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annotate Applications/Generic/GuiAdapter.h @ 850:df0c73ee7afa

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Prevent creation of multiple GuiAdapter instances
author Benjamin Golinvaux <bgo@osimis.io>
date Mon, 17 Jun 2019 16:12:52 +0200
parents cdba0dbb4682
children e3c56d4f863f
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20 #include <string>
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21
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22 #if ORTHANC_ENABLE_WASM != 1
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23 # ifdef __EMSCRIPTEN__
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24 # error __EMSCRIPTEN__ is defined and ORTHANC_ENABLE_WASM != 1
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25 # endif
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26 #endif
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27
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28 #if ORTHANC_ENABLE_WASM == 1
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29 # ifndef __EMSCRIPTEN__
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30 # error __EMSCRIPTEN__ is not defined and ORTHANC_ENABLE_WASM == 1
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31 # endif
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32 #endif
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33
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34 #if ORTHANC_ENABLE_WASM == 1
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35 # include <emscripten/html5.h>
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36 #else
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37 # if ORTHANC_ENABLE_SDL == 1
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38 # include <SDL.h>
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39 # endif
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40 #endif
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41
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42 #include "../../Framework/StoneException.h"
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43
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44 #if ORTHANC_ENABLE_THREADS != 1
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45 # include "../../Framework/Messages/LockingEmitter.h"
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46 #endif
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47
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48 #include <vector>
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49 #include <boost/shared_ptr.hpp>
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50 #include <boost/weak_ptr.hpp>
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51
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52 namespace OrthancStone
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53 {
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54
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55 /**
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56 This interface is used to store the widgets that are controlled by the
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57 GuiAdapter and receive event callbacks.
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58 The callbacks may possibly be downcast (using dynamic_cast, for safety) \
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59 to the actual widget type
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60 */
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61 class IGuiAdapterWidget
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62 {
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63 public:
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64 virtual ~IGuiAdapterWidget() {}
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65 };
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66
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67 enum GuiAdapterMouseEventType
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68 {
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69 GUIADAPTER_EVENT_MOUSEDOWN = 1973,
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70 GUIADAPTER_EVENT_MOUSEMOVE = 1974,
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71 GUIADAPTER_EVENT_MOUSEUP = 1975,
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72 GUIADAPTER_EVENT_WHEEL = 1976
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73 };
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74
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75 const unsigned int GUIADAPTER_DELTA_PIXEL = 2973;
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76 const unsigned int GUIADAPTER_DELTA_LINE = 2974;
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77 const unsigned int GUIADAPTER_DELTA_PAGE = 2975;
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78
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79 struct GuiAdapterUiEvent;
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80 struct GuiAdapterMouseEvent;
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81 struct GuiAdapterWheelEvent;
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82 struct GuiAdapterKeyboardEvent;
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83
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84 class LockingEmitter;
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85
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86 #if 1
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87 typedef bool (*OnMouseEventFunc)(const GuiAdapterMouseEvent* mouseEvent, void* userData);
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88 typedef bool (*OnMouseWheelFunc)(const GuiAdapterWheelEvent* wheelEvent, void* userData);
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89 typedef bool (*OnKeyDownFunc) (const GuiAdapterKeyboardEvent* keyEvent, void* userData);
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90 typedef bool (*OnKeyUpFunc) (const GuiAdapterKeyboardEvent* keyEvent, void* userData);
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91
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92 typedef bool (*OnAnimationFrameFunc)(double time, void* userData);
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93 typedef bool (*OnWindowResizeFunc)(const GuiAdapterUiEvent* uiEvent, void* userData);
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94
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95 #else
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96
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97 #if ORTHANC_ENABLE_WASM == 1
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98 typedef EM_BOOL (*OnMouseEventFunc)(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
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99 typedef EM_BOOL (*OnMouseWheelFunc)(int eventType, const EmscriptenWheelEvent* wheelEvent, void* userData);
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100 typedef EM_BOOL (*OnKeyDownFunc) (int eventType, const EmscriptenKeyboardEvent* keyEvent, void* userData);
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101 typedef EM_BOOL (*OnKeyUpFunc) (int eventType, const EmscriptenKeyboardEvent* keyEvent, void* userData);
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102
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103 typedef EM_BOOL (*OnAnimationFrameFunc)(double time, void* userData);
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104 typedef EM_BOOL (*OnWindowResizeFunc)(int eventType, const EmscriptenUiEvent* uiEvent, void* userData);
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105 #else
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106 typedef bool (*OnMouseEventFunc)(int eventType, const SDL_Event* mouseEvent, void* userData);
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107 typedef bool (*OnMouseWheelFunc)(int eventType, const SDL_Event* wheelEvent, void* userData);
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108 typedef bool (*OnKeyDownFunc) (int eventType, const SDL_Event* keyEvent, void* userData);
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109 typedef bool (*OnKeyUpFunc) (int eventType, const SDL_Event* keyEvent, void* userData);
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110
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111 typedef bool (*OnAnimationFrameFunc)(double time, void* userData);
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112 typedef bool (*OnWindowResizeFunc)(int eventType, const GuiAdapterUiEvent* uiEvent, void* userData);
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113 #endif
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114
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115 #endif
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116 struct GuiAdapterMouseEvent {
