Java tutorial
package org.lnicholls.galleon.apps.internetSlideshows; /* * Copyright (C) 2005 Leon Nicholls * * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later * version. * * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * See the file "COPYING" for more details. */ import java.awt.Color; import java.awt.image.*; import java.awt.*; import java.io.ByteArrayInputStream; import java.io.File; import java.io.FileInputStream; import java.io.StringReader; import java.net.URL; import java.text.ParsePosition; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Arrays; import java.util.Date; import java.util.Iterator; import java.util.List; import java.util.Random; import java.util.StringTokenizer; import java.util.Vector; import javax.imageio.ImageIO; import net.sf.hibernate.HibernateException; import net.sf.hibernate.Query; import net.sf.hibernate.ScrollableResults; import net.sf.hibernate.Session; import net.sf.hibernate.Transaction; import org.apache.commons.lang.StringUtils; import org.apache.log4j.Logger; import org.dom4j.Document; import org.dom4j.Element; import org.dom4j.io.SAXReader; import org.lnicholls.galleon.app.AppContext; import org.lnicholls.galleon.app.AppFactory; import org.lnicholls.galleon.apps.internetSlideshows.InternetSlideshowsOptionsPanel.ImagesWrapper; import org.lnicholls.galleon.database.Audio; import org.lnicholls.galleon.database.AudioManager; import org.lnicholls.galleon.database.HibernateUtil; import org.lnicholls.galleon.database.PersistentValue; import org.lnicholls.galleon.database.PersistentValueManager; import org.lnicholls.galleon.database.Podcast; import org.lnicholls.galleon.database.PodcastTrack; import org.lnicholls.galleon.media.ImageManipulator; import org.lnicholls.galleon.media.JpgFile; import org.lnicholls.galleon.media.MediaManager; import org.lnicholls.galleon.media.Mp3File; import org.lnicholls.galleon.server.MusicPlayerConfiguration; import org.lnicholls.galleon.server.Server; import org.lnicholls.galleon.util.Effect; import org.lnicholls.galleon.util.Effects; import org.lnicholls.galleon.util.FileFilters; import org.lnicholls.galleon.util.FileSystemContainer; import org.lnicholls.galleon.util.NameValue; import org.lnicholls.galleon.util.Tools; import org.lnicholls.galleon.util.FileSystemContainer.FileItem; import org.lnicholls.galleon.util.FileSystemContainer.FolderItem; import org.lnicholls.galleon.util.FileSystemContainer.Item; import org.lnicholls.galleon.widget.DefaultApplication; import org.lnicholls.galleon.widget.DefaultMenuScreen; import org.lnicholls.galleon.widget.DefaultOptionList; import org.lnicholls.galleon.widget.DefaultOptionsScreen; import org.lnicholls.galleon.widget.DefaultScreen; import org.lnicholls.galleon.widget.Grid; import org.lnicholls.galleon.widget.LabelText; import org.lnicholls.galleon.widget.MusicOptionsScreen; import org.lnicholls.galleon.widget.OptionsButton; import org.lnicholls.galleon.widget.DefaultApplication.Tracker; import org.lnicholls.galleon.widget.DefaultApplication.VersionScreen; import com.tivo.hme.bananas.BEvent; import com.tivo.hme.bananas.BHighlights; import com.tivo.hme.bananas.BList; import com.tivo.hme.bananas.BText; import com.tivo.hme.bananas.BView; import com.tivo.hme.sdk.Resource; import com.tivo.hme.sdk.View; import com.tivo.hme.interfaces.IContext; import com.tivo.hme.interfaces.IArgumentList; import de.nava.informa.core.ChannelBuilderIF; import de.nava.informa.core.ChannelIF; import de.nava.informa.core.ItemIF; import de.nava.informa.impl.basic.ChannelBuilder; import de.nava.informa.parsers.FeedParser; public class InternetSlideshows extends DefaultApplication { private static Logger log = Logger.getLogger(InternetSlideshows.class.getName()); private final static Runtime runtime = Runtime.getRuntime(); public final static String TITLE = "Internet