I needed a simple Google Maps component for some application. Although there were some examples, none of them was using the composite approach, which I wanted to use for its benefits.
I thought it would be useful to share my example, so here it is.
It accepts a couple of parameters (but has reasonible defaults for most of them): zoom, address, ...
Maybe I'll improve this later. Any suggestion welcome.
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:composite="http://java.sun.com/jsf/composite">
<!-- INTERFACE -->
<composite:interface>
<composite:attribute name="zoom" type="java.lang.Integer" default="14" />
<composite:attribute name="width" type="java.lang.Integer" default="400" />
<composite:attribute name="height" type="java.lang.Integer" default="300" />
<composite:attribute name="address" type="java.lang.String" required="true" />
<composite:attribute name="mapType" type="java.lang.String" default="ROADMAP" />
<composite:attribute name="lat" type="java.lang.Number" default="0" />
<composite:attribute name="long" type="java.lang.Number" default="0" />
</composite:interface>
<!-- IMPLEMENTATION -->
<composite:implementation>
<h:outputScript target="head">
var geocoder;
var map;
function loadApi(src) {
var scriptElement = document.createElement("script");
scriptElement.src = src;
scriptElement.type = "text/javascript";
var headElement = document.getElementsByTagName("head")[0];
headElement.appendChild(scriptElement);
}
function loadGMapsApi() {
if (google) {
return;
}
loadApi("http://maps.google.com/maps/api/js?sensor=false");
}
function initializeMap(elementId) {
loadGMapsApi();
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(#{cc.attrs.lat}, #{cc.attrs.long});
var myOptions = {
zoom: #{cc.attrs.zoom},
center: latlng,
mapTypeId: google.maps.MapTypeId.#{cc.attrs.mapType}
}
map = new google.maps.Map(document.getElementById(elementId), myOptions);
gotoAddress("#{cc.attrs.address}");
}
function gotoAddress(address) {
if (geocoder) {
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
var marker = new google.maps.Marker({
map: map,
position: results[0].geometry.location
});
} else {
//alert("Geocode was not successful for the following reason: " + status);
}
});
}
}
</h:outputScript>
<h:panelGroup layout="block" style="width: #{cc.attrs.width}px; height: #{cc.attrs.height}px;" id="map_canvas" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"/>
<h:outputScript>
initializeMap("#{cc.clientId}:map_canvas");
</h:outputScript>
</composite:implementation>
</html>
lundi 12 avril 2010
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