community.java

j2me编写的一个在线游戏

        // Interpreted as an action, instead of an actual
        //  view, like requests for Community.BACK.
        // Like BACK, but potentially jumps back two views
        // down the view stack instead of just one.  First
        // BACK returns from the "Really exit?" or "Game
        // Over" dialog to the maze game, second BACK returns
        // from the maze game to whatever screen the user was
        // on before they started.
        else if (name.equals(MAZEEXIT)) {
        	mazeRacer.gameOver( false);
        	view = getView(BACK);
        	// Only jump back two views if the view we were
        	// on when a MAZEEXIT dialog popped up was the
        	// MazeRacer game itself.  (This avoids edge-case
        	// problems when we accidentally receive this event
        	// after we've left the game view.)
        	if (view==mazeRacer.getView()) {
        		view = getView(BACK);
        	}
        }

        // Username/Password screen (part of new account creation)
        else if (name.equals(USER_PASS))
            view = new UserPassView  ( this, USER_PASS);

        // Email/Date-of-Birth screen (part of new account creation)
        else if (name.equals(EMAIL_DOB))
            view = new EmailDobView( this, EMAIL_DOB);

        // Terms and conditions screen (part of new account creation)
        else if (name.equals(TERMS)) {
            TextBox textBox = new TextBox();
            textBox.setText(  TermsView.TERMS_AND_CONDITIONS);
            textBox.setBackground(0x00ffffff);
            textBox.setForeground(0x00c0c0c0);
            textBox.setFocusable(false);
            textBox.setDimension(canvas.getWidth() - 10, 12 * textBox.getFont().getHeight() + TextBox.WIDTH_OFFSET);
            view = new TermsView( this, TERMS, textBox);
        }

        // "Are you sure" logout dialog
        else if (name.equals(LOGOUT)) {
        	showDialog( "Log Out", "Are you sure you want to log out?",
        			null, Community.REALLY_LOGOUT, Dialog.YES_NO
        			);
        }

        // Action, instead of a View.  Logs the user out.
        else if (name.equals(REALLY_LOGOUT)) {
            view = null;
            logout();
        }

        // "Are you sure" app exit dialog
        else if (name.equals(EXIT)) {
        	showDialog( "Exit", "Are you sure you want to exit?",
        			null, Community.REALLY_EXIT, Dialog.YES_NO
        			);
        }

        // Action, instead of a view.  Exits the MIDlet.
        else if (name.equals(REALLY_EXIT)) {
            view = null;
            exit();
        }

        // Splash screen
        else if (name.equals(SPLASH)) {
            view = new SplashView(
                this,
                SPLASH,
                null,
                SPLASH_IMG,
                WELCOME,
                3000
            );
        }

        // Message of the Day screen
        if (name.equals(MOTD)) {
        	view = motd = new TextView(
                        this,
                        MOTD,
                        null,
                        this,
                        Community.HOME,
                        Community.OK,
                        null,
                        Motd_txt,
                        true
                    );
        }

        // Offline main menu, which gives the option of going online,
        // reading help/info, or playing single-player.
        else if (name.equals(Community.WELCOME)) {
            view = new ButtonListView(
                this,
                Community.WELCOME,
                this,
                null,
                new String[] {Community.GO_ONLINE, Community.SINGLE_USER, Community.ABOUT, Community.HELP},
                Community.SELECT,
                Community.EXIT
            );
        }

        // Online main menu (play, friends, rankings, help)
        else if (name.equals(HOME)) {
            view = new ButtonListView(
                this,
                HOME,
                this,
                buddyList,
                new String[] {"play", "rankings", "friends", "help"},
                Community.SELECT,
                Community.LOGOUT
            );

        }

        // Play menu (challenge or quick match)
        else if (name.equals(PLAY)) {
            view = new ButtonListView(
                this,
                PLAY,
                this,
                buddyList,
                new String[] {"quick match", "challenge"},
                Community.SELECT,
                Community.BACK
            );
        }

        // Waiting for quickmatch or challenge to complete, dialog
        else if (name.equals(PENDING_GAMESTART)) {
            view = new TextView(
                this,
                PENDING_GAMESTART,
                buddyList,
                this,
                null,
                null,
                Community.CANCEL,
                "Press 'cancel' to abort",
                false
            );
        }

