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annotate Applications/Generic/GuiAdapter.h @ 858:e3c56d4f863f

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GuiAdapter : mouse event routing in SDL + split the undo stack from the ViewportController for multi-canvas apps + adapted the samples to this change
author Benjamin Golinvaux <bgo@osimis.io>
date Mon, 24 Jun 2019 10:31:04 +0200
parents df0c73ee7afa
children f0bf971a1e31 12b591d5d63c
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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 #pragma once
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21
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22 #include <string>
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23
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24 #if ORTHANC_ENABLE_WASM != 1
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25 # ifdef __EMSCRIPTEN__
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26 # error __EMSCRIPTEN__ is defined and ORTHANC_ENABLE_WASM != 1
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27 # endif
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28 #endif
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29
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30 #if ORTHANC_ENABLE_WASM == 1
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31 # ifndef __EMSCRIPTEN__
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32 # error __EMSCRIPTEN__ is not defined and ORTHANC_ENABLE_WASM == 1
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33 # endif
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34 #endif
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35
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36 #if ORTHANC_ENABLE_WASM == 1
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37 # include <emscripten/html5.h>
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38 #else
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39 # if ORTHANC_ENABLE_SDL == 1
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40 # include <SDL.h>
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41 # endif
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42 #endif
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43
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44 #include "../../Framework/StoneException.h"
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45
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46 #if ORTHANC_ENABLE_THREADS != 1
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47 # include "../../Framework/Messages/LockingEmitter.h"
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48 #endif
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49
845
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50 #include <vector>
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51 #include <boost/shared_ptr.hpp>
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52 #include <boost/weak_ptr.hpp>
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53
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54 namespace OrthancStone
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55 {
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56
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57 /**
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58 This interface is used to store the widgets that are controlled by the
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59 GuiAdapter and receive event callbacks.
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60 The callbacks may possibly be downcast (using dynamic_cast, for safety) \
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61 to the actual widget type
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62 */
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63 class IGuiAdapterWidget
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64 {
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65 public:
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66 virtual ~IGuiAdapterWidget() {}
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67
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68 };
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69
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70 enum GuiAdapterMouseEventType
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71 {
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72 GUIADAPTER_EVENT_MOUSEDOWN = 1973,
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73 GUIADAPTER_EVENT_MOUSEMOVE = 1974,
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74 GUIADAPTER_EVENT_MOUSEUP = 1975,
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75 GUIADAPTER_EVENT_WHEEL = 1976
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76 };
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77
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78 const unsigned int GUIADAPTER_DELTA_PIXEL = 2973;
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79 const unsigned int GUIADAPTER_DELTA_LINE = 2974;
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80 const unsigned int GUIADAPTER_DELTA_PAGE = 2975;
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81
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82 struct GuiAdapterUiEvent;
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83 struct GuiAdapterMouseEvent;
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84 struct GuiAdapterWheelEvent;
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85 struct GuiAdapterKeyboardEvent;
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86
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87 class LockingEmitter;
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88
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89 #if 1
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90 typedef bool (*OnMouseEventFunc)(std::string canvasId, const GuiAdapterMouseEvent* mouseEvent, void* userData);
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91 typedef bool (*OnMouseWheelFunc)(std::string canvasId, const GuiAdapterWheelEvent* wheelEvent, void* userData);
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92 typedef bool (*OnKeyDownFunc) (std::string canvasId, const GuiAdapterKeyboardEvent* keyEvent, void* userData);
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93 typedef bool (*OnKeyUpFunc) (std::string canvasId, const GuiAdapterKeyboardEvent* keyEvent, void* userData);
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94
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95 typedef bool (*OnAnimationFrameFunc)(double time, void* userData);
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96 typedef bool (*OnWindowResizeFunc)(std::string canvasId, const GuiAdapterUiEvent* uiEvent, void* userData);
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97
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98 #else
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99
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100 #if ORTHANC_ENABLE_WASM == 1
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101 typedef EM_BOOL (*OnMouseEventFunc)(int eventType, const EmscriptenMouseEvent* mouseEvent, void* userData);
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102 typedef EM_BOOL (*OnMouseWheelFunc)(int eventType, const EmscriptenWheelEvent* wheelEvent, void* userData);
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103 typedef EM_BOOL (*OnKeyDownFunc) (int eventType, const EmscriptenKeyboardEvent* keyEvent, void* userData);
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104 typedef EM_BOOL (*OnKeyUpFunc) (int eventType, const EmscriptenKeyboardEvent* keyEvent, void* userData);
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105
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106 typedef EM_BOOL (*OnAnimationFrameFunc)(double time, void* userData);
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107 typedef EM_BOOL (*OnWindowResizeFunc)(int eventType, const EmscriptenUiEvent* uiEvent, void* userData);
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108 #else
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109 typedef bool (*OnMouseEventFunc)(int eventType, const SDL_Event* mouseEvent, void* userData);
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110 typedef bool (*OnMouseWheelFunc)(int eventType, const SDL_Event* wheelEvent, void* userData);
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111 typedef bool (*OnKeyDownFunc) (int eventType, const SDL_Event* keyEvent, void* userData);
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112 typedef bool (*OnKeyUpFunc) (int eventType, const SDL_Event* keyEvent, void* userData);
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113
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114 typedef bool (*OnAnimationFrameFunc)(double time, void* userData);
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115 typedef bool (*OnWindowResizeFunc)(int eventType, const GuiAdapterUiEvent* uiEvent, void* userData);
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116 #endif
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117
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118 #endif
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119 struct GuiAdapterMouseEvent {
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120 GuiAdapterMouseEventType type;
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121 //double timestamp;
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122 //long screenX;
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123 //long screenY;
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124 //long clientX;
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125 //long clientY;
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126 bool ctrlKey;