Slideshows"; private Resource mMenuBackground; private Resource mInfoBackground; private Resource mFolderIcon; private Resource mLargeFolderIcon; private Resource mCameraIcon; public void init(IContext context) throws Exception { super.init(context); mMenuBackground = getSkinImage("menu", "background"); mInfoBackground = getSkinImage("info", "background"); mFolderIcon = getSkinImage("menu", "folder"); mLargeFolderIcon = getSkinImage("menu", "gridFolder"); mCameraIcon = getSkinImage("menu", "item"); InternetSlideshowsConfiguration imagesConfiguration = (InternetSlideshowsConfiguration) ((InternetSlideshowsFactory) getFactory()) .getAppContext().getConfiguration(); PersistentValue persistentValue = PersistentValueManager.loadPersistentValue(DefaultApplication.TRACKER); if (persistentValue != null) { List files = new ArrayList(); StringTokenizer tokenizer = new StringTokenizer(persistentValue.getValue(), DefaultApplication.SEPARATOR); while (tokenizer.hasMoreTokens()) { String id = tokenizer.nextToken(); Audio audio = AudioManager.retrieveAudio(new Integer(id)); if (audio != null) { files.add(new FileItem(audio.getTitle(), new File(audio.getPath()))); } } Tracker tracker = new Tracker(files, 0); //tracker.setRandom(imagesConfiguration.isRandomPlayFolders()); setTracker(tracker); } push(new PhotosMenuScreen(this), TRANSITION_NONE); initialize(); } public class OptionsScreen extends DefaultOptionsScreen { public OptionsScreen(DefaultApplication app) { super(app); getBelow().setResource(mInfoBackground); InternetSlideshowsConfiguration imagesConfiguration = (InternetSlideshowsConfiguration) ((InternetSlideshowsFactory) getFactory()) .getAppContext().getConfiguration(); int start = TOP; int width = 270; int increment = 37; int height = 25; BText text = new BText(getNormal(), BORDER_LEFT, start, BODY_WIDTH, 30); text.setFlags(RSRC_HALIGN_LEFT | RSRC_TEXT_WRAP | RSRC_VALIGN_CENTER); text.setFont("default-24-bold.font"); text.setShadow(true); text.setValue("Use safe viewing area"); NameValue[] nameValues = new NameValue[] { new NameValue("Yes", "true"), new NameValue("No", "false") }; mUseSafeButton = new OptionsButton(getNormal(), BORDER_LEFT + BODY_WIDTH - width, start, width, height, true, nameValues, String.valueOf(imagesConfiguration.isUseSafe())); setFocusDefault(mUseSafeButton); start = start + increment; text = new BText(getNormal(), BORDER_LEFT, start, BODY_WIDTH, 30); text.setFlags(RSRC_HALIGN_LEFT | RSRC_TEXT_WRAP | RSRC_VALIGN_CENTER); text.setFont("default-24-bold.font"); text.setShadow(true); text.setValue("Slideshow Effects"); String names[] = new String[0]; names = (String[]) Effects.getEffectNames().toArray(names); Arrays.sort(names); List nameValuesList = new ArrayList(); for (int i = 0; i < names.length; i++) { String name = names[i]; nameValuesList.add(new NameValue(name, name)); } nameValuesList.add(new NameValue(Effects.RANDOM, Effects.RANDOM)); nameValuesList.add(new NameValue(Effects.SEQUENTIAL, Effects.SEQUENTIAL)); nameValues = (NameValue[]) nameValuesList.toArray(new NameValue[0]); mEffectButton = new OptionsButton(getNormal(), BORDER_LEFT + BODY_WIDTH - width, start, width, height, true, nameValues, imagesConfiguration.getEffect()); start = start + increment; text = new BText(getNormal(), BORDER_LEFT, start, BODY_WIDTH, 30); text.setFlags(RSRC_HALIGN_LEFT | RSRC_TEXT_WRAP | RSRC_VALIGN_CENTER); text.setFont("default-24-bold.font"); text.setShadow(true); text.setValue("Display Time"); nameValues = new NameValue[] { new NameValue("2 seconds", "2"), new NameValue("3 seconds", "3"), new NameValue("4 seconds", "4"), new NameValue("5 seconds", "5"), new NameValue("6 seconds", "6"), new NameValue("7 seconds", "7"), new NameValue("8 seconds", "8"), new NameValue("9 seconds", "9"), new NameValue("10 seconds", "10"), new NameValue("11 seconds", "11"), new NameValue("12 