AMMSMIDlet.java

/*
 * Copyright © 2011 Nokia Corporation. All rights reserved.
 * Nokia and Nokia Connecting People are registered trademarks of Nokia Corporation. 
 * Oracle and Java are trademarks or registered trademarks of Oracle and/or its
 * affiliates. Other product and company names mentioned herein may be trademarks
 * or trade names of their respective owners. 
 * See LICENSE.TXT for license information.
 */
package com.nokia.midp.examples.jsr234.mansion;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

/**
 * AMMSMIDlet class.
 *
 */
public class AMMSMIDlet extends MIDlet implements CommandListener {

    Display display;
    MansionCanvas canvas;
    private Command exitCommand = new Command("Exit", Command.EXIT, 1);
    private Command backCommand = new Command("Back", Command.SCREEN, 1);
    private Command helpCommand = new Command("Help", Command.HELP, 1);
    private Form helpScreen;

    /*
     * Create the canvas
     */
    public AMMSMIDlet() {
        display = Display.getDisplay(this);
        canvas = new MansionCanvas(display);
        canvas.addCommand(exitCommand);
        canvas.addCommand(helpCommand);
        canvas.setCommandListener(this);
    }

    public void startApp() throws MIDletStateChangeException {
        canvas.start();
    }

    public void pauseApp() {
        canvas.pause();
    }

    public void destroyApp(boolean unconditional) throws MIDletStateChangeException {
        canvas.destroy();
    }

    /*
     * Respond to a command issued on the Canvas.
     */
    public void commandAction(Command c, Displayable s) {
        if (c == backCommand) {
            canvas.start();
        } else if (c == helpCommand) {
            canvas.pause();
            showHelp();
        } else if (c == exitCommand) {
            try {
                destroyApp(false);
                notifyDestroyed();
            } catch (MIDletStateChangeException ex) {
            }
        }
    }

    /*
     * Put up the help screen. Create it if necessary.
     * Add only the Resume command.
     */
    void showHelp() {
        if (helpScreen == null) {
            helpScreen = new Form("Walking Help");
            helpScreen.append("^ = walk forward\n");
            helpScreen.append("v = walk backwards\n");
            helpScreen.append("< = turn left\n");
            helpScreen.append("> = turn right\n");
            helpScreen.append("fire = change reverb manually\n");
        }
        helpScreen.addCommand(backCommand);
        helpScreen.setCommandListener(this);
        display.setCurrent(helpScreen);
    }
}