[Octave-bug-tracker] [bug #39344] Correct ColorOrder over multiple plots

[Carl]

Follow-up Comment #3, bug #39344 (project octave):

A little more explanation:

The original code used persistent variables to keep track of the ColorOrder
and color_index within that order.  These variables were shared among all
plots so they would interfere with each other and an individual plot would not
follow its assigned ColorOrder.  Also, the persistent ColorOrder did not
always match with the actual ColorOrder assigned to the current plot.

The included patch reads the ColorOrder property for the current axes and
calculates the color_index (and style_index) based on the number of children
in that axes.  This is independent of any other plots and provides a
consistent and predictable result.


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