xAxis.ceiling not correctly honored when scrolling when xAxis.min is not set.

[marklofdahl]

Expected behaviour

When xAxis.min is null or not present, xAxis ceiling should be honored correctly, like it is when xAxis.min is 0.

Actual behaviour

When xAxis.min is not present (or is null), xAxis ceiling is not correctly honored when scrolling. When the chart is initially displayed, the ceiling is correctly honored. When the scrollbar is moved, an additional column is shown when it shouldn't be.

Live demo with steps to reproduce

problem when xAxis.min is not set - https://jsfiddle.net/marklofdahl/quLdrbch/
correct when xAxis.min is 0 - https://jsfiddle.net/marklofdahl/tar6gdwq/

Product version

Highstock 9.1.2

Affected browser(s)

All

Is there a different workaround other than setting xAxis.min = 0 for all my charts?

[raf18seb]

Hi @marklofdahl, thanks for creating the ticket.

The bug is about calculating the xAxis.minRange. When setting xAxis.min or xAxis.max, then minRange is null and it's working fine.
However, if neither min nor max are set, then the default minRange is calculated to 5 (5 times smallest interval). Then, if the ceiling is set to a number smaller than 5, e.g. 3, when dragging the scrollbar, it jumps from 3 to 5.

Summarizing: ceiling (and probably floor as well) should affect the minRange just the same as the min and max do.

It's not related to Stock (yes, the scrollbar is a Stock's feature, but the bug is about calculating the minRange).

Simplified demo: https://jsfiddle.net/BlackLabel/s52yx6d1/

Workaround: set xAxis.minRange: 1: https://jsfiddle.net/BlackLabel/Lhq6ms3c/

[marklofdahl]

Thanks! I can use the workaround until it is fixed.