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127 bool shiftKey;
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128 bool altKey;
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129 //bool metaKey;
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130 unsigned short button;
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131 //unsigned short buttons;
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132 //long movementX;
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133 //long movementY;
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134 long targetX;
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135 long targetY;
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136 // 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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137 //long canvasX;
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138 //long canvasY;
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139 //long padding;
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140 };
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141
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142 struct GuiAdapterWheelEvent {
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143 GuiAdapterMouseEvent mouse;
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144 double deltaX;
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145 double deltaY;
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146 unsigned long deltaMode;
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147 };
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148
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149 // we don't use any data now
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150 struct GuiAdapterUiEvent {};
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151
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152 // EmscriptenKeyboardEvent
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153 struct GuiAdapterKeyboardEvent
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154 {
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155 bool ctrlKey;
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156 bool shiftKey;
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157 bool altKey;
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158 };
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159
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160 std::ostream& operator<<(std::ostream& os, const GuiAdapterKeyboardEvent& event);
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161
843
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162 /*
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163 Mousedown event trigger when either the left or right (or middle) mouse is pressed
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164 on the object;
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165
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166 Mouseup event trigger when either the left or right (or middle) mouse is released
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167 above the object after triggered mousedown event and held.
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168
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169 Click event trigger when the only left mouse button is pressed and released on the
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170 same object, requires the Mousedown and Mouseup event happened before Click event.
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171
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172 The normal expect trigger order: onMousedown >> onMouseup >> onClick
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173
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174 Testing in Chrome v58, the time between onMouseup and onClick events are around
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175 7ms to 15ms
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176
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177 FROM: https://codingrepo.com/javascript/2017/05/19/javascript-difference-mousedown-mouseup-click-events/
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178 */
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179 #if ORTHANC_ENABLE_WASM == 1
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180 void ConvertFromPlatform(
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181 GuiAdapterUiEvent& dest,
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182 int eventType,
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183 const EmscriptenUiEvent& src);
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184
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185 void ConvertFromPlatform(
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186 GuiAdapterMouseEvent& dest,
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187 int eventType,
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188 const EmscriptenMouseEvent& src);
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189
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190 void ConvertFromPlatform(
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191 GuiAdapterWheelEvent& dest,
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192 int eventType,
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193 const EmscriptenWheelEvent& src);
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194
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195 void ConvertFromPlatform(
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196 GuiAdapterKeyboardEvent& dest,
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197 const EmscriptenKeyboardEvent& src);
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198
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199 #else
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200
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201 # if ORTHANC_ENABLE_SDL == 1
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202 void ConvertFromPlatform(
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203 GuiAdapterMouseEvent& dest,
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204 bool ctrlPressed, bool shiftPressed, bool altPressed,
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205 const SDL_Event& source);
858
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206
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207 void ConvertFromPlatform(
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208 GuiAdapterWheelEvent& dest,
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209 bool ctrlPressed, bool shiftPressed, bool altPressed,
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210 const SDL_Event& source);
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211
843
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212 # endif
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213
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214 #endif
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215
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216 class GuiAdapter
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217 {
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218 public:
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219 #if ORTHANC_ENABLE_THREADS == 1
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220 GuiAdapter(LockingEmitter& lockingEmitter) : lockingEmitter_(lockingEmitter)
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221 #else
850
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222 GuiAdapter()
843
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223 #endif
850
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224 {
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225 static int instanceCount = 0;
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226 ORTHANC_ASSERT(instanceCount == 0);
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227 instanceCount = 1;
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228 }
843
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229
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230 void RegisterWidget(boost::shared_ptr<IGuiAdapterWidget> widget);
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231
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232 /**
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233 emscripten_set_resize_callback("#window", NULL, false, OnWindowResize);
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234
858
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235 emscripten_set_wheel_callback("mycanvas1", widget1_.get(), false, OnXXXMouseWheel);
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236 emscripten_set_wheel_callback("mycanvas2", widget2_.get(), false, OnXXXMouseWheel);
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237 emscripten_set_wheel_callback("mycanvas3", widget3_.get(), false, OnXXXMouseWheel);
843
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238
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239 emscripten_set_keydown_callback("#window", NULL, false, OnKeyDown);
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240 emscripten_set_keyup_callback("#window", NULL, false, OnKeyUp);
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241
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242 emscripten_request_animation_frame_loop(OnAnimationFrame, NULL);
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243
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244 SDL:
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245 see https://wiki.libsdl.org/SDL_CaptureMouse
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246
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247 */
