[Octave-bug-tracker] [bug #57303] legend() fails if parent of axes is not a figure

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?57303>

                 Summary: legend() fails if parent of axes is not a figure
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Tue 26 Nov 2019 09:17:01 AM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

I'm working on a graphical user-interface and therefore I've got a main figure
with buttons, tables, ... and also panels. I've put a plot inside one of those
panels but get an error when I try to create a legend for this plot. 

After some digging in legend.m, I found that at this point

## Also inherit colormap from axes if it is different than figure
          cax_cmap = get (cax, "colormap");
          display(cax_cmap)
          if (! isequal (cax_cmap, get (hpar, "colormap")))
            set (hlegend, "colormap", cax_cmap);
          endif

it is assumed that _hpar_ has a property called colormap. In my case, _hpar_
is not the main figure but the panel in which the plot is nested. (I'm not
sure why _hpar_ is called at all - isn't it safe to assume that the current
axes are part of the current figure?)

I've attached an example. Thanks in advance!



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File Attachments:


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Date: Tue 26 Nov 2019 09:17:01 AM UTC  Name: bugreport.m  Size: 110B   By:
None

<http://savannah.gnu.org/bugs/download.php?file_id=47932>

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