Mercurial > hg > orthanc-stone

annotate OrthancStone/Sources/Scene2D/GrayscaleWindowingSceneTracker.cpp @ 1606:874e178f34e9

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- ViewportController now has weak ptr to Viewport - Measuring tools + related commands and all trackers now store only a weak_ptr to the Viewport and lock() on demand for usage - LayerHolder and FixedPoint aligner store only a weak_ptr to the Viewport, too - Fixed float/double warning in GrayscaleWindowingSceneTracker
author Benjamin Golinvaux <bgo@osimis.io>
date Wed, 28 Oct 2020 20:14:34 +0100
parents 8563ea5d8ae4
children 5cdc5b98f14d
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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::weak_ptr<IViewport> viewportWeak,
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42 int layerIndex) :
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43 layer_(NULL)
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44 {
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45 boost::shared_ptr<IViewport> viewport = viewportWeak.lock();
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46 if (viewport != NULL)
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47 {
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48 lock_.reset(viewport->Lock());
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49
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50 if (lock_->GetController().GetScene().HasLayer(layerIndex))
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51 {
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52 ISceneLayer& layer = lock_->GetController().GetScene().GetLayer(layerIndex);
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53 if (layer.GetType() == ISceneLayer::Type_FloatTexture)
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54 {
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55 layer_ = &dynamic_cast<FloatTextureSceneLayer&>(layer);
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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
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61 bool IsValid() const
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62 {
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63 return layer_ != NULL;
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64 }
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65
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66 FloatTextureSceneLayer& GetLayer() const
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67 {
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68 if (layer_ == NULL)
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69 {
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70 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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71 }
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72 else
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73 {
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74 return *layer_;
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75 }
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76 }
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77
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78 void Invalidate()
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79 {
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80 if (lock_.get() != NULL)
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81 {
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82 lock_->Invalidate();
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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
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88 void GrayscaleWindowingSceneTracker::SetWindowing(float center,
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89 float width)
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90 {
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91 if (active_)
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92 {
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93 boost::shared_ptr<IViewport> viewport = viewport_.lock();
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94 GrayscaleLayerAccessor accessor(viewport, layerIndex_);
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95
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96 if (accessor.IsValid())
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97 {
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98 accessor.GetLayer().SetCustomWindowing(center, width);
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99 accessor.Invalidate();
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100 }
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101 }
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102 }
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103
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104
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105 GrayscaleWindowingSceneTracker::GrayscaleWindowingSceneTracker(boost::weak_ptr<IViewport> viewport,
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106 int layerIndex,
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107 const PointerEvent& event,
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108 unsigned int canvasWidth,
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109 unsigned int canvasHeight) :
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110 OneGesturePointerTracker(viewport),
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111 layerIndex_(layerIndex),
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112 clickX_(event.GetMainPosition().GetX()),
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113 clickY_(event.GetMainPosition().GetY())
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114 {
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115 active_ = false;
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116
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117 if (canvasWidth > 3 &&
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118 canvasHeight > 3)
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119 {
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120 boost::weak_ptr<IViewport> viewport = viewport_.lock();
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121 GrayscaleLayerAccessor accessor(viewport, layerIndex_);
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122
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123 if (accessor.IsValid())
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124 {
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125 FloatTextureSceneLayer& layer = accessor.GetLayer();
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126
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127 layer.GetWindowing(originalCenter_, originalWidth_);
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128
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129 float minValue, maxValue;
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130 layer.GetRange(minValue, maxValue);
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131
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132 normalization_ = (maxValue - minValue) / static_cast<double>(std::min(canvasWidth, canvasHeight) - 1);
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133 active_ = true;
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134 }
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135 else
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136 {
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137 LOG(INFO) << "Cannot create GrayscaleWindowingSceneTracker on a non-float texture";
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138 }
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139 }
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140 }
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141
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142 void GrayscaleWindowingSceneTracker::PointerMove(const PointerEvent& event)
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143 {
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144 if (active_)
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145 {
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146 const double x = event.GetMainPosition().GetX();
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147 const double y = event.GetMainPosition().GetY();
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148
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149 float center = originalCenter_ + static_cast<float>((x - clickX_) * normalization_);
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150 float width = originalWidth_ + static_cast<float>((y - clickY_) * normalization_);
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151
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152 if (width <= 1)
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153 {
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154 width = 1;
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155 }
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156
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157 SetWindowing(center, width);
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158 }
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159 }
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160
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161 void GrayscaleWindowingSceneTracker::Cancel()
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162 {
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163 SetWindowing(originalCenter_, originalWidth_);
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164 }
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165 }