seconds", "12"), new NameValue("13 seconds", "13"), new NameValue("14 seconds", "14"), new NameValue("15 seconds", "15"), new NameValue("16 seconds", "16"), new NameValue("17 seconds", "17"), new NameValue("18 seconds", "18"), new NameValue("19 seconds", "19"), new NameValue("20 seconds", "20") }; mDisplayTimeButton = new OptionsButton(getNormal(), BORDER_LEFT + BODY_WIDTH - width, start, width, height, true, nameValues, String.valueOf(imagesConfiguration.getDisplayTime())); start = start + increment; text = new BText(getNormal(), BORDER_LEFT, start, BODY_WIDTH, 30); text.setFlags(RSRC_HALIGN_LEFT | RSRC_TEXT_WRAP | RSRC_VALIGN_CENTER); text.setFont("default-24-bold.font"); text.setShadow(true); text.setValue("Transition Time"); mTransitionTimeButton = new OptionsButton(getNormal(), BORDER_LEFT + BODY_WIDTH - width, start, width, height, true, nameValues, String.valueOf(imagesConfiguration.getTransitionTime())); } public boolean handleEnter(java.lang.Object arg, boolean isReturn) { getBelow().setResource(mInfoBackground); return super.handleEnter(arg, isReturn); } public boolean handleExit() { try { DefaultApplication application = (DefaultApplication) getApp(); if (!application.isDemoMode()) { InternetSlideshowsConfiguration imagesConfiguration = (InternetSlideshowsConfiguration) ((InternetSlideshowsFactory) getFactory()) .getAppContext().getConfiguration(); imagesConfiguration.setUseSafe(Boolean.valueOf(mUseSafeButton.getValue()).booleanValue()); imagesConfiguration.setEffect(mEffectButton.getValue()); imagesConfiguration.setDisplayTime(Integer.parseInt(mDisplayTimeButton.getValue())); imagesConfiguration.setTransitionTime(Integer.parseInt(mTransitionTimeButton.getValue())); Server.getServer().updateApp(((InternetSlideshowsFactory) getFactory()).getAppContext()); } } catch (Exception ex) { Tools.logException(MusicOptionsScreen.class, ex, "Could not configure music player"); } return super.handleExit(); } private OptionsButton mUseSafeButton; private OptionsButton mEffectButton; private OptionsButton mDisplayTimeButton; private OptionsButton mTransitionTimeButton; } public class PhotosMenuScreen extends DefaultMenuScreen { public PhotosMenuScreen(InternetSlideshows app) { super(app, "Internet Slideshows"); getBelow().setResource(mMenuBackground); setFooter("Press ENTER for options"); InternetSlideshowsConfiguration imagesConfiguration = (InternetSlideshowsConfiguration) ((InternetSlideshowsFactory) getFactory()) .getAppContext().getConfiguration(); List list = imagesConfiguration.getPaths(); Iterator iterator = list.iterator(); while (iterator.hasNext()) { NameValue nameValue = (NameValue) iterator.next(); mMenuList.add(nameValue); } } public boolean handleAction(BView view, Object action) { if (action.equals("push") || action.equals("play")) { load(); new Thread() { public void run() { try { NameValue nameValue = (NameValue) (mMenuList.get(mMenuList.getFocus())); List stories = getPhotoDescriptions(nameValue.getValue()); Tracker tracker = new Tracker(stories, 0); InternetSlideshowsConfiguration imagesConfiguration = (InternetSlideshowsConfiguration) ((InternetSlideshowsFactory) getFactory()) .getAppContext().getConfiguration(); getBApp().push(new SlideshowScreen((InternetSlideshows) getBApp(), tracker), TRANSITION_LEFT); getBApp().flush(); } catch (Exception ex) { Tools.logException(InternetSlideshows.class, ex); } } }.start(); return true; } return super.handleAction(view, action); } protected void createRow(BView parent, int index) { BView icon = new BView(parent, 9, 2, 32, 32); NameValue nameValue = (NameValue) mMenuList.get(index); icon.setResource(mFolderIcon); BText name = new BText(parent, 50, 4, parent.getWidth() - 40, parent.getHeight() - 4); name.setShadow(true); name.setFlags(RSRC_HALIGN_LEFT); name.setValue(Tools.trim(nameValue.getName(), 40)); } public boolean