/*
* 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.gwt.client.controller;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.geomajas.command.CommandResponse;
import org.geomajas.command.dto.SearchByLocationRequest;
import org.geomajas.command.dto.SearchByLocationResponse;
import org.geomajas.geometry.Coordinate;
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.MapModel;
import org.geomajas.gwt.client.map.feature.Feature;
import org.geomajas.gwt.client.map.layer.Layer;
import org.geomajas.gwt.client.map.layer.VectorLayer;
import org.geomajas.gwt.client.spatial.Mathlib;
import org.geomajas.gwt.client.spatial.WorldViewTransformer;
import org.geomajas.gwt.client.spatial.geometry.Point;
import org.geomajas.gwt.client.util.GeometryConverter;
import org.geomajas.gwt.client.widget.FeatureAttributeWindow;
import org.geomajas.gwt.client.widget.MapWidget;
import com.google.gwt.event.dom.client.MouseUpEvent;
/**
* Shows information about the clicked feature.
*
* @author Frank Wynants
* @author Pieter De Graef
*/
public class FeatureInfoController extends AbstractGraphicsController {
/** Number of pixels that describes the tolerance allowed when trying to select features. */
private int pixelTolerance;
public FeatureInfoController(MapWidget mapWidget, int pixelTolerance) {
super(mapWidget);
this.pixelTolerance = pixelTolerance;
}
/**
* On mouse up, execute the search by location, and display a
* {@link org.geomajas.gwt.client.widget.FeatureAttributeWindow} if a result is found.
*/
public void onMouseUp(MouseUpEvent event) {
Coordinate worldPosition = getWorldPosition(event);
Point point = mapWidget.getMapModel().getGeometryFactory().createPoint(worldPosition);
SearchByLocationRequest request = new SearchByLocationRequest();
request.setLocation(GeometryConverter.toDto(point));
request.setCrs(mapWidget.getMapModel().getCrs());
request.setQueryType(SearchByLocationRequest.QUERY_INTERSECTS);
request.setSearchType(SearchByLocationRequest.SEARCH_FIRST_LAYER);
request.setBuffer(calculateBufferFromPixelTolerance());
request.setFeatureIncludes(GwtCommandDispatcher.getInstance().getLazyFeatureIncludesSelect());
request.setLayerIds(getServerLayerIds(mapWidget.getMapModel()));
for (Layer<?> layer : mapWidget.getMapModel().getLayers()) {
if (layer.isShowing() && layer instanceof VectorLayer) {
request.setFilter(layer.getServerLayerId(), ((VectorLayer) layer).getFilter());
}
}
GwtCommand commandRequest = new GwtCommand(SearchByLocationRequest.COMMAND);
commandRequest.setCommandRequest(request);
GwtCommandDispatcher.getInstance().execute(commandRequest, new CommandCallback() {
public void execute(CommandResponse commandResponse) {
if (commandResponse instanceof SearchByLocationResponse) {
SearchByLocationResponse response = (SearchByLocationResponse) commandResponse;
Map<String, List<org.geomajas.layer.feature.Feature>> featureMap = response.getFeatureMap();
for (String serverLayerId : featureMap.keySet()) {
List<VectorLayer> layers = mapWidget.getMapModel().getVectorLayersByServerId(serverLayerId);
for (VectorLayer vectorLayer : layers) {
List<org.geomajas.layer.feature.Feature> orgFeatures = featureMap.get(serverLayerId);
if (orgFeatures.size() > 0) {
Feature feature = new Feature(orgFeatures.get(0), vectorLayer);
vectorLayer.getFeatureStore().addFeature(feature);
FeatureAttributeWindow window = new FeatureAttributeWindow(feature, false);
window.setPageTop(mapWidget.getAbsoluteTop() + 10);
window.setPageLeft(mapWidget.getAbsoluteLeft() + 10);
window.draw();
}
}
}
}
}
});
}
// -------------------------------------------------------------------------
// Private methods:
// -------------------------------------------------------------------------
private String[] getServerLayerIds(MapModel mapModel) {
List<String> layerIds = new ArrayList<String>();
for (Layer<?> layer : mapModel.getLayers()) {
if (layer.isShowing()) {
layerIds.add(layer.getServerLayerId());
}
}
return layerIds.toArray(new String[] {});
}
private double calculateBufferFromPixelTolerance() {
WorldViewTransformer transformer = mapWidget.getMapModel().getMapView().getWorldViewTransformer();
Coordinate c1 = transformer.viewToWorld(new Coordinate(0, 0));
Coordinate c2 = transformer.viewToWorld(new Coordinate(pixelTolerance, 0));
return Mathlib.distance(c1, c2);
}
}