Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/GrayscaleWindowingSceneTracker.cpp @ 1598:8563ea5d8ae4
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 26 Oct 2020 20:49:28 +0100 |
parents | 4fb8fdf03314 |
children | 874e178f34e9 |
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 Lesser 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 * Lesser 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 Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
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20 **/ |
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21 |
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22 |
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23 #include "GrayscaleWindowingSceneTracker.h" |
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24 |
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25 #include "../Scene2DViewport/ViewportController.h" |
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26 #include "FloatTextureSceneLayer.h" |
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27 |
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28 #include <OrthancException.h> |
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29 |
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30 namespace OrthancStone |
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31 { |
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32 namespace |
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33 { |
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34 class GrayscaleLayerAccessor : public boost::noncopyable |
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35 { |
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36 private: |
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37 std::unique_ptr<IViewport::ILock> lock_; |
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38 FloatTextureSceneLayer* layer_; |
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39 |
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40 public: |
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41 GrayscaleLayerAccessor(boost::shared_ptr<IViewport> viewport, |
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42 int layerIndex) : |
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43 layer_(NULL) |
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44 { |
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45 if (viewport != NULL) |
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46 { |
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47 lock_.reset(viewport->Lock()); |
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48 |
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49 if (lock_->GetController().GetScene().HasLayer(layerIndex)) |
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50 { |
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51 ISceneLayer& layer = lock_->GetController().GetScene().GetLayer(layerIndex); |
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52 if (layer.GetType() == ISceneLayer::Type_FloatTexture) |
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53 { |
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54 layer_ = &dynamic_cast<FloatTextureSceneLayer&>(layer); |
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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 |
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60 bool IsValid() const |
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61 { |
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62 return layer_ != NULL; |
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63 } |
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64 |
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65 FloatTextureSceneLayer& GetLayer() const |
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66 { |
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67 if (layer_ == NULL) |
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68 { |
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69 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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70 } |
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71 else |
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72 { |
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73 return *layer_; |
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74 } |
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75 } |
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76 |
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77 void Invalidate() |
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78 { |
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79 if (lock_.get() != NULL) |
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80 { |
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81 lock_->Invalidate(); |
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82 } |
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83 } |
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84 }; |
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85 } |
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86 |
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87 void GrayscaleWindowingSceneTracker::SetWindowing(float center, |
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88 float width) |
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89 { |
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90 if (active_) |
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91 { |
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92 GrayscaleLayerAccessor accessor(viewport_, layerIndex_); |
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93 |
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94 if (accessor.IsValid()) |
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95 { |
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96 accessor.GetLayer().SetCustomWindowing(center, width); |
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97 accessor.Invalidate(); |
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98 } |
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99 } |
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100 } |
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101 |
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102 |
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103 GrayscaleWindowingSceneTracker::GrayscaleWindowingSceneTracker(boost::shared_ptr<IViewport> viewport, |
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104 int layerIndex, |
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105 const PointerEvent& event, |
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106 unsigned int canvasWidth, |
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107 unsigned int canvasHeight) : |
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108 OneGesturePointerTracker(viewport), |
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109 layerIndex_(layerIndex), |
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110 clickX_(event.GetMainPosition().GetX()), |
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111 clickY_(event.GetMainPosition().GetY()) |
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112 { |
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113 active_ = false; |
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114 |
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115 if (canvasWidth > 3 && |
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116 canvasHeight > 3) |
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117 { |
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118 GrayscaleLayerAccessor accessor(viewport_, layerIndex_); |
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119 |
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120 if (accessor.IsValid()) |
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121 { |
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122 FloatTextureSceneLayer& layer = accessor.GetLayer(); |
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123 |
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124 layer.GetWindowing(originalCenter_, originalWidth_); |
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125 |
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126 float minValue, maxValue; |
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127 layer.GetRange(minValue, maxValue); |
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128 |
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129 normalization_ = (maxValue - minValue) / static_cast<double>(std::min(canvasWidth, canvasHeight) - 1); |
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130 active_ = true; |
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131 } |
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132 else |
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133 { |
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134 LOG(INFO) << "Cannot create GrayscaleWindowingSceneTracker on a non-float texture"; |
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135 } |
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136 } |
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137 } |
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138 |
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139 void GrayscaleWindowingSceneTracker::PointerMove(const PointerEvent& event) |
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140 { |
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141 if (active_) |
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142 { |
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143 const double x = event.GetMainPosition().GetX(); |
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144 const double y = event.GetMainPosition().GetY(); |
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145 |
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146 float center = originalCenter_ + (x - clickX_) * normalization_; |
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147 float width = originalWidth_ + (y - clickY_) * normalization_; |
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148 |
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149 if (width <= 1) |
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150 { |
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151 width = 1; |
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152 } |
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153 |
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154 SetWindowing(center, width); |
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155 } |
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156 } |
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157 |
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158 void GrayscaleWindowingSceneTracker::Cancel() |
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159 { |
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160 SetWindowing(originalCenter_, originalWidth_); |
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161 } |
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162 } |