Java tutorial
/* * Copyright 2012 JBoss, by Red Hat, 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.jboss.errai.bus.client.util; import com.google.gwt.core.client.GWT; import com.google.gwt.dom.client.Style; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.logical.shared.ValueChangeEvent; import com.google.gwt.event.logical.shared.ValueChangeHandler; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.AbsolutePanel; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.CheckBox; import com.google.gwt.user.client.ui.DialogBox; 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.HorizontalPanel; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.Panel; import com.google.gwt.user.client.ui.VerticalPanel; import org.jboss.errai.bus.client.framework.ClientMessageBusImpl; /** * The built-in, default error dialog. */ public class BusErrorDialog extends DialogBox { boolean showErrors = !GWT.isProdMode(); Panel contentPanel = new AbsolutePanel(); public BusErrorDialog(final ClientMessageBusImpl clientMessageBus) { hide(); setModal(false); final VerticalPanel panel = new VerticalPanel(); final HorizontalPanel titleBar = new HorizontalPanel(); titleBar.getElement().getStyle().setProperty("backgroundColor", "#A9A9A9"); titleBar.getElement().getStyle().setWidth(100, Style.Unit.PCT); titleBar.getElement().getStyle().setProperty("borderBottom", "1px solid black"); titleBar.getElement().getStyle().setProperty("marginBottom", "5px"); final Label titleBarLabel = new Label("An Error Occurred in the Bus"); titleBarLabel.getElement().getStyle().setFontSize(10, Style.Unit.PT); titleBarLabel.getElement().getStyle().setFontWeight(Style.FontWeight.BOLDER); titleBarLabel.getElement().getStyle().setColor("white"); titleBar.add(titleBarLabel); titleBar.setCellVerticalAlignment(titleBarLabel, HasVerticalAlignment.ALIGN_MIDDLE); final HorizontalPanel buttonPanel = new HorizontalPanel(); final CheckBox showFurtherErrors = new CheckBox(); showFurtherErrors.setValue(showErrors); showFurtherErrors.setText("Show further errors"); showFurtherErrors.getElement().getStyle().setFontSize(10, Style.Unit.PT); showFurtherErrors.getElement().getStyle().setColor("white"); showFurtherErrors.addValueChangeHandler(new ValueChangeHandler<Boolean>() { @Override public void onValueChange(final ValueChangeEvent<Boolean> booleanValueChangeEvent) { showErrors = booleanValueChangeEvent.getValue(); } }); final Button disconnectFromServer = new Button("Disconnect Bus"); disconnectFromServer.addClickHandler(new ClickHandler() { @Override public void onClick(final ClickEvent event) { if (Window.confirm( "Are you sure you want to disconnect and de-federate the local bus from the server bus? " + "This will permanently kill your session. You will need to refresh to reconnect. OK will proceed. Click " + "Cancel to abort this operation")) { clientMessageBus.stop(true); } } }); final Button clearErrors = new Button("Clear Log"); clearErrors.addClickHandler(new ClickHandler() { @Override public void onClick(final ClickEvent event) { contentPanel.clear(); } }); final Button closeButton = new Button("Dismiss Error"); closeButton.addClickHandler(new ClickHandler() { @Override public void onClick(final ClickEvent event) { BusErrorDialog.this.hide(); } }); buttonPanel.add(showFurtherErrors); buttonPanel.add(disconnectFromServer); buttonPanel.add(clearErrors); buttonPanel.add(closeButton); buttonPanel.setCellVerticalAlignment(showFurtherErrors, HasVerticalAlignment.ALIGN_MIDDLE); titleBar.add(buttonPanel); titleBar.setCellHorizontalAlignment(buttonPanel, HasHorizontalAlignment.ALIGN_RIGHT); panel.add(titleBar); final Style s = panel.getElement().getStyle(); s.setProperty("border", "1px"); s.setProperty("borderStyle", "solid"); s.setProperty("borderColor", "black"); s.setProperty("backgroundColor", "#ede0c3"); resize(); panel.add(contentPanel); add(panel); getElement().getStyle().setZIndex(16777271); } public void addError(final String message, final String additionalDetails, final Throwable e) { if (!showErrors) return; contentPanel.add(new HTML("<strong style='background:red;color:white;'>" + message + "</strong>")); final StringBuilder buildTrace = new StringBuilder("<tt style=\"font-size:11px;\"><pre>"); if (e != null) { e.printStackTrace(); buildTrace.append(e.getClass().getName()).append(": ").append(e.getMessage()).append("<br/>"); for (final StackTraceElement ste : e.getStackTrace()) { buildTrace.append(" ").append(ste.toString()).append("<br/>"); } } buildTrace.append("</pre>"); contentPanel.add(new HTML( buildTrace.toString() + "<br/><strong>Additional Details:</strong>" + additionalDetails + "</tt>")); if (!isShowing()) { resize(); show(); center(); } } private void resize() { contentPanel.setWidth(Window.getClientWidth() * 0.90 + "px"); contentPanel.setHeight(Window.getClientHeight() * 0.90 + "px"); contentPanel.getElement().getStyle().setProperty("overflow", "auto"); } }