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netcultures walk through of beautifying google's horrible javascript spreadsheet mapper
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head>
<script src="http://www.google.com/jsapi"></script>
<script>
google.load("jquery", "1.3");
</script>
<script src="http://maps.google.com/maps?file=api&v=2&key=ABQIAAAArYqxP8iD7yfYTxrLYQmwehT2yXp_ZAY8_ufC3CFXhHIE1NvwkxT6VZV_KCSABr9_i4BGpMSXan7nig"
type="text/javascript">
</script>
<script type="text/javascript">
//<![CDATA[
var cm_map;
var cm_mapMarkers = [];
var cm_mapHTMLS = [];
// Create a base icon for all of our markers that specifies the
// shadow, icon dimensions, etc.
var cm_baseIcon = new GIcon();
cm_baseIcon.shadow = "http://www.google.com/mapfiles/shadow50.png";
cm_baseIcon.iconSize = new GSize(20, 34);
cm_baseIcon.shadowSize = new GSize(37, 34);
cm_baseIcon.iconAnchor = new GPoint(9, 34);
cm_baseIcon.infoWindowAnchor = new GPoint(9, 2);
cm_baseIcon.infoShadowAnchor = new GPoint(18, 25);
// Change these parameters to customize map
var param_wsId = 'od6';
var param_ssKey = 'tQA10qo0HRWIKqH5VxC1e2w';
var param_useSidebar = false;
var param_titleColumn = 'lga';
var param_descriptionColumn = 'income';
var param_latColumn = 'latitude';
var param_lngColumn = 'longitude';
var param_rankColumn = null;
var param_iconType = 'green';
var param_iconOverType = 'orange';
/**
* Loads map and calls function to load in worksheet data.
*/
google.setOnLoadCallback(
function() {
if (GBrowserIsCompatible()) {
// create the map
cm_map = new GMap2(document.getElementById("cm_map"));
cm_map.addControl(new GLargeMapControl());
cm_map.addControl(new GMapTypeControl());
cm_map.setCenter(new GLatLng( 43.907787,-79.359741), 2);
$.getJSON('http://spreadsheets.google.com/feeds/list' + '/' + param_ssKey + '/' + param_wsId + '/public/values' + '?alt=json-in-script&callback=?',
cm_loadMapJSON);
} else {
alert("Sorry, the Google Maps API is not compatible with this browser");
}
}
)
/**
* Function called when marker on the map is clicked.
* Opens an info window (bubble) above the marker.
* @param {Number} markerNum Number of marker in global array
*/
function cm_markerClicked(markerNum) {
cm_mapMarkers[markerNum].openInfoWindowHtml(cm_mapHTMLS[markerNum]);
}
/**
* Function that sorts 2 worksheet rows from JSON feed
* based on their rank column. Only called if column is defined.
* @param {rowA} Object Represents row in JSON feed
* @param {rowB} Object Represents row in JSON feed
* @return {Number} Difference between row values
*/
function cm_sortRows(rowA, rowB) {
var rowAValue = parseFloat(rowA["gsx$" + param_rankColumn].$t);
var rowBValue = parseFloat(rowB["gsx$" + param_rankColumn].$t);
return rowAValue - rowBValue;
}
/**
* Called when JSON is loaded. Creates sidebar if param_sideBar is true.
* Sorts rows if param_rankColumn is valid column. Iterates through worksheet rows,
* creating marker and sidebar entries for each row.
