Hi,
I am developing a map with custom tiles using Google Maps API V2.
I am sorry that I cannot post a link to my page because it requires a
vpn.
So far, the custom tiling is successful. On the custom map, I want to
add a GEvent listener to generate polygon or polyline with a mouse
click. Below is my code:
function init() {
...
var map = new GMap2(document.getElementById("map"));
var customTileLayers = [new GTileLayer(...)];
customTileLayers[0].getTileUrl = customGetTileUrl;
var customMap = new GMapType(customTileLayers, new
GMercatorProjection(12)...);
map.addMapType(customMap);
map.setCenter(new GLatLng(0, 0), 3, customMap);
// I will skip explanation up to this point. It is just a routine
for custom map.
GEvent.addListener(map, "click", function(overlay, latlng) {
var lat = latlng.lat();
var lon = latlng.lng();
var latOffset = 10;
var lonOffset = 10;
var polygon = new GPolygon([
new GLatLng(lat, lon - lonOffset),
new GLatLng(lat + latOffset, lon),
new GLatLng(lat, lon + lonOffset),
new GLatLng(lat - latOffset, lon),
new GLatLng(lat, lon - lonOffset)], "#f33f00", 5);
map.addOverlay(polygon); // <------- THIS IS THE PROBLEM, I
THINK!!
});
}
}
I checked that latitude and longitude information are correctly
captured by GEvent listener. It seems that the GPolygon object is
created without a problem. However, the last line
(map.addOverlay(polygon);) causes a javascript error "Object doesn't
support this property or method".
Could anyone please help me??
* I tried different orderings among "map.addMapType", "map.setCenter",
and "GEvent.addListener", but still got the same error.
** I tried to add the GEvent listener on the "customMap" (GMapType
object) but it is not working. So it seems that the source object for
the GEvent listener has to be "map" (GMap2 object).
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