friendpanel.java

该系统是一个基于p2p的即时聊天系统

/*
 * @(#) FriendPanel.java
 * Copyright 2004 HWStudio. All rights reserved.
 */
package hws.item.smart.panel.function.admin;
//导入核心Java类库
import java.awt.Insets;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.util.List;
import javax.swing.JTree;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JSplitPane;
import javax.swing.JScrollPane;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeSelectionModel;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
//导入自定义Java类库
import hws.item.smart.misc.ImageShop;
import hws.item.smart.misc.SBChanger;
import hws.item.smart.panel.function.admin.misc.UserInfoPanel;
import hws.item.smart.action.admin.friend.StopFriendAction;
import hws.item.smart.action.admin.friend.StartFriendAction;
import hws.item.smart.action.admin.friend.RestartFriendAction;
import hws.item.smart.utility.chat.UserInfo;
import hws.item.smart.utility.admin.XMLAccessor;
import hws.item.smart.utility.admin.FriendService;
/**
 * 好友服务面板
 *
 * @version 0.1 2005-08-22
 * @author Hwerz
 */
public class FriendPanel extends JPanel {
    /*------------------------------------------------------------------------*
     *                                属性定义                                *
     *------------------------------------------------------------------------*/
    /**
     * 好友树根节点
     */
    private static final DefaultMutableTreeNode FRIEND_ROOT =
        new DefaultMutableTreeNode("用户好友");
    /**
     * 该类自身的一个静态引用
     */
    private static FriendPanel panel;
    /**
     * 好友视图面板
     */
    private FriendViewPanel friendViewPanel;
    /**
     * 用户信息面板
     */
    private UserInfoPanel userInfoPanel;
    /*------------------------------------------------------------------------*
     *                                构造函数                                *
     *------------------------------------------------------------------------*/
    /**
     * 构造函数为私有，这样在整个运行过程中该类就只能有一个实例
     */
    private FriendPanel() {
        super(new GridBagLayout());
        //启动好友服务
        FriendService.getInstance().start();
        //工具栏面板
        GridBagConstraints constraints = new GridBagConstraints(
            //gridx, gridy
            0, 0,
            //gridwidth, gridheight
            1, 1,
            //weightx, weighty
            1.0, 0.0,
            //anchor
            GridBagConstraints.NORTH,
            //fill
            GridBagConstraints.HORIZONTAL,
            //insets
            new Insets(5, 0, 0, 0),
            //ipadx, ipady
            0, 0);
        add(new Toolbar(), constraints);
        //分割条面板
        userInfoPanel = new UserInfoPanel();
        friendViewPanel = new FriendViewPanel();
        JSplitPane spliter = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, false,
            friendViewPanel, userInfoPanel);
        spliter.setOneTouchExpandable(true);
        spliter.setDividerLocation(200);
        constraints.gridy = 1;
        constraints.weighty = 1.0;
        constraints.fill = GridBagConstraints.BOTH;
        constraints.insets = new Insets(5, 5, 5, 5);
        add(spliter, constraints);
    }
    /*------------------------------------------------------------------------*
     *                                公共方法                                *
     *------------------------------------------------------------------------*/
    /**
     * 对该类提供的一个全局访问点，用来实例化该对象
     *
     * @return 该类唯一的一个实例
     */
    public static FriendPanel getInstance() {
        if (panel == null) {
            panel = new FriendPanel();
        }
        return panel;
    }
    /**
     * 刷新
     */
    public void refresh() {
        friendViewPanel.reloadFriends();
    }
    /*------------------------------------------------------------------------*
     *                                 内部类                                 *
     *------------------------------------------------------------------------*/
    /**
     * 工具栏面板
     */
    class Toolbar extends JPanel {
        /**
         * Create a new instance of this class
         */
        public Toolbar() {
            super(new FlowLayout(FlowLayout.CENTER, 5, 0));
            //启动服务
            JButton button = new JButton(StartFriendAction.getInstance());
            button.setIcon(ImageShop.START_IMAGEICON);
            button.addMouseListener(new SBChanger(
                StartFriendAction.getInstance().getHintInfo(), false));
            add(button);
            //停止服务
            button = new JButton(StopFriendAction.getInstance());
            button.setIcon(ImageShop.STOP_IMAGEICON);
            button.addMouseListener(new SBChanger(
                StopFriendAction.getInstance().getHintInfo(), false));
            add(button);
            //重启服务
            button = new JButton(RestartFriendAction.getInstance());
            button.setIcon(ImageShop.RESTART_IMAGEICON);
            button.addMouseListener(new SBChanger(
                RestartFriendAction.getInstance().getHintInfo(), false));
