textreader.java

JAVA手机的电子书编辑器以及阅读器

/*
 * Created on 2004-10-21
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package com.zmc.ebook.reader;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Vector;

import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.ChoiceGroup;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Gauge;
import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.ItemStateListener;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.Screen;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.rms.InvalidRecordIDException;
import javax.microedition.rms.RecordStore;
import javax.microedition.rms.RecordStoreException;

/**
 * TextReader <br>
 * Copyright (c) 2000, 2004 e-Channels Corporation <br>
 * <br>
 * Created on 2004-10-21 <br>
 * 
 * @author ZHONGMC <br>
 *         <br>
 *         Last modified on 2004-10-21 <br>
 *         Last modified by ZHONGMC <br>
 * 
 * <p>
 * Comment here
 * </p>
 *  
 */
public class TextReader extends MIDlet implements CommandListener, ItemStateListener, Runnable
{

    /** The Command object for the About command */
    private Command aboutCommand;

    /** The Command object for the Exit command */
    private Command exitCommand;

    /** The Command object for the Ok command */
    private Command okCommand;

    /** The Command object for the Options command */
    private Command optionsCommand;

    /** The Command object for the Back command */
    private Command backCommand;

    /** The Command object for the Cancel command */
    private Command cancelCommand;

    /** The Form object for the Progress form */
    private Form progressForm;

    /** The Gauge object for the Progress gauge */
    private Gauge progressGauge;

    /** The Form object for the Options command */
    private Form optionsForm;

    /** Set of choices for the border styles */
    private ChoiceGroup forColorChoice;

    /** Set of choices for the speeds */
    private ChoiceGroup backColorChoice;

    /** The current display for this MIDlet */
    private Display display;

    /** The PhotoFrame that displays images */
    private ReaderFrame frame;

    /** The Alert for messages */
    private Alert alert;

    /** Contains Strings with the file names */
    private Vector fileNames;

    /** List of Image titles for user to select */
    private List chapterList;

    /** Name of current image, may be null */
    private String fileName;

    /** Current thread loading images, may be null */
    private Thread thread;

    /** Name of persistent storage */
    private final String optionsName = "PhotoAlbum";

    /** Persistent storage for options */
    private RecordStore optionsStore;

    private boolean firstTime = true;

    private int curChapter = 0;

    private int curPagraph = 0;

    public TextReader()
    {
        display = Display.getDisplay(this);

        exitCommand = new Command("Exit", Command.EXIT, 1);
        optionsCommand = new Command("选项", Command.SCREEN, 1);
        okCommand = new Command("确认", Command.OK, 3);
        backCommand = new Command("返回", Command.BACK, 3);
        cancelCommand = new Command("取消", Command.CANCEL, 1);
        aboutCommand = new Command("About", Command.HELP, 30);

        frame = new ReaderFrame();
        //        frame.setStyle(2);
        //        frame.setSpeed(2);
        frame.addCommand(optionsCommand);
        frame.addCommand(backCommand);
        frame.setCommandListener(this);
        alert = new Alert("Warning");
        setupChapterList();
        firstTime = true;

    }

    /**
     * Check the attributes in the descriptor that identify chapter files and
     * titles and initialize the lists of file and imageList.
     * <P>
     * The attributes are named "Chapter-n" and "ChapterTitle-n". The value "n"
     * must start at "1" and increment by 1.
     */
    private void setupChapterList()
    {
        fileNames = new Vector();
        chapterList = new List("chapters", List.IMPLICIT);
        chapterList.addCommand(exitCommand);
        chapterList.addCommand(aboutCommand);
        chapterList.setCommandListener(this);

        for (int n = 1; n < 20; n++)
        {
            String nthChapter = "Chapter-" + n;
            String file = getAppProperty(nthChapter);
            if (file == null || file.length() == 0)
                break;

            String nthTitle = "ChapterTitle-" + n;
            String title = getAppProperty(nthTitle);
            if (title == null || title.length() == 0)
                title = file;

            fileNames.addElement(file.trim());
            chapterList.append(title, null);
        }
        
        System.out.println("Set to curChapter:" + curChapter);
        chapterList.setSelectedIndex(curChapter, true);
    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.microedition.midlet.MIDlet#startApp()
     */
    protected void startApp() throws MIDletStateChangeException
    {
        if (firstTime)
        {
            if (chapterList.size() > 0)
            {
                display.setCurrent(chapterList);
                openOptions();
                restoreOptions();
            }
            else
            {
                alert.setString("No chapters configured.");
                display.setCurrent(alert, chapterList);
            }
            firstTime = false;
        }

        openOptions();
        restoreOptions();

    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.microedition.midlet.MIDlet#pauseApp()
     */
    protected void pauseApp()
    {
        saveOptions();

    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.microedition.midlet.MIDlet#destroyApp(boolean)
     */
    protected void destroyApp(boolean arg0) throws MIDletStateChangeException
    {
        saveOptions();
        closeOptions();
        frame.reset(); // Discard images cached in the frame.

    }

    /*
     * (non-Javadoc)
     * 
     * @see javax.microedition.lcdui.CommandListener#commandAction(javax.microedition.lcdui.Command,
     *      javax.microedition.lcdui.Displayable)
     */
    public void commandAction(Command c, Displayable s)
    {
        if (c == exitCommand)
        {
            // Cleanup and notify that the MIDlet has exited
            try
            {
                destroyApp(false);
                notifyDestroyed();
            } catch (Exception e)
            {

            }
        }
        else if (c == optionsCommand)
        {
            // Display the options form
            display.setCurrent(genOptions());
        }
        else if (c == okCommand && s == optionsForm)
        {
            // Return to the PhotoFrame, the option values have already
            // been saved by the item state listener
            display.setCurrent(frame);
        }
        else if (c == List.SELECT_COMMAND)
        {
            // Display the progress screen and
            // start the thread to read the images
            int i = chapterList.getSelectedIndex();
            fileName = (String) fileNames.elementAt(i);
            display.setCurrent(genProgress(chapterList.getString(i)));
            thread = new Thread(this);
            thread.start();
        }
        else if (c == backCommand)
        {
            // Display the list of chapters.
            display.setCurrent(chapterList);
        }
        else if (c == cancelCommand)
        {
            // Signal thread to stop and put an alert.
            thread = null;
            alert.setString("Loading File cancelled.");
            display.setCurrent(alert, chapterList);
        }
        else if (c == aboutCommand)
        {
            About.showAbout(display);
        }

    }