/*
* 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.MarkerDragEndHandler;
import com.google.gwt.maps.client.event.MarkerDragStartHandler;
import com.google.gwt.maps.client.geom.LatLng;
import com.google.gwt.maps.client.overlay.Marker;
import com.google.gwt.maps.client.overlay.MarkerOptions;
import com.google.gwt.user.client.ui.HTML;
/**
* Markers are interactive objects that can be clicked on and dragged to a new
* location. In this example, we place a draggable marker on the map, and listen
* to a few of its simpler events. Draggable markers support four kinds of
* events -- click, dragstart, drag and dragend. By default, markers are
* clickable but not draggable, so they need to be initialized with the
* additional marker option draggable set to true. Draggable markers are also
* bouncy by default. If you don't like this behavior, just set the bouncy
* option to false and it will drop down gracefully.
*/
public class DragMarkerDemo 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>Draws a marker at the center of the maps window. The marker will move if you click and drag it.</p>\n"
+ "<p>Equivalent to the Maps JavaScript API Example: "
+ "<a href=\"http://code.google.com/apis/maps/documentation/examples/marker-drag.html\">"
+ "http://code.google.com/apis/maps/documentation/examples/marker-drag.html</a></p>\n";
public static MapsDemoInfo init() {
return new MapsDemoInfo() {
@Override
public MapsDemo createInstance() {
return new DragMarkerDemo();
}
@Override
public HTML getDescriptionHTML() {
if (descHTML == null) {
descHTML = new HTML(descString);
}
return descHTML;
}
@Override
public String getName() {
return "Draggable Markers";
}
};
}
private MapWidget map;
public DragMarkerDemo() {
map = new MapWidget(LatLng.newInstance(37.4419, -122.1419), 13);
map.setSize("500px", "300px");
initWidget(map);
}
@Override
public void onShow() {
map.clearOverlays();
MarkerOptions options = MarkerOptions.newInstance();
options.setDraggable(true);
final Marker marker = new Marker(map.getCenter(), options);
final InfoWindow info = map.getInfoWindow();
marker.addMarkerDragEndHandler(new MarkerDragEndHandler() {
public void onDragEnd(MarkerDragEndEvent event) {
info.open(marker, new InfoWindowContent("Just bouncing along..."));
}
});
marker.addMarkerDragStartHandler(new MarkerDragStartHandler() {
public void onDragStart(MarkerDragStartEvent event) {
info.setVisible(false);
}
});
map.addOverlay(marker);
}
}