fruitmachinemidlet.java

利用javame开发的

// Copyright 2002 Nokia Corporation.
//
// THIS SOURCE CODE IS PROVIDED 'AS IS', WITH NO WARRANTIES WHATSOEVER,
// EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY, FITNESS
// FOR ANY PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE
// OR TRADE PRACTICE, RELATING TO THE SOURCE CODE OR ANY WARRANTY OTHERWISE
// ARISING OUT OF ANY PROPOSAL, SPECIFICATION, OR SAMPLE AND WITH NO
// OBLIGATION OF NOKIA TO PROVIDE THE LICENSEE WITH ANY MAINTENANCE OR
// SUPPORT. FURTHERMORE, NOKIA MAKES NO WARRANTY THAT EXERCISE OF THE
// RIGHTS GRANTED HEREUNDER DOES NOT INFRINGE OR MAY NOT CAUSE INFRINGEMENT
// OF ANY PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OWNED OR CONTROLLED
// BY THIRD PARTIES
//
// Furthermore, information provided in this source code is preliminary,
// and may be changed substantially prior to final release. Nokia Corporation
// retains the right to make changes to this source code at
// any time, without notice. This source code is provided for informational
// purposes only.
//
// Nokia and Nokia Connecting People are registered trademarks of Nokia
// Corporation.
// Java and all Java-based marks are trademarks or registered trademarks of
// Sun Microsystems, Inc.
// Other product and company names mentioned herein may be trademarks or
// trade names of their respective owners.
//
// A non-exclusive, non-transferable, worldwide, limited license is hereby
// granted to the Licensee to download, print, reproduce and modify the
// source code. The licensee has the right to market, sell, distribute and
// make available the source code in original or modified form only when
// incorporated into the programs developed by the Licensee. No other
// license, express or implied, by estoppel or otherwise, to any other
// intellectual property rights is granted herein.


package example.fruitmachine;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.IOException;


public class FruitMachineMIDlet
    extends MIDlet
{
    private final HttpPoster httpPoster;
    private final Image logoImage;
    private GameScreen gameScreen = null;
    private ChangeBetScreen changeBetScreen = null;
    private BuyCreditScreen buyCreditScreen = null;
    private Account account = null;


    public FruitMachineMIDlet()
    {
        String servletUrl = getAppProperty("Servlet-URL");
        httpPoster = new HttpPoster(servletUrl);

        logoImage = createImage("/logo.png");
        ErrorScreen.init(logoImage, Display.getDisplay(this));
        WinScreen.init(logoImage, Display.getDisplay(this));
    }


    public void startApp()
    {
        Displayable current = Display.getDisplay(this).getCurrent();
        if (current == null)
        {
            // first time we've been called
            Alert splashScreen = new Alert(null,  // no title
                                           "Fruit Machine\nNokia",
                                           logoImage,
                                           AlertType.INFO);
            splashScreen.setTimeout(2000);        // 2 seconds
            LoginScreen loginScreen = new LoginScreen(this, httpPoster);
            // display splash screen, then login screen
            Display.getDisplay(this).setCurrent(splashScreen, loginScreen);
        }
        else
        {
            Display.getDisplay(this).setCurrent(current);
        }
    }


    public void pauseApp()
    {
    }


    public void destroyApp(boolean unconditional)
    {
        if (gameScreen != null)
        {
            gameScreen.abort();   // kill its animation thread
        }
        httpPoster.abort(); // stop the networking thread
    }


    public void loginScreenDone(Account account)
    {
        this.account = account;
        gameScreen = new GameScreen(this,
                                    httpPoster,
                                    account,
                                    Display.getDisplay(this),
                                    createImage("/bar.png"),
                                    createImage("/bell.png"),
                                    createImage("/orange.png"),
                                    createImage("/lemon.png"),
                                    createImage("/plum.png"),
                                    createImage("/cherry.png"),
                                    createImage("/hold.png"),
                                    createImage("/hold1.png"),
                                    createImage("/hold2.png"),
                                    createImage("/hold3.png"));
        Display.getDisplay(this).setCurrent(gameScreen);
    }


    public void loginScreenQuit()
    {
        quit();
    }


    public void gameScreenChangeBet(boolean isHolding, int previousBet)
    {
        if (changeBetScreen == null)
        {
            changeBetScreen = new ChangeBetScreen(this, logoImage, account);
        }
        changeBetScreen.updateValues(isHolding, previousBet);
        Display.getDisplay(this).setCurrent(changeBetScreen);
    }


    public void gameScreenBuyCredit()
    {
        if (buyCreditScreen == null)
        {
            buyCreditScreen = new BuyCreditScreen(this,
                                                  httpPoster,
                                                  logoImage,
                                                  account);
        }
        buyCreditScreen.updateValues();
        Display.getDisplay(this).setCurrent(buyCreditScreen);
    }


    public void gameScreenQuit()
    {
        quit();
    }


    public void changeBetScreenDone()
    {
        Display.getDisplay(this).setCurrent(gameScreen);
    }


    public void buyCreditScreenDone()
    {
        Display.getDisplay(this).setCurrent(gameScreen);
    }


    /*
     * On the exit command, cleanup and notify that the MIDlet has been destroyed.
     */
    private void quit()
    {
        httpPoster.abort();  // terminate its independent thread
	destroyApp(false);
	notifyDestroyed();
    }


    private Image createImage(String filename)
    {
        Image image = null;
        try
        {
            image = Image.createImage(filename);
        }
        catch (IOException e)
        {
            // just let return value be null
        }
        return image;
    }
}