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annotate libgui/src/octave-adapter/octave-link.h @ 16350:d4b6ad43bc87

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use direct callbacks instead to handle history and workspace list updates * history-docwidget.h, history-dockwidget.cc (history_dock_widget::_update_event_enabled): Delete data member and all uses. * history-dockwidget.cc (history_dock_widget::construct): Don't install a timer. (history_dock_widget::update_history_callback): Now public. * workspace-model.cc (workspace_model::workspace_model): Don't install a timer. (workspace_model::_update_event_enabled): Delete data member and all uses. (workspace_model::update_workspace_callback): Now public. * workspace-view (workspace_view::model_changed): call workspace_model::update_workspace_callback. * main-window.h, main-window.cc (main_window::update_workspace, main_window::update_history): New functions. (main_window::construct): Connect them to corresponding signals. * octave-event-listener.h (octave_event_listener::update_workspace, octave_event_listener::update_history): New virtual functions. * octave-link.h, octave-link.cc (octave_link::update_workspace, octave_link::update_history, octave_link::do_update_workspace, octave_link::do_update_history, octave_link::post_input_event_hook_fcn, octave_link::do_post_input_event_hook_fcn): New functions. * octave-main-thread.cc (pre_input_event_hook_fcn, post_input_event_hook_fcn): New functions. (octave_main_thread::run): Install pre- and post- input event callback functions. * octave-qt-event-listener.h, octave-qt-event-listener.cc (octave_qt_event_listener::update_workspace octave_qt_event_listener::update_history): New functions. (octave_qt_event_listener::update_workspace_signal, octave_qt_event_listener::update_history_signal): New signals.
author John W. Eaton <jwe@octave.org>
date Thu, 21 Mar 2013 02:28:48 -0400
parents 7f423c6111c6
children 8430ea8c1594
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1 /*
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2
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3 Copyright (C) 2011-2012 Jacob Dawid
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4 Copyright (C) 2011-2012 John P. Swensen
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #ifndef OCTAVELINK_H
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25 #define OCTAVELINK_H
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27 #include <string>
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28
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29 class octave_mutex;
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30
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31 #include "event-queue.h"
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32
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33 #include "octave-main-thread.h"
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34 #include "octave-event-listener.h"
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35
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36 // \class OctaveLink
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37 // \brief Provides threadsafe access to octave.
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38 // \author Jacob Dawid
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39 //
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40 // This class is a wrapper around octave and provides thread safety by
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41 // buffering access operations to octave and executing them in the
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42 // readline event hook, which lives in the octave thread.
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43
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44 class octave_link
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45 {
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46 protected:
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47
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48 octave_link (void);
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49
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50 public:
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51
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52 ~octave_link (void) { }
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53
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54 static void launch_octave (void)
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55 {
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56 if (instance_ok ())
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57 instance->do_launch_octave ();
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58 }
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59
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60 static void register_event_listener (octave_event_listener *el)
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61 {
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62 if (instance_ok ())
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63 instance->do_register_event_listener (el);
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64 }
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65
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66 static void generate_events (void)
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67 {
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68 if (instance_ok ())
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69 instance->do_generate_events ();
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70 }
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71
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72 static void process_events (void)
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73 {
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74 if (instance_ok ())
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75 instance->do_process_events ();
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76 }
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77
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78 template <class T>
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79 static void post_event (T *obj, void (T::*method) (void))
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80 {
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81 if (instance_ok ())
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82 instance->do_post_event (obj, method);
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83 }
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84
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85 template <class T, class A>
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86 static void post_event (T *obj, void (T::*method) (A), A arg)
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87 {
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88 if (instance_ok ())
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89 instance->do_post_event (obj, method, arg);
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90 }
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91
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92 template <class T, class A>
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93 static void post_event (T *obj, void (T::*method) (const A&), const A& arg)
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94 {
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95 if (instance_ok ())
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96 instance->do_post_event (obj, method, arg);
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97 }
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98
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99 static void about_to_exit (void)
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100 {
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101 if (instance_ok ())
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102 instance->do_about_to_exit ();
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103 }
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104
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105 static void entered_readline_hook (void)
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106 {
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107 if (instance_ok ())
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108 instance->do_entered_readline_hook ();
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109 }
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110
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111 static void finished_readline_hook (void)
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112 {
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113 if (instance_ok ())
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114 instance->do_finished_readline_hook ();
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115 }
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116
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117 static std::string last_working_directory (void)
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118 {
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119 return instance_ok ()
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120 ? instance->do_last_working_directory () : std::string ();
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121 }
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122
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123 static void update_workspace (void)
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124 {
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125 if (instance_ok ())
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126 instance->do_update_workspace ();
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127 }
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128
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129 static void update_history (void)
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130 {
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131 if (instance_ok ())
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132 instance->do_update_history ();
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133 }
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134
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135 static void pre_input_event_hook_fcn (void)
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136 {
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137 if (instance_ok ())
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138 instance->do_pre_input_event_hook_fcn ();
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139 }
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140
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141 static void post_input_event_hook_fcn (void)
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142 {
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143 if (instance_ok ())
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144 instance->do_post_input_event_hook_fcn ();
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145 }
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146
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147 private:
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148
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149 static octave_link *instance;
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150
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151 static void cleanup_instance (void) { delete instance; instance = 0; }
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152
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153 // No copying!
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154
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155 octave_link (const octave_link&);
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156
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157 octave_link& operator = (const octave_link&);
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158
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159 static bool instance_ok (void);
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160
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161 octave_event_listener *event_listener;
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162
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163 // Thread running octave_main.
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164 octave_main_thread *main_thread;
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165
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166 // Semaphore to lock access to the event queue.
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167 octave_mutex *event_queue_mutex;
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168
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169 // Event Queue.
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170 event_queue gui_event_queue;
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171
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172 // Stores the last known current working directory of octave.
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173 std::string last_cwd;
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174
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175 bool debugging;
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176
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177 void do_launch_octave (void);
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178 void do_register_event_listener (octave_event_listener *oel);
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179
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180 void do_generate_events (void);
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181 void do_process_events (void);
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182
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183 template <class T>
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184 void do_post_event (T *obj, void (T::*method) (void))
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185 {
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186 gui_event_queue.add_method (obj, method);
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187 }
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188
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189 template <class T, class A>
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190 void do_post_event (T *obj, void (T::*method) (A), A arg)
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191 {
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192 gui_event_queue.add_method (obj, method, arg);
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193 }
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194
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195 template <class T, class A>
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196 void do_post_event (T *obj, void (T::*method) (const A&), const A& arg)
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197 {
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198 gui_event_queue.add_method (obj, method, arg);
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199 }
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200
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201 void do_about_to_exit (void);
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202
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203 void do_entered_readline_hook (void) { }
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204 void do_finished_readline_hook (void) { }
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205
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206 std::string do_last_working_directory (void);
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207 void do_update_workspace (void);
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208 void do_update_history (void);
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209
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210 void do_pre_input_event_hook_fcn (void);
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211 void do_post_input_event_hook_fcn (void);
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212 };
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213
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214 #endif // OCTAVELINK_H