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annotate scripts/plot/__go_draw_figure__.m @ 9478:7e1e90837fef

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Avoid the flickering x11 window seen with rapid gnuplot updates.
author Ben Abbott <bpabbott@mac.com>
date Sun, 02 Aug 2009 16:52:12 -0400
parents d6c99b2ee941
children fea3d4868692
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1 ## Copyright (C) 2005, 2007, 2008, 2009 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} {} __go_draw_figure__ (@var{h}, @var{plot_stream}, @var{enhanced}, @var{mono})
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21 ## Undocumented internal function.
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22 ## @end deftypefn
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23
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24 ## Author: jwe
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25
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26 function __go_draw_figure__ (h, plot_stream, enhanced, mono, output_to_paper, implicit_margin)
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27
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28 if (nargin < 5)
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29 output_to_paper = false;
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30 elseif (nargin < 6)
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31 ## Gnuplot has implicit margins for some output. For example, for postscript
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32 ## the margin is 50pts. If not specified asssume 0.
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33 implicit_margin = 0;
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34 endif
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35
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36 if (nargin >= 4 && nargin <= 6)
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37 htype = get (h, "type");
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38 if (strcmp (htype, "figure"))
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39 ## When printing, set paperunits to inches and rely on a listener to convert
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40 ## the values for papersize and paperposition.
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41 if (output_to_paper)
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42 orig_paper_units = get (h, "paperunits");
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43 gpval_term = __gnuplot_get_var__ (h, "GPVAL_TERM");
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44 gpval_termoptions = __gnuplot_get_var__ (h, "GPVAL_TERMOPTIONS");
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45 unwind_protect
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46 set (h, "paperunits", "inches");
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47 paper_size = get (h, "papersize");
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48 paper_position = get (h, "paperposition");
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49 paper_position = paper_position ./ paper_size([1, 2, 1, 2]);
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50 implicit_margin = implicit_margin ./ paper_size;
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51 unwind_protect_cleanup
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52 set (h, "paperunits", orig_paper_units);
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53 end_unwind_protect
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54 if (strcmp (gpval_term, "postscript")
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55 && ! isempty (strfind (gpval_termoptions, "landscape")))
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56 ## This needed to obtain the expected result.
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57 implicit_margin(2) = -implicit_margin(2);
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58 endif
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59 else
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60 implicit_margin = implicit_margin * [1 1];
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61 endif
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62
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63 ## Get complete list of children.
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64 kids = allchild (h);
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65 nkids = length (kids);
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66
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67 if (nkids > 0)
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68 fputs (plot_stream, "\nreset;\n");
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69 fputs (plot_stream, "set autoscale keepfix;\n");
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70 fputs (plot_stream, "set origin 0, 0\n");
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71 fputs (plot_stream, "set size 1, 1\n");
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72 for i = 1:nkids
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73 type = get (kids(i), "type");
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74 switch (type)
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75 case "axes"
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76 ## Rely upon listener to convert axes position to "normalized" units.
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77 orig_axes_units = get (kids(i), "units");
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78 orig_axes_position = get (kids(i), "position");
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79 unwind_protect
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80 set (kids(i), "units", "normalized");
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81 if (output_to_paper)
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82 axes_position_on_page = orig_axes_position .* paper_position([3, 4, 3 ,4]);
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83 axes_position_on_page(1:2) = axes_position_on_page(1:2) + paper_position(1:2);
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84 set (kids(i), "position", axes_position_on_page);
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85 __go_draw_axes__ (kids(i), plot_stream, enhanced, mono, implicit_margin);
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86 else
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87 ## Return axes "units" and "position" back to their original values.
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88 __go_draw_axes__ (kids(i), plot_stream, enhanced, mono, implicit_margin);
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89 endif
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90 unwind_protect_cleanup
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91 set (kids(i), "units", orig_axes_units);
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92 set (kids(i), "position", orig_axes_position);
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93 end_unwind_protect
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94 otherwise
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95 error ("__go_draw_figure__: unknown object class, %s", type);
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96 endswitch
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97 endfor
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98 else
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99 fputs (plot_stream, "\nreset; clear;\n");
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100 fflush (plot_stream);
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101 endif
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102 else
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103 error ("__go_draw_figure__: expecting figure object, found `%s'",
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104 htype);
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105 endif
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106 else
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107 print_usage ();
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108 endif
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109
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110 endfunction
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111