handleKeyPress(int code, long rawcode) { switch (code) { case KEY_PLAY: postEvent(new BEvent.Action(this, "play")); return true; case KEY_ENTER: getBApp().push(new OptionsScreen((InternetSlideshows) getBApp()), TRANSITION_LEFT); } return super.handleKeyPress(code, rawcode); } } public class SlideshowScreen extends DefaultScreen { public SlideshowScreen(InternetSlideshows app, Tracker tracker) { this(app, tracker, true); if (!mShowDescription) setFooter("Press INFO for details", mAnim); } public SlideshowScreen(InternetSlideshows app, Tracker tracker, boolean showSlideshow) { super(app, null, null, false); mTracker = tracker; mShowSlideshow = showSlideshow; setTitle(" "); InternetSlideshowsConfiguration imagesConfiguration = (InternetSlideshowsConfiguration) ((InternetSlideshowsFactory) getFactory()) .getAppContext().getConfiguration(); if (imagesConfiguration.isUseSafe()) mPhoto = new View(getBelow(), SAFE_ACTION_H, SAFE_ACTION_V, getWidth() - 2 * SAFE_ACTION_H, getHeight() - 2 * SAFE_ACTION_V); else mPhoto = new View(getBelow(), 0, 0, getWidth(), getHeight()); } private void updateView() { try { setPainting(false); // clearImage(); updateHints(); new Thread() { public void run() { try { BufferedImage photo = currentImage(); BufferedImage scaled = ImageManipulator.getScaledImage(photo, mPhoto.getWidth(), mPhoto.getHeight()); if (scaled != null) { mPhoto.setResource(createImage(scaled), RSRC_IMAGE_BESTFIT); mPhoto.setVisible(true); // mPhoto.setTransparency(1); // mPhoto.setTransparency(0, mAnim); getBApp().flush(); scaled.flush(); scaled = null; } } catch (Throwable ex) { Tools.logException(InternetSlideshows.class, ex, "Could not retrieve image"); } } }.start(); } finally { setPainting(true); } showDescription(); } public boolean handleEnter(java.lang.Object arg, boolean isReturn) { updateView(); if (mShowSlideshow) { mSlideshow = new Slideshow(this); mSlideshow.start(); } return super.handleEnter(arg, isReturn); } private void clearImage() { Image image = currentImage(); if (image != null) { mPhoto.setVisible(false); if (mPhoto.getResource() != null) { mPhoto.getResource().flush(); mPhoto.getResource().remove(); } getBApp().flush(); } } public boolean handleExit() { try { setPainting(false); clearImage(); if (mSlideshow != null && mSlideshow.isAlive()) { mSlideshow.interrupt(); mSlideshow = null; } } finally { setPainting(true); } return super.handleExit(); } public boolean handleKeyPress(int code, long rawcode) { switch (code) { case KEY_UP: code = KEY_CHANNELUP; getApp().handleKeyPress(code, rawcode); return true; case KEY_DOWN: code = KEY_CHANNELDOWN; getApp().handleKeyPress(code, rawcode); return true; case KEY_CHANNELUP: getBApp().play("pageup.snd"); getBApp().flush(); getPrevPos(); updateView(); return true; case KEY_CHANNELDOWN: getBApp().play("pagedown.snd"); getBApp().flush(); getNextPos(); updateView(); return true; case KEY_SELECT: case KEY_RIGHT: postEvent(new BEvent.Action(this, "pop")); return true; case KEY_LEFT: postEvent(new BEvent.Action(this, "pop")); return true; case KEY_INFO: case KEY_NUM0: mShowDescription = !mShowDescription; showDescription(); return true; } return super.handleKeyPress(code, rawcode); } public void getNextPos() { if (mTracker != null && mTracker.getList().size() > 0) { int pos = mTracker.getNextPos(); } } public void getPrevPos() { if (mTracker != null && mTracker.getList().size() > 0) { int pos = mTracker.getPrevPos(); } } private BufferedImage currentImage() { if (mTracker != null && mTracker.getList().size() > 0) { try { PhotoDescription photoDescription = (PhotoDescription) mTracker.getList() .get(mTracker.getPos()); if (photoDescription != null) { return (BufferedImage) Tools.getImage(new URL(photoDescription.getUrl()), -1, -1); } } catch (Exception ex) { Tools.logException(InternetSlideshows.class, ex); } } return