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1 ## Copyright (C) 1996, 1997 John W. Eaton |
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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} {} figure (@var{n}) |
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21 ## @deftypefnx {Function File} {} figure (@var{n}, @var{property}, @var{value}, @dots{}) |
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22 ## Set the current plot window to plot window @var{n}. If no arguments are |
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23 ## specified, the next available window number is chosen. |
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24 ## |
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25 ## Multiple property-value pairs may be specified for the figure, but they |
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26 ## must appear in pairs. |
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27 ## @end deftypefn |
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28 |
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29 ## Author: jwe, Bill Denney |
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30 |
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31 function h = figure (varargin) |
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32 |
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33 nargs = nargin; |
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34 |
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35 f = NaN; |
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36 |
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37 init_new_figure = false; |
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38 if (mod (nargs, 2) == 1) |
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39 tmp = varargin{1}; |
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40 if (ishandle (tmp) && strcmp (get (tmp, "type"), "figure")) |
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41 f = tmp; |
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42 varargin(1) = []; |
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43 nargs--; |
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44 elseif (isnumeric (tmp) && tmp > 0 && round (tmp) == tmp) |
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45 f = tmp; |
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46 init_new_figure = true; |
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47 varargin(1) = []; |
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48 nargs--; |
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49 else |
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50 error ("figure: expecting figure handle or figure number"); |
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51 endif |
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52 endif |
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53 |
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54 ## Check to see if we already have a figure on the screen. If we do, |
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55 ## then update it if it is different from the figure we are creating |
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56 ## or switching to. |
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57 cf = get (0, "currentfigure"); |
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58 if (! isempty (cf) && cf != 0) |
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59 if (isnan (f) || cf != f) |
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60 drawnow (); |
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61 endif |
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62 endif |
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63 |
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64 if (rem (nargs, 2) == 0) |
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65 if (isnan (f) || init_new_figure) |
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66 f = __go_figure__ (f, varargin{:}); |
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67 elseif (nargs > 0) |
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68 set (f, varargin{:}); |
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69 endif |
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70 set (0, "currentfigure", f); |
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71 else |
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72 print_usage (); |
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73 endif |
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74 |
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75 if (nargout > 0) |
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76 h = f; |
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77 endif |
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78 |
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79 endfunction |
