Draggable point

[Razorblade]

Hello Everyone,
is there any way to make a point on the chart draggable?

I’m tring to figure out by myself using click and mousemove events,
but I didn’t found a method to get the new Y using a proportion between
Y and datapoint.Y, I don’t think this could work because Y is the value
that starts from the upper left corner of the canvas instead datapoint.Y starts from
the chart bottom (correct me if I mistake).

Anyone ever tried to achieve such task?

Thanks

[Razorblade]

I did it using column chart type,
using both click event to enable ‘edit mode’ and mousemove to increase/decrease the bar value,
depending on the Y difference between the latest and current mouse position.

Can see my solution here https://github.com/kaiohken1982/Chart

Any advice on how to improve this solution are welcome :)