnlineMessage msg) {
		super(parentShell);
		this.msg = msg;
		this.pg = pg;
        try {
			socket = new JxtaSocket(pg,
			        null,	//no specific peerid
			        PipeUtil.findPipeAdv(pg, JxtaServerSocketService.JxtaServerSocketPipeAdvPrefix + msg.getHostName()),
			        60000,	//general TO: 60 seconds
			        true);	// reliable connection
		} catch (IOException e) {
			LOG.warning("JxtaSocket initialize failed!");
			e.printStackTrace();
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.window.Window#createContents(org.eclipse.swt.widgets.Composite)
	 */
	@Override
	protected Control createContents(Composite parent) {
		SashForm form = new SashForm(parent, SWT.VERTICAL);
		form.setLayout(new FillLayout());
		
		Composite up = new Composite(form,SWT.NONE);
		up.setLayout(new FillLayout());
		up_text = new Text(up, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL | SWT.READ_ONLY | SWT.H_SCROLL);
		up_text.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_WHITE));

		Composite down = new Composite(form,SWT.NONE);
		down.setLayout(new FillLayout());
		down_text = new Text(down, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL | SWT.H_SCROLL);
		down_text.addControlListener(new ControlAdapter() {
			public void controlResized(ControlEvent e) {
				Text source = (Text)e.getSource();
				source.setSize(source.getParent().getSize().x - BTNWIDTH-8, source.getParent().getSize().y);
			}
		});
		down_text.setFocus();

		down_send = new Button(down, SWT.PUSH);
		down_send.setText("发送");
		down_send.addControlListener(new ControlAdapter() {
			public void controlResized(ControlEvent e) {
				Button source = (Button)e.getSource();
				source.pack();
				int x = source.getParent().getSize().x - BTNWIDTH - 4;
				int y = (source.getParent().getSize().y - BTNHEIGHT)/2;
				source.setLocation(x, y);
			}
		});
		
		down_text.addKeyListener(new KeyAdapter() {
			public void keyPressed(KeyEvent event) {
				// CTRL+A --- Select All
				if(event.stateMask == SWT.CTRL && event.keyCode == 'a')	// If has better mothed?
					down_text.selectAll();
/*				// when user clicks CTRL+RETURN, then send the message, just like down_send button is clicked!
 * 				else if(event.stateMask == SWT.CTRL && (event.keyCode == SWT.CR || event.keyCode == SWT.LF)) {
					if(!StringUtils.isEmpty(down_text.getText())) {
						try {
							down_send.setEnabled(false);
							OutputStream out = (OutputStream) socket.getOutputStream();
							DataOutput dos = new DataOutputStream(out);
							dos.writeInt(Constants.MESSAGE_CHAT);

							Object[] chatMsgArr = MiscUtil.splitUTFString(XmlCreator.createChatMessage(down_text.getText()));
							dos.writeInt(chatMsgArr.length);
							for(int i=0; i<chatMsgArr.length; i++)
								dos.writeUTF((String)chatMsgArr[i]);
							
							up_text.append(MiscUtil.getUserName());
							up_text.append(":");
							up_text.append(down_text.getText());
							*//**
							 * @see org.eclipse.swt.widgets.Text.sendKeyEvent
							 *//*
							up_text.append("\r");
							down_text.setText("");
							out.flush();
							down_send.setEnabled(true);
						} catch (IOException e) {
							LOG.warning("Send chat message failed.");
							e.printStackTrace();
						}
					}					
				}*/
			}
		});
		down_send.addMouseListener(new MouseAdapter() {
			public void mouseUp(MouseEvent event) {
				if(!StringUtils.isEmpty(down_text.getText())) {
					try {
						down_send.setEnabled(false);
						OutputStream out = (OutputStream) socket.getOutputStream();
						DataOutput dos = new DataOutputStream(out);
						dos.writeInt(Constants.MESSAGE_CHAT);

						Object[] chatMsgArr = MiscUtil.splitUTFString(XmlCreator.createChatMessage(down_text.getText()));
						dos.writeInt(chatMsgArr.length);
						for(int i=0; i<chatMsgArr.length; i++)
							dos.writeUTF((String)chatMsgArr[i]);
						
						up_text.append(MiscUtil.getUserName());
						up_text.append(":");
						up_text.append(down_text.getText());
						up_text.append("\r\n");	// hard-code cariage return
						down_text.setText("");
						out.flush();
						down_send.setEnabled(true);
					} catch (IOException e) {
						// TODO: 发送失败
						LOG.warning("Send chat message failed.");
						e.printStackTrace();
					}
				}
			}
		});
		
		form.setWeights(new int[] {60,40});
		
		return parent;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets.Shell)
	 */
	@Override
	protected void configureShell(Shell newShell) {
		super.configureShell(newShell);

		newShell.setSize(300, 250);
		
		FillLayout layout = new FillLayout();
		layout.type = SWT.VERTICAL;
		layout.marginWidth = 4;
		layout.marginHeight = 4;
		newShell.setLayout(layout);
		
		newShell.setText("与" + msg.getUserName() + "交谈");
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.window.Window#close()
	 */
	@Override
	public boolean close() {
		try {
			MainApplicationWindow.chatwin.remove(msg.getHostName());
			OutputStream out = (OutputStream) socket.getOutputStream();
			DataOutput dos = new DataOutputStream(out);
			dos.writeInt(Constants.MESSAGE_EXITWINDOW);
//			dos.writeUTF(MiscUtil.getHostName());
//			dos.writeUTF(MiscUtil.getUserName());
			out.flush();
			out.close();
			// TODO: Close socket gracefully!
//			socket.close();
		} catch (IOException e) {
			LOG.warning("JxtaSocket close failed!");
			e.printStackTrace();
		}
		
		LOG.info("super.close()");
		return super.close();
	}
	
	
}