APEX

Hi,

I have a flash chart that includes a selector that alters the query for the chart. Depending on what the user selects, the chart shows a different number of rows (this happens to be a stacked horizontal bar chart, but this could apply to any chart type). I would like to be able to dynamically set the chart height based on the number of rows the query returns. If I set it too small and the user makes a choice that returns a larger number of rows, the chart bars are compressed to the point where the labels are unreadable or omitted altogether. Conversely, if I set the height to a larger value and the user makes a selection that results in a small number of rows, the chart is overly extended and hard to read.

I am able to calculate what I'd like the chart height to be using a page item and a before header process. But I can't figure out how to pass this value to AnyChart. I tried using an item substitution (e.g., &P7_CHART_HEIGHT.) as the value for the chart height on the Chart Attributes/Chart Settings page, but this attribute requires a non-zero numeric value. I tried to figure out if I could alter the chart XML, but could not figure out how to do it and I'm not sure item substitutions would be passed in the XML anyway.

Is there a way to dynamically set the height attribute of a chart at page load time?

Thanks,
Mike