Mercurial > octave
annotate libinterp/dldfcn/__init_gnuplot__.cc @ 19646:408361a8c72f
Don't register gnuplot toolkit if gnuplot is not available (bug #35391)
* __init_gnuplot__.cc (F__have_gnuplot__, have_gnuplot_binary): New functions
to test for existence of gnuplot external program. (PKG_ADD): Don't register
gnuplot toolkit unless gnuplot binary is available. (F__init_gnuplot): Error
if gnuplot binary is not available.
* graphics.cc (gtk_manager::do_get_toolkit): Provide better error message if
no graphics toolkits are available.
author | Mike Miller <mtmiller@ieee.org> |
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date | Sat, 31 Jan 2015 02:42:15 -0500 |
parents | 175b392e91fe |
children | 830c8457295a |
rev | line source |
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1 /* |
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2 |
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3 Copyright (C) 2007-2013 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 3 of the License, or (at your |
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10 option) any later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, see |
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19 <http://www.gnu.org/licenses/>. |
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20 |
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21 */ |
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22 |
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23 /* |
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24 |
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25 To initialize: |
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26 |
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27 graphics_toolkit ("gnuplot"); |
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28 plot (randn (1e3, 1)); |
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29 |
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30 */ |
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31 |
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32 #ifdef HAVE_CONFIG_H |
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33 #include <config.h> |
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34 #endif |
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35 |
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36 #include "builtins.h" |
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37 #include "defun-dld.h" |
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38 #include "error.h" |
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39 #include "file-stat.h" |
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40 #include "graphics.h" |
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41 #include "oct-env.h" |
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42 #include "parse.h" |
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43 #include "utils.h" |
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44 #include "variables.h" |
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45 |
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46 // PKG_ADD: if (__have_gnuplot__ ()) register_graphics_toolkit ("gnuplot"); endif |
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47 |
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48 static bool toolkit_loaded = false; |
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49 |
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50 class gnuplot_graphics_toolkit : public base_graphics_toolkit |
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51 { |
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52 public: |
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53 gnuplot_graphics_toolkit (void) |
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54 : base_graphics_toolkit ("gnuplot") { } |
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55 |
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56 ~gnuplot_graphics_toolkit (void) { } |
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57 |
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58 bool is_valid (void) const { return true; } |
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59 |
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60 bool initialize (const graphics_object& go) |
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61 { |
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62 return go.isa ("figure"); |
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63 } |
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64 |
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65 void finalize (const graphics_object& go) |
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66 { |
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67 if (go.isa ("figure")) |
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68 { |
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69 const figure::properties& props = |
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70 dynamic_cast<const figure::properties&> (go.get_properties ()); |
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71 |
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72 send_quit (props.get___plot_stream__ ()); |
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73 } |
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74 } |
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75 |
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76 void update (const graphics_object& go, int id) |
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77 { |
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78 if (go.isa ("figure")) |
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79 { |
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80 graphics_object obj (go); |
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81 |
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82 figure::properties& props = |
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83 dynamic_cast<figure::properties&> (obj.get_properties ()); |
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84 |
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85 switch (id) |
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86 { |
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87 case base_properties::ID_VISIBLE: |
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88 if (! props.is_visible ()) |
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89 { |
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90 send_quit (props.get___plot_stream__ ()); |
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91 props.set___plot_stream__ (Matrix ()); |
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92 props.set___enhanced__ (false); |
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93 } |
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94 break; |
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95 } |
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96 } |
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97 } |
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98 |
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99 void redraw_figure (const graphics_object& go) const |
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100 { |
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101 octave_value_list args; |
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102 args(0) = go.get_handle ().as_octave_value (); |
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103 feval ("__gnuplot_drawnow__", args); |
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104 } |
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105 |
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106 void print_figure (const graphics_object& go, const std::string& term, |
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107 const std::string& file, bool mono, |
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108 const std::string& debug_file) const |
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109 { |
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110 octave_value_list args; |
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111 if (! debug_file.empty ()) |
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112 args(4) = debug_file; |
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113 args(3) = mono; |
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114 args(2) = file; |
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115 args(1) = term; |
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116 args(0) = go.get_handle ().as_octave_value (); |
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117 feval ("__gnuplot_drawnow__", args); |
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118 } |
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119 |
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120 Matrix get_canvas_size (const graphics_handle&) const |
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121 { |
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122 Matrix sz (1, 2, 0.0); |
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123 return sz; |
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124 } |
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125 |
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126 double get_screen_resolution (void) const |
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127 { return 72.0; } |
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128 |
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129 Matrix get_screen_size (void) const |
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130 { return Matrix (1, 2, 0.0); } |
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131 |
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132 void close (void) |
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133 { |
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134 if (toolkit_loaded) |
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135 { |
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136 munlock ("__init_gnuplot__"); |
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137 |
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138 gtk_manager::unload_toolkit ("gnuplot"); |
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139 |
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140 toolkit_loaded = false; |
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141 } |
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142 } |
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143 |
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144 private: |
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145 |
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146 void send_quit (const octave_value& pstream) const |
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147 { |
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148 if (! pstream.is_empty ()) |
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149 { |
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150 octave_value_list args; |
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151 Matrix fids = pstream.matrix_value (); |
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152 |
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153 if (! error_state) |
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154 { |
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155 Ffputs (ovl (fids(0), "\nquit;\n")); |
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156 |
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157 Ffflush (ovl (fids(0))); |
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158 Fpclose (ovl (fids(0))); |
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159 |
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160 if (fids.numel () > 1) |
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161 { |
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162 Fpclose (ovl (fids(1))); |
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163 |
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164 if (fids.numel () > 2) |
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165 Fwaitpid (ovl (fids(2))); |
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166 } |
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167 } |
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168 } |
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169 } |
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170 }; |
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171 |
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172 static bool |
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173 have_gnuplot_binary (void) |
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174 { |
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175 octave_value_list tmp = feval ("gnuplot_binary", octave_value_list ()); |
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176 std::string gnuplot_binary = tmp(0).string_value (); |
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177 |
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178 std::string path = octave_env::getenv ("PATH"); |
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179 |
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180 string_vector args (gnuplot_binary); |
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181 std::string gnuplot_path = search_path_for_file (path, args); |
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182 |
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183 file_stat fs (gnuplot_path); |
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184 |
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185 return fs.exists (); |
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186 } |
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187 |
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188 // Initialize the gnuplot graphics toolkit. |
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189 |
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190 DEFUN_DLD (__init_gnuplot__, , , "") |
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191 { |
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192 octave_value retval; |
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193 |
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194 if (! have_gnuplot_binary ()) |
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195 error ("__init_gnuplot__: the gnuplot program is not available, see 'gnuplot_binary'"); |
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196 else if (! toolkit_loaded) |
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197 { |
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198 mlock (); |
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199 |
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200 graphics_toolkit tk (new gnuplot_graphics_toolkit ()); |
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201 gtk_manager::load_toolkit (tk); |
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202 |
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203 toolkit_loaded = true; |
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204 } |
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205 |
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206 return retval; |
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207 } |
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208 |
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209 DEFUN_DLD (__have_gnuplot__, , , |
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210 "-*- texinfo -*-\n\ |
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211 @deftypefn {Loadable Function} {@var{gnuplot_available} =} __have_gnuplot__ ()\n\ |
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212 Undocumented internal function.\n\ |
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213 @end deftypefn") |
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214 { |
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215 octave_value retval; |
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216 |
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217 retval = have_gnuplot_binary (); |
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218 |
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219 return retval; |
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220 } |
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221 |