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248
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249 void SetMouseDownCallback(std::string canvasId, void* userData, bool capture, OnMouseEventFunc func);
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250 void SetMouseMoveCallback(std::string canvasId, void* userData, bool capture, OnMouseEventFunc func);
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251 void SetMouseUpCallback (std::string canvasId, void* userData, bool capture, OnMouseEventFunc func);
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252 void SetWheelCallback (std::string canvasId, void* userData, bool capture, OnMouseWheelFunc func);
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253 void SetKeyDownCallback (std::string canvasId, void* userData, bool capture, OnKeyDownFunc func);
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254 void SetKeyUpCallback (std::string canvasId, void* userData, bool capture, OnKeyUpFunc func);
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255
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256 // if you pass "#window", under SDL, then any Window resize will trigger the callback
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257 void SetResizeCallback (std::string canvasId, void* userData, bool capture, OnWindowResizeFunc func);
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258
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259 void RequestAnimationFrame(OnAnimationFrameFunc func, void* userData);
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260
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261 // TODO: implement and call to remove canvases [in SDL, although code should be generic]
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262 void SetOnExitCallback();
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263
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264 // void
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265 // OnWindowResize
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266 // oracle
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267 // broker
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268
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269 /**
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270 Under SDL, this function does NOT return until all windows have been closed.
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271 Under wasm, it returns without doing anything, since the event loop is managed
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272 by the browser.
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273 */
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274 void Run();
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275
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276 #if ORTHANC_ENABLE_WASM != 1
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277 /**
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278 This method must be called in order for callback handler to be allowed to
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279 be registered.
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280
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281 We'll retrieve its name and use it as the canvas name in all subsequent
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282 calls
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283 */
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284 //void RegisterSdlWindow(SDL_Window* window);
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285 //void UnregisterSdlWindow(SDL_Window* window);
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286 #endif
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287
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288 private:
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289
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290 #if ORTHANC_ENABLE_THREADS == 1
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291 /**
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292 This object is used by the multithreaded Oracle to serialize access to
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293 shared data. We need to use it as soon as we access the state.
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294 */
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295 LockingEmitter& lockingEmitter_;
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296 #endif
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297
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298 /**
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299 In SDL, this executes all the registered headers
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300 */
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301 void OnAnimationFrame();
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302
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303 //void RequestAnimationFrame(OnAnimationFrameFunc func, void* userData);
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304 std::vector<std::pair<OnAnimationFrameFunc, void*> >
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305 animationFrameHandlers_;
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306
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307 void OnResize();
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308
858
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309 #if ORTHANC_ENABLE_SDL == 1
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310 template<typename Func>
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311 struct EventHandlerData
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312 {
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313 EventHandlerData(std::string canvasName, Func func, void* userData)
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314 : canvasName(canvasName)
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315 , func(func)
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316 , userData(userData)
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317 {
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318 }
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319
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320 std::string canvasName;
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321 Func func;
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322 void* userData;
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323 };
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324 std::vector<EventHandlerData<OnWindowResizeFunc> > resizeHandlers_;
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325 std::vector<EventHandlerData<OnMouseEventFunc > > mouseDownHandlers_;
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326 std::vector<EventHandlerData<OnMouseEventFunc > > mouseMoveHandlers_;
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327 std::vector<EventHandlerData<OnMouseEventFunc > > mouseUpHandlers_;
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328 std::vector<EventHandlerData<OnMouseWheelFunc > > mouseWheelHandlers_;
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329
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330
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331 /**
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332 This executes all the registered headers if needed (in wasm, the browser
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333 deals with this)
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334 */
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335 void OnMouseEvent(uint32_t windowID, const GuiAdapterMouseEvent& event);
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336
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337 /**
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338 Same remark as OnMouseEvent
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339 */
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340 void OnMouseWheelEvent(uint32_t windowID, const GuiAdapterWheelEvent& event);
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341
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342 boost::shared_ptr<IGuiAdapterWidget> GetWidgetFromWindowId();
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343
843
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344 #endif
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345
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346 /**
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347 This executes all the registered headers if needed (in wasm, the browser
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348 deals with this)
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349 */
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350 void ViewportsUpdateSize();
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351
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352 std::vector<boost::weak_ptr<IGuiAdapterWidget> > widgets_;
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353
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354 template<typename F> void VisitWidgets(F func)
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355 {
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356 for (size_t i = 0; i < widgets_.size(); i++)
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357 {
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358 boost::shared_ptr<IGuiAdapterWidget> widget = widgets_[i].lock();
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359 func(widget);
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360 }
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361 }
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362 };
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363 }