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117 GuiAdapterMouseEventType type;
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118 //double timestamp;
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119 //long screenX;
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120 //long screenY;
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121 //long clientX;
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122 //long clientY;
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123 bool ctrlKey;
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124 bool shiftKey;
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125 bool altKey;
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126 //bool metaKey;
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127 unsigned short button;
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128 //unsigned short buttons;
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129 //long movementX;
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130 //long movementY;
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131 long targetX;
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132 long targetY;
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133 // canvasX and canvasY are deprecated - there no longer exists a Module['canvas'] object, so canvasX/Y are no longer reported (register a listener on canvas directly to get canvas coordinates, or translate manually)
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134 //long canvasX;
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135 //long canvasY;
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136 //long padding;
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137 };
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138
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139 struct GuiAdapterWheelEvent {
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140 GuiAdapterMouseEvent mouse;
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141 double deltaX;
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142 double deltaY;
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143 unsigned long deltaMode;
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144 };
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145
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146 // we don't use any data now
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147 struct GuiAdapterUiEvent {};
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148
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149 // EmscriptenKeyboardEvent
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150 struct GuiAdapterKeyboardEvent
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151 {
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152 bool ctrlKey;
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153 bool shiftKey;
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154 bool altKey;
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155 };
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156
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157 /*
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158 Mousedown event trigger when either the left or right (or middle) mouse is pressed
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159 on the object;
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160
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161 Mouseup event trigger when either the left or right (or middle) mouse is released
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162 above the object after triggered mousedown event and held.
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163
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164 Click event trigger when the only left mouse button is pressed and released on the
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165 same object, requires the Mousedown and Mouseup event happened before Click event.
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166
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167 The normal expect trigger order: onMousedown >> onMouseup >> onClick
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168
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169 Testing in Chrome v58, the time between onMouseup and onClick events are around
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170 7ms to 15ms
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171
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172 FROM: https://codingrepo.com/javascript/2017/05/19/javascript-difference-mousedown-mouseup-click-events/
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173 */
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174 #if ORTHANC_ENABLE_WASM == 1
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175 void ConvertFromPlatform(
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176 GuiAdapterUiEvent& dest,
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177 int eventType,
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178 const EmscriptenUiEvent& src);
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179
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180 void ConvertFromPlatform(
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181 GuiAdapterMouseEvent& dest,
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182 int eventType,
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183 const EmscriptenMouseEvent& src);
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184
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185 void ConvertFromPlatform(
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186 GuiAdapterWheelEvent& dest,
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187 int eventType,
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188 const EmscriptenWheelEvent& src);
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189
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190 void ConvertFromPlatform(
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191 GuiAdapterKeyboardEvent& dest,
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192 const EmscriptenKeyboardEvent& src);
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193
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194 #else
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195
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196 # if ORTHANC_ENABLE_SDL == 1
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197 void ConvertFromPlatform(
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198 GuiAdapterMouseEvent& dest,
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199 bool ctrlPressed, bool shiftPressed, bool altPressed,
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200 const SDL_Event& source);
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201 # endif
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202
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203 #endif
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204
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205 class GuiAdapter
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206 {
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207 public:
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208 #if ORTHANC_ENABLE_THREADS == 1
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209 GuiAdapter(LockingEmitter& lockingEmitter) : lockingEmitter_(lockingEmitter)
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210 #else
850
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211 GuiAdapter()
843
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212 #endif
850
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213 {
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214 static int instanceCount = 0;
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215 ORTHANC_ASSERT(instanceCount == 0);
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216 instanceCount = 1;
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217 }
843
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218
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219 void RegisterWidget(boost::shared_ptr<IGuiAdapterWidget> widget);
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220
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221 /**
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222 emscripten_set_resize_callback("#window", NULL, false, OnWindowResize);
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223
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224 emscripten_set_wheel_callback("mycanvas1", widget1_.get(), false, OnMouseWheel);
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225 emscripten_set_wheel_callback("mycanvas2", widget2_.get(), false, OnMouseWheel);
