iavreadercanvas.java

anyview手机小说阅览器的开源代码

package com.ismyway.anyview;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

/**
 * <p>Title: AnyView</p>
 *
 * <p>Description: E680(I) Reader</p>
 *
 * <p>Copyright: Copyright (c) 2005</p>
 *
 * <p>Company: www.ismyway.com</p>
 *
 * @author ZhangJian
 * @version 1.0
 */
public class IAVReaderCanvas extends Canvas {
    private int ANCHOR = Graphics.LEFT | Graphics.TOP;
    private int srcW, srcH;

    //AnyView av;
    private IAVReader iav;
    private Image img;
    private byte[] data;
    private Menu menu = null;
    private boolean showMenu = false;
    private String[] items = {"关闭音乐", "跳转章节", "选择书签", "添加书签", "删除书签", "自由跳转",
                             "返回菜单", "退出程序"};
    private AbstractWindow currentWindow = null;
    private Selector selector = null;

    protected IAVReaderCanvas(String filename) {
        this.setFullScreenMode(true);
        srcW = getWidth();
        srcH = getHeight();

        iav = new IAVReader(filename);
        img = iav.getCover();
    }

    public void destroy() {
        iav.close();
        iav = null;
        img = null;
        data = null;
        System.gc();
        //System.out.println("destroy(): " + Runtime.getRuntime().freeMemory());
    }

    public void paint(Graphics g) {
        g.setColor(0);
        g.fillRect(0, 0, srcW, srcH);

        if (img != null) {
            g.drawImage(img, (srcW - img.getWidth()) >> 1,
                        (srcH - img.getHeight()) >> 1, ANCHOR);
        }

        if (showMenu) {
            if (currentWindow == null) {
                g.drawImage(menu.getWindow(), (srcW - menu.getWidth()) >> 1,
                            (srcH - menu.getHeight()) >> 1, ANCHOR);
            } else {
                g.drawImage(currentWindow.getWindow(),
                            (srcW - currentWindow.getWidth()) >> 1,
                            (srcH - currentWindow.getHeight()) >> 1, ANCHOR);
            }
        }

        //AnyView.debug(g, AnyView.usedMemory(), 10, 10, ANCHOR);
    }

    public void keyPressed(int keyCode) {
        // Left
        if (keyCode == -3) {
            if (showMenu) {
                if (currentWindow == null) { //处理菜单上的事件
                    //关闭菜单
                    showMenu = false;
                    menu = null;
                    System.gc();
                } else { //处理弹出窗口的事件
                    if (currentWindow.bof()) { //关闭弹出窗口
                        currentWindow.destroy();
                        currentWindow = null;
                    } else {
                        currentWindow.keyLeft();
                    }
                }
            } else {
                keyLeft();
            }
            repaint();
            return;
        }

        // Right
        if (keyCode == -4) {
            if (showMenu) {
                if (currentWindow == null) {
                    menu.keyFire();
                } else {
                    currentWindow.keyRight();
                }
            } else {
                keyRight();
            }

            repaint();
            return;
        }

        // Up
        if (keyCode == -1) {
            if (showMenu) {
                if (currentWindow == null) {
                    menu.keyUp();
                } else {
                    currentWindow.keyUp();
                }
            } else {
                keyUp();
            }

            repaint();
            return;
        }

        // Down
        if (keyCode == -2) {
            if (showMenu) {
                if (currentWindow == null) {
                    menu.keyDown();
                } else {
                    currentWindow.keyDown();
                }
            } else {
                keyDown();
            }

            repaint();
            return;
        }

        if (keyCode == -5) {
            if (showMenu) { //当前菜单已显示
                if (currentWindow == null) { //处理菜单事件
                    menu.keyFire();
                    switch (menu.getSelectedIndex()) {
                    case 0:
                        break;
                    case 1: //列章节
                        selector = new Selector("章节列表", iav.getChapterNames(),
                                                iav.getCurentChapterIndex());
                        currentWindow = selector;
                        break;
                    case 2:
                        break;
                    case 3:
                        break;
                    case 4:
                        break;
                    case 5:
                        break;
                    case 6:
                        destroy();
                        AnyView.av.switchSplash();
                        break;
                    case 7:
                        destroy();
                        AnyView.av.exit();
                        break;
                    }
                } else { //处理当前窗口的事件
                    currentWindow.keyFire();
                    switch (menu.getSelectedIndex()) {
                    case 0:
                        break;
                    case 1: //跳转指定章节
                        if (!iav.isValidDoc()) {
                            return;
                        }

                        //根据选择的索引跳转
                        data = null;
                        img = null;
                        data = iav.getChapter(selector.getSelectedIndex());
                        img = Image.createImage(data, 0, data.length);
                        showMenu = false;
                        currentWindow = null;
                        menu = null;
                        System.gc();
                        break;
                    case 2:
                        break;
                    case 3:
                        break;
                    case 4:
                        break;
                    case 5:
                        break;
                    case 6:
                        break;
                    case 7:
                        break;
                    }
                }
            } else {
                keyFire();
            }
            repaint();
        }
    }

    public void keyUp() {
        keyLeft();
    }

    public void keyDown() {
        keyRight();
    }

    public void keyLeft() {
        if (!iav.isValidDoc()) {
            return;
        }

        data = null;
        img = null;
        System.gc();

        data = iav.getPreChapter();
        img = Image.createImage(data, 0, data.length);
    }

    public void keyRight() {
        if (!iav.isValidDoc()) {
            return;
        }

        data = null;
        img = null;
        System.gc();

        data = iav.getNextChapter();
        img = Image.createImage(data, 0, data.length);
    }

    public void keyFire() {
        menu = null;
        System.gc();
        menu = new Menu(items);
        showMenu = true;
    }
}