1 ## Copyright (C) 2008-2012 Michael Goffioul
3 ## This file is part of Octave.
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
20 ## @deftypefn {Function File} {@var{h} =} gcbo ()
21 ## @deftypefnx {Function File} {[@var{h}, @var{fig}] =} gcbo ()
22 ## Return a handle to the object whose callback is currently
23 ## executing. If no callback is executing, this function returns the
24 ## empty matrix. This handle is obtained from the root object property
27 ## Additionally return the handle of the figure containing the
28 ## object whose callback is currently executing. If no callback is
29 ## executing, the second output is also set to the empty matrix.
31 ##@seealso{gcf, gca, gcbf}
34 function [h, fig] = gcbo ()
36 h = get (0, "callbackobject");
39 if (! isempty (h) && nargout > 1)
40 fig = ancestor (h, "figure");
46 %! assert (isempty (gcbo ));