Hiya, I am a Front End Developer. I am trying to learn GWT. I think my code is pretty straightforward. I am creating a DockPanel and in the center of it I have adding a MapPage object that extends Vertical Panel.
Each time you click on the Map a marker appear which some text in InfoWindow. Interaction is pretty much what this example does : http://gwt.google.com/samples/HelloMaps-1.0.4/HelloMaps.html#Draggable%20Markers Ok for some reason when closing the InfoWindow using cross icon. I get 3 alert errors, which YES/NO button to debug with IE tool: Line: 1123 Error: 'this.ra' is null or not an object Click NO Line: 469 Error: 'null' is null or not an object Click NO Line: 469 Error: 'null' is null or not an object In Eclipse: com.google.gwt.core.client.JavaScriptException: (TypeError): 'null' is null or not an object number: -2146823281 description: 'null' is null or not an object at com.google.gwt.maps.client.impl.OverlayImpl.bindConcreteOverlay (Native Method) at com.google.gwt.maps.client.overlay.Overlay$ConcreteOverlay.<init> (Overlay.java:42) at com.google.gwt.maps.client.overlay.Marker.<init>(Marker.java:130) at com.wikik.client.pages.MapPage$3.onClick(MapPage.java:96) at com.google.gwt.maps.client.MapWidget$8.callback(MapWidget.java: 481) at com.google.gwt.maps.client.impl.EventImpl$OverlayLatLngCallback $1.execute(EventImpl.java:193) at com.google.gwt.maps.client.impl.EventImpl.invokeAndReportUncaughtExceptions (EventImpl.java:260) at com.google.gwt.maps.client.impl.EventImpl.invokeAndMaybeReportUncaughtExceptions (EventImpl.java:246) at com.google.gwt.maps.client.impl.EventImpl.access$0(EventImpl.java: 241) at com.google.gwt.maps.client.impl.EventImpl $OverlayLatLngCallback.callbackWrapper(EventImpl.java:191) The code of MapPage.java import com.google.gwt.user.client.ui.VerticalPanel; 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.event.MapClickHandler; 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.maps.client.InfoWindow; import com.google.gwt.maps.client.event.MarkerDragEndHandler; import com.google.gwt.maps.client.event.MarkerDragStartHandler; public class MapPage extends VerticalPanel { private MapWidget map; private Marker newMarker; private InfoWindow info = null; private void createNewMarker() { MarkerOptions options = MarkerOptions.newInstance(); options.setDraggable(true); LatLng point = LatLng.newInstance(0,0); newMarker = new Marker(point, options); newMarker.setVisible(false); newMarker.addMarkerDragEndHandler(new MarkerDragEndHandler() { public void onDragEnd(MarkerDragEndEvent event) { info.open(newMarker, new InfoWindowContent("heouhr oehro eh")); } }); newMarker.addMarkerDragStartHandler(new MarkerDragStartHandler() { public void onDragStart(MarkerDragStartEvent event) { info.setVisible(false); } }); } public MapPage() { map = new MapWidget(); map.setZoomLevel(2); map.setSize("100%", "100%"); // Add some controls for the zoom level map.addControl(new LargeMapControl()); // remember InfoWindow info = map.getInfoWindow(); // initialise newMarketobject this.createNewMarker(); map.addMapClickHandler(new MapClickHandler() { public void onClick(MapClickEvent event) { if (newMarker != null) { newMarker.setVisible(false); } LatLng point = event.getLatLng(); newMarker.setLatLng(point); map.addOverlay(newMarker); info.open(newMarker, new InfoWindowContent("heouhr oehro eh")); } }); map.setVisible(true); add(map); } } Any idea why I see some errors? Cheers --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~----------~----~----~----~------~----~------~--~---
