Perspective XY Chart - Get Selected Range

I am using an XY chart as a Gantt chart. I am implementing it using a horizontal scroll bar. Are there any properties or methods to know what range the horizontal scroll bar is currently selecting?

Since this had gone a few days without an answer, I created an XYChart to see what I could figure out on it. By manipulating the xAxes[0].date.format, I can get the tooltip to display the zoomed range, but I haven't been able to pull that information out to a usable location. For example: self.parent.getChild("XYChart").requestTooltip() returns None. What we're really looking for here is the zoomed range. Does anybody else have any ideas on how to access this data?