community.java

j2me编写的一个在线游戏

    }

    /**
     * Removes a particular named View from the View stack.
     * @param name Name of View to remove.
     */
    public void removeView(String name) {
        synchronized (viewList) {
            View view = findView(name);
            if (view != null) viewList.removeElement(view);
        }
    }

    /**
     * Causes currently visible canvas to repaint itself.
     *
     */
    public void repaint()
    {
        getCanvas().repaint();
    }

    /**
     * Returns currently visible canvas.
     */
    public Canvas getCanvas() {
        return canvas;
    }


    /*
     * =======================================================================
     *  Dialog convenience methods
     * =======================================================================
     */


    /**
     * Shows an error dialog w/ a string message and one "OK"
     * softkey in the left corner of the screen.  "OK" just
     * goes back to the previous screen.
     *
     * @param msg text of error message to display
     */
    public void showError(String msg) {
        showError( msg, null, Dialog.ALERT);
    }

    /**
     * Shows error message passed in, in full-screen Dialog.
     *
     * @param msg The error message to be displayed
     * @param target If not <code>null</code>, error dialog will
     *   go to this View upon exiting.  Otherwise, will typically
     *   go "BACK"
     * @param type type of dialog.  See <code>Dialog<code> class.
     */
    public void showError(String msg, String target, int type)
    {
        //System.out.println("Community.showError(), msg = " + msg);
    	String name = "Error";
    	switch (type) {
    	case Dialog.ALERT:
    		name = "Alert";
    		break;
    	case Dialog.ALERT_FATAL:
    	case Dialog.ALERT_LOGOUT:
    		name = "Logout Error";
            msg += " -- You must log back in from the main menu.";
    		break;
    	}
        showDialog( name, msg, null, target, type);
    }


    /**
     * Shows message passed in, in a full-screen Dialog.
     *
     * @param title
     * @param contents Must be either a String or a Component
     * @param arg Argument passed to listener when activated via SELECT
     * @param targetView If not null, View to go to upon exiting
     * @param type Type of dialog (see Dialog class for types).
     */
    public void showDialog(String title, Object contents, Object arg, String targetView, int type) {

        String rightSoft = null;
        String leftSoft = null;

        // Contents to be displayed - must be either a String or a Component
        Component comp = null;
        // If contents is a Component (usually a text input component)
        // then display it directly.
        if (contents instanceof Component) {
        	comp = (Component)contents;
        // If contents is a String, then put the String in a TextBox and
        // display that.
        } else {
	        TextBox box = new TextBox();
	        if (contents instanceof String) {
	        	box.setText( (String)contents);
	        } else {
	        	box.setText(
	        			"Error! Unrecognized contents: " +
	        			contents.toString()
	        			);
	        }
	        box.setBackground(0x00ffffff);
	        box.setForeground(0x00c0c0c0);
	        box.setFocusable(false);
	        box.setDimension( canvas.getWidth() - 10, 12 * box.getFont().getHeight() + TextBox.WIDTH_OFFSET);
	        comp = box;
        }

        // Set left/right softkeys based on type
        switch (type) {
        case Dialog.YES_NO:
        	leftSoft = Community.YES;
            rightSoft = Community.NO;
            break;
        case Dialog.DATA_ENTRY:
        case Dialog.OK_CANCEL:
        	leftSoft = Community.OK;
        	rightSoft = Community.CANCEL;
        	break;
        // All other alerts have only "OK" on left softkey
        default:
        	leftSoft = Community.OK;
            break;
        }

        Dialog dialog = new Dialog(
            this,
            title,
            this,
            leftSoft,
            rightSoft,
            comp,
            arg,
            type,
            targetView
        );

        switchToView(dialog, true);
    }

    /*
    public void showDebug(String msg) {
        TextView view = new TextView(
                this,
                "Debug",
                null,
                this,
                Community.BACK,
                Community.OK,
                null,
                msg,
                true
        );
        switchToView( view, true );
    }
    */

/*
     * =======================================================================
     *  Event handling - managing input from various Views
     * =======================================================================
     */

    /**
     * Callback for button list views
     *
     * @param view Name of View
     * @param button Name of Button
     */
    public void buttonPressed(String view, String button) {
    	// Welcome screen (offline main menu) buttons
        if (view.equals(Community.WELCOME)) {
            if (button.equals( Community.SINGLE_USER)) {
                startGame(true);
            }

            else if (button.equals( Community.GO_ONLINE)) {
                switchToView(LOGIN);
            }
            else if (button.equals( Community.ABOUT)) {
            	switchToView( ABOUT);
            }
            else if (button.equals( Community.HELP)) {
            	switchToView( HELP);
            }
        }

        // Login screen buttons
        else if (view.equals(LOGIN)) {
        	 if (button.equals(Community.LOGIN)) {
        		 switchToView(LOGIN);
        	 }

        	 else if (button.equals(Community.CREATE_ACCOUNT)) {
        		 switchToView(CREATE_ACCOUNT);
        	 }
        }

