Java tutorial
/** * Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org> * * 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.onebusaway.webapp.gwt.where_library.view; import org.onebusaway.geospatial.model.CoordinateBounds; import org.onebusaway.transit_data.model.StopBean; import org.onebusaway.webapp.gwt.where_library.OBAConfig; import org.onebusaway.webapp.gwt.where_library.view.events.StopClickedEvent; import org.onebusaway.webapp.gwt.where_library.view.events.StopClickedHandler; import org.onebusaway.webapp.gwt.where_library.view.stops.TransitMapManager; import com.google.gwt.core.client.GWT; import com.google.gwt.core.client.Scheduler; import com.google.gwt.core.client.Scheduler.ScheduledCommand; import com.google.gwt.event.dom.client.MouseOverEvent; import com.google.gwt.maps.client.InfoWindow; import com.google.gwt.maps.client.InfoWindowContent; import com.google.gwt.maps.client.MapWidget; import com.google.gwt.maps.client.control.LargeMapControl; import com.google.gwt.maps.client.control.MapTypeControl; import com.google.gwt.maps.client.control.ScaleControl; import com.google.gwt.maps.client.geom.LatLng; import com.google.gwt.maps.client.geom.LatLngBounds; import com.google.gwt.uibinder.client.UiBinder; import com.google.gwt.uibinder.client.UiFactory; import com.google.gwt.uibinder.client.UiField; import com.google.gwt.uibinder.client.UiHandler; import com.google.gwt.user.client.Command; import com.google.gwt.user.client.DeferredCommand; import com.google.gwt.user.client.ui.Anchor; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.FormPanel; import com.google.gwt.user.client.ui.FormPanel.SubmitEvent; import com.google.gwt.user.client.ui.Panel; import com.google.gwt.user.client.ui.TextBox; import com.google.gwt.user.client.ui.Widget; public class StopFinderWidget extends Composite { private static MyUiBinder _uiBinder = GWT.create(MyUiBinder.class); private static OBAConfig _config = OBAConfig.getConfig(); private static LatLng _center = LatLng.newInstance(_config.getCenterLat(), _config.getCenterLon()); private static int _zoom = 11; /***************************************************************************** * Private Members ****************************************************************************/ @UiField FlowPanel _titlePanel; @UiField FormPanel _searchFormPanel; @UiField TextBox _searchTextBox; @UiField FlowPanel _linksPanel; @UiField Anchor _currentLinkAnchor; @UiField FlowPanel _resultsPanel; @UiField MapWidgetComposite _mapPanel; @UiField StopFinderCssResource style; protected MapWidget _map = new MapWidget(_center, _zoom); protected TransitMapManager _transitMapManager = new TransitMapManager(_map); protected StopFinderInterface _stopFinder; /***************************************************************************** * Public Methods ****************************************************************************/ public StopFinderWidget() { initWidget(_uiBinder.createAndBindUi(this)); _map.addControl(new LargeMapControl()); _map.addControl(new MapTypeControl()); _map.addControl(new ScaleControl()); _map.setScrollWheelZoomEnabled(true); // We delay initialization of the map Scheduler scheduler = Scheduler.get(); scheduler.scheduleDeferred(new ScheduledCommand() { @Override public void execute() { _map.checkResizeAndCenter(); CoordinateBounds b = _config.getBounds(); LatLng from = LatLng.newInstance(b.getMinLat(), b.getMinLon()); LatLng to = LatLng.newInstance(b.getMaxLat(), b.getMaxLon()); LatLngBounds bounds = LatLngBounds.newInstance(from, to); int zoom = _map.getBoundsZoomLevel(bounds); System.out.println(bounds + " => " + zoom); _map.setZoomLevel(zoom); _map.checkResizeAndCenter(); } }); _transitMapManager.addStopClickedHandler(new StopClickedHandler() { @Override public void handleStopClicked(StopClickedEvent event) { StopBean stop = event.getStop(); InfoWindow window = _map.getInfoWindow(); LatLng point = LatLng.newInstance(stop.getLat(), stop.getLon()); Widget widget = getStopInfoWindowWidget(stop, style); window.open(point, new InfoWindowContent(widget)); } }); } public void setStopFinder(StopFinderInterface stopFinder) { _stopFinder = stopFinder; } public StopFinderInterface getStopFinder() { return _stopFinder; } public MapWidget getMapWidget() { return _map; } public TransitMapManager getTransitMapManager() { return _transitMapManager; } public StopFinderCssResource getCss() { return style; } @UiFactory MapWidgetComposite makeMapPanel() { return new MapWidgetComposite(_map); } /**** * Public Methods ****/ public void setTitleWidget(Widget widget) { _titlePanel.clear(); _titlePanel.add(widget); } public void setSearchText(String value) { _searchTextBox.setText(value); DeferredCommand.addCommand(new Command() { public void execute() { _searchTextBox.setFocus(true); } }); } public void resetContents() { _map.clearOverlays(); _resultsPanel.clear(); } public Panel getResultsPanel() { return _resultsPanel; } /**** * Local Methods ****/ @UiHandler("_searchFormPanel") void doSubmit(SubmitEvent event) { event.cancel(); String value = _searchTextBox.getText(); if (value == null) return; value = value.trim(); if (value.length() == 0) return; _stopFinder.query(value); } @UiHandler("_currentLinkAnchor") void onCurrentLinkAnchorMouseOver(MouseOverEvent event) { String url = _stopFinder.getCurrentViewAsUrl(); _currentLinkAnchor.setHref(url); } protected Widget getStopInfoWindowWidget(StopBean stop, StopFinderCssResource css) { return new StopInfoWindowWidget(_stopFinder, _transitMapManager, stop, css); } protected void hideLinksPanel() { _linksPanel.setVisible(false); } interface MyUiBinder extends UiBinder<Widget, StopFinderWidget> { } }