Try reusing the chart object instead of recreating them over and over. Get
rid of the setInterval call and replace drawChart with this:
function drawChart() {
var chart = new
google.visualization.AnnotationChart(document.getElementById('chart_div'));
function updateChart () {
var jsonData = $.ajax({
url: "/data/aceResponse.txt",
dataType: "json",
async: false,
cache: false
}).responseText;
var interval = $.ajax({
url: "/data/IntervalRequest.txt",
dataType: "text",
async: false,
cache: false
}).responseText;
$("#interval").text(interval);
var data = new google.visualization.DataTable(jsonData);
chart.draw(data, {
is3D: true,
colors: ['red'],
displayZoomButtons: false,
displayRangeSelector: false,
dateFormat: 'HH:mm:ss'
});
}
updateChart();
setInterval(updateChart, 10000);
}
On Thursday, May 22, 2014 3:41:00 PM UTC-4, Paul Duer wrote:
>
>
> Hey all, I am using the following Javascript. But, it causing the chart to
> BREAK badly on each update.
>
> What have I done wrong?
>
> <script type="text/javascript">
> google.load('visualization', '1.1', { 'packages':
> ['annotationchart'] });
> google.setOnLoadCallback(drawChart);
>
> setInterval(drawChart, 10000);
>
>
> function drawChart() {
> var jsonData = $.ajax({
> url: "/data/aceResponse.txt",
> dataType: "json",
> async: false,
> cache: false
> }).responseText;
> var interval = $.ajax({
> url: "/data/IntervalRequest.txt",
> dataType: "text",
> async: false,
> cache: false
> }).responseText;
>
> $("#interval").text(interval);
> var data = new google.visualization.DataTable(jsonData);
>
> var chart = new
> google.visualization.AnnotationChart(document.getElementById('chart_div'));
> chart.draw(data, {
> is3D: true,
>
> colors: ['red'],
> displayZoomButtons: false,
> displayRangeSelector: false,
> dateFormat: 'HH:mm:ss'
> });
> }
>
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