/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2011 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.plugin.geocoder.client;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.i18n.client.LocaleInfo;
import com.smartgwt.client.util.SC;
import com.smartgwt.client.widgets.Window;
import com.smartgwt.client.widgets.events.CloseClickHandler;
import com.smartgwt.client.widgets.events.CloseClientEvent;
import org.geomajas.command.CommandResponse;
import org.geomajas.gwt.client.command.CommandCallback;
import org.geomajas.gwt.client.command.GwtCommand;
import org.geomajas.gwt.client.command.GwtCommandDispatcher;
import org.geomajas.gwt.client.map.MapView;
import org.geomajas.gwt.client.spatial.Bbox;
import org.geomajas.gwt.client.widget.MapWidget;
import org.geomajas.plugin.geocoder.client.event.SelectAlternativeEvent;
import org.geomajas.plugin.geocoder.client.event.SelectAlternativeHandler;
import org.geomajas.plugin.geocoder.client.event.SelectLocationEvent;
import org.geomajas.plugin.geocoder.client.event.SelectLocationHandler;
import org.geomajas.plugin.geocoder.command.dto.GetLocationForStringAlternative;
import org.geomajas.plugin.geocoder.command.dto.GetLocationForStringRequest;
import org.geomajas.plugin.geocoder.command.dto.GetLocationForStringResponse;
import java.util.List;
/**
* Widget for starting a geocoder location search.
*
* @author Joachim Van der Auwera
*/
public class GeocoderPresenter implements SelectLocationHandler, SelectAlternativeHandler {
private MapWidget map;
private GeocoderWidget geocoderWidget;
private Window altWindow;
private GeocoderAlternativesGrid altGrid;
private String servicePattern = ".*";
private GeocoderMessages messages = GWT.create(GeocoderMessages.class);
private HandlerManager handlerManager;
/**
* Create geocoder widget which allows searching a location from a string.
*
* @param map map to apply search results
* @param geocoderWidget geocoder widget
*/
GeocoderPresenter(MapWidget map, GeocoderWidget geocoderWidget) {
this.map = map;
this.geocoderWidget = geocoderWidget;
handlerManager = new HandlerManager(this);
setSelectAlternativeHandler(this);
setSelectLocationHandler(this);
}
public void clearLocation() {
geocoderWidget.setValue("");
}
public void goToLocation(final String location) {
GwtCommand command = new GwtCommand(GetLocationForStringRequest.COMMAND);
GetLocationForStringRequest request = new GetLocationForStringRequest();
request.setCrs(map.getMapModel().getCrs());
request.setLocation(location);
request.setServicePattern(servicePattern);
if (GWT.isClient()) {
// causes NPE when run as junit test
String locale = LocaleInfo.getCurrentLocale().getLocaleName();
if (!"default".equals(locale)) {
request.setLocale(locale);
}
}
command.setCommandRequest(request);
GwtCommandDispatcher.getInstance().execute(command, new CommandCallback() {
public void execute(CommandResponse commandResponse) {
goToLocation(commandResponse, location);
}
});
}
public void goToLocation(final CommandResponse commandResponse, final String location) {
if (commandResponse instanceof GetLocationForStringResponse) {
GetLocationForStringResponse response = (GetLocationForStringResponse) commandResponse;
if (response.isLocationFound()) {
removeAltWindow();
handlerManager.fireEvent(new SelectLocationEvent(map, response));
} else {
List<GetLocationForStringAlternative> alternatives = response.getAlternatives();
if (null != alternatives && alternatives.size() > 0) {
handlerManager.fireEvent(new SelectAlternativeEvent(map, alternatives));
} else {
SC.say(messages.locationNotFound(location));
}
}
}
}
private void removeAltWindow() {
if (null != altWindow) {
altWindow.destroy();
altWindow = null;
}
}
/**
* Get the regular expression which is used to select which geocoder services to use.
*
* @return geocoder selection regular expression
*/
public String getServicePattern() {
return servicePattern;
}
/**
* Set the regular expression which is used to select which geocoder services to use.
*
* @param servicePattern geocoder selection regular expression
*/
public void setServicePattern(String servicePattern) {
this.servicePattern = servicePattern;
}
/**
* Set the select alternative handler.
* <p/>
* There can only be one handler, the default displays the alternatives in a window on the map widget.
*
* @param handler select alternative handler
* @return handler registration.
*/
public HandlerRegistration setSelectAlternativeHandler(SelectAlternativeHandler handler) {
if (handlerManager.getHandlerCount(SelectAlternativeHandler.TYPE) > 0) {
SelectAlternativeHandler previous = handlerManager.getHandler(SelectAlternativeHandler.TYPE, 0);
handlerManager.removeHandler(SelectAlternativeHandler.TYPE, previous);
}
return handlerManager.addHandler(SelectAlternativeHandler.TYPE, handler);
}
/**
* Set the select location handler.
* <p/>
* There can only be one handler, the default zooms the map widget to the selected location.
*
* @param handler select location handler
* @return handler registration.
*/
public HandlerRegistration setSelectLocationHandler(SelectLocationHandler handler) {
if (handlerManager.getHandlerCount(SelectLocationHandler.TYPE) > 0) {
SelectLocationHandler previous = handlerManager.getHandler(SelectLocationHandler.TYPE, 0);
handlerManager.removeHandler(SelectLocationHandler.TYPE, previous);
}
return handlerManager.addHandler(SelectLocationHandler.TYPE, handler);
}
// @extract-start DefaultSelectAlternative, Default implementation for SelectAlternativeHandler
public void onSelectAlternative(SelectAlternativeEvent event) {
if (null == altWindow) {
altGrid = new GeocoderAlternativesGrid(geocoderWidget, event.getAlternatives());
altWindow = new Window();
altWindow.setAutoSize(true);
altWindow.setTitle(messages.alternativeSelectTitle());
altWindow.setAutoSize(true);
altWindow.setLeft(20);
altWindow.setTop(20);
altWindow.setCanDragReposition(true);
altWindow.setCanDragResize(true);
altWindow.addItem(altGrid);
altWindow.addCloseClickHandler(new CloseClickHandler() {
public void onCloseClick(CloseClientEvent closeClientEvent) {
removeAltWindow();
}
});
map.addChild(altWindow);
} else {
altGrid.update(event.getAlternatives());
}
}
// @extract-end
// @extract-start DefaultSelectLocation, Default implementation for SelectLocationHandler
public void onSelectLocation(SelectLocationEvent event) {
org.geomajas.geometry.Bbox bbox = event.getBbox();
map.getMapModel().getMapView().applyBounds(new Bbox(bbox), MapView.ZoomOption.LEVEL_FIT);
geocoderWidget.setValue(event.getCanonicalLocation());
}
// @extract-end
/**
* Fire an event.
*
* @param event event to fire
*/
public void fireEvent(GwtEvent<?> event) {
handlerManager.fireEvent(event);
}
}