Hello All,
I'm not massively experienced with JavaScript or Google Visualization API
so I could be missing something obvious. It seems impossible to set up a
generalised function to create a visualization for an external data source,
whilst I can easily generalise the input URL for the external data is is
from my current understanding not possible to pass the specific element I
would like to attach the visualization to through to the query callback
function.
Here's what I've got:
<script type="text/javascript">
function drawDocsTable( url, div-id ) {
// Can easily set the URL I wish to grab the data from
var query = new google.visualization.Query( url );
// The callback function cannot take additional parameters..
query.send( drawDocsTableCallback );
}
function drawDocsTableCallback(response) {
if (response.isError()) {
alert('Error in query: ' + response.getMessage() + ' ' +
response.getDetailedMessage());
return;
}
var data = response.getDataTable();
// Therefore I can only have a static element
visualization = new
google.visualization.Table(document.getElementById('table'));
visualization.draw(data, null);
}
</script>
I'd rather not have to create a new callback function for every different
visualization. I considered putting the element into a global scope
variable, but if I call this function again before the data is fetched then
it would get overridden.
Thoughts?
Will
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