[Octave-bug-tracker] [bug #64143] quiver: arrowheads visible if setting name-value property after linestyle

[Nicholas Jankowski]

Follow-up Comment #1, bug #64143 (project octave):

looks like quiver correctly processes the "-o" linespec at the front of
processing:


    if (have_line_spec)
      if (! isempty (linespec.marker) && ! strcmp (linespec.marker, "none"))
        ls = "none";
      endif
    endif


setting arrowhead linestyle no None.  But at the end of quiver style
processing, remaining properties are caught by   


if (! isempty (args))
  set (hg, args{:});
endif


which applies to all plot lines.  I do note that hg is a hggroup with the
three quiver elements as children (basemarker, arrowbody, arrowhead) and
nothing else in the plot. might be able to just split that into three separate
set statements with a conditional on the arrowhead, if it doesn't break
anything else. or maybe better could just conditionally set the arrowhead
linestyle back to none after applying all other properties, if that doesn't
cause any odd persistent effects. 



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