null; } private String currentDescription() { if (mTracker != null && mTracker.getList().size() > 0) { try { PhotoDescription photoDescription = (PhotoDescription) mTracker.getList() .get(mTracker.getPos()); if (photoDescription != null) { return photoDescription.getDescription(); } } catch (Exception ex) { Tools.logException(InternetSlideshows.class, ex); } } return null; } public void showDescription() { if (mShowDescription) { String value = currentDescription(); if (value != null) { try { setPainting(false); if (mDescription == null) { mDescriptionBackground = new View(getNormal(), SAFE_TITLE_H, getHeight() - SAFE_TITLE_V - 60, (getWidth() - (SAFE_TITLE_H * 2)), 75); mDescriptionBackground.setResource(Color.BLUE); mDescriptionBackground.setTransparency(0.4f); mDescription = new BText(getNormal(), SAFE_TITLE_H, getHeight() - SAFE_TITLE_V - 60, (getWidth() - (SAFE_TITLE_H * 2)), 75); mDescription.setFlags(RSRC_HALIGN_CENTER | RSRC_VALIGN_TOP | RSRC_TEXT_WRAP); mDescription.setFont("default-18.font"); mDescription.setShadow(true); } if (value.length() == 0) { mDescription.setVisible(false); mDescriptionBackground.setVisible(false); } else { mDescription.setValue(value); mDescription.setVisible(true); mDescriptionBackground.setVisible(true); } } finally { setPainting(true); } } } else { if (mDescription != null) { mDescription.setVisible(false); mDescriptionBackground.setVisible(false); } } } private Resource mAnim = getResource("*5000"); private BText mDescription; private View mDescriptionBackground; Image mImage; View mPhoto; Slideshow mSlideshow; // when did the last key press occur long lastKeyPress; private Tracker mTracker; private boolean mShowSlideshow; } private class Slideshow extends Thread { public Slideshow(SlideshowScreen slideshowScreen) { mSlideshowScreen = slideshowScreen; ((DefaultApplication) getApp()).setHandleTimeout(true); } public void run() { final InternetSlideshowsConfiguration photosConfiguration = (InternetSlideshowsConfiguration) ((InternetSlideshowsFactory) getFactory()) .getAppContext().getConfiguration(); Effect[] effects = new Effect[0]; if (photosConfiguration.getEffect().equals(Effects.RANDOM) || photosConfiguration.getEffect().equals(Effects.SEQUENTIAL)) { String names[] = new String[0]; names = (String[]) Effects.getEffectNames().toArray(names); Arrays.sort(names); effects = new Effect[names.length]; for (int i = 0; i < names.length; i++) { String name = names[i]; effects[i] = Effects.getEffect(name); } } else { ArrayList list = new ArrayList(); list.add(Effects.getEffect(photosConfiguration.getEffect())); effects = (Effect[]) list.toArray(effects); } BufferedImage photo = null; FileInputStream is = null; Image image = null; Random random = new Random(); int currentEffect = 0; if (photosConfiguration.getEffect().equals(Effects.SEQUENTIAL)) currentEffect = 0; else if (photosConfiguration.getEffect().equals(Effects.RANDOM)) { currentEffect = random.nextInt(effects.length); } while (getApp().getContext() != null) { try { sleep(1000 * photosConfiguration.getDisplayTime()); mSlideshowScreen.getNextPos(); try { photo = mSlideshowScreen.currentImage(); String description = mSlideshowScreen.currentDescription(); if (photo != null) { long startTime = System.currentTimeMillis(); photo = (BufferedImage) Tools.getImage(photo); long estimatedTime = System.currentTimeMillis() - startTime; mSlideshowScreen.showDescription(); BufferedImage scaled = ImageManipulator.getScaledImage(photo, mSlideshowScreen.mPhoto.getWidth(), mSlideshowScreen.mPhoto.getHeight()); photo.flush(); photo = null; estimatedTime = System.currentTimeMillis() - startTime; if (photosConfiguration.getEffect().equals(Effects.SEQUENTIAL)) currentEffect = (currentEffect + 1) % effects.length; else if (photosConfiguration.getEffect().equals(Effects.RANDOM)) { currentEffect = random.nextInt(effects.length); } Effect effect = (Effect) effects[currentEffect]; effect.setDelay(photosConfiguration.getTransitionTime() * 1000); effect.apply(mSlideshowScreen.mPhoto, scaled); } } catch (Exception ex) { Tools.logException(InternetSlideshows.class, ex, "Could not retrieve image"); if (getApp().getContext() == null) return; } } catch (InterruptedException ex) { return; } catch (OutOfMemoryError ex) { System.gc(); } catch (Exception ex2) { Tools.logException(InternetSlideshows.class, ex2); } } } public void interrupt() { synchronized (this) { super.interrupt(); } ((DefaultApplication) getApp()).setHandleTimeout(false); } private SlideshowScreen mSlideshowScreen; } static class PhotoDescription { public PhotoDescription(String url, String description) { mUrl = url; mDescription = description; } public String getUrl() { return mUrl; } public String getDescription() { return mDescription; } private String mUrl; private String mDescription; } public static List getPhotoDescriptions(String url) { List photoDescriptions = new ArrayList(); PersistentValue persistentValue = PersistentValueManager .loadPersistentValue(InternetSlideshows.class.getName() + "." + url); String content = persistentValue == null ? null : persistentValue.getValue(); if (PersistentValueManager.isAged(persistentValue)) { try { String page = Tools.getPage(new URL(url)); if (page != null && page.length() > 0) content = page; } catch (Exception ex) { Tools.logException(InternetSlideshows.class, ex, "Could not cache listing: " + url); } } if (content != null) { try { SAXReader saxReader = new SAXReader(); StringReader stringReader = new StringReader(content); // Document document = saxReader.read(new // File("d:/galleon/itunes2.rss.xml")); Document document = saxReader.read(stringReader); stringReader.close(); stringReader = null; Element root = document.getRootElement(); // check for errors if (root != null && root.getName().equals("rss")) { Element channel = root.element("channel"); if (channel != null) { for (Iterator i = channel.elementIterator("item"); i.hasNext();) { Element item = (Element) i.next(); String value = null; String title = null; String link = null; if ((value = Tools.getAttribute(item, "title")) != null) { title = value; } if ((value = Tools.getAttribute(item, "description")) != null) { title = Tools.cleanHTML(value); } Element contentElement = item.element("content"); if (contentElement != null) { if ((value = contentElement.attributeValue("url")) != null) { link = value; if (url.startsWith("http://rss.news.yahoo.com")) { URL location = new URL(link); photoDescriptions.add(new PhotoDescription(location.getProtocol() + "://" + location.getHost() + location.getPath(), title)); } else photoDescriptions.add(new PhotoDescription(link, title)); } } Element enclosureElement = item.element("enclosure"); if (enclosureElement != null) { if ((value = enclosureElement.attributeValue("url")) != null) { link = value; if (url.startsWith("http://rss.news.yahoo.com")) { URL location = new URL(link); photoDescriptions.add(new PhotoDescription(location.getProtocol() + "://" + location.getHost() + location.getPath(), title)); } else photoDescriptions.add(new PhotoDescription(link, title)); } } } } } document.clearContent(); document = null; if (PersistentValueManager.isAged(persistentValue)) { PersistentValueManager.savePersistentValue(InternetSlideshows.class.getName() + "." + url, content, 60); } } catch (Exception ex) { Tools.logException(InternetSlideshows.class, ex, "Could not download listing: " + url); return null; } } return photoDescriptions; } public static class InternetSlideshowsFactory extends AppFactory { public void initialize() { InternetSlideshowsConfiguration imagesConfiguration = (InternetSlideshowsConfiguration) getAppContext() .getConfiguration(); } } private boolean mShowDescription; }