highslide-software/highcharts.com — pull request #1802 by es128 (2013-05-04 21:22:11+00:00)
Title: Steady alternateGridColor

fixes #1801

Original behavior is unchanged in cases where the tickPositions are not calculated dynamically.

When this change does apply, instead of determining even/odd position among currently visible ticks, it considers its position relative to the max value of the axis. This also applies a band from the minimum visible position to the first tick when appropriate.