Java tutorial
/******************************************************************************* * Copyright (c) 2013 EclipseSource and others. * 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: * EclipseSource - initial API and implementation ******************************************************************************/ package com.eclipsesource.tabris.demos.ui; import static com.eclipsesource.tabris.demos.ui.BookDetailsPage.BOOK_ITEM; import static com.eclipsesource.tabris.demos.ui.Constants.BOOKS; import static com.eclipsesource.tabris.demos.ui.Constants.RELATED_BOOKS_FONT; import static com.eclipsesource.tabris.demos.ui.Constants.TITLE_FONT; import static com.eclipsesource.tabris.widgets.enhancement.Widgets.*; import java.util.List; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.resource.FontRegistry; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.rap.rwt.RWT; import org.eclipse.rap.rwt.template.ImageCell; import org.eclipse.rap.rwt.template.Template; import org.eclipse.rap.rwt.template.TextCell; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.FontData; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Tree; import org.eclipse.swt.widgets.TreeColumn; import com.eclipsesource.tabris.ui.AbstractPage; import com.eclipsesource.tabris.ui.PageData; import com.eclipsesource.tabris.ui.UI; public class BooksListPage extends AbstractPage { private BookFilter bookFilter; private Composite container; private TreeViewer viewer; private static UI ui; public void setBookFilter(BookFilter bookFilter) { this.bookFilter = bookFilter; } @Override public void createContent(Composite parent, PageData data) { ui = getUI(); registerResources(); createBooks(); container = new Composite(parent, SWT.NONE); GridLayoutFactory.fillDefaults().spacing(0, 0).applyTo(container); viewer = createTreeViewer(this, container); createViewerInput(viewer); } private void registerResources() { FontRegistry fontRegistry = JFaceResources.getFontRegistry(); fontRegistry.put(TITLE_FONT, createFontData(16, SWT.BOLD)); fontRegistry.put(RELATED_BOOKS_FONT, createFontData(16, SWT.BOLD)); } private FontData[] createFontData(int height, int style) { return new FontData[] { new FontData("Verdana", height, style) }; } private void createBooks() { Object books = RWT.getUISession().getAttribute(BOOKS); if (books == null) { books = BookProvider.getBooks(getUI().getDisplay()); RWT.getUISession().setAttribute(BOOKS, books); } } public Composite getContainer() { return container; } public static TreeViewer createTreeViewer(AbstractPage page, Composite container) { TreeViewer viewer = new TreeViewer(container, SWT.V_SCROLL); viewer.setContentProvider(new BooksContentProvider()); addBookSelectionListener(page, viewer); Tree tree = viewer.getTree(); tree.setLinesVisible(true); tree.setData(RWT.MARKUP_ENABLED, Boolean.TRUE); onTree(tree).setTemplate(createRowTemplate()); onTree(tree).setItemHeight(68); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).grab(true, true).applyTo(tree); viewer.setLabelProvider(new BooksLabelProvider()); new TreeColumn(tree, SWT.LEFT); new TreeColumn(tree, SWT.LEFT); new TreeColumn(tree, SWT.LEFT); return viewer; } private static Template createRowTemplate() { Template template = new Template(); addImageCell(template); addTitleCell(template); addAuthorCell(template); return template; } private static void addAuthorCell(Template template) { TextCell authorCell = new TextCell(template); authorCell.setBindingIndex(2); authorCell.setLeft(52).setRight(10).setTop(36).setBottom(0); authorCell.setForeground(new Color(ui.getDisplay(), new RGB(123, 123, 123))); authorCell.setFont(new Font(ui.getDisplay(), new FontData("Verdana", 14, SWT.NONE))); } private static void addTitleCell(Template template) { TextCell titleCell = new TextCell(template); titleCell.setBindingIndex(1); titleCell.setLeft(52).setRight(10).setTop(12).setBottom(0); titleCell.setFont(new Font(ui.getDisplay(), new FontData("Verdana", 18, SWT.NONE))); titleCell.setForeground(new Color(ui.getDisplay(), new RGB(74, 74, 74))); } private static void addImageCell(Template template) { ImageCell imageCell = new ImageCell(template); imageCell.setBindingIndex(0); imageCell.setLeft(10).setWidth(32).setTop(10).setHeight(48); } @SuppressWarnings("unchecked") private void createViewerInput(TreeViewer viewer) { List books = (List) RWT.getUISession().getAttribute(BOOKS); List<Book> filteredBooks = bookFilter.filter(books); viewer.setInput(filteredBooks); } private static void addBookSelectionListener(final AbstractPage page, TreeViewer viewer) { viewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { Object book = ((IStructuredSelection) event.getSelection()).getFirstElement(); if (book != null) { PageData data = new PageData(); data.set(BOOK_ITEM, book); page.openPage(BookDetailsPage.class.getName(), data); } } }); } @Override public void activate() { super.activate(); viewer.setSelection(null); } }