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annotate Framework/Radiography/RadiographyWindowingTracker.cpp @ 415:c0589c3173fd

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 13 Nov 2018 10:36:53 +0100
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children b70e9be013e4
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415
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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) 2017-2018 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 "RadiographyWindowingTracker.h"
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23
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24 #include <Core/OrthancException.h>
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25
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26
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27 namespace OrthancStone
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28 {
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29 class RadiographyWindowingTracker::UndoRedoCommand : public UndoRedoStack::ICommand
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30 {
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31 private:
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32 RadiographyScene& scene_;
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33 float sourceCenter_;
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34 float sourceWidth_;
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35 float targetCenter_;
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36 float targetWidth_;
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37
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38 public:
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39 UndoRedoCommand(const RadiographyWindowingTracker& tracker) :
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40 scene_(tracker.scene_),
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41 sourceCenter_(tracker.sourceCenter_),
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42 sourceWidth_(tracker.sourceWidth_)
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43 {
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44 scene_.GetWindowingWithDefault(targetCenter_, targetWidth_);
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45 }
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46
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47 virtual void Undo() const
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48 {
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49 scene_.SetWindowing(sourceCenter_, sourceWidth_);
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50 }
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51
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52 virtual void Redo() const
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53 {
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54 scene_.SetWindowing(targetCenter_, targetWidth_);
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55 }
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56 };
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57
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58
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59 void RadiographyWindowingTracker::ComputeAxisEffect(int& deltaCenter,
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60 int& deltaWidth,
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61 int delta,
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62 Action actionNegative,
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63 Action actionPositive)
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64 {
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65 if (delta < 0)
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66 {
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67 switch (actionNegative)
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68 {
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69 case Action_IncreaseWidth:
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70 deltaWidth = -delta;
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71 break;
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72
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73 case Action_DecreaseWidth:
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74 deltaWidth = delta;
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75 break;
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76
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77 case Action_IncreaseCenter:
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78 deltaCenter = -delta;
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79 break;
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80
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81 case Action_DecreaseCenter:
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82 deltaCenter = delta;
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83 break;
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84
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85 default:
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86 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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87 }
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88 }
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89 else if (delta > 0)
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90 {
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91 switch (actionPositive)
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92 {
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93 case Action_IncreaseWidth:
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94 deltaWidth = delta;
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95 break;
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96
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97 case Action_DecreaseWidth:
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98 deltaWidth = -delta;
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99 break;
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100
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101 case Action_IncreaseCenter:
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102 deltaCenter = delta;
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103 break;
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104
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105 case Action_DecreaseCenter:
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106 deltaCenter = -delta;
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107 break;
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108
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109 default:
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110 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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111 }
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112 }
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113 }
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114
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115
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116 RadiographyWindowingTracker::RadiographyWindowingTracker(UndoRedoStack& undoRedoStack,
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117 RadiographyScene& scene,
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118 int x,
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119 int y,
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120 Action leftAction,
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121 Action rightAction,
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122 Action upAction,
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123 Action downAction) :
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124 undoRedoStack_(undoRedoStack),
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125 scene_(scene),
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126 clickX_(x),
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127 clickY_(y),
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128 leftAction_(leftAction),
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129 rightAction_(rightAction),
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130 upAction_(upAction),
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131 downAction_(downAction)
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132 {
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133 scene_.GetWindowingWithDefault(sourceCenter_, sourceWidth_);
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134
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135 float minValue, maxValue;
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136 scene.GetRange(minValue, maxValue);
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137
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138 assert(minValue <= maxValue);
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139
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140 float tmp;
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141
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142 float delta = (maxValue - minValue);
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143 if (delta <= 1)
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144 {
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145 tmp = 0;
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146 }
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147 else
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148 {
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149 // NB: Visual Studio 2008 does not provide "log2f()", so we
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150 // implement it by ourselves
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151 tmp = logf(delta) / logf(2.0f);
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152 }
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153
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154 strength_ = tmp - 7;
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155 if (strength_ < 1)
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156 {
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157 strength_ = 1;
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158 }
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159 }
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160
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161
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162 void RadiographyWindowingTracker::Render(CairoContext& context,
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163 double zoom)
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164 {
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165 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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166 }
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167
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168
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169 void RadiographyWindowingTracker::MouseUp()
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170 {
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171 undoRedoStack_.Add(new UndoRedoCommand(*this));
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172 }
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173
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174
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175 void RadiographyWindowingTracker::MouseMove(int displayX,
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176 int displayY,
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177 double sceneX,
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178 double sceneY)
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179 {
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180 // This follows the behavior of the Osimis Web viewer:
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181 // https://bitbucket.org/osimis/osimis-webviewer-plugin/src/master/frontend/src/app/viewport/image-plugins/windowing-viewport-tool.class.js
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182
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183 static const float SCALE = 1.0;
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184
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185 int deltaCenter = 0;
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186 int deltaWidth = 0;
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187
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188 ComputeAxisEffect(deltaCenter, deltaWidth, displayX - clickX_, leftAction_, rightAction_);
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189 ComputeAxisEffect(deltaCenter, deltaWidth, displayY - clickY_, upAction_, downAction_);
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190
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191 float newCenter = sourceCenter_ + (deltaCenter / SCALE * strength_);
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192 float newWidth = sourceWidth_ + (deltaWidth / SCALE * strength_);
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193 scene_.SetWindowing(newCenter, newWidth);
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194 }
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195 }