Java tutorial
/* * Copyright 2016 Red Hat, Inc. and/or its affiliates. * * 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.dashbuilder.client.navbar; import javax.annotation.PostConstruct; import com.google.gwt.http.client.Request; import com.google.gwt.http.client.RequestBuilder; import com.google.gwt.http.client.RequestCallback; import com.google.gwt.http.client.RequestException; import com.google.gwt.http.client.Response; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.HTMLPanel; import com.google.gwt.user.client.ui.SimplePanel; import org.dashbuilder.client.resources.i18n.AppConstants; import org.gwtbootstrap3.client.ui.Label; /** * The Logo banner for the application */ public class LogoWidgetView extends Composite implements LogoWidgetPresenter.View { private SimplePanel container = new SimplePanel(); @PostConstruct public void init() { final RequestBuilder rb = new RequestBuilder(RequestBuilder.GET, "banner/banner.html"); rb.setCallback(new RequestCallback() { @Override public void onResponseReceived(final Request request, final Response response) { final HTMLPanel html = new HTMLPanel(response.getText()); container.setWidget(html); } @Override public void onError(final Request request, final Throwable exception) { container.setWidget(new Label(AppConstants.INSTANCE.logoBannerError())); } }); try { rb.send(); } catch (RequestException re) { container.setWidget(new Label(AppConstants.INSTANCE.logoBannerError())); } initWidget(container); } }