Java tutorial
/* * Copyright (c) 2015 Washington State Department of Transportation * * This program 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. * * This program 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 this program. If not, see <http://www.gnu.org/licenses/> * */ package gov.wa.wsdot.mobile.client.activities.ferries.schedules; import com.google.gwt.aria.client.Roles; import com.google.gwt.core.client.GWT; import com.google.gwt.safehtml.shared.SafeHtml; import com.google.gwt.safehtml.shared.SafeHtmlUtils; import com.google.gwt.uibinder.client.UiBinder; import com.google.gwt.uibinder.client.UiField; import com.google.gwt.uibinder.client.UiHandler; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.ImageResourceRenderer; import com.google.gwt.user.client.ui.Widget; import com.googlecode.gwtphonegap.client.PhoneGap; import com.googlecode.mgwt.dom.client.event.tap.TapEvent; import com.googlecode.mgwt.ui.client.MGWT; import com.googlecode.mgwt.ui.client.widget.base.HasRefresh; import com.googlecode.mgwt.ui.client.widget.header.HeaderTitle; import com.googlecode.mgwt.ui.client.widget.list.celllist.CellList; import com.googlecode.mgwt.ui.client.widget.list.celllist.CellSelectedEvent; import com.googlecode.mgwt.ui.client.widget.panel.flex.FlexSpacer; import com.googlecode.mgwt.ui.client.widget.panel.pull.PullArrowHeader; import com.googlecode.mgwt.ui.client.widget.panel.pull.PullArrowWidget; import com.googlecode.mgwt.ui.client.widget.panel.pull.PullPanel; import com.googlecode.mgwt.ui.client.widget.panel.pull.PullPanel.Pullhandler; import com.googlecode.mgwt.ui.client.widget.progress.ProgressIndicator; import gov.wa.wsdot.mobile.client.css.AppBundle; import gov.wa.wsdot.mobile.client.util.ParserUtils; import gov.wa.wsdot.mobile.client.widget.button.image.BackImageButton; import gov.wa.wsdot.mobile.shared.FerriesRouteItem; import java.util.List; public class FerriesRouteSchedulesViewGwtImpl extends Composite implements FerriesRouteSchedulesView { final PhoneGap phoneGap = GWT.create(PhoneGap.class); /** * The UiBinder interface. */ interface FerriesRouteSchedulesViewGwtImplUiBinder extends UiBinder<Widget, FerriesRouteSchedulesViewGwtImpl> { } /** * The UiBinder used to generate the view. */ private static FerriesRouteSchedulesViewGwtImplUiBinder uiBinder = GWT .create(FerriesRouteSchedulesViewGwtImplUiBinder.class); @UiField HeaderTitle heading; @UiField(provided = true) CellList<FerriesRouteItem> cellList; @UiField BackImageButton backButton; @UiField FlexSpacer leftFlexSpacer; @UiField(provided = true) PullPanel pullToRefresh; @UiField FlowPanel flowPanel; @UiField ProgressIndicator progressIndicator; private Presenter presenter; private PullArrowHeader pullArrowHeader; public FerriesRouteSchedulesViewGwtImpl() { pullToRefresh = new PullPanel(); pullArrowHeader = new PullArrowHeader(); pullToRefresh.setHeader(pullArrowHeader); cellList = new CellList<FerriesRouteItem>(new FerriesRouteSchedulesCell<FerriesRouteItem>() { private ImageResourceRenderer imageRenderer = new ImageResourceRenderer(); @Override public String getDescription(FerriesRouteItem model) { return model.getDescription(); } @Override public String getLastUpdated(FerriesRouteItem model) { return ParserUtils.relativeTime(model.getCacheDate(), "MMMM d, yyyy h:mm a", false); } @Override public SafeHtml getAlertImage(FerriesRouteItem model) { boolean hasAlerts = false; if (!model.getRouteAlert().equals("[]")) hasAlerts = true; SafeHtml image = imageRenderer.render(AppBundle.INSTANCE.btnAlertPNG()); return hasAlerts ? image : SafeHtmlUtils.fromString(""); } @Override public String getCrossingTime(FerriesRouteItem model) { try { if (model.getCrossingTime().equalsIgnoreCase("null")) { return ""; } else { return "Crossing Time: ~ " + model.getCrossingTime() + " min"; } } catch (Exception e) { return ""; } } }); initWidget(uiBinder.createAndBindUi(this)); accessibilityPrepare(); if (MGWT.getOsDetection().isAndroid()) { leftFlexSpacer.setVisible(false); } } @UiHandler("cellList") protected void onCellSelected(CellSelectedEvent event) { if (presenter != null) { int index = event.getIndex(); presenter.onItemSelected(index); } } @UiHandler("backButton") protected void onBackButtonPressed(TapEvent event) { if (presenter != null) { presenter.onBackButtonPressed(); } } @Override public void setPresenter(Presenter presenter) { this.presenter = presenter; } @Override public void render(List<FerriesRouteItem> createTopicsList) { cellList.render(createTopicsList); } @Override public void setSelected(int lastIndex, boolean b) { cellList.setSelectedIndex(lastIndex, b); } @Override public void showProgressIndicator() { progressIndicator.setVisible(true); } @Override public void hideProgressIndicator() { progressIndicator.setVisible(false); } @Override public void refresh() { pullToRefresh.refresh(); } @Override public void setHeaderPullHandler(Pullhandler pullHandler) { pullToRefresh.setHeaderPullHandler(pullHandler); } @Override public PullArrowWidget getPullHeader() { return pullArrowHeader; } @Override public HasRefresh getPullPanel() { return pullToRefresh; } private void accessibilityPrepare() { // Add ARIA roles for accessibility Roles.getButtonRole().set(backButton.getElement()); Roles.getButtonRole().setAriaLabelProperty(backButton.getElement(), "back"); Roles.getHeadingRole().set(heading.getElement()); Roles.getProgressbarRole().set(progressIndicator.getElement()); Roles.getProgressbarRole().setAriaLabelProperty(progressIndicator.getElement(), "loading indicator"); // TODO Hide pull down until we can figure out how to get VoiceOver to work with it Roles.getButtonRole().setAriaHiddenState(pullArrowHeader.getElement(), true); } }