chatwindow.java

基于p2p的软件开发

/*
 * Copyright (c) 2001 Sun Microsystems,	Inc.  All rights reserved.
 *
 * Redistribution and use in source and	binary forms, with or without
 * modification, are permitted provided	that the following conditions
 * are met:
 *
 * 1. Redistributions of source	code must retain the above copyright
 *    notice, this list	of conditions and the following	disclaimer.
 *
 * 2. Redistributions in binary	form must reproduce the	above copyright
 *    notice, this list	of conditions and the following	disclaimer in
 *    the documentation	and/or other materials provided	with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *	 "This product includes	software developed by the
 *	 Sun Microsystems, Inc.	for Project JXTA."
 *    Alternately, this	acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally	appear.
 *
 * 4. The names	"Sun", "Sun Microsystems, Inc.", "JXTA"	and "Project JXTA" must
 *    not be used to endorse or	promote	products derived from this
 *    software without prior written permission. For written
 *    permission, please contact Project JXTA at http://www.jxta.org.
 *
 * 5. Products derived from this software may not be called "JXTA",
 *    nor may "JXTA" appear in their name, without prior written
 *    permission of Sun.
 *
 * THIS	SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A	PARTICULAR PURPOSE ARE
 * DISCLAIMED.	IN NO EVENT SHALL SUN MICROSYSTEMS OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,	INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL	DAMAGES	(INCLUDING, BUT	NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE,	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE,	EVEN IF	ADVISED	OF THE POSSIBILITY OF
 * SUCH	DAMAGE.
 *
 *====================================================================
 *
 * This	software consists of voluntary contributions made by many
 * individuals on behalf of Project JXTA.  For more
 * information on Project JXTA,	please see <http://www.jxta.org/>.
 *
 * This	license	is based on the	BSD license adopted by the Apache Foundation.
 *
 * $Id: ChatWindow.java,v 1.3 2006/02/21 13:57:50 benzht Exp $
 *
 */

package	net.jxta.jxtaview;

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

import net.jxta.protocol.PeerGroupAdvertisement;
import net.jxta.protocol.PeerAdvertisement;


/*
 * ChatWindow: Instant Messaging for JxtaView.
 *
 */
public class ChatWindow	extends	JPanel implements ActionListener {

    // Class encapsulating the peer-2-peer networking protocols.
    // It's either JXTA	or a JXTA simulation, depending	on how the
    // demo is launched.
    //
    P2PFace p2p;

    // We're chatting with this	guy, in	this group.
    PeerAdvertisement peer;
    PeerGroupAdvertisement group;

    // On-screen controls.
    JFrame frame;
    TextArea  conversation;
    TextField inputLine;


    public ChatWindow(P2PFace p2p,
		      PeerGroupAdvertisement group,
		      PeerAdvertisement peer) {
	
	this.p2p = p2p;
	this.group = group;
	this.peer = peer;

	// Component layout management.
	GridBagLayout gbl = new	GridBagLayout();
	setLayout(gbl);
	GridBagConstraints gbc = new GridBagConstraints();
	gbc.anchor = GridBagConstraints.NORTHWEST;
	gbc.fill = GridBagConstraints.HORIZONTAL;
	gbc.insets = new Insets(10, 10,	0, 10);	  // Top, left,	bottom,	right

	// Conversation: listing of the	chat so	far.
	String msg = "Now chatting with	" + peer.getName() + ", in the peergroup " +
		     group.getName() + ".  Type your message in the box below, and " +
		     "press <Enter> to send.\n\n";
	conversation = new TextArea(msg, 15, 50, TextArea.SCROLLBARS_VERTICAL_ONLY);
	conversation.setEditable(false);
	add(conversation);
	gbl.setConstraints(conversation, gbc);

	// Input text area, for	new chat message to send.
	inputLine = new	TextField(50);
	inputLine.addActionListener(this);
	add(inputLine);
	gbc.gridx = 0;
	gbc.gridy = 1;
	gbc.insets = new Insets(10, 10,	10, 10);   // Top, left, bottom, right
	gbl.setConstraints(inputLine, gbc);

	// Chat	window frame.
	String title = "JxtaView Instant Messaging - " + peer.getName();
	frame =	new JFrame(title);
	frame.getContentPane().add("Center", this);
	frame.setLocation(150, 50);
	frame.pack();
	frame.setVisible(true);
    }


    /**
    * Called when user presses <Enter> in the inputLine	field.
    * @param evt the  triggering ActionEvent
    */	
    public void	actionPerformed(ActionEvent evt) {

	String message = inputLine.getText();
        conversation.append(p2p.getMyPeerName() + "> " + message + "\n");
	inputLine.setText("");
    }
}