Java tutorial
/* * Copyright 2011 JBoss Inc * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.jbpm.formbuilder.client.notification; import java.util.Collection; import org.jbpm.formapi.client.CommonGlobals; import org.jbpm.formbuilder.client.FormBuilderGlobals; import org.jbpm.formbuilder.client.bus.ui.NotificationsVisibleEvent; import org.jbpm.formbuilder.client.messages.I18NConstants; import org.jbpm.formbuilder.client.resources.FormBuilderResources; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.shared.EventBus; import com.google.gwt.event.shared.UmbrellaException; import com.google.gwt.resources.client.ImageResource; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import com.google.gwt.user.client.DOM; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.Grid; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.HasHorizontalAlignment; import com.google.gwt.user.client.ui.HasVerticalAlignment; import com.google.gwt.user.client.ui.Image; import com.google.gwt.user.client.ui.ScrollPanel; import com.google.gwt.user.client.ui.SimplePanel; import com.google.gwt.user.client.ui.VerticalPanel; public class CompactNotificationsViewImpl extends SimplePanel implements NotificationsView { private final I18NConstants i18n = FormBuilderGlobals.getInstance().getI18n(); private final EventBus bus = CommonGlobals.getInstance().getEventBus(); private final VerticalPanel panel = new VerticalPanel(); private final ScrollPanel scroll = new ScrollPanel(panel); private final Image arrowImage = new Image(); public CompactNotificationsViewImpl() { Button show = new Button(); DOM.setStyleAttribute(show.getElement(), "align", "left"); DOM.setStyleAttribute(show.getElement(), "textAlign", "left"); show.setWidth("100%"); show.setStylePrimaryName("fbStackPanel"); show.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { scroll.setVisible(!scroll.isVisible()); ImageResource down = FormBuilderResources.INSTANCE.arrowDown(); ImageResource up = FormBuilderResources.INSTANCE.arrowUp(); arrowImage.setResource(scroll.isVisible() ? down : up); bus.fireEvent(new NotificationsVisibleEvent(scroll.isVisible())); } }); panel.setVerticalAlignment(HasVerticalAlignment.ALIGN_TOP); scroll.addStyleName("notificationsView"); scroll.setSize("100%", "200px"); arrowImage.setResource(FormBuilderResources.INSTANCE.arrowDown()); VerticalPanel vPanel = new VerticalPanel(); vPanel.setWidth("100%"); Grid table = getButtonText(); show.setHTML(new SafeHtmlBuilder().appendHtmlConstant(table.toString()).toSafeHtml()); scroll.setVisible(false); vPanel.add(show); vPanel.add(scroll); setWidget(vPanel); new NotificationsPresenter(this); } private Grid getButtonText() { Grid buttonText = new Grid(1, 2); buttonText.getCellFormatter().setHorizontalAlignment(0, 0, HasHorizontalAlignment.ALIGN_LEFT); buttonText.getCellFormatter().setHorizontalAlignment(0, 1, HasHorizontalAlignment.ALIGN_RIGHT); buttonText.setWidget(0, 0, new HTML("<strong>" + i18n.Notifications() + "</strong>")); buttonText.setWidth("100%"); buttonText.setBorderWidth(0); buttonText.setCellPadding(0); buttonText.setCellSpacing(0); buttonText.setWidget(0, 1, arrowImage); return buttonText; } @Override public String getColorCss(String name) { String colorCss = "greenNotification"; if ("WARN".equals(name)) { colorCss = "orangeNotification"; } else if ("ERROR".equals(name)) { colorCss = "redNotification"; } return colorCss; } @Override public void append(String colorCss, String message, Throwable error) { HTML html = new HTML(); if (colorCss != null) { html.setStyleName(colorCss); } StringBuilder msg = new StringBuilder(message).append("<br/>"); while (error != null) { msg.append(stringStackTrace(error)); if (error instanceof UmbrellaException) { Collection<Throwable> causes = ((UmbrellaException) error).getCauses(); if (causes != null) { for (Throwable cause : causes) { msg.append(stringStackTrace(cause)); } } } if (error.getCause() != null && !error.equals(error.getCause())) { error = error.getCause(); msg.append(i18n.CausedBy()); } else { error = null; } } html.setHTML(msg.toString()); panel.add(html); if (!scroll.isVisible()) { scroll.setVisible(true); } } private String stringStackTrace(Throwable error) { StringBuilder msg = new StringBuilder(); msg.append(error.getClass().getName()).append(": ").append(error.getLocalizedMessage()).append("<br/>"); StackTraceElement[] trace = error.getStackTrace(); for (int index = 0; trace != null && index < trace.length; index++) { msg.append(i18n.StackTraceLine(trace[index].getClassName(), trace[index].getMethodName(), trace[index].getFileName(), String.valueOf(trace[index].getLineNumber()))).append("<br/>"); } return msg.toString(); } }