Mercurial > hg > octave-nkf
annotate scripts/plot/gcf.m @ 19669:c2031ad6dbe7
Fix octave header includes in audiodevinfo
* audiodevinfo.cc: change includes to use local octave headers
author | Vytautas Jančauskas <unaudio@gmail.com> |
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date | Wed, 11 Sep 2013 21:32:14 +0300 |
parents | 4f1d827e1302 |
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rev | line source |
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maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2005-2012 John W. Eaton |
6257 | 2 ## |
3 ## This file is part of Octave. | |
4 ## | |
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 | |
7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
8 ## your option) any later version. | |
6257 | 9 ## |
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. | |
14 ## | |
15 ## You should have received a copy of the GNU General Public License | |
7016 | 16 ## along with Octave; see the file COPYING. If not, see |
17 ## <http://www.gnu.org/licenses/>. | |
6257 | 18 |
19 ## -*- texinfo -*- | |
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20 ## @deftypefn {Function File} {@var{h} =} gcf () |
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21 ## Return a handle to the current figure. |
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22 ## |
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23 ## The current figure is the default target for graphics output. If multiple |
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24 ## figures exist, @code{gcf} returns the last created figure or the last figure |
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25 ## that was clicked on with the mouse. |
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26 ## |
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27 ## If a current figure does not exist, create one and return its handle. The |
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28 ## handle may then be used to examine or set properties of the figure. For |
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29 ## example, |
6895 | 30 ## |
31 ## @example | |
32 ## @group | |
33 ## fplot (@@sin, [-10, 10]); | |
34 ## fig = gcf (); | |
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35 ## set (fig, "numbertitle", "off", "name", "sin plot") |
6895 | 36 ## @end group |
37 ## @end example | |
38 ## | |
39 ## @noindent | |
40 ## plots a sine wave, finds the handle of the current figure, and then | |
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41 ## renames the figure window to describe the contents. |
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42 ## |
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43 ## Note: To find the current figure without creating a new one if it does not |
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44 ## exist, query the @qcode{"CurrentFigure"} property of the root graphics |
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45 ## object. |
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46 ## |
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47 ## @example |
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48 ## get (0, "currentfigure"); |
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49 ## @end example |
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50 ## |
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51 ## @seealso{gca, gco, gcbf, gcbo, get, set} |
6257 | 52 ## @end deftypefn |
53 | |
54 ## Author: jwe, Bill Denney | |
55 | |
56 function h = gcf () | |
57 | |
58 if (nargin == 0) | |
59 h = get (0, "currentfigure"); | |
60 if (isempty (h) || h == 0) | |
61 ## We only have a root figure object, so create a new figure | |
62 ## object and make it the current figure. | |
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63 h = figure (); |
6257 | 64 endif |
65 else | |
66 print_usage (); | |
67 endif | |
68 | |
69 endfunction | |
13096 | 70 |
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71 |
13096 | 72 %!test |
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73 %! hf = figure ("visible", "off"); |
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74 %! unwind_protect |
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75 %! assert (gcf, hf); |
13096 | 76 %! unwind_protect_cleanup |
77 %! close (hf); | |
78 %! end_unwind_protect | |
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79 |