You need to use an intermediary function:
query.send(function (response) {
drawDocsTableCallback(response, element);
});
and give the callback function an element parameter:
function drawDocsTableCallback(response, element) {
//...
}
On Friday, June 7, 2013 6:45:40 PM UTC-4, Will Gardner wrote:
>
> 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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