        // Rankings screen buttons (stats vs. my rankings)
        else if (view.equals(RANKING)) {
            if (button.equals( Community.STATS)) {
                switchToView(STATS);
            }

            else if (button.equals( Community.MY_RANKINGS)) {
                switchToView(MY_RANKINGS);
            }
        }

        // Play screen buttons (challenge vs. quick match)
        else if (view.equals(PLAY)) {
            if (button.equals("quick match")) {

            	handleQuickMatch();

                View next = getView(PENDING_GAMESTART);
                next.setWaiting(true);
                switchToView(next, true);
            }

            else if (button.equals("challenge")) {
                switchToView(FRIENDS);
            }
        }

        // Help screen buttons
        else if (view.equals(HELP)) {
            if (button.equals("snap mobile")) {
                switchToView(SM_HELP);
            }

            else if (button.equals("game")) {
                switchToView(GAME_HELP);
            }

            else if (button.equals("operator")) {
                switchToView(OPERATOR_HELP);
            }
        }

        // Stats buttons
        else if (view.equals(STATS)) {
            RankingView next = (RankingView)getView(TOP_10);
            next.setName(button);
            switchToView(next, true);
        }

        // Online main menu buttons
        else if (view.equals(HOME)) {
            if (button.equals("play")) {
                switchToView(PLAY);
            }

            else if (button.equals("rankings")) {
                switchToView(RANKING);
            }

            else if (button.equals("friends")) {
                switchToView(FRIENDS);
            }

            else if (button.equals("help")) {
                switchToView(HELP);
            }
        }
    }

    /*
     * Event handler implemented from samples.ui.EventListener interface.
     *
     * @param e The event
     */
    public boolean handleEvent(Event e) {
        //System.out.println("Community.handleEvent(), source = " + e.getSource() + ", value = " + e.getValue());
        View view = (View)e.getSource();
        String action = (String)e.getValue();
        ItemList il;

        if (e.getSource() instanceof LoginView) {
        	switchToView(HOME);
            return true;
        }

        // Splash screen
        else if (e.getSource() instanceof SplashView) {
            switchToView(Community.WELCOME);
            return true;
        }

        // Pending game start screen
        else if (e.getSource() instanceof TextView) {
            if (view.getName().equals(PENDING_GAMESTART)) {
                if (action.equals(Community.CANCEL)) {
                    il = new ItemList();
                    il.setItem("cmd", "gameStartCancel");
                    il.setItem("listener", this);
                    executeCmd(il);
                    switchToView(Community.BACK);
                    return true;
                }
            }
        }

        // Dialogs
        else if (e.getSource() instanceof Dialog) {
            Dialog dialog = (Dialog)e.getSource();
            String name = dialog.getName();

            il = new ItemList();

            if (dialog.getType()==Dialog.ALERT_FATAL) {
                setLoginInfo(null, null, null, null);
                if (mazeRacer.isPlaying()) mazeRacer.gameOver(false);
                switchToView(Community.WELCOME);
                return true;
            }

            else if (dialog.getType()==Dialog.ALERT_LOGOUT) {
                if (mazeRacer.isPlaying()) mazeRacer.gameOver(false);
                logout();
                return true;
            }

            else if (name.equals("Alert") || name.equals("Error") || name.equals("Note")) {
                //System.out.println("got dialog event, switching to back");
                switchToView(Community.BACK);
                return true;
            }

            else if (name.equals("Friend Request")) {
                String from = (String)dialog.getArg();
                if (action.equals(Community.YES)) {

                    buddyList.add(new Buddy(from, Buddy.ONLINE_AVAILABLE));
                    //System.out.println("approved buddy request. from = " + from);
                    //System.out.println("buddyList.get(from) = " + buddyList.get(from));
                }

                il.setItem("cmd", action.equals(Community.YES)
                    ? "acceptBuddyRequest"
                    : "declineBuddyRequest");
                il.setItem("name", from);
                il.setItem("listener", this);

                executeCmd(il);

                switchToView(Community.BACK);
                return true;
            }

            else if (name.equals("Add Friend")) {
                if (action.equals(Community.OK)) {
                	addFriend( ((TextField)dialog.getComponent()).getText());
                    return true;
                }
            }

            else if (name.equals("Remove Friend")) {
                if (action.equals(Community.YES)) {
                    String buddy = (String)dialog.getArg();
                    il.setItem("cmd", "removeBuddy");
                    il.setItem("name", buddy);
                    il.setItem("listener", this);
                    executeCmd(il);
                    buddyList.remove(buddy);
                    switchToView( Community.BACK);
                    return true;
                }
            }

            // user wants to accept challenge
            else if (name.equals("Challenge")) {
                if (action.equals(Community.YES)) {
                	switchToView( Community.BACK);
                    handleChallenge(null, (String)dialog.getArg(), 0);
                    return true;
                }
            }