menulist.java

来自「J2ME MIDP_Example_Applications」· Java 代码 · 共 114 行

// Copyright 2003 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.


// unnamed package

import javax.microedition.lcdui.*;


class MenuList
    extends List
    implements CommandListener
{
    private HawkMIDlet midlet;
    private Command exitCommand;
    private boolean gameActive = false;


    MenuList(HawkMIDlet midlet)
    {
        super("Hawk", List.IMPLICIT);
        this.midlet = midlet;

        append("New game", null);
        append("Instructions", null);

        exitCommand = new Command("Exit", Command.EXIT, 1);
        addCommand(exitCommand);
        
        setCommandListener(this);
    }


    void setGameActive(boolean active)
    {
        if (active && !gameActive)
        {
            gameActive = true;
            insert(0, "Continue", null);
        }
        else if (!active && gameActive)
        {
            gameActive = false;
            delete(0);
        }
    }


    public void commandAction(Command c, Displayable d)
    {
        if (c == List.SELECT_COMMAND)
        {
            int index = getSelectedIndex();
            if (index != -1)  // should never be -1
            {
                if (!gameActive)
                {
                    index++;
                }
                switch (index)
                {
                case 0:   // Continue
                    midlet.menuListContinue();
                    break;
                case 1:   // New game
                    midlet.menuListNewGame();
                    break;
                case 2:   // Instructions
                    midlet.menuListInstructions();
                    break;
                default:
                    // can't happen
                    break;
                }
            }
        }
        else if (c == exitCommand)
        {
            midlet.menuListQuit();
        }
    }
}