buddytree.java

java实现msn的功能

					parent.remove( node );
					model.reload( parent );
					refreshGroupNode();
				}

				main.addEvent( Msg.get("event.logout.2", friend.getLoginName(),
					friend.getFormattedFriendlyName()), null );
			}
			else
				main.addEvent( Msg.get("event.logout.1", loginName), null );

			}});

			ChatDialog cd = (ChatDialog)dialogMap.get(loginName);
			if( cd!=null )
				cd.userOffline();
		}

		public void whoJoinSession( SwitchboardSession ss, final MsnFriend join )
		{
			String loginName = join.getLoginName();
			if( ss.getSessionId()==null )
				return;

			ChatDialog cd = null;
			if( (cd=(ChatDialog)sessionMap.get(ss.getSessionId()))==null )
			{
				if( (cd=(ChatDialog)dialogMap.get(loginName))==null )
					return;
				sessionMap.put( ss.getSessionId(), cd );
				cd.setSession( ss );
			}

			if( ss.getFriendCount()>1 )
			{
				MimeMessage msg = new MimeMessage();
				msg.setMessage( Msg.get("chatdlg.msg.whojoin", loginName,
					join.getFormattedFriendlyName()) );
				cd.appendMessage( msg );
			}
		}

		public void whoPartSession( SwitchboardSession ss, final MsnFriend part )
		{
		    String loginName = part.getLoginName();

			ChatDialog cd = null;
			if( (cd=(ChatDialog)sessionMap.get(ss.getSessionId()))!=null )
			{
				MimeMessage msg = new MimeMessage();

			    // 富绝捞 5盒 版苞窍搁 SS俊辑 磊悼栏肺 楷搬阑 谗绢滚赴促.
				// 酒贰狼 炼扒篮 泅犁矫埃焊促 5盒救俊 皋矫瘤啊 档馒窍瘤 臼疽阑锭 true捞促.
				if( (System.currentTimeMillis() - 300000L) > cd.getLastMessagingTime() )
					msg.setMessage( Msg.get("chatdlg.msg.timeout", "5") );
				else
				    msg.setMessage( Msg.get("chatdlg.msg.whopart", loginName,
						part.getFormattedFriendlyName()) );

			    cd.appendMessage( msg );
			}
		}

		public void switchboardSessionStarted( SwitchboardSession ss )
		{
			ss.setTimeout( 0 );

			final MsnFriend friend = ss.getMsnFriend();
			if( friend!=null )
			{
				SwingUtilities.invokeLater( new Runnable() {
					public void run()
					{
						main.addEvent( Msg.get("event.ring", friend.getLoginName(),
							friend.getFormattedFriendlyName()), friend );
					}
				});
			}
		}

		public void switchboardSessionEnded( SwitchboardSession ss )
		{
			ChatDialog cd = (ChatDialog)sessionMap.remove(ss.getSessionId());
			if( cd!=null )
			{
				cd.sessionClosed();
				return;
			}
		}

		public void switchboardSessionAbandon( SwitchboardSession ss, String targetName )
		{
		    ChatDialog cd = (ChatDialog)dialogMap.get( targetName );
			if( cd!=null )
			{
				cd.sessionClosed();
				MimeMessage msg = new MimeMessage();
				msg.setMessage( Msg.get("chatdlg.msg.ssclose") );
				cd.appendMessage( msg );
			}
		}

		public void buddyListModified()
		{
			nonUpdateCount--;
			if( nonUpdateCount < 0 )
			{
				SwingUtilities.invokeLater( new Runnable() {
					public void run()
					{
						syncAllUsers();
					}
				});
			}
		    if( nonUpdateCount < 0 )
				nonUpdateCount = 0;
		}

		public void progressTyping( SwitchboardSession ss, MsnFriend friend, String view )
		{
			String sid = ss.getSessionId();
			ChatDialog cd = (ChatDialog)sessionMap.get(sid);
			if( cd!=null )
			{
				cd.whoTyping( view );
			}
		}

		public void filePosted( SwitchboardSession ss, int cookie, String filename,
			int filesize )
		{
			String sid = ss.getSessionId();
			ChatDialog cd = (ChatDialog)sessionMap.get(sid);
			if( cd==null )
			{
				cd = new ChatDialog(main, msnm, ss, me);
				cd.setIconImage( chatIcon );
				cd.addWindowListener( new DisposeAdapter() );

				sessionMap.put( sid, cd );
				String ln = ss.getMsnFriend().getLoginName();
				if( !dialogMap.containsKey(ln) )
					dialogMap.put( ln, cd );
				cd.show();
				cd.requestFocus();
			}

			cd.addFileItem( new FileItem(ss,cookie,filename,filesize) );
		}

		public void allListUpdated()
		{
			SwingUtilities.invokeLater( new Runnable() {
				public void run()
				{
					syncAllUsers();
				}
			});
		}

		public void logoutNotify()
		{
		    SwingUtilities.invokeLater( new Runnable() {
				public void run()
				{
				    main.logout();
				}
			});
		}
	}

	private class DisposeAdapter extends WindowAdapter
	{
		/**
		 * sessionMap俊辑 sid俊 秦寸窍绰 Dialog甫 力芭窍绊,
		 * dialogMap俊辑 loginName俊 秦寸窍绰 Dialog甫 力芭窍绰 格利
		 */
		public void windowClosing( WindowEvent e )
		{
			ChatDialog cd = (ChatDialog)e.getSource();
			SwitchboardSession ss = cd.getSession();
			if( ss!=null )
			{
				sessionMap.remove( ss.getSessionId() );
				try
				{
					ss.close();
				}
				catch( IOException ex ) {}
			}
			cd.close();
			dialogMap.remove( cd.getTitle() );
		}
	}

