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maint: Merge stable to default.
author John W. Eaton <jwe@octave.org>
date Tue, 28 Dec 2021 18:59:33 -0500
parents eff73c13fcf3 796f54d4ddbf
children e88a07dec498
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2007-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_graphics_toolkit_h)
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27 #define octave_graphics_toolkit_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <map>
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32 #include <memory>
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33 #include <string>
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34
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35 #include "dMatrix.h"
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36
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37 #include "Cell.h"
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38 #include "error.h"
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39 #include "graphics-handle.h"
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40
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41 namespace octave
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42 {
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43 class graphics_object;
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44 class graphics_toolkit;
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45
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46 class base_graphics_toolkit
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47 {
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48 public:
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49
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50 friend class graphics_toolkit;
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51
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52 public:
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53
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54 base_graphics_toolkit (const std::string& nm)
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55 : m_name (nm)
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56 { }
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57
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58 virtual ~base_graphics_toolkit (void) = default;
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59
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60 std::string get_name (void) const
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61 {
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62 return m_name;
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63 }
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64
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65 virtual bool is_valid (void) const
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66 {
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67 return false;
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68 }
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69
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70 virtual void redraw_figure (const graphics_object&) const
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71 {
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72 gripe_if_tkit_invalid ("redraw_figure");
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73 }
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74
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75 virtual void show_figure (const graphics_object&) const
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76 {
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77 gripe_if_tkit_invalid ("show_figure");
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78 }
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79
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80 virtual void print_figure (const graphics_object&, const std::string&,
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81 const std::string&,
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82 const std::string& = "") const
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83 {
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84 gripe_if_tkit_invalid ("print_figure");
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85 }
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86
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87 virtual uint8NDArray get_pixels (const graphics_object&) const
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88 {
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89 gripe_if_tkit_invalid ("get_pixels");
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90 return uint8NDArray ();
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91 }
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92
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93 virtual Matrix get_canvas_size (const graphics_handle&) const
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94 {
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95 gripe_if_tkit_invalid ("get_canvas_size");
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96 return Matrix (1, 2, 0.0);
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97 }
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98
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99 virtual double get_screen_resolution (void) const
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100 {
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101 gripe_if_tkit_invalid ("get_screen_resolution");
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102 return 72.0;
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103 }
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104
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105 virtual Matrix get_screen_size (void) const
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106 {
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107 gripe_if_tkit_invalid ("get_screen_size");
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108 return Matrix (1, 2, 0.0);
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109 }
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110
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111 virtual Matrix get_text_extent (const graphics_object&) const
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112 {
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113 gripe_if_tkit_invalid ("get_text_extent");
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114 return Matrix ();
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115 }
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116
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117 // Callback function executed when the given graphics object
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118 // changes. This allows the graphics toolkit to act on property
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119 // changes if needed.
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120 virtual void update (const graphics_object&, int)
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121 {
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122 gripe_if_tkit_invalid ("base_graphics_toolkit::update");
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123 }
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124
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125 void update (const graphics_handle&, int);
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126
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127 // Callback function executed when the given graphics object is
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128 // created. This allows the graphics toolkit to do toolkit-specific
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129 // initializations for a newly created object.
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130 virtual bool initialize (const graphics_object&)
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131 {
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132 gripe_if_tkit_invalid ("base_graphics_toolkit::initialize");
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133 return false;
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134 }
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135
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136 bool initialize (const graphics_handle&);
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137
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138 // Callback function executed just prior to deleting the given
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139 // graphics object. This allows the graphics toolkit to perform
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140 // toolkit-specific cleanup operations before an object is deleted.
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141 virtual void finalize (const graphics_object&)
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142 {
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143 gripe_if_tkit_invalid ("base_graphics_toolkit::finalize");
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144 }
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145
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146 void finalize (const graphics_handle&);
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147
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148 // Close the graphics toolkit.
