Loading google datatable using ajax/json
- by puff
I can't figure out how to load a datable using ajax/json. Here is my json code in a remote file (pie.json)
{
cols: [{id: 'task', label: 'Task', type: 'string'},
{id: 'hours', label: 'Hours per Day', type: 'number'}],
rows: [{c:[{v: 'Work'}, {v: 11}]},
{c:[{v: 'Eat'}, {v: 2}]},
{c:[{v: 'Commute'}, {v: 2}]},
{c:[{v: 'Watch TV'}, {v:2}]},
{c:[{v: 'Sleep'}, {v:7, f:'7.000'}]}
]
}
This is what I have tried so far but it doesn't work.
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("visualization", "1", {packages:["piechart"]});
function ajaxjson() {
jsonreq=GetXmlHttpObject();
jsonreq.open("GET", "pie.json", true);
jsonreq.onreadystatechange = jsonHandler;
jsonreq.send(null);
}
function jsonHandler() {
if (jsonreq.readyState == 4)
{
var res = jsonreq.responseText;
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable(res, 0.6)
var chart = new google.visualization.PieChart(document.getElementByI('chart_div'));
chart.draw(data, {width: 400, height: 240, is3D: true});
} // end drawChart
} // end if
} // end jsonHandler
function GetXmlHttpObject()
{
var xmlHttp=null;
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
return xmlHttp;
}
Things work perfectly if I replace the 'res' variable with the actual code in pie.json.
Any help would be greatly appreciated.
