Mercurial > hg > orthanc-stone
annotate Framework/Viewport/WebAssemblyViewport.cpp @ 1328:fd616c4a5904 broker
Added mechanism to prevent callbacks from being sent on dead WebAssemblyViewport objects
author | Benjamin Golinvaux <bgo@osimis.io> |
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date | Fri, 27 Mar 2020 12:54:27 +0100 |
parents | cbfdba08e039 |
children | ab81ee8fce1f |
rev | line source |
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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) 2017-2020 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 |
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21 |
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22 #include "WebAssemblyViewport.h" |
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24 #include "../Toolbox/GenericToolbox.h" |
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25 |
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26 #include <Core/OrthancException.h> |
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28 #include <boost/make_shared.hpp> |
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29 #include <boost/enable_shared_from_this.hpp> |
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30 |
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31 namespace OrthancStone |
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32 { |
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33 static void ConvertMouseEvent(PointerEvent& target, |
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34 const EmscriptenMouseEvent& source, |
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35 const ICompositor& compositor) |
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36 { |
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37 int x = static_cast<int>(source.targetX); |
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38 int y = static_cast<int>(source.targetY); |
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39 |
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40 switch (source.button) |
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41 { |
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42 case 0: |
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43 target.SetMouseButton(MouseButton_Left); |
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44 break; |
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45 |
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46 case 1: |
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47 target.SetMouseButton(MouseButton_Middle); |
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48 break; |
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49 |
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50 case 2: |
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51 target.SetMouseButton(MouseButton_Right); |
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52 break; |
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53 |
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54 default: |
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55 target.SetMouseButton(MouseButton_None); |
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56 break; |
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57 } |
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58 |
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59 target.AddPosition(compositor.GetPixelCenterCoordinates(x, y)); |
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60 target.SetAltModifier(source.altKey); |
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61 target.SetControlModifier(source.ctrlKey); |
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62 target.SetShiftModifier(source.shiftKey); |
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63 } |
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64 |
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65 |
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66 class WebAssemblyViewport::WasmLock : public ILock |
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67 { |
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68 private: |
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69 WebAssemblyViewport& that_; |
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70 |
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71 public: |
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72 WasmLock(WebAssemblyViewport& that) : |
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73 that_(that) |
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74 { |
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75 } |
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76 |
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77 virtual bool HasCompositor() const ORTHANC_OVERRIDE |
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78 { |
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79 return that_.compositor_.get() != NULL; |
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80 } |
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81 |
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82 virtual ICompositor& GetCompositor() ORTHANC_OVERRIDE |
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83 { |
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84 if (that_.compositor_.get() == NULL) |
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85 { |
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86 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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87 } |
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88 else |
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89 { |
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90 return *that_.compositor_; |
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91 } |
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92 } |
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93 |
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94 virtual ViewportController& GetController() ORTHANC_OVERRIDE |
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95 { |
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96 assert(that_.controller_); |
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97 return *that_.controller_; |
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98 } |
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99 |
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100 virtual void Invalidate() ORTHANC_OVERRIDE |
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101 { |
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102 that_.Invalidate(); |
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103 } |
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104 }; |
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105 |
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106 |
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107 EM_BOOL WebAssemblyViewport::OnRequestAnimationFrame(double time, void *userData) |
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108 { |
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109 boost::shared_ptr<WebAssemblyViewport> that = GenericToolbox::HoldingRef<WebAssemblyViewport>::Unwrap(userData); |
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110 |
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111 if (that->compositor_.get() != NULL && |
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112 that->controller_ /* should always be true */) |
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113 { |
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114 that->Paint(*that->compositor_, *that->controller_); |
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115 } |
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116 |
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117 return true; |
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118 } |
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119 |
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120 EM_BOOL WebAssemblyViewport::OnResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData) |
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121 { |
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122 boost::shared_ptr<WebAssemblyViewport> that = GenericToolbox::HoldingRef<WebAssemblyViewport>::Unwrap(userData); |
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123 |
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124 if (that->compositor_.get() != NULL) |
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125 { |
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126 that->UpdateSize(*that->compositor_); |
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127 that->Invalidate(); |
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128 } |
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129 |
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130 return true; |
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131 } |
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132 |
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133 |
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134 EM_BOOL WebAssemblyViewport::OnMouseDown(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData) |
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135 { |
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136 boost::shared_ptr<WebAssemblyViewport> that = GenericToolbox::HoldingRef<WebAssemblyViewport>::Unwrap(userData); |
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137 |
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138 LOG(INFO) << "mouse down: " << that->GetFullCanvasId(); |
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139 |
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140 if (that->compositor_.get() != NULL && |
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141 that->interactor_.get() != NULL) |
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142 { |
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143 PointerEvent pointer; |
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144 ConvertMouseEvent(pointer, *mouseEvent, *that->compositor_); |
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145 |
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146 that->controller_->HandleMousePress(*that->interactor_, pointer, |
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147 that->compositor_->GetCanvasWidth(), |
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148 that->compositor_->GetCanvasHeight()); |
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149 that->Invalidate(); |
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150 } |