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149 virtual void close (void)
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150 {
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151 gripe_if_tkit_invalid ("base_graphics_toolkit::close");
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152 }
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153
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154 private:
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155
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156 std::string m_name;
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157
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158 private:
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159
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160 void gripe_if_tkit_invalid (const std::string& fname) const
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161 {
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162 if (! is_valid ())
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163 error ("%s: invalid graphics toolkit", fname.c_str ());
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164 }
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165 };
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166
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167 class graphics_toolkit
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168 {
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169 public:
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170 graphics_toolkit (const std::string& name = "unknown")
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171 : m_rep (new base_graphics_toolkit (name))
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172 { }
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173
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174 // NEW_REP must be dynamically allocated.
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175 graphics_toolkit (base_graphics_toolkit *new_rep)
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176 : m_rep (std::shared_ptr<base_graphics_toolkit> (new_rep))
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177 {
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178 if (! m_rep)
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179 error ("invalid graphics_toolkit!");
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180 }
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181
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182 graphics_toolkit (const graphics_toolkit& b) = default;
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183
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184 graphics_toolkit& operator = (const graphics_toolkit& b) = default;
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185
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186 ~graphics_toolkit (void) = default;
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187
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188 operator bool (void) const
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189 {
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190 return m_rep->is_valid ();
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191 }
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192
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193 std::string get_name (void) const
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194 {
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195 return m_rep->get_name ();
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196 }
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197
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198 void redraw_figure (const graphics_object& go) const
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199 {
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200 m_rep->redraw_figure (go);
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201 }
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202
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203 void show_figure (const graphics_object& go) const
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204 {
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205 m_rep->show_figure (go);
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206 }
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207
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208 void print_figure (const graphics_object& go, const std::string& term,
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209 const std::string& file,
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210 const std::string& debug_file = "") const
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211 {
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212 m_rep->print_figure (go, term, file, debug_file);
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213 }
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214
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215 uint8NDArray get_pixels (const graphics_object& go) const
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216 {
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217 return m_rep->get_pixels (go);
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218 }
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219
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220 Matrix get_canvas_size (const graphics_handle& fh) const
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221 {
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222 return m_rep->get_canvas_size (fh);
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223 }
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224
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225 double get_screen_resolution (void) const
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226 {
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227 return m_rep->get_screen_resolution ();
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228 }
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229
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230 Matrix get_screen_size (void) const
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231 {
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232 return m_rep->get_screen_size ();
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233 }
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234
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235 Matrix get_text_extent (const graphics_object& go) const
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236 {
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237 return m_rep->get_text_extent (go);
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238 }
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239
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240 // Notifies graphics toolkit that object't property has changed.
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241 void update (const graphics_object& go, int id)
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242 {
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243 m_rep->update (go, id);
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244 }
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245
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246 void update (const graphics_handle& h, int id)
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247 {
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248 m_rep->update (h, id);
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249 }
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250
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251 // Notifies graphics toolkit that new object was created.
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252 bool initialize (const graphics_object& go)
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253 {
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254 return m_rep->initialize (go);
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255 }
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256
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257 bool initialize (const graphics_handle& h)
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258 {
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259 return m_rep->initialize (h);
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260 }
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261
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262 // Notifies graphics toolkit that object was destroyed.
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263 // This is called only for explicitly deleted object.
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264 // Children are deleted implicitly and graphics toolkit isn't notified.
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265 void finalize (const graphics_object& go)
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266 {
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267 m_rep->finalize (go);
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268 }
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269
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270 void finalize (const graphics_handle& h)
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271 {
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272 m_rep->finalize (h);
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273 }
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274
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275 // Close the graphics toolkit.
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276 void close (void)
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277 {
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278 m_rep->close ();
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279 }
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280
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281 private:
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282
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283 std::shared_ptr<base_graphics_toolkit> m_rep;
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284 };
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285 }
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286
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287 #endif