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annotate Samples/Sdl/SdlHelpers.h @ 1392:ffdb82850e98

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Sdl run loop in /Common (might revert if need to customize) Segregation ongoing between sdl wasm Both samples ok SDL msvc v141 x64
author Benjamin Golinvaux <bgo@osimis.io>
date Tue, 28 Apr 2020 13:52:21 +0200
parents 240531afdd2d
children 3e644f6fadd4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #pragma once
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2
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3 #if ORTHANC_ENABLE_SDL != 1
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4 # error This file cannot be used if ORTHANC_ENABLE_SDL != 1
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5 #endif
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6
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7 #include <Framework/Viewport/SdlViewport.h>
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8
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9 #include <boost/shared_ptr.hpp>
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10
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11 #include <SDL.h>
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12
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13 #include <map>
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14 #include <string>
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15
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16 namespace OrthancStoneHelpers
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17 {
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18
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19 inline OrthancStone::KeyboardModifiers GetKeyboardModifiers(const uint8_t* keyboardState,
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20 const int scancodeCount)
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21 {
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22 using namespace OrthancStone;
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23 int result = KeyboardModifiers_None;
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24
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25 if (keyboardState != NULL)
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26 {
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27 if (SDL_SCANCODE_LSHIFT < scancodeCount &&
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28 keyboardState[SDL_SCANCODE_LSHIFT])
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29 {
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30 result |= KeyboardModifiers_Shift;
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31 }
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32
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33 if (SDL_SCANCODE_RSHIFT < scancodeCount &&
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34 keyboardState[SDL_SCANCODE_RSHIFT])
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35 {
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36 result |= KeyboardModifiers_Shift;
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37 }
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38
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39 if (SDL_SCANCODE_LCTRL < scancodeCount &&
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40 keyboardState[SDL_SCANCODE_LCTRL])
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41 {
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42 result |= KeyboardModifiers_Control;
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43 }
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44
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45 if (SDL_SCANCODE_RCTRL < scancodeCount &&
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46 keyboardState[SDL_SCANCODE_RCTRL])
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47 {
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48 result |= KeyboardModifiers_Control;
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49 }
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50
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51 if (SDL_SCANCODE_LALT < scancodeCount &&
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52 keyboardState[SDL_SCANCODE_LALT])
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53 {
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54 result |= KeyboardModifiers_Alt;
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55 }
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56
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57 if (SDL_SCANCODE_RALT < scancodeCount &&
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58 keyboardState[SDL_SCANCODE_RALT])
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59 {
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60 result |= KeyboardModifiers_Alt;
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61 }
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62 }
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63
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64 return static_cast<KeyboardModifiers>(result);
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65 }
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66
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67
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68 inline void GetPointerEvent(OrthancStone::PointerEvent& p,
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69 const OrthancStone::ICompositor& compositor,
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70 SDL_Event event,
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71 const uint8_t* keyboardState,
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72 const int scancodeCount)
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73 {
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74 using namespace OrthancStone;
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75 KeyboardModifiers modifiers = GetKeyboardModifiers(keyboardState, scancodeCount);
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76
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77 switch (event.button.button)
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78 {
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79 case SDL_BUTTON_LEFT:
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80 p.SetMouseButton(OrthancStone::MouseButton_Left);
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81 break;
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82
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83 case SDL_BUTTON_RIGHT:
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84 p.SetMouseButton(OrthancStone::MouseButton_Right);
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85 break;
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86
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87 case SDL_BUTTON_MIDDLE:
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88 p.SetMouseButton(OrthancStone::MouseButton_Middle);
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89 break;
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90
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91 default:
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92 p.SetMouseButton(OrthancStone::MouseButton_None);
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93 break;
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94 }
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95
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96 p.AddPosition(compositor.GetPixelCenterCoordinates(event.button.x, event.button.y));
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97 p.SetAltModifier(modifiers & KeyboardModifiers_Alt);
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98 p.SetControlModifier(modifiers & KeyboardModifiers_Control);
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99 p.SetShiftModifier(modifiers & KeyboardModifiers_Shift);
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100 }
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101
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102
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103 inline void SdlRunLoop(boost::shared_ptr<OrthancStone::SdlViewport> viewport,
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104 OrthancStone::IViewportInteractor& interactor)
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105 {