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151 |
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152 return true; |
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153 } |
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154 |
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155 |
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156 EM_BOOL WebAssemblyViewport::OnMouseMove(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData) |
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157 { |
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158 boost::shared_ptr<WebAssemblyViewport> that = GenericToolbox::HoldingRef<WebAssemblyViewport>::Unwrap(userData); |
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159 |
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160 if (that->compositor_.get() != NULL && |
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161 that->controller_->HasActiveTracker()) |
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162 { |
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163 PointerEvent pointer; |
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164 ConvertMouseEvent(pointer, *mouseEvent, *that->compositor_); |
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165 if (that->controller_->HandleMouseMove(pointer)) |
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167 that->Invalidate(); |
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169 } |
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170 |
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171 return true; |
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172 } |
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173 |
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174 EM_BOOL WebAssemblyViewport::OnMouseUp(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData) |
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175 { |
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176 boost::shared_ptr<WebAssemblyViewport> that = GenericToolbox::HoldingRef<WebAssemblyViewport>::Unwrap(userData); |
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177 |
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178 if (that->compositor_.get() != NULL) |
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179 { |
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180 PointerEvent pointer; |
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181 ConvertMouseEvent(pointer, *mouseEvent, *that->compositor_); |
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182 that->controller_->HandleMouseRelease(pointer); |
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183 that->Invalidate(); |
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184 } |
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185 |
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186 return true; |
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187 } |
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188 |
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189 void WebAssemblyViewport::Invalidate() |
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190 { |
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191 emscripten_request_animation_frame(OnRequestAnimationFrame, GenericToolbox::HoldingRef<WebAssemblyViewport>::Wrap(this)); |
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192 } |
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193 |
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194 void WebAssemblyViewport::AcquireCompositor(ICompositor* compositor /* takes ownership */) |
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195 { |
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196 if (compositor == NULL) |
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197 { |
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198 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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199 } |
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200 else |
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201 { |
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202 compositor_.reset(compositor); |
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203 } |
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204 } |
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205 |
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206 WebAssemblyViewport::WebAssemblyViewport( |
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207 const std::string& canvasId, |
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208 const Scene2D* scene, |
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209 boost::weak_ptr<UndoStack> undoStackW) : |
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210 shortCanvasId_(canvasId), |
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211 fullCanvasId_(canvasId), |
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212 interactor_(new DefaultViewportInteractor) |
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213 { |
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214 if(undoStackW.lock() != NULL) |
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215 { |
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216 controller_ = boost::make_shared<ViewportController>(*this,undoStackW); |
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217 } |
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218 else if (scene == NULL) |
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219 { |
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220 controller_ = boost::make_shared<ViewportController>(*this); |
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221 } |
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222 else |
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223 { |
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224 controller_ = boost::make_shared<ViewportController>(*this,*scene); |
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225 } |
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226 |
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227 LOG(INFO) << "Initializing Stone viewport on HTML canvas: " << canvasId; |
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228 |
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229 if (canvasId.empty() || |
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230 canvasId[0] == '#') |
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231 { |
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232 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange, |
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233 "The canvas identifier must not start with '#'"); |
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234 } |
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235 |
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236 // Disable right-click on the canvas (i.e. context menu) |
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237 EM_ASM({ |
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238 document.getElementById(UTF8ToString($0)).oncontextmenu = function(event) { |
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239 event.preventDefault(); |
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240 } |
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241 }, |
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242 canvasId.c_str() // $0 |
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243 ); |
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244 |
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245 LOG(TRACE) << "2020-03-16-16h23 About to call emscripten_set_XXXX_callback on \"" |
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246 << fullCanvasId_.c_str() << "\" from WebAssemblyViewport::WebAssemblyViewport"; |
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247 |
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248 #if 1 |
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249 // It is not possible to monitor the resizing of individual |
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250 // canvas, so we track the full window of the browser |
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251 emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, this, false, OnResize); |
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252 |
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253 emscripten_set_mousedown_callback(fullCanvasId_.c_str(), this, false, OnMouseDown); |
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254 emscripten_set_mousemove_callback(fullCanvasId_.c_str(), this, false, OnMouseMove); |
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255 emscripten_set_mouseup_callback(fullCanvasId_.c_str(), this, false, OnMouseUp); |
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256 #endif |
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257 LOG(TRACE) << "2020-03-16-16h23 DONE calling emscripten_set_XXXX_callback on \"" |
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258 << fullCanvasId_.c_str() << "\" from WebAssemblyViewport::WebAssemblyViewport"; |
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259 } |
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260 |
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261 |
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262 IViewport::ILock* WebAssemblyViewport::Lock() |
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263 { |
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264 return new WasmLock(*this); |
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265 } |
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266 |
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267 |
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268 void WebAssemblyViewport::AcquireInteractor(IViewportInteractor* interactor) |
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269 { |
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270 if (interactor == NULL) |
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271 { |
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272 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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273 } |
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274 else |
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275 { |
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276 interactor_.reset(interactor); |
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277 } |
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278 } |
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279 } |