Java tutorial
/* * Copyright (c) 2015 Felix Husse under MIT License * see LICENSE file */ package de.fatalix.bookery.view.common; import com.vaadin.cdi.UIScoped; import com.vaadin.event.ShortcutAction; import com.vaadin.server.FileDownloader; import com.vaadin.server.FontAwesome; import com.vaadin.server.StreamResource; import com.vaadin.shared.ui.label.ContentMode; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.CssLayout; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Image; import com.vaadin.ui.Label; import com.vaadin.ui.Notification; import com.vaadin.ui.VerticalLayout; import com.vaadin.ui.themes.ValoTheme; import de.fatalix.bookery.solr.model.BookEntry; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import javax.annotation.PostConstruct; import javax.inject.Inject; import javax.mail.MessagingException; import org.apache.log4j.Logger; import org.apache.shiro.SecurityUtils; import org.apache.solr.client.solrj.SolrServerException; /** * * @author Fatalix */ @UIScoped public class BookDetailLayout extends CssLayout { @Inject private Logger logger; @Inject private BookDetailPresenter presenter; private BookEntry bookEntry; private FileDownloader fileDownloader; private Label titleLabel; private Image image; private Button downloadButton; private Button sendToKindleButton; private Button watchListButton; private Button likeButton; private Label downloadCount; private Label descriptionLabel; private Button cancelButton; @PostConstruct private void postInit() { addStyleName("product-form-wrapper"); addStyleName("product-form"); titleLabel = new Label("Title - Author"); titleLabel.addStyleName(ValoTheme.LABEL_COLORED); titleLabel.addStyleName(ValoTheme.LABEL_BOLD); descriptionLabel = new Label("Description", ContentMode.HTML); descriptionLabel.addStyleName(ValoTheme.LABEL_LIGHT); descriptionLabel.setValue("Keine Beschreibung vorhanden"); cancelButton = new Button("close", new Button.ClickListener() { @Override public void buttonClick(Button.ClickEvent event) { setLayoutVisible(false); } }); cancelButton.setClickShortcut(ShortcutAction.KeyCode.ESCAPE); cancelButton.addStyleName(ValoTheme.BUTTON_DANGER); VerticalLayout rootLayout = new VerticalLayout(titleLabel, createImageLayout(), descriptionLabel, cancelButton); rootLayout.setSpacing(true); addComponent(rootLayout); } private HorizontalLayout createImageLayout() { image = new Image(); image.setImmediate(true); image.setHeight("200px"); image.setWidth("130px"); downloadButton = new Button("download", FontAwesome.DOWNLOAD); downloadButton.addStyleName(ValoTheme.BUTTON_FRIENDLY); downloadButton.addClickListener(new Button.ClickListener() { @Override public void buttonClick(Button.ClickEvent event) { try { loadData(presenter.updateShared(bookEntry, SecurityUtils.getSubject().getPrincipal().toString())); } catch (SolrServerException | IOException ex) { Notification.show("Unexpected Error!\n" + ex.getMessage(), Notification.Type.ERROR_MESSAGE); logger.error(ex, ex); } } }); fileDownloader = new FileDownloader(new StreamResource(new BookStreamSource(null), "blbla.epub")); fileDownloader.extend(downloadButton); sendToKindleButton = new Button("Kindle", FontAwesome.BOOK); sendToKindleButton.addStyleName(ValoTheme.BUTTON_FRIENDLY); sendToKindleButton.addClickListener(new Button.ClickListener() { @Override public void buttonClick(Button.ClickEvent event) { try { presenter.shareBookWithKindle(bookEntry, SecurityUtils.getSubject().getPrincipal().toString()); Notification.show("Book is sent to kindle", Notification.Type.HUMANIZED_MESSAGE); loadData(presenter.updateShared(bookEntry, SecurityUtils.getSubject().getPrincipal().toString())); } catch (SolrServerException | IOException | MessagingException ex) { Notification.show("Unexpected Error!\n" + ex.getMessage(), Notification.Type.ERROR_MESSAGE); logger.error(ex, ex); } } }); likeButton = new Button("0 likes", FontAwesome.THUMBS_O_UP); likeButton.addStyleName(ValoTheme.BUTTON_LINK); likeButton.addClickListener(new Button.ClickListener() { @Override public void buttonClick(Button.ClickEvent event) { try { BookEntry updatedEntry = presenter.updateLike(bookEntry, SecurityUtils.getSubject().getPrincipal().toString()); loadData(updatedEntry); } catch (SolrServerException | IOException ex) { Notification.show("Unexpected Error!\n" + ex.getMessage(), Notification.Type.ERROR_MESSAGE); logger.error(ex, ex); } } }); watchListButton = new Button("merken", FontAwesome.STAR_O); watchListButton.addStyleName(ValoTheme.BUTTON_LINK); watchListButton.addClickListener(new Button.ClickListener() { @Override public void buttonClick(Button.ClickEvent event) { presenter.addRemoveFromWatchList(bookEntry, SecurityUtils.getSubject().getPrincipal().toString()); loadData(bookEntry); } }); downloadCount = new Label("0 downloads"); VerticalLayout rightLayout = new VerticalLayout(sendToKindleButton, downloadButton, watchListButton, likeButton, downloadCount); rightLayout.setComponentAlignment(downloadCount, Alignment.MIDDLE_CENTER); rightLayout.setSpacing(true); HorizontalLayout layout = new HorizontalLayout(image, rightLayout); layout.setSpacing(true); return layout; } public void loadData(BookEntry bookEntry) { this.bookEntry = bookEntry; titleLabel.setValue(bookEntry.getTitle() + "-" + bookEntry.getAuthor()); descriptionLabel.setValue(bookEntry.getDescription()); StreamResource.StreamSource source = new ByteStreamResource(bookEntry.getCover()); image.setSource(new StreamResource(source, bookEntry.getId() + ".png")); likeButton.setCaption(bookEntry.getLikes() + " likes"); downloadCount.setValue(bookEntry.getDownloads() + " downloads"); try { byte[] data = presenter.getEbookFile(bookEntry.getId()); fileDownloader.setFileDownloadResource(new StreamResource(new BookStreamSource(data), bookEntry.getTitle() + "-" + bookEntry.getAuthor() + ".epub")); } catch (SolrServerException ex) { logger.error(ex, ex); } if (presenter.isOnWatchList(bookEntry, SecurityUtils.getSubject().getPrincipal().toString())) { watchListButton.setCaption("vergessen"); watchListButton.setIcon(FontAwesome.STAR); } else { watchListButton.setCaption("merken"); watchListButton.setIcon(FontAwesome.STAR_O); } } public void setLayoutVisible(boolean visible) { if (visible) { addStyleName("visible"); } else { removeStyleName("visible"); } setEnabled(visible); } protected class ByteStreamResource implements StreamResource.StreamSource { private final ByteArrayInputStream imageBuffer; public ByteStreamResource(byte[] data) { imageBuffer = new ByteArrayInputStream(data); } @Override public InputStream getStream() { return imageBuffer; } } }