Java tutorial
/* * Copyright (c) 2016 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.departures; import com.google.gwt.aria.client.Roles; import com.google.gwt.aria.client.SelectedValue; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ChangeEvent; import com.google.gwt.event.logical.shared.SelectionEvent; import com.google.gwt.i18n.client.DateTimeFormat; import com.google.gwt.i18n.client.TimeZone; import com.google.gwt.i18n.client.TimeZoneInfo; import com.google.gwt.i18n.client.constants.TimeZoneConstants; 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.HTML; import com.google.gwt.user.client.ui.Widget; 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.input.listbox.MListBox; 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.flex.RootFlexPanel; 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.panel.scroll.ScrollPanel; import com.googlecode.mgwt.ui.client.widget.progress.ProgressIndicator; import com.googlecode.mgwt.ui.client.widget.tabbar.TabPanel; import gov.wa.wsdot.mobile.client.activities.camera.CameraCell; import gov.wa.wsdot.mobile.client.util.ParserUtils; import gov.wa.wsdot.mobile.client.widget.button.image.BackImageButton; import gov.wa.wsdot.mobile.client.widget.tabbar.CameraTabBarButton; import gov.wa.wsdot.mobile.client.widget.tabbar.TimeTabBarButton; import gov.wa.wsdot.mobile.shared.CameraItem; import gov.wa.wsdot.mobile.shared.FerriesScheduleTimesItem; import java.util.Date; import java.util.List; public class FerriesRouteDeparturesViewGwtImpl extends Composite implements FerriesRouteDeparturesView { /** * The UiBinder interface. */ interface FerriesRouteDeparturesViewGwtImplUiBinder extends UiBinder<Widget, FerriesRouteDeparturesViewGwtImpl> { } /** * The UiBinder used to generate the view. */ private static FerriesRouteDeparturesViewGwtImplUiBinder uiBinder = GWT .create(FerriesRouteDeparturesViewGwtImplUiBinder.class); @UiField HeaderTitle heading; @UiField RootFlexPanel times; @UiField RootFlexPanel cameras; @UiField(provided = true) CellList<FerriesScheduleTimesItem> cellList; @UiField(provided = true) CellList<CameraItem> cameraCellList; @UiField TabPanel tabPanel; @UiField TimeTabBarButton timesTab; @UiField CameraTabBarButton camerasTab; @UiField static ScrollPanel cameraScrollPanel; @UiField BackImageButton backButton; @UiField FlexSpacer leftFlexSpacer; @UiField(provided = true) PullPanel pullToRefresh; @UiField HTML title; @UiField ProgressIndicator progressIndicator; @UiField(provided = true) MListBox daysOfWeek; private Presenter presenter; private PullArrowHeader pullArrowHeader; private DateTimeFormat dateFormat = DateTimeFormat.getFormat("hh:mm a"); private DateTimeFormat dayOfWeekFormat = DateTimeFormat.getFormat("EEEE"); private final TimeZoneConstants timeZoneConstants = GWT.create(TimeZoneConstants.class); private final TimeZone usPacific = TimeZone .createTimeZone(TimeZoneInfo.buildTimeZoneData(timeZoneConstants.americaLosAngeles())); public FerriesRouteDeparturesViewGwtImpl() { pullToRefresh = new PullPanel(); pullArrowHeader = new PullArrowHeader(); pullToRefresh.setHeader(pullArrowHeader); daysOfWeek = new MListBox(); handleOnLoad(); cellList = new CellList<FerriesScheduleTimesItem>( new FerriesRouteDeparturesCell<FerriesScheduleTimesItem>() { @Override public String getDeparting(FerriesScheduleTimesItem model) { Date departingTime = new Date(Long.parseLong(model.getDepartingTime())); return dateFormat.format(departingTime, usPacific); } @Override public String getArriving(FerriesScheduleTimesItem model) { if (!model.getArrivingTime().equals("N/A")) { Date arrivingTime = new Date(Long.parseLong(model.getArrivingTime())); return dateFormat.format(arrivingTime, usPacific); } else { return ""; } } @Override public SafeHtml getAnnotation(FerriesScheduleTimesItem model) { if (model.getAnnotations() != null) { return SafeHtmlUtils.fromTrustedString(model.getAnnotations()); } else { return SafeHtmlUtils.fromString(""); } } @Override public boolean canBeSelected(FerriesScheduleTimesItem model) { return false; } @Override public String getDriveUpSpaces(FerriesScheduleTimesItem model) { return String.valueOf(model.getDriveUpSpaceCount()); } @Override public String getMaxSpaceCount(FerriesScheduleTimesItem model) { return String.valueOf(model.getMaxSpaceCount()); } @Override public String getLastUpdated(FerriesScheduleTimesItem model) { if (model.getLastUpdated() != null) { return ParserUtils.relativeTime(model.getLastUpdated(), "MMMM d, yyyy h:mm a", false); } else { return ""; } } }); cameraCellList = new CellList<CameraItem>(new CameraCell<CameraItem>() { @Override public String getUrl(CameraItem model) { return model.getImageUrl(); } @Override public boolean canBeSelected(CameraItem model) { return true; } }); initWidget(uiBinder.createAndBindUi(this)); accessibilityPrepare(); if (MGWT.getOsDetection().isAndroid()) { leftFlexSpacer.setVisible(false); cameraScrollPanel.setBounce(false); } } /** * ScrollPanel