[Lazarus] TChart - How to read first/last values from DbChartSource after zoom

[Gabor Boros]

2013.05.10. 19:56 keltezéssel, Alexander Klenin írta:
> You can use TChart.CurrentExtent property to determine currently
> visible chart area.
> See http://wiki.lazarus.freepascal.org/TAChart_documentation#Extents
>
> --
> Alexander S. Klenin

CurrentExtent return Double type values and tried to convert to 
coordinates but no luck. I worked out a solution for myself. I will 
upload a diff and an example to bug tracker but cannot login into it 
yesterday and today.

Gabor