            add(button);
        }
    }
    /**
     * 好友视图面板
     */
    class FriendViewPanel extends JPanel implements TreeSelectionListener {
        /**
         * 好友树的视图
         */
        private JTree friendTree;
        /**
         * 好友树的模型
         */
        private DefaultTreeModel friendModel;
        /**
         * Create a new instance of this class
         */
        public FriendViewPanel() {
            super(new GridBagLayout());
            //好友视图标签
            GridBagConstraints constraints = new GridBagConstraints(
                //gridx, gridy
                0, 0,
                //gridwidth, gridheight
                1, 1,
                //weightx, weighty
                0.0, 0.0,
                //anchor
                GridBagConstraints.NORTHWEST,
                //fill
                GridBagConstraints.NONE,
                //insets
                new Insets(0, 5, 0, 0),
                //ipadx, ipady
                0, 0);
            add(new JLabel("好友视图"), constraints);
            //树型组件
            friendModel = new DefaultTreeModel(FRIEND_ROOT);
            friendTree = new JTree(friendModel);
            friendTree.addTreeSelectionListener(this);
            loadFriends();
            setTree();
            setTreeCellRenderer();
            JScrollPane scroller = new JScrollPane(friendTree,
                JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
            constraints.gridy = 1;
            constraints.weightx = 1.0;
            constraints.weighty = 1.0;
            constraints.fill = GridBagConstraints.BOTH;
            constraints.insets = new Insets(0, 0, 0, 0);
            add(scroller, constraints);
        }
        /**
         * 重载好友
         */
        public void reloadFriends() {
            unloadFriends();
            loadFriends();
        }
        /**
         * 装载好友
         */
        private void loadFriends() {
            List users = XMLAccessor.getAllUsers();
            for (int i = 0; i < users.size(); i++) {
                UserInfo info = (UserInfo) users.get(i);
                DefaultMutableTreeNode child = new DefaultMutableTreeNode(info);
                List friends = info.getFriendsInfo().getAllFriends();
                for (int j = 0; j < friends.size(); j++) {
                    String id = String.valueOf(friends.get(j));
                    DefaultMutableTreeNode child2 =
                        new DefaultMutableTreeNode(XMLAccessor.getUser(id));
                    child.add(child2);
                }
                friendModel.insertNodeInto(child, FRIEND_ROOT, i);
            }
            friendTree.expandRow(0);
            friendTree.setSelectionRow(0);
        }
        /**
         * 卸载好友
         */
        private void unloadFriends() {
            int count = FRIEND_ROOT.getChildCount();
            for (int i = 0; i < count; i++) {
                friendModel.removeNodeFromParent(
                    (DefaultMutableTreeNode) FRIEND_ROOT.getChildAt(0));
            }
        }
        /**
         * 设置树型组件的附加选项
         */
        private void setTree() {
            DefaultTreeSelectionModel model = new DefaultTreeSelectionModel();
            model.setSelectionMode(model.SINGLE_TREE_SELECTION);
            friendTree.setSelectionModel(model);
            friendTree.setSelectionRow(0);
            friendTree.expandRow(0);
        }
        /**
         * 设置树型组件的单元格渲染器
         */
        private void setTreeCellRenderer() {
            final DefaultTreeCellRenderer renderer1 =
                (DefaultTreeCellRenderer) friendTree.getCellRenderer();
            DefaultTreeCellRenderer renderer2 = new DefaultTreeCellRenderer() {
                public Component getTreeCellRendererComponent(JTree tree,
                    Object value, boolean selected, boolean expanded,
                    boolean leaf, int row, boolean hasFocus) {
                    Component c = renderer1.getTreeCellRendererComponent(tree,
                        value, selected, expanded, leaf, row, hasFocus);
                    JLabel label = (JLabel) c;
                    if (value == FRIEND_ROOT) {
                        label.setIcon(ImageShop.USER_ROOT_IMAGEICON);
                    } else {
                        label.setIcon(ImageShop.USER_IMAGEICON);
                    }
                    return c;
                }
            };
            friendTree.setCellRenderer(renderer2);
        }
        /**
         * 实现TreeSelectionListener接口的方法
         *
         * @param event TreeSelectionEvent对象
         */
        public void valueChanged(TreeSelectionEvent event) {
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) event
                .getPath().getLastPathComponent();
            if (node == FRIEND_ROOT) {
                userInfoPanel.setValue(null);
            } else {
                UserInfo info = (UserInfo) node.getUserObject();
                userInfoPanel.setValue(info);
            }
        }
    }
}