Hacking Google Maps and Google Earth (ExtremeTech)

44 Part I — Basics

Table 3-3(continued)

Method Description

recenterOrPanTo Centers the map at the given point, doing a fluid pan to the

LatLng(latLng) point if it is within the current map viewport.

zoomTo(zoomLevel) Zooms to the given integer zoom level, ignoring the request if

the given zoom level is outside the bounds of the current map

type.

centerAndZoom(latLng, Atomically centers and zooms the map. Useful to initialize the

zoomLevel) map with an initial center and zoom level.

getMapTypes() Returns an array of map types supported by this map

(currently G_MAP_TYPE, G_HYBRID_TYPE, and

G_SATELLITE_TYPE).

getCurrentMapType() Returns the map type currently in use (G_MAP_TYPE,

G_HYBRID_TYPE, or G_SATELLITE_TYPE).

setMapType(mapType) Switches this map to the given map type (G_MAP_TYPE,

G_HYBRID_TYPE, or G_SATELLITE_TYPE).

To add an overlay to the map, you must first create the overlay (using GMarkeror

GPolyline) and then use the addOverlaymethod from Table 3-4 to draw the overlay onto

the map. You can also delete an overlay (providing you have the object definition) or remove all

overlays.

Table 3-4: Methods for Adding/Removing Overlays to a Map

Method Description

addOverlay(overlay) Adds the given overlay object to the map.

removeOverlay(overlay) Removes the given overlay object from the map.

clearOverlays() Removes all of the overlays from the map.

To add an information window to a map, use the methods in Table 3-5. Note that the methods

in this table are primarily aimed at adding information windows to areas of the map that do

not have a specific marker; there is a separate method for adding information windows to

markers that is part of the definition for the GMarkerobject.

You configure events for a map object, marker, or other element by using one of the event types

specified in Table 3-6. These events are common to all places where you can specify an event.