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106 using namespace OrthancStone;
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107 {
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108 int scancodeCount = 0;
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109 const uint8_t* keyboardState = SDL_GetKeyboardState(&scancodeCount);
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110
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111 bool stop = false;
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112 while (!stop)
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113 {
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114 bool paint = false;
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115 SDL_Event event;
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116 while (SDL_PollEvent(&event))
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117 {
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118 if (event.type == SDL_QUIT)
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119 {
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120 stop = true;
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121 break;
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122 }
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123 else if (viewport->IsRefreshEvent(event))
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124 {
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125 paint = true;
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126 }
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127 else if (event.type == SDL_WINDOWEVENT &&
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128 (event.window.event == SDL_WINDOWEVENT_RESIZED ||
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129 event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED))
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130 {
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131 viewport->UpdateSize(event.window.data1, event.window.data2);
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132 }
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133 else if (event.type == SDL_WINDOWEVENT &&
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134 (event.window.event == SDL_WINDOWEVENT_SHOWN ||
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135 event.window.event == SDL_WINDOWEVENT_EXPOSED))
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136 {
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137 paint = true;
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138 }
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139 else if (event.type == SDL_KEYDOWN &&
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140 event.key.repeat == 0 /* Ignore key bounce */)
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141 {
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142 switch (event.key.keysym.sym)
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143 {
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144 case SDLK_f:
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145 viewport->ToggleMaximize();
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146 break;
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147
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148 case SDLK_s:
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149 {
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150 std::unique_ptr<OrthancStone::IViewport::ILock> lock(viewport->Lock());
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151 lock->GetCompositor().FitContent(lock->GetController().GetScene());
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152 lock->Invalidate();
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153 }
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154 break;
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155
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156 case SDLK_q:
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157 stop = true;
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158 break;
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159
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160 default:
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161 break;
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162 }
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163 }
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164 else if (event.type == SDL_MOUSEBUTTONDOWN ||
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165 event.type == SDL_MOUSEMOTION ||
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166 event.type == SDL_MOUSEBUTTONUP)
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167 {
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168 std::auto_ptr<OrthancStone::IViewport::ILock> lock(viewport->Lock());
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169 if (lock->HasCompositor())
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170 {
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171 OrthancStone::PointerEvent p;
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172 OrthancStoneHelpers::GetPointerEvent(p, lock->GetCompositor(),
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173 event, keyboardState, scancodeCount);
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174
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175 switch (event.type)
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176 {
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177 case SDL_MOUSEBUTTONDOWN:
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178 lock->GetController().HandleMousePress(interactor, p,
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179 lock->GetCompositor().GetCanvasWidth(),
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180 lock->GetCompositor().GetCanvasHeight());
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181 lock->Invalidate();
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182 break;
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183
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184 case SDL_MOUSEMOTION:
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185 if (lock->GetController().HandleMouseMove(p))
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186 {
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187 lock->Invalidate();
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188 }
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189 break;
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190
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191 case SDL_MOUSEBUTTONUP:
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192 lock->GetController().HandleMouseRelease(p);
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193 lock->Invalidate();
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194 break;
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195
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196 default:
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197 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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198 }
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199 }
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200 }
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201 }
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202
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203 if (paint)
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204 {
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205 viewport->Paint();
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206 }
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207
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208 // Small delay to avoid using 100% of CPU
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209 SDL_Delay(1);
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210 }
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211 }
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212 }
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213
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214
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215
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216
1382
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217 }
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218