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## Copyright (C) 2012-2013 pdiribarne
##
## This file is part of Octave.
##
## This program 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{hnew} =} copyobj (@var{horig})
## @deftypefnx {Function File} {@var{hnew} =} copyobj (@var{horig}, @var{hparent})
## Construct a copy of the graphic object associated with handle @var{horig}
## and return a handle @var{hnew} to the new object.
##
## If a parent handle @var{hparent} (root, figure, axes, or hggroup) is
## specified, the copied object will be created as a child of @var{hparent}.
## @seealso{struct2hdl, hdl2struct, findobj}
## @end deftypefn
## Author: pdiribarne <pdiribarne@new-host.home>
## Created: 2012-04-01
function hnew = copyobj (horig, hparent = 0)
partypes = {"root", "figure", "axes", "hggroup"};
othertypes = {"line", "patch", "surface", "image", "text"};
alltypes = [partypes othertypes];
if (! ishandle (horig) || nargin > 2)
print_usage ();
elseif (! ishandle (hparent))
hparent = figure (fix (hparent));
elseif (! any (strcmpi (get (hparent).type, partypes)))
print_usage ();
endif
## current figure and axes
cf = gcf ();
ca = gca ();
## compatibility of input handles
kididx = find (strcmp (alltypes, get (horig).type));
paridx = find (strcmp (alltypes, get (hparent).type));
if (kididx <= paridx)
error ("copyobj: %s object can't be children to %s.",
alltypes{kididx}, alltypes{paridx});
elseif (nargin == 1)
str = hdl2struct (horig);
hnew = struct2hdl (str);
else
str = hdl2struct (horig);
hnew = struct2hdl (str, hparent);
endif
## reset current figure (and eventually axes) to original
set (0, "currentfigure", cf);
if (get (hnew, "parent") == cf)
set (cf, "currentaxes", ca)
endif
endfunction
%!demo
%! hdl = figure (1234);
%! clf;
%! hold on;
%! x = 1:10;
%! y = x.^2;
%! dy = 2 * (.2 * x);
%! y2 = (x - 3).^2;
%! hg = errorbar (x, y, dy,'#~');
%! set (hg, 'marker', '^', 'markerfacecolor', rand (1,3));
%! plot (x, y2, 'ok-');
%! legend ('errorbar', 'line');
%! hnew = copyobj (hdl);
%!#demo
%! ## FIXME: This demo fails for an obscure reason.
%! ## It appears that there is something wrong with Octave code for patches.
%! ## This demo must remain commented out until patch() has been reworked.
%! unwind_protect
%! hdl = figure (1234);
%! clf;
%! subplot (2,2,1);
%! hold on;
%! contourf (rand (10, 10));
%! colorbar ();
%! subplot (2,2,2);
%! quiver (rand (10, 10), rand (10, 10));
%! subplot (2,2,3);
%! colormap (jet (64));
%! hold on;
%! sombrero ();
%! colorbar ('peer', gca, 'NorthOutside');
%! subplot (2,2,4);
%! imagesc (rand (30, 30));
%! text (15, 15, 'Rotated text', ...
%! 'HorizontAlalignment', 'Center', 'Rotation', 30);
%! hnew = copyobj (hdl);
%! unwind_protect_cleanup
%! close all;
%! end_unwind_protect
%!testif HAVE_MAGICK
%! toolkit = graphics_toolkit ();
%! graphics_toolkit ("gnuplot");
%! unwind_protect
%! h1 = figure ("visible", "off");
%! x = 0:0.1:2*pi;
%! y1 = sin (x);
%! y2 = exp (x - 1);
%! ax = plotyy (x,y1, x-1,y2, @plot, @semilogy);
%! xlabel ("X");
%! ylabel (ax(1), "Axis 1");
%! ylabel (ax(2), "Axis 2");
%! axes (ax(1));
%! text (0.5, 0.5, "Left Axis", ...
%! "color", [0 0 1], "horizontalalignment", "center");
%! axes (ax(2));
%! text (4.5, 80, "Right Axis", ...
%! "color", [0 0.5 0], "horizontalalignment", "center");
%! s1 = hdl2struct (h1);
%! h2 = struct2hdl (s1);
%! s2 = hdl2struct (h2);
%! png1 = strcat (tmpnam (), ".png");
%! png2 = strcat (tmpnam (), ".png");
%! unwind_protect
%! print (h1, png1);
%! [img1, map1, alpha1] = imread (png1);
%! print (h2, png2);
%! [img2, map2, alpha2] = imread (png2);
%! unwind_protect_cleanup
%! unlink (png1);
%! unlink (png2);
%! end_unwind_protect
%! assert (img1, img2);
%! assert (map1, map2);
%! assert (alpha1, alpha2);
%! unwind_protect_cleanup
%! close (h1);
%! close (h2);
%! graphics_toolkit (toolkit);
%! end_unwind_protect
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