The #getOption method only returns options that you set - there is no way
to get the specific list of values from the control (at least, not
according to the documentation). You can, however, group the DataTable on
the filtered column to get the total number of unique values, and use that
instead:
google.visualization.events.addListener(personPicker, 'ready', function() {
// get column index, can also use filterColumnLabel, if you set that
option instead
// if you use filterColumnLabel, you will need to translate it back
into an index for the group
var columnIndex = personPicker.getOption('filterColumnIndex');
var group = google.visualization.data.Group(data, [columnIndex]);
var numpersons = group.getNumberOfRows();
alert('numpersons=' + numpersons);
if (numpersons > 1) {
$('div#personfilter').css('display', 'inline-block');
$('div#personfilter').css('visibility', 'visible');
} else {
$('div#personfilter').css('display', 'none');
$('div#personfilter').css('visibility', 'hidden');
}
});
On Friday, July 6, 2012 11:01:14 AM UTC-4, T-Roy wrote:
>
> I am trying to get this code to work on a category filter:
>
> google.visualization.events.addListener(personPicker, 'ready',
> function(){
> //alert('modify personPicker visibility');
> var categoryValues = personPicker.getOption('values');
> alert(categoryValues);
> //categoryValues is always null ???
> if (categoryValues){
> numpersons = categoryValues.length();
> }else{
> numpersons = 1;
> }
> alert('numpersons='+numpersons);
> if(numpersons>1){
> $('div#personfilter').css('display','inline-block');
> $('div#personfilter').css('visibility','visible');
> }else{
> $('div#personfilter').css('display','none');
> $('div#personfilter').css('visibility','hidden');
> }
> });
>
>
> How/When can I get the number of items in the category filter?
>
> Thanks?
>
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