/*
* Copyright 2008 Google Inc.
*
* 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 com.google.gwt.maps.sample.hellomaps.client;
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.event.MarkerClickHandler;
import com.google.gwt.maps.client.geom.LatLng;
import com.google.gwt.maps.client.geom.LatLngBounds;
import com.google.gwt.maps.client.overlay.Marker;
import com.google.gwt.user.client.ui.HTML;
/**
* In this example, we show a custom info window above each marker by listening
* to the click event for each marker.
*/
public class MarkerInfoWindowDemo extends MapsDemo {
private static HTML descHTML = null;
private static final String descString = "<p>Creates a 500 x 300 pixel map viewport centered on Palo Alto, CA USA.</p>"
+ "<p>Displays markers at random points. Clicking on a marker displays an "
+ "InfoWindow with the number of the marker in the content.</p>\n";
public static MapsDemoInfo init() {
return new MapsDemoInfo() {
@Override
public MapsDemo createInstance() {
return new MarkerInfoWindowDemo();
}
@Override
public HTML getDescriptionHTML() {
if (descHTML == null) {
descHTML = new HTML(descString);
}
return descHTML;
}
@Override
public String getName() {
return "Display Info Windows Above Markers";
}
};
}
private MapWidget map;
public MarkerInfoWindowDemo() {
map = new MapWidget(LatLng.newInstance(37.4419, -122.1419), 13);
map.setSize("500px", "300px");
initWidget(map);
map.setUIToDefault();
}
@Override
public void onShow() {
map.clearOverlays();
// Add 10 markers to the map at random locations
LatLngBounds bounds = map.getBounds();
LatLng southWest = bounds.getSouthWest();
LatLng northEast = bounds.getNorthEast();
double lngSpan = northEast.getLongitude() - southWest.getLongitude();
double latSpan = northEast.getLatitude() - southWest.getLatitude();
for (int i = 0; i < 10; i++) {
LatLng point = LatLng.newInstance(southWest.getLatitude() + latSpan
* Math.random(), southWest.getLongitude() + lngSpan * Math.random());
map.addOverlay(createMarker(point, i + 1));
}
}
private Marker createMarker(LatLng point, final int number) {
final Marker marker = new Marker(point);
marker.addMarkerClickHandler(new MarkerClickHandler() {
public void onClick(MarkerClickEvent event) {
InfoWindow info = map.getInfoWindow();
info.open(marker,
new InfoWindowContent("Marker #<b>" + number + "</b>"));
}
});
return marker;
}
}