Reset bounds on Google Maps API v3 - google-maps

Question

How can I reset the bounds of a GoogleMap when user selects an option? Bounds have already been set to include a 'big picture' of the area, I want to zoom to a specfic area when the user selects an option...and need to do so by resetting the bounds. Extending to include the lat/longs won't work, as they are already included.

Answer 1

You have to create a new bounds object, add the map points to it, and then add the bounds object to the map.
Condensed solution:
//Create new bounds object
var bounds = new google.maps.LatLngBounds();
//Loop through an array of points, add them to bounds
for (var i = 0; i < data.length; i++) {
var geoCode = new google.maps.LatLng(data[i][1], data[i][2]);
bounds.extend(geoCode);
}
//Add new bounds object to map
map.fitBounds(bounds);
My complete solution for removing existing markers, getting an updated array of points via ajax, adding them to the map, and then resetting the map boundries.
<script type="text/javascript">
var map;
var markers = [];
$(document).ready(function () {
initialize();
setInterval(function () {
setMarkers();
}, 3000);
});
google.maps.visualRefresh = true;
function initialize()
{
var mapOptions = {
zoom: 2,
center: new google.maps.LatLng(45, -93),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
setMarkers();
}
function setMarkers()
{
removeMarkers();
var bounds = new google.maps.LatLngBounds();
$.ajax({
url: "/Your/Url?variable=123",
dataType: "json",
success: function (data) {
//Data returned is made up of string[3]
if (data != null) {
//loop through data
for (var i = 0; i < data.length; i++) {
var geoCode = new google.maps.LatLng(data[i][1], data[i][2]);
var marker = new google.maps.Marker({
position: geoCode,
map: map,
title: data[i][0],
content: '<div style="height:50px;width:200px;">' + data[i][0] + '</div>'
});
var infowindow = new google.maps.InfoWindow();
google.maps.event.addListener(marker, 'click', function () {
infowindow.setContent(this.content);
infowindow.open(map, this);
});
markers.push(marker);
bounds.extend(geoCode);
}
}
map.fitBounds(bounds);
}
});
}
function removeMarkers()
{
for (var i = 0; i < markers.length; i++) {
markers[i].setMap(null);
}
}