	public void updateAllDialogs()
	{
		for(Enumeration e=dialogMap.elements(); e.hasMoreElements(); )
		{
			ChatDialog cd = (ChatDialog)e.nextElement();
			SwingUtilities.updateComponentTreeUI( cd );
		}
	}

    public void dragEnter(DragSourceDragEvent dsde)
    {

    }

    public void dragOver(DragSourceDragEvent dsde)
    {

	}

    public void dropActionChanged(DragSourceDragEvent dsde)
    {

    }

    public void dragExit(DragSourceEvent dse)
    {

    }

    public void dragDropEnd(DragSourceDropEvent dsde)
    {

    }

	private int dragStartGroup = -1;
	/**
	 * 靛贰弊甫 矫累窍妨绊 且锭, 捞霸 dnd甫 秦具登绰巴牢瘤 酒囱巴牢瘤
	 * 魄喊窍绊 父距 MsnFriend 牢胶畔胶啊 嘎促搁, startDrag 皋家靛肺
	 * 靛贰弊甫 矫累茄促.
	 *
	 * @param dge 捞亥飘 按眉
	 */
    public void dragGestureRecognized(DragGestureEvent dge)
    {
		Point p = dge.getDragOrigin();
		TreePath path = getPathForLocation( p.x, p.y );
		if( path==null )
	   		return;
		Object o = ((DefaultMutableTreeNode)path.getLastPathComponent()).getUserObject();
		if( o instanceof MsnFriend )
		{
		    MsnFriend friend = (MsnFriend)o;
			dragStartGroup = friend.getGroupIndex().intValue();
			String ln = friend.getLoginName();
			Transferable t = new StringSelection(ln);
			dragSource.startDrag( dge, DragSource.DefaultCopyDrop, t, this );
		}
    }

	// 咯扁辑何磐绰 DragTargetListener interface 狼 implement 何盒捞促.

    public void dragEnter(DropTargetDragEvent e)
    {

    }

	private int oldDraggingIndex = -1;

    public void dragOver(DropTargetDragEvent e)
    {
		Point p = e.getLocation();
		TreePath path = getPathForLocation( p.x, p.y );
		if( path==null )
	   		return;
		Object o = ((DefaultMutableTreeNode)path.getLastPathComponent()).getUserObject();

		int groupIndex = -1;
		if( o instanceof MsnFriend )
		{
		    MsnFriend f = (MsnFriend)o;
		    groupIndex = f==this.me ? -1 : f.getGroupIndex().intValue();
		}
		else
		if( o instanceof Group )
		{
			Group g = (Group)o;
			groupIndex = g.getIndexInt();
		}
		if( dragStartGroup==groupIndex )
		{
			groupIndex = -1;
			e.rejectDrag();
		}

		renderer.setDraggingGroup(groupIndex);
		if( oldDraggingIndex!=groupIndex )
		{
			oldDraggingIndex = groupIndex;
		    repaint();
		}
    }

    public void dropActionChanged(DropTargetDragEvent e)
    {

    }

    public void dragExit(DropTargetEvent e)
    {
		oldDraggingIndex = -1;
		renderer.setDraggingGroup(-1);
		repaint();
    }

    public void drop(DropTargetDropEvent e)
    {
		Point p = e.getLocation();
		TreePath path = getPathForLocation( p.x, p.y );
		if( path==null )
	   		return;

		oldDraggingIndex = -1;
		renderer.setDraggingGroup(-1);
		repaint();

		Object o = ((DefaultMutableTreeNode)path.getLastPathComponent()).getUserObject();
		int groupIndex = -1;
		if( o instanceof MsnFriend )
			groupIndex = ((MsnFriend)o).getGroupIndex().intValue();
		else
		if( o instanceof Group )
			groupIndex = ((Group)o).getIndexInt();
		if( dragStartGroup==groupIndex )
			return;

		try
		{
			String loginName = (String)e.getTransferable().getTransferData( DataFlavor.stringFlavor );
			e.acceptDrop( DnDConstants.ACTION_MOVE );
			e.getDropTargetContext().dropComplete( true );

		    BuddyList list = msnm.getBuddyGroup().getForwardList();
			MsnFriend friend = list.get(loginName);
			friend.setGroupIndex(groupIndex);

			nonUpdateCount = 2;
			// 角力肺 函版窍档废 瘤矫
		    msnm.moveGroupAsFriend( friend, dragStartGroup, groupIndex );
			// 捞哩 Tree俊辑 函版窍咯具 窃
			DefaultMutableTreeNode oldGroup = findGroupNode( new Integer(dragStartGroup) );
			DefaultMutableTreeNode newGroup = findGroupNode( new Integer(groupIndex) );
			DefaultMutableTreeNode nodeFriend = this.findTreeNode(friend);

			oldGroup.remove( nodeFriend );
			insertPreferredIndex( newGroup, friend, nodeFriend );

			model.reload( oldGroup );
			model.reload( newGroup );
		}
		catch( Exception ex )
		{
			e.rejectDrop();
		}
    }

	public void paintComponent( Graphics g )
	{
		g.setColor( Color.white );
		g.fillRect( 0, 0, getWidth(), getHeight() );
		if( backImage!=null )
		{
			JViewport view = (JViewport)getParent();
			Point p = view.getViewPosition();
			int w = view.getWidth();
			int h = view.getHeight();
			int iw = backImage.getWidth(null);
			int ih = backImage.getHeight(null);
			g.drawImage( backImage, w-iw+p.x, h-ih+p.y, null );
		}
		super.paintComponent( g );
	}
}