[Octave-bug-tracker] [bug #57262] legend incorrect after some of plot objects have been deleted

[Rik]

Follow-up Comment #1, bug #57262 (project octave):

If I had to guess, this is likely because the handle for the graphics object
to the marker is not getting added to the variable hitem.  Either it should be
added to hitem, or an hggroup should be created which contains the line object
and marker object for the legend key so that only one handle needs to be
communicated in hitem.

The code begins at line 942 in legend.m:


switch (typ)
  case "line"
    persistent lprops = {"color", "linestyle", "linewidth"};
    persistent mprops = {"color", "marker", "markeredgecolor", ...
                         "markerfacecolor", "markersize"};

    ## Main line
    vals = get (hplt, lprops);
    hitem = __go_line__ (hl, [lprops; vals]{:});

    ## Additional line for the marker
    vals = get (hplt, mprops);
    hmarker = __go_line__ (hl, "handlevisibility", "off", ...
                               "xdata", 0, "ydata", 0, [mprops; vals]{:});
    update_marker_cb (hmarker);

  case {"patch", "surface"}
    persistent pprops = {"edgecolor", "facecolor", "cdata", ...
                         "linestyle", "linewidth", ...
                         "marker", "markeredgecolor", ...
                         "markerfacecolor", "markersize"};

    vals = get (hplt, pprops);

    hitem = __go_patch__ (hl, [pprops; vals]{:});

endswitch

htxt = __go_text__ (hl, "string", str, [txtprops(:)'; txtvals(:)']{:});
set (base_hplt, "displayname", str);

addproperty ("peer_object", htxt, "double", base_hplt);
addproperty ("peer_object", hitem, "double", base_hplt);




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