--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/plot/guihandles.m	Thu Oct 13 23:01:44 2011 +0100
@@ -0,0 +1,70 @@
+## Copyright (C) 2011 Michael Goffioul
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or (at
+## your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn  {Function File} {@var{hdata} =} guihandles (@var{handle})
+## @deftypefnx {Function File} {@var{hdata} =} guihandles
+## @end deftypefn
+
+## Author: goffioul
+
+function hdata = guihandles (varargin)
+
+  hdata = [];
+
+  if (nargin == 0 || nargin == 1)
+    if (nargin == 1)
+      h = varargin{1};
+      if (ishandle (h))
+        h = ancestor (h, "figure");
+        if (isempty (h))
+          error ("no ancestor figure found");
+        endif
+      else
+        error ("invalid object handle");
+      endif
+    else
+      h = gcf ();
+    endif
+    hdata = __make_guihandles_struct__ (h, hdata);
+  else
+    print_usage ();
+  endif
+
+endfunction
+
+function hdata = __make_guihandles_struct__ (h, hdata)
+
+  tag = get (h, "tag");
+  if (! isempty (tag))
+    if (isfield (hdata, tag))
+      hdata.(tag) = [hdata.(tag), h];
+    else
+      try
+        hdata.(tag) = h;
+      catch
+      end_try_catch
+    endif
+  endif
+
+  kids = allchild (h);
+  for i = 1 : length (kids)
+    hdata = __make_guihandles_struct__ (kids(i), hdata);
+  endfor
+
+endfunction