Hacking Google Maps and Google Earth (ExtremeTech)

46 Part I — Basics

Table 3-6(continued)

Event Arguments Description

Movestart none Triggered at the beginning of a continuous

pan/drag movement. This event is not

triggered when the map moves discretely.

Moveend none Triggered at the end of a discrete or

continuous map movement. This event is

triggered once at the end of a continuous

pan.

Zoom oldZoomLevel, Triggered after the map zoom level

newZoomLevel changes.

maptypechanged none Triggered after the map type (map, hybrid,

or satellite) changes.

infowindowopen none Triggered after the info window is displayed.

infowindowclose none Triggered after the info window is closed.

addoverlay overlay Triggered after an overlay is added to the

map.

removeoverlay overlay Triggered after an overlay is removed

from the map. Not triggered if

clearOverlaysis called — see the

clearoverlaysevent.

clearoverlays None Triggered after all overlays are cleared from

the map.

Don’t worry if the information presented here seems daunting. Chapter 4 provides more

specific examples of how you use the API and the classes, methods, and objects.

GMarker

This class creates a new GMarkerobject based on the supplied GPointreference.GMarkers

are used to highlight points on a map. All GMarkers are displayed using an icon, either the

default icon supplied by Google Maps or a special icon (previously defined through a GIcon

object) specified as the optional argument to the function:

GMarker(point, icon)