I’m using a goofy hack to display tooltips on data points using ChartDirector.

Turns out, one can set the `title`

HTML attribute on data points to tap into the underlying HTML functions of ChartDirector to get tooltips that display the actual values for that point. The thing is it is being set in the `HTMLImageMap`

after the chart is generated, so access to values is now limited. All math must be performed in the tag, meaning only simple math is allowed.

One of the values I have is a time value in decimal format (ie 10.5 minutes) and I’d like to display it in time format (10:30)

I’ve searched around to try to find a mathematical function that could perform this conversion, but everywhere I look the answer is to split the decimal off from the minute value and multiply it to get the seconds value. I’ve been scratching my head, I don’t think I can pull that off with the Parameter Substitution and Formatting tools.

Has anyone done this conversion with ChartDirector, know any better formulas, or have any advice?