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1 ## Copyright (C) 2008 Michael Goffioul |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 3 of the License, or (at |
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8 ## your option) any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## -*- texinfo -*- |
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20 ## @deftypefn {Function File} {@var{h} =} gcbo () |
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21 ## @deftypefnx {Function File} {[@var{h}, @var{fig}] =} gcbo () |
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22 ## Return a handle to the object whose callback is currently |
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23 ## executing. If no callback is executing, this function returns the |
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24 ## empty matrix. This handle is obtained from the root object property |
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25 ## "CallbackObject". |
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26 ## |
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27 ## Additionally return the handle of the figure containing the |
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28 ## object whose callback is currently executing. If no callback is |
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29 ## executing, the second output is also set to the empty matrix. |
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30 ## |
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31 ##@seealso{gcf, gca, gcbf} |
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32 ##@end deftypefn |
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33 |
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34 function [h, fig] = gcbo () |
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35 |
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36 h = get (0, "callbackobject"); |
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37 fig = []; |
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38 |
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39 if (! isempty (h) && nargout > 1) |
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40 fig = ancestor (h, "figure"); |
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41 endif |
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42 |
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43 endfunction |
