Java tutorial
/******************************************************************************* * Copyright (c) 2012 Torkild U. Resheim. * * All rights reserved. This program and the accompanying materials are made * available under the terms of the Eclipse Public License v1.0 which * accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Torkild U. Resheim - initial API and implementation *******************************************************************************/ package no.resheim.elibrarium.library.ui.views; import java.io.File; import java.net.MalformedURLException; import java.net.URI; import java.net.URISyntaxException; import java.net.URL; import java.text.MessageFormat; import no.resheim.elibrarium.library.Book; import no.resheim.elibrarium.library.core.ILibraryListener; import no.resheim.elibrarium.library.core.Librarian; import no.resheim.elibrarium.library.ui.LibraryLabelProvider; import org.eclipse.core.filesystem.EFS; import org.eclipse.core.filesystem.IFileStore; import org.eclipse.emf.common.util.EList; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IMenuListener; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.IStatusLineManager; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.action.Separator; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.DecoratingLabelProvider; import org.eclipse.jface.viewers.DecoratingStyledCellLabelProvider; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.ILabelDecorator; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerSorter; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Menu; import org.eclipse.ui.IWorkbenchActionConstants; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.PartInitException; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.contexts.IContextService; import org.eclipse.ui.ide.IDE; import org.eclipse.ui.part.ViewPart; public class LibraryView extends ViewPart implements ILibraryListener { /** * The ID of the view as specified by the extension. */ public static final String VIEW_ID = "no.resheim.elibrarium.library.ui.views.LibraryView"; private TableViewer viewer; private Action doubleClickAction; private void refreshView() { getSite().getShell().getDisplay().asyncExec(new Runnable() { @Override public void run() { if (!viewer.getControl().isDisposed()) { viewer.refresh(); } } }); } class ViewContentProvider implements IStructuredContentProvider { public void inputChanged(Viewer v, Object oldInput, Object newInput) { } public void dispose() { } public Object[] getElements(Object parent) { EList<Book> books = Librarian.getDefault().getLibrary().getBooks(); return books.toArray(); } } /** * A sorter designed to sort book titles. Will ignore "the" in titles that * starts with this word. * * @author Torkild U. Resheim */ class NameSorter extends ViewerSorter { @Override public int compare(Viewer viewer, Object e1, Object e2) { if (e1 instanceof Book && e2 instanceof Book) { String t1 = ((Book) e1).getTitle().toLowerCase(); String t2 = ((Book) e2).getTitle().toLowerCase(); if (t1.startsWith("the ")) { t1 = t1.substring(4); } if (t2.startsWith("the ")) { t2 = t2.substring(4); } int result = t1.compareTo(t2); if (result != 0) { return result; } } // fall back to comparing by label return super.compare(viewer, e1, e2); } } /** * The constructor. */ public LibraryView() { } public class TableDecoratingLabelProvider extends DecoratingLabelProvider implements ITableLabelProvider { ITableLabelProvider provider; ILabelDecorator decorator; /** * @param provider * @param decorator */ public TableDecoratingLabelProvider(ILabelProvider provider, ILabelDecorator decorator) { super(provider, decorator); this.provider = (ITableLabelProvider) provider; this.decorator = decorator; } /* * (non-Javadoc) * * @see * org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(java * .lang.Object, int) */ public Image getColumnImage(Object element, int columnIndex) { Image image = provider.getColumnImage(element, columnIndex); if (decorator != null) { Image decorated = decorator.decorateImage(image, element); if (decorated != null) { return decorated; } } return image; } /* * (non-Javadoc) * * @see * org.eclipse.jface.viewers.ITableLabelProvider#getColumnText(java. * lang.Object, int) */ public String getColumnText(Object element, int columnIndex) { String text = provider.getColumnText(element, columnIndex); if (decorator != null) { String decorated = decorator.decorateText(text, element); if (decorated != null) { return decorated; } } return text; } } @Override public void createPartControl(Composite parent) { viewer = new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL); viewer.setContentProvider(new ViewContentProvider()); viewer.setSorter(new NameSorter()); viewer.setLabelProvider(new DecoratingStyledCellLabelProvider(new LibraryLabelProvider(), null, null)); viewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { ISelection selection = event.getSelection(); if (selection instanceof IStructuredSelection) { Object o = ((IStructuredSelection) selection).getFirstElement(); if (o instanceof Book) { String urlString = ((Book) o).getBookURL(); try { URL url = new URL(urlString); IStatusLineManager manager = getViewSite().getActionBars().getStatusLineManager(); manager.setMessage(url.getFile()); } catch (MalformedURLException e) { e.printStackTrace(); } } } } }); // Register the selection provider getSite().setSelectionProvider(viewer); makeActions(); hookContextMenu(); hookDoubleClickAction(); // Activate the view specific context PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() { public void run() { ((IContextService) PlatformUI.getWorkbench().getService(IContextService.class)) .activateContext(VIEW_ID); } }); // Set contents Librarian.getDefault().addListener(this); viewer.setInput(getViewSite()); } private void hookContextMenu() { MenuManager menuMgr = new MenuManager("#PopupMenu"); menuMgr.setRemoveAllWhenShown(true); menuMgr.addMenuListener(new IMenuListener() { public void menuAboutToShow(IMenuManager manager) { LibraryView.this.fillContextMenu(manager); } }); Menu menu = menuMgr.createContextMenu(viewer.getControl()); viewer.getControl().setMenu(menu); getSite().registerContextMenu(menuMgr, viewer); } private void fillContextMenu(IMenuManager manager) { // Other plug-ins can contribute there actions here manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS)); } private void makeActions() { doubleClickAction = new Action() { @Override public void run() { ISelection selection = viewer.getSelection(); Object obj = ((IStructuredSelection) selection).getFirstElement(); if (obj instanceof Book) { try { File fileToOpen = new File(new URI(((Book) obj).getBookURL())); if (fileToOpen.exists() && fileToOpen.isFile()) { IFileStore fileStore = EFS.getLocalFileSystem().getStore(fileToOpen.toURI()); IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow() .getActivePage(); try { IDE.openEditorOnFileStore(page, fileStore); } catch (PartInitException e) { } } else { MessageDialog.openError(getSite().getShell(), "Missing book", MessageFormat .format("The book at \"{0}\" is missing.", fileToOpen.getAbsolutePath())); } } catch (URISyntaxException e1) { e1.printStackTrace(); } } } }; } private void hookDoubleClickAction() { viewer.addDoubleClickListener(new IDoubleClickListener() { public void doubleClick(DoubleClickEvent event) { doubleClickAction.run(); } }); } /** * Passing the focus request to the viewer's control. */ @Override public void setFocus() { viewer.getControl().setFocus(); IContextService contextService = (IContextService) getSite().getService(IContextService.class); contextService.activateContext(VIEW_ID); } @Override public void bookAdded(final Book book) { refreshView(); // AbstractUiNotification notification = new // AbstractUiNotification("no.resheim.elibrarium.library.ui.event") { // // @SuppressWarnings("rawtypes") // @Override // public Object getAdapter(Class adapter) { // return null; // } // // @Override // public String getLabel() { // return "Book added"; // } // // @Override // public String getDescription() { // return "Added \"" + book.getTitle() + "\" to library."; // } // // @Override // public Date getDate() { // return new Date(System.currentTimeMillis()); // } // // @Override // public Image getNotificationImage() { // return null; // } // // @Override // public Image getNotificationKindImage() { // return // LibraryUIPlugin.getDefault().getImageRegistry().get(LibraryUIPlugin.IMG_BOOK); // } // // @Override // public void open() { // } // }; // NotificationsUi.getService().notify(Collections.singletonList(notification)); } @Override public void bookRemoved(Book book) { refreshView(); } }