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annotate scripts/plot/refreshdata.m @ 14335:ce2b59a6d0e5

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maint: periodic merge of stable to default.
author Rik <octave@nomad.inbox5.com>
date Sun, 05 Feb 2012 15:32:24 -0800
parents 4506eade9f04 4d917a6a858b
children f3d52523cde1
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1 ## Copyright (C) 2008-2012 David Bateman
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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} {} refreshdata ()
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21 ## @deftypefnx {Function File} {} refreshdata (@var{h})
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22 ## @deftypefnx {Function File} {} refreshdata (@var{h}, @var{workspace})
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23 ## Evaluate any @samp{datasource} properties of the current figure and update
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24 ## the plot if the corresponding data has changed. If called with one or more
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25 ## arguments @var{h} is a scalar or array of figure handles to refresh. The
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26 ## optional second argument @var{workspace} can take the following values.
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27 ##
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28 ## @table @asis
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29 ## @item "base"
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30 ## Evaluate the datasource properties in the base workspace. (default).
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31 ##
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32 ## @item "caller"
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33 ## Evaluate the datasource properties in the workspace of the function
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34 ## that called @code{refreshdata}.
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35 ## @end table
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36 ##
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37 ## An example of the use of @code{refreshdata} is:
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38 ##
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39 ## @example
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40 ## @group
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41 ## x = 0:0.1:10;
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42 ## y = sin (x);
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43 ## plot (x, y, "ydatasource", "y");
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44 ## for i = 1 : 100
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45 ## pause (0.1);
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46 ## y = sin (x + 0.1*i);
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47 ## refreshdata ();
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48 ## endfor
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49 ## @end group
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50 ## @end example
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51 ## @end deftypefn
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52
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53 function refreshdata (h, workspace)
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54
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55 if (nargin == 0)
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56 h = gcf ();
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57 workspace = "base";
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58 else
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59 if (iscell (h))
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60 h = [h{:}];
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61 endif
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62 if (!all (ishandle (h)) || !all (strcmp (get (h, "type"), "figure")))
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63 error ("refreshdata: expecting a list of figure handles");
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64 endif
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65 if (nargin < 2)
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66 workspace = "base";
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67 else
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68 if ( !ischar (workspace)
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69 || !(strcmpi (workspace, "base")
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70 || strcmpi (workspace, "caller")))
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71 error ("refreshdata: expecting WORKSPACE to be \"base\" or ""caller\"");
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72 else
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73 workspace = tolower (workspace);
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74 endif
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75 endif
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76 endif
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77
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78 h = findall (h);
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79 objs = [];
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80 props = {};
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81
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82 for i = 1 : numel (h)
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83 obj = get (h (i));
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84 fldnames = fieldnames (obj);
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85 m = regexpi (fieldnames(obj), '^.+datasource$', "match");
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86 idx = ! cellfun ("isempty", m);
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87 if (any (idx))
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88 tmp = m(idx);
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89 props = [props; {vertcat(tmp{:})}];
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90 objs = [objs ; h(i)];
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91 endif
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92 endfor
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93
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94 for i = 1 : length (objs)
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95 for j = 1 : length (props {i})
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96 expr = get (objs(i), props{i}{j});
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97 if (!isempty (expr))
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98 val = evalin (workspace, expr);
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99 prop = props{i}{j}(1:end-6);
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100 if (! isequal (get (objs(i), prop), val))
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101 set (objs(i), props{i}{j}(1:end-6), val);
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102 endif
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103 endif
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104 endfor
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105 endfor
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106
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107 endfunction
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108
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109
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110 %!demo
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111 %! clf;
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112 %! x = 0:0.1:10;
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113 %! y = sin (x);
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114 %! plot (x, y, 'ydatasource', 'y');
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115 %! for i = 1 : 100
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116 %! pause (0.1);
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117 %! y = sin (x + 0.1 * i);
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118 %! refreshdata (gcf (), 'caller');
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119 %! end
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120