doesn't allow scrolling to the bottom if it contains a CellList with images. * * See: https://code.google.com/p/mgwt/issues/detail?id=276 * * ScrollPanel.refresh() must be explicitly called after the images are loaded. * Since the onload event of images is not bubbling up, the LoadHandler can't be attached * to the CellList. Instead, the onload event needs to be captured at the <img>, and directly * trigger the ScrollPanel.refresh() from there. */ private native void handleOnLoad() /*-{ $wnd.refreshPanel = @gov.wa.wsdot.mobile.client.activities.ferries.schedules.departures.FerriesRouteDeparturesViewGwtImpl::refreshPanel(); }-*/; public static void refreshPanel() { cameraScrollPanel.refresh(); } @UiHandler("tabPanel") protected void onTabSelected(SelectionEvent<Integer> event) { if (presenter != null) { int index = event.getSelectedItem(); presenter.onTabSelected(index); } } @UiHandler("timesTab") protected void onTimesTabPressed(TapEvent event) { if (presenter != null) { accessibilityShowTimes(); } } @UiHandler("camerasTab") protected void onCamerasTabPressed(TapEvent event) { if (presenter != null) { accessibilityShowCameras(); } } @UiHandler("backButton") protected void onBackButtonPressed(TapEvent event) { if (presenter != null) { presenter.onBackButtonPressed(); } } @UiHandler("daysOfWeek") protected void onChange(ChangeEvent event) { if (presenter != null) { MListBox source = (MListBox) event.getSource(); presenter.onDayOfWeekSelected(source.getSelectedIndex()); } } @UiHandler("cameraCellList") protected void onCameraCellSelected(CellSelectedEvent event) { if (presenter != null) { int index = event.getIndex(); presenter.onCameraSelected(index); } } @Override public void setPresenter(Presenter presenter) { this.presenter = presenter; } @Override public void setTitle(String title) { this.title.setHTML(title); } @Override public void render(List<FerriesScheduleTimesItem> departureTimesList) { cellList.render(departureTimesList); } @Override public void renderCameras(List<CameraItem> cameraList) { cameraCellList.render(cameraList); } @Override public void showProgressIndicator() { progressIndicator.setVisible(true); } @Override public void hideProgressIndicator() { progressIndicator.setVisible(false); } @Override public void refresh() { pullToRefresh.refresh(); } @Override public void refreshCameras() { cameraScrollPanel.refresh(); } @Override public int getDayOfWeekSelected() { return daysOfWeek.getSelectedIndex(); } @Override public void setDayOfWeekSelected(int index) { daysOfWeek.setSelectedIndex(index); } @Override public void renderDaysOfWeek(List<String> days) { daysOfWeek.clear(); for (String day : days) { daysOfWeek.addItem(dayOfWeekFormat.format(new Date(Long.parseLong(day)))); } } @Override public void setHeaderPullHandler(Pullhandler pullHandler) { pullToRefresh.setHeaderPullHandler(pullHandler); } @Override public PullArrowWidget getPullHeader() { return pullArrowHeader; } @Override public HasRefresh getPullPanel() { return pullToRefresh; } @Override public void setCameraSelected(int lastIndex, boolean b) { cameraCellList.setSelectedIndex(lastIndex, b); } @Override public void removeTab(int tabIndex) { this.tabPanel.tabBar.remove(tabIndex); this.tabPanel.tabContainer.container.remove(tabIndex); this.tabPanel.tabContainer.refresh(); } @Override public int getTabCount() { return this.tabPanel.tabContainer.container.getWidgetCount(); } private void accessibilityShowTimes() { Roles.getMainRole().setAriaHiddenState(times.getElement(), false); Roles.getMainRole().setAriaHiddenState(cameras.getElement(), true); Roles.getTabRole().setAriaSelectedState(timesTab.getElement(), SelectedValue.TRUE); Roles.getTabRole().setAriaSelectedState(camerasTab.getElement(), SelectedValue.FALSE); } private void accessibilityShowCameras() { Roles.getMainRole().setAriaHiddenState(times.getElement(), true); Roles.getMainRole().setAriaHiddenState(cameras.getElement(), false); Roles.getTabRole().setAriaSelectedState(timesTab.getElement(), SelectedValue.FALSE); Roles.getTabRole().setAriaSelectedState(camerasTab.getElement(), SelectedValue.TRUE); } 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.getMenuRole().set(daysOfWeek.getElement()); Roles.getMenuRole().setAriaLabelProperty(daysOfWeek.getElement(), "select a departing day"); Roles.getMenuRole().setTabindexExtraAttribute(daysOfWeek.getElement(), 0); Roles.getMainRole().set(times.getElement()); Roles.getMainRole().set(cameras.getElement()); Roles.getTabRole().set(timesTab.getElement()); Roles.getTabRole().setAriaSelectedState(timesTab.getElement(), SelectedValue.TRUE); Roles.getTabRole().setAriaLabelProperty(timesTab.getElement(), "times"); Roles.getTabRole().set(camerasTab.getElement()); Roles.getTabRole().setAriaSelectedState(camerasTab.getElement(), SelectedValue.FALSE); Roles.getTabRole().setAriaLabelProperty(camerasTab.getElement(), "cameras"); 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); accessibilityShowTimes(); } }