[Octave-bug-tracker] [bug #30461] legend should work for lines with different parents

[Ben Abbott]

Follow-up Comment #3, bug #30461 (project octave):

I'm not sure exactly what Matlab is doing. But there are some hints in the
axes properties and appdata.

>> plot (1:10)
>> legend ('hello world')
>> getappdata (hax(1))

ans = 

        LegendTempText: 177.01
        MWBYPASS_title: {[1x1 function_handle]}
       MWBYPASS_xlabel: {[1x1 function_handle]}
       MWBYPASS_ylabel: {[1x1 function_handle]}
       MWBYPASS_zlabel: {[1x1 function_handle]}
         NonDataObject: []
    PostDeserializeFcn: @legendpostdeserialize
         LegendOldSize: [66 16.8]

>> getappdata (hax(2))

ans = 

             PlotColorIndex: 2
         PlotLineStyleIndex: 1
         LegendColorbarText: [219.01 220.01]
    LegendColorbarInnerList: [1x1 scribe.legend]
    LegendColorbarOuterList: []
                   inLayout: []
      LegendComputePosCache: [0.13 0.11 0.775 0.815]
           LegendPeerHandle: 176.01

>> setdiff(fieldnames(get(hax(1))),fieldnames(get(hax(2)))

ans = 

    'EdgeColor'
    'Interpreter'
    'Location'
    'Orientation'
    'String'
    'TextColor'

I can do some experiments if you have some suggestions.

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