Java tutorial
/********************************************** * Copyright (C) 2009 Lukas Laag * This file is part of lib-gwt-svg-samples. * * libgwtsvg-samples 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 3 of the License, or * (at your option) any later version. * * libgwtsvg-samples 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 libgwtsvg-samples. If not, see http://www.gnu.org/licenses/ **********************************************/ package org.vectomatic.svg.samples.client; import org.vectomatic.svg.samples.client.events.EventSample; import org.vectomatic.svg.samples.client.features.FeaturesSample; import org.vectomatic.svg.samples.client.parser.ParserSample; import org.vectomatic.svg.samples.client.shapes.ShapesSample; import org.vectomatic.svg.samples.client.smil.SmilSample; import org.vectomatic.svg.samples.client.widgets.WidgetsSample; import org.vectomatic.svg.samples.client.xpath.XPathSample; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.core.client.GWT; import com.google.gwt.event.logical.shared.SelectionEvent; import com.google.gwt.event.logical.shared.SelectionHandler; import com.google.gwt.resources.client.ClientBundle; import com.google.gwt.resources.client.CssResource; import com.google.gwt.resources.client.ImageResource; import com.google.gwt.uibinder.client.UiBinder; import com.google.gwt.uibinder.client.UiField; import com.google.gwt.user.client.DOM; import com.google.gwt.user.client.ui.AbstractImagePrototype; import com.google.gwt.user.client.ui.DialogBox; import com.google.gwt.user.client.ui.LayoutPanel; import com.google.gwt.user.client.ui.RootLayoutPanel; import com.google.gwt.user.client.ui.SplitLayoutPanel; import com.google.gwt.user.client.ui.Tree; import com.google.gwt.user.client.ui.TreeItem; import com.google.gwt.user.client.ui.Widget; /** * Application main class. Creates the base UI structure and sets up * individual samples * @author laaglu */ public class Main implements EntryPoint { /** * UiBinder template interface */ interface MainBinder extends UiBinder<SplitLayoutPanel, Main> { } private static MainBinder binder = GWT.create(MainBinder.class); /** * The type passed into the * {@link org.vectomatic.svg.samples.generator.SourceGenerator}. */ private static final class GeneratorInfo { } /** * Client bundle interface */ public interface MainBundle extends ClientBundle { @Source("orgball.gif") public ImageResource treeItem(); @Source("main.css") public MainCss css(); } /** * CSS interface */ public interface MainCss extends CssResource { /** * style of tab items */ public String tab(); /** * style of sample container */ public String sample(); } /** * The mai resource bundle */ public static MainBundle mainBundle = GWT.create(MainBundle.class); /** * The sample navigation tree */ @UiField Tree tree; /** * The split panel */ @UiField SplitLayoutPanel splitPanel; /** * A LayoutPanel which acts as a card layout (it has several * child widgets, but only one is visible at a given time). */ @UiField LayoutPanel sampleContainer; @Override public void onModuleLoad() { GWT.setUncaughtExceptionHandler(new GWT.UncaughtExceptionHandler() { public void onUncaughtException(Throwable throwable) { String text = "Uncaught exception: "; while (throwable != null) { StackTraceElement[] stackTraceElements = throwable.getStackTrace(); text += throwable.toString() + "\n"; for (int i = 0; i < stackTraceElements.length; i++) { text += " at " + stackTraceElements[i] + "\n"; } throwable = throwable.getCause(); if (throwable != null) { text += "Caused by: "; } } DialogBox dialogBox = new DialogBox(true); DOM.setStyleAttribute(dialogBox.getElement(), "backgroundColor", "#ABCDEF"); System.err.print(text); text = text.replaceAll(" ", " "); dialogBox.setHTML("<pre>" + text + "</pre>"); dialogBox.center(); } }); mainBundle.css().ensureInjected(); // Generate the source code for the examples GWT.create(GeneratorInfo.class); SplitLayoutPanel panel = binder.createAndBindUi(this); // Populate the sample tree TreeItem shapesSample = tree .addItem(AbstractImagePrototype.create(mainBundle.treeItem()).getHTML() + " shapes"); shapesSample.setUserObject(new ShapesSample()); TreeItem eventSample = tree .addItem(AbstractImagePrototype.create(mainBundle.treeItem()).getHTML() + " events"); eventSample.setUserObject(new EventSample()); TreeItem parserSample = tree .addItem(AbstractImagePrototype.create(mainBundle.treeItem()).getHTML() + " parser"); parserSample.setUserObject(new ParserSample()); TreeItem featuresSample = tree .addItem(AbstractImagePrototype.create(mainBundle.treeItem()).getHTML() + " features"); featuresSample.setUserObject(new FeaturesSample()); TreeItem widgetsSample = tree .addItem(AbstractImagePrototype.create(mainBundle.treeItem()).getHTML() + " widgets"); widgetsSample.setUserObject(new WidgetsSample()); TreeItem smilSample = tree .addItem(AbstractImagePrototype.create(mainBundle.treeItem()).getHTML() + " SMIL animation"); smilSample.setUserObject(new SmilSample()); TreeItem xpathSample = tree .addItem(AbstractImagePrototype.create(mainBundle.treeItem()).getHTML() + " XPath"); xpathSample.setUserObject(new XPathSample()); TreeItem about = tree.addItem(AbstractImagePrototype.create(mainBundle.treeItem()).getHTML() + " about"); about.setUserObject(new AboutSample()); tree.addSelectionHandler(new SelectionHandler<TreeItem>() { @Override public void onSelection(SelectionEvent<TreeItem> event) { SampleBase currentSample = (SampleBase) event.getSelectedItem().getUserObject(); selectSample(currentSample.getPanel()); } }); tree.setSelectedItem(shapesSample); RootLayoutPanel.get().add(panel); } /** * If it is not already a child of the layoutPanel, * adds this sample panel to children of the layoutPanel. Make all other children * hidden except this this sample panel. */ private void selectSample(Widget samplePanel) { int count = sampleContainer.getWidgetCount(); int index = -1; for (int i = 0; i < count; i++) { Widget w = sampleContainer.getWidget(i); if (w != samplePanel) { sampleContainer.setWidgetVisible(w, false); } else { sampleContainer.setWidgetVisible(w, true); index = i; } } if (index == -1) { sampleContainer.add(samplePanel); sampleContainer.setWidgetVisible(samplePanel, true); } } }