optionsmenu.java

来自「GPS Track connects to a GPS and records 」· Java 代码 · 共 47 行

// J2ME GPS Track
// Copyright (C) 2006 Dana Peters
// http://www.qcontinuum.org/gpstrack

package org.qcontinuum.gpstrack;

import javax.microedition.lcdui.*;

public class OptionsMenu extends List implements CommandListener {

    private Displayable mParent;
    private Command mBackCommand;
    private static final String mOptionStrings[] = {
        "Track",
        "Units",
        "Backlight"
    };

    public OptionsMenu(Displayable parent) {
        super("Options", List.IMPLICIT, mOptionStrings, null);
        mParent = parent;
        addCommand(mBackCommand = new Command("Back", Command.BACK, 0));
        setCommandListener(this);
    }

    public void commandAction(Command c, Displayable d)  {
        if (c == List.SELECT_COMMAND) {
            switch (getSelectedIndex()) {
                case 0:
                    GpsTrack.display(new OptionsTrack(this));
                    break;
                case 1:
                    GpsTrack.display(new OptionsUnits(this));
                    break;
                case 2:
                    if (GpsTrack.midp2Capable())
                        GpsTrack.display(new OptionsBacklight(this));
                    else
                        GpsTrack.display("Backlight options are only available on devices with MIDP 2.", mParent);
                    break;
            }
        } else if (c == mBackCommand) {
            GpsTrack.display(mParent);
        }
    }
}