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226 emscripten_set_wheel_callback("mycanvas3", widget3_.get(), false, OnMouseWheel);
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227
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228 emscripten_set_keydown_callback("#window", NULL, false, OnKeyDown);
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229 emscripten_set_keyup_callback("#window", NULL, false, OnKeyUp);
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230
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231 emscripten_request_animation_frame_loop(OnAnimationFrame, NULL);
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232
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233 SDL:
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234 see https://wiki.libsdl.org/SDL_CaptureMouse
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235
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236 */
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237
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238 void SetMouseDownCallback(std::string canvasId, void* userData, bool capture, OnMouseEventFunc func);
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239 void SetMouseMoveCallback(std::string canvasId, void* userData, bool capture, OnMouseEventFunc func);
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240 void SetMouseUpCallback (std::string canvasId, void* userData, bool capture, OnMouseEventFunc func);
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241 void SetWheelCallback (std::string canvasId, void* userData, bool capture, OnMouseWheelFunc func);
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242 void SetKeyDownCallback (std::string canvasId, void* userData, bool capture, OnKeyDownFunc func);
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243 void SetKeyUpCallback (std::string canvasId, void* userData, bool capture, OnKeyUpFunc func);
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244
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245 // if you pass "#window", under SDL, then any Window resize will trigger the callback
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246 void SetResizeCallback (std::string canvasId, void* userData, bool capture, OnWindowResizeFunc func);
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247
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248 void RequestAnimationFrame(OnAnimationFrameFunc func, void* userData);
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249
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250 // TODO: implement and call to remove canvases [in SDL, although code should be generic]
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251 void SetOnExitCallback();
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252
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253 // void
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254 // OnWindowResize
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255 // oracle
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256 // broker
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257
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258 /**
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259 Under SDL, this function does NOT return until all windows have been closed.
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260 Under wasm, it returns without doing anything, since the event loop is managed
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261 by the browser.
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262 */
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263 void Run();
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264
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265 #if ORTHANC_ENABLE_WASM != 1
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266 /**
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267 This method must be called in order for callback handler to be allowed to
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268 be registered.
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269
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270 We'll retrieve its name and use it as the canvas name in all subsequent
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271 calls
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272 */
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273 //void RegisterSdlWindow(SDL_Window* window);
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274 //void UnregisterSdlWindow(SDL_Window* window);
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275 #endif
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276
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277 private:
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278
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279 #if ORTHANC_ENABLE_THREADS == 1
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280 /**
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281 This object is used by the multithreaded Oracle to serialize access to
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282 shared data. We need to use it as soon as we access the state.
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283 */
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284 LockingEmitter& lockingEmitter_;
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285 #endif
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286
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287 /**
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288 In SDL, this executes all the registered headers
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289 */
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290 void OnAnimationFrame();
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291
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292 //void RequestAnimationFrame(OnAnimationFrameFunc func, void* userData);
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293 std::vector<std::pair<OnAnimationFrameFunc, void*> >
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294 animationFrameHandlers_;
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295
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296 void OnResize();
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297
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298 std::vector<std::pair<OnWindowResizeFunc, void*> >
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299 resizeHandlers_;
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300
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301
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302 #if ORTHANC_ENABLE_SDL == 1
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303
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304 /**
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305 This executes all the registered headers if needed (in wasm, the browser
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306 deals with this)
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307 */
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308 void OnMouseEvent(uint32_t windowID, const GuiAdapterMouseEvent& event);
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309 #endif
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310
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311 /**
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312 This executes all the registered headers if needed (in wasm, the browser
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313 deals with this)
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314 */
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315 void ViewportsUpdateSize();
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316
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317 std::vector<boost::weak_ptr<IGuiAdapterWidget> > widgets_;
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318
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319 template<typename F> void VisitWidgets(F func)
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320 {
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321 for (size_t i = 0; i < widgets_.size(); i++)
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322 {
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323 boost::shared_ptr<IGuiAdapterWidget> widget = widgets_[i].lock();
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324 func(widget);
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325 }
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326 }
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327 };
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328 }