        // Rankings menu (stats vs. my rankings)
        else if (name.equals(RANKING)) {
            view = new ButtonListView(
                this,
                RANKING,
                this,
                buddyList,
                new String[] {Community.STATS, Community.MY_RANKINGS},
                Community.SELECT,
                Community.BACK
            );
        }

        else if (name.equals(TOP_10)) {
            SectionNavigator sn;

            sn = new SectionNavigator(
                SELECTED_SECTION,
                new String[] {}
            );
            sn.setFont(LoginView.TEXTFIELD_FONT);
            sn.setForeground(0x00c0c0c0);

            view = new RankingView(
                this,
                TOP_10,
                buddyList,
                sn,
                new String[] {"#", "Username", "Score"}
            );
        }

        // Stats menu (lists game rankings categories)
        else if (name.equals(STATS)) {
            view = new ButtonListView(
                this,
                STATS,
                this,
                buddyList,
                statList,
                Community.SELECT,
                Community.BACK
            );
        }

        // My rankings view
        else if (name.equals(MY_RANKINGS)) {
            SectionNavigator sn;

            sn = new SectionNavigator(
                SELECTED_SECTION,
                new String[] {}
            );
            sn.setFont(LoginView.TEXTFIELD_FONT);
            sn.setForeground(0x00c0c0c0);

            view = new RankingView(
                this,
                MY_RANKINGS,
                buddyList,
                sn,
                new String[] {"Rnk", "Stat", "Score"}
            );
        }

        // Main help menu
        else if (name.equals(HELP)) {
            view = new ButtonListView(
                this,
                Community.HELP,
                this,
                buddyList,
                new String[] {"snap mobile", "game", "operator"},
                Community.SELECT,
                Community.BACK
            );
        }

        // SNAP Mobile help screen
        else if (name.equals(SM_HELP)) {
            view = new TextView(
                this,
                SM_HELP,
                buddyList,
                this,
                null,
                null,
                Community.BACK,
                SM_Help_txt,
                true
            );
        }

        // Game help screen
        else if (name.equals(GAME_HELP)) {
            view = new TextView(
                this,
                GAME_HELP,
                buddyList,
                this,
                null,
                null,
                Community.BACK,
                Game_Help_txt,
                true
            );
        }

        // Operator help screen
        else if (name.equals(OPERATOR_HELP)) {
            view = new TextView(
                this,
                OPERATOR_HELP,
                buddyList,
                this,
                null,
                null,
                Community.BACK,
                Operator_Help_txt,
                true
            );
        }

        // About info screen
        else if (name.equals(ABOUT)) {
            view = new TextView(
                this,
                ABOUT,
                null,
                this,
                null,
                null,
                Community.BACK,
                About_txt,
                true
            );
        }

        // Login (and/or create new account) screen
        else if (name.equals(LOGIN)) {
            view = new LoginView(
                this,
                LOGIN,
                this
            );
        }

        // Chat screen
        else if (name.equals(CHAT)) {
            view = new Chat(
                this,
                CHAT,
                buddyList
            );
        }

        // Friends list screen
        else if (name.equals(FRIENDS)) {
            view = new BuddyView(
                this,
                FRIENDS,
                buddyList
                );
        }

        return view;
    }

    /**
     * Tells GUI to instantiate (if necessary) and display a
     * particular named view.  "back" and "exit" have special
     * behavior (see <code>getView</code>).
     *
     * @param name Name of View to display
     */

    public void switchToView(String name) {
//        System.out.println("Community.switchToView(), name = " + name);
        switchToView(getView(name), !name.equals(BACK));
    }

    /**
     * Tells GUI to instantiate (if necessary) and display a
     * particular named view.  "back" and "exit" have special
     * behavior (see <code>getView</code>).
     *
     * @param view View to display
     * @param cache Caching flag; if <code>false</code>, current
     *  view will not be preserved on the View stack (disabling
     *  "back" behavior for that View)
     */
    public void switchToView(View view, boolean cache) {
        View prev;

        if (view == null) {
//            System.out.println("NULL view !");
            return;
        }

        prev = canvas.getView();
        prev.setActive(false);
        view.setActive(true);
        canvas.setView(view);

        if (cache) {
            synchronized (viewList) {
                // Removes loops in the "BACK" View stack. That is, looks back
                // down the stack for the last entry of the view being added.
                // If found, remove all Views above it in the stack.
                while (viewList.contains( view)) {
                    viewList.removeElementAt( viewList.size()-1);
                }
                viewList.addElement(view);
            }
        }
    }

    /**
     * Searches for a particular named View in the View stack (cache).
     *
     * @param name Name of View to find
     * @return Returns named View, if found
     */
    public View findView(String name) {
        View view;
        int i;

        synchronized (viewList) {
            for (i=viewList.size()-1; i>=0; i--) {
                view = (View)viewList.elementAt(i);
                if (name.equals(view.getName())) return view;
            }
        }

        return null;