Java tutorial
/** * Copyright 2014-2016 CyberVision, 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.kaaproject.kaa.sandbox.web.client.mvp.activity; import java.util.ArrayList; import java.util.List; import org.kaaproject.avro.ui.gwt.client.util.BusyAsyncCallback; import org.kaaproject.kaa.sandbox.web.client.Sandbox; import org.kaaproject.kaa.sandbox.web.client.mvp.ClientFactory; import org.kaaproject.kaa.sandbox.web.client.mvp.event.project.ProjectFilterEvent; import org.kaaproject.kaa.sandbox.web.client.mvp.event.project.ProjectFilterEventHandler; import org.kaaproject.kaa.sandbox.web.client.mvp.place.MainPlace; import org.kaaproject.kaa.sandbox.web.client.mvp.view.FilterView; import org.kaaproject.kaa.sandbox.web.client.util.Analytics; import org.kaaproject.kaa.sandbox.web.client.util.Utils; import org.kaaproject.kaa.sandbox.web.shared.dto.FilterData; import com.google.gwt.activity.shared.AbstractActivity; import com.google.gwt.event.shared.EventBus; import com.google.gwt.event.shared.HandlerRegistration; import com.google.gwt.place.shared.Place; import com.google.gwt.user.client.ui.AcceptsOneWidget; public class LeftPanelActivity extends AbstractActivity { private final ClientFactory clientFactory; private final FilterView filterView; protected List<HandlerRegistration> registrations = new ArrayList<HandlerRegistration>(); public LeftPanelActivity(ClientFactory clientFactory) { this.clientFactory = clientFactory; this.filterView = clientFactory.getFilterView(); } @Override public void start(AcceptsOneWidget containerWidget, final EventBus eventBus) { registrations.add(filterView.addProjectFilterHandler(new ProjectFilterEventHandler() { @Override public void onProjectFilter(ProjectFilterEvent event) { clientFactory.getPlaceController().goTo(new MainPlace()); eventBus.fireEvent(event); } })); this.filterView.reset(); Sandbox.getSandboxService().getFilterData(new BusyAsyncCallback<FilterData>() { @Override public void onSuccessImpl(FilterData result) { filterView.setFilterData(result); } @Override public void onFailureImpl(Throwable caught) { String message = Utils.getErrorMessage(caught); Analytics.sendException(message); } }); containerWidget.setWidget(filterView.asWidget()); } @Override public void onStop() { for (HandlerRegistration registration : registrations) { registration.removeHandler(); } registrations.clear(); } public void setPlace(Place place) { filterView.setActive(place != null && place instanceof MainPlace); } }