Mercurial > hg > orthanc-stone
comparison OrthancStone/Sources/Scene2D/GrayscaleWindowingSceneTracker.cpp @ 1533:82279abb92d0
GrayscaleWindowingSceneTracker
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 07 Aug 2020 15:55:59 +0200 |
parents | |
children | 4fb8fdf03314 |
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1532:c7a37c3a0b8e | 1533:82279abb92d0 |
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1 /** | |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
5 * Copyright (C) 2017-2020 Osimis S.A., Belgium | |
6 * | |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU Affero General Public License | |
9 * as published by the Free Software Foundation, either version 3 of | |
10 * the License, or (at your option) any later version. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, but | |
13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 * Affero General Public License for more details. | |
16 * | |
17 * You should have received a copy of the GNU Affero General Public License | |
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 **/ | |
20 | |
21 | |
22 #include "GrayscaleWindowingSceneTracker.h" | |
23 | |
24 #include "../Scene2DViewport/ViewportController.h" | |
25 #include "FloatTextureSceneLayer.h" | |
26 | |
27 #include <OrthancException.h> | |
28 | |
29 namespace OrthancStone | |
30 { | |
31 namespace | |
32 { | |
33 class GrayscaleLayerAccessor : public boost::noncopyable | |
34 { | |
35 private: | |
36 std::unique_ptr<IViewport::ILock> lock_; | |
37 FloatTextureSceneLayer* layer_; | |
38 | |
39 public: | |
40 GrayscaleLayerAccessor(boost::shared_ptr<IViewport> viewport, | |
41 int layerIndex) : | |
42 layer_(NULL) | |
43 { | |
44 if (viewport != NULL) | |
45 { | |
46 lock_.reset(viewport->Lock()); | |
47 | |
48 if (lock_->GetController().GetScene().HasLayer(layerIndex)) | |
49 { | |
50 ISceneLayer& layer = lock_->GetController().GetScene().GetLayer(layerIndex); | |
51 if (layer.GetType() == ISceneLayer::Type_FloatTexture) | |
52 { | |
53 layer_ = &dynamic_cast<FloatTextureSceneLayer&>(layer); | |
54 } | |
55 } | |
56 } | |
57 } | |
58 | |
59 bool IsValid() const | |
60 { | |
61 return layer_ != NULL; | |
62 } | |
63 | |
64 FloatTextureSceneLayer& GetLayer() const | |
65 { | |
66 if (layer_ == NULL) | |
67 { | |
68 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
69 } | |
70 else | |
71 { | |
72 return *layer_; | |
73 } | |
74 } | |
75 | |
76 void Invalidate() | |
77 { | |
78 if (lock_.get() != NULL) | |
79 { | |
80 lock_->Invalidate(); | |
81 } | |
82 } | |
83 }; | |
84 } | |
85 | |
86 void GrayscaleWindowingSceneTracker::SetWindowing(float center, | |
87 float width) | |
88 { | |
89 if (active_) | |
90 { | |
91 GrayscaleLayerAccessor accessor(viewport_, layerIndex_); | |
92 | |
93 if (accessor.IsValid()) | |
94 { | |
95 accessor.GetLayer().SetCustomWindowing(center, width); | |
96 accessor.Invalidate(); | |
97 } | |
98 } | |
99 } | |
100 | |
101 | |
102 GrayscaleWindowingSceneTracker::GrayscaleWindowingSceneTracker(boost::shared_ptr<IViewport> viewport, | |
103 int layerIndex, | |
104 const PointerEvent& event, | |
105 unsigned int canvasWidth, | |
106 unsigned int canvasHeight) : | |
107 OneGesturePointerTracker(viewport), | |
108 layerIndex_(layerIndex), | |
109 clickX_(event.GetMainPosition().GetX()), | |
110 clickY_(event.GetMainPosition().GetY()) | |
111 { | |
112 active_ = false; | |
113 | |
114 if (canvasWidth > 3 && | |
115 canvasHeight > 3) | |
116 { | |
117 GrayscaleLayerAccessor accessor(viewport_, layerIndex_); | |