* @param {JSON} json Worksheet feed
*/
function cm_loadMapJSON(json) {
var usingRank = false;
if(param_useSidebar == true) {
var sidebarTD = document.createElement("td");
sidebarTD.setAttribute("width","150");
sidebarTD.setAttribute("valign","top");
var sidebarDIV = document.createElement("div");
sidebarDIV.id = "cm_sidebarDIV";
sidebarDIV.style.overflow = "auto";
sidebarDIV.style.height = "400px";
sidebarDIV.style.fontSize = "11px";
sidebarDIV.style.color = "#000000";
sidebarTD.appendChild(sidebarDIV);
document.getElementById("cm_mapTR").appendChild(sidebarTD);
}
var bounds = new GLatLngBounds();
if(json.feed.entry[0]["gsx$" + param_rankColumn]) {
usingRank = true;
json.feed.entry.sort(cm_sortRows);
}
for (var i = 0; i < json.feed.entry.length; i++) {
var entry = json.feed.entry[i];
if(entry["gsx$" + param_latColumn]) {
var lat = parseFloat(entry["gsx$" + param_latColumn].$t);
var lng = parseFloat(entry["gsx$" + param_lngColumn].$t);
var point = new GLatLng(lat,lng);
var html = "<div style='font-size:12px'>";
html += "<strong>" + entry["gsx$"+param_titleColumn].$t
+ "</strong>";
var label = entry["gsx$"+param_titleColumn].$t;
var rank = 0;
if(usingRank && entry["gsx$" + param_rankColumn]) {
rank = parseInt(entry["gsx$"+param_rankColumn].$t);
}
if(entry["gsx$" + param_descriptionColumn]) {
html += "<br/>" + entry["gsx$"+param_descriptionColumn].$t;
}
html += "</div>";
// create the marker
var marker = cm_createMarker(point,label,html,rank);
cm_map.addOverlay(marker);
cm_mapMarkers.push(marker);
cm_mapHTMLS.push(html);
bounds.extend(point);
if(param_useSidebar == true) {
var markerA = document.createElement("a");
markerA.setAttribute("href","javascript:cm_markerClicked('" + i +"')");
markerA.style.color = "#000000";
var sidebarText= "";
if(usingRank) {
sidebarText += rank + ") ";
}
sidebarText += label;
markerA.appendChild(document.createTextNode(sidebarText));
sidebarDIV.appendChild(markerA);
sidebarDIV.appendChild(document.createElement("br"));
sidebarDIV.appendChild(document.createElement("br"));
}
}
}
cm_map.setZoom(cm_map.getBoundsZoomLevel(bounds));
cm_map.setCenter(bounds.getCenter());
}
/**
* Creates marker with ranked Icon or blank icon,
* depending if rank is defined. Assigns onclick function.
* @param {GLatLng} point Point to create marker at
* @param {String} title Tooltip title to display for marker
* @param {String} html HTML to display in InfoWindow
* @param {Number} rank Number rank of marker, used in creating icon
* @return {GMarker} Marker created
*/
function cm_createMarker(point, title, html, rank) {
var markerOpts = {};
var nIcon = new GIcon(cm_baseIcon);
if(rank > 0 && rank < 100) {
nIcon.imageOut = "http://gmaps-samples.googlecode.com/svn/trunk/" +
"markers/" + param_iconType + "/marker" + rank + ".png";
nIcon.imageOver = "http://gmaps-samples.googlecode.com/svn/trunk/" +
"markers/" + param_iconOverType + "/marker" + rank + ".png";
nIcon.image = nIcon.imageOut;
} else {
nIcon.imageOut = "http://gmaps-samples.googlecode.com/svn/trunk/" +
"markers/" + param_iconType + "/blank.png";
nIcon.imageOver = "http://gmaps-samples.googlecode.com/svn/trunk/" +
"markers/" + param_iconOverType + "/blank.png";
nIcon.image = nIcon.imageOut;
}
markerOpts.icon = nIcon;
markerOpts.title = title;
var marker = new GMarker(point, markerOpts);
GEvent.addListener(marker, "click", function() {
marker.openInfoWindowHtml(html);
});
GEvent.addListener(marker, "mouseover", function() {
marker.setImage(marker.getIcon().imageOver);
});
GEvent.addListener(marker, "mouseout", function() {
marker.setImage(marker.getIcon().imageOut);
});
GEvent.addListener(marker, "infowindowopen", function() {
marker.setImage(marker.getIcon().imageOver);
});
GEvent.addListener(marker, "infowindowclose", function() {
marker.setImage(marker.getIcon().imageOut);
});
return marker;
}
//]]>
</script>
</head><body>
<!-- ++Begin GSpreadsheets Map Wizard Generated Code++ -->
<div style="width:px; font-family:Arial,
sans-serif; font-size:11px; border:1px solid black">
<table id="cm_mapTABLE"> <tbody> <tr id="cm_mapTR">
<td> <div id="cm_map" style="width:400px; height:400px"></div> </td>
</tr> </tbody></table>
</div>
</body> </html>
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