Hi,
I have one DBGrid and Chart(LineSeries) with same DataSource. Want to filter DBGrid's content depend Chart's zoom status. How to read the actual first/last values from Chart if it zoomed?
Gabor
Mailing lists / lazarus / 2013-05
TChart - How to read first/last values from DbChartSource after zoom
4 messages · 2 people · –
- Gabor Boros 3
- Alexander Klenin 1
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Gabor Boros wrote 6 lines
Hi,
I have one DBGrid and Chart(LineSeries) with same DataSource. Want to filter
DBGrid's content depend Chart's zoom status. How to read the actual
first/last values from Chart if it zoomed?
You can use TChart.CurrentExtent property to determine currently visible chart area.
See http://wiki.lazarus.freepascal.org/TAChart_documentation#Extents
Alexander S. Klenin
2013.05.10. 19:56 keltez?ssel, Alexander Klenin ?rta:
Show quoted text 6 lines
You can use TChart.CurrentExtent property to determine currently
visible chart area.
See http://wiki.lazarus.freepascal.org/TAChart_documentation#Extents
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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
You can use TChart.CurrentExtent property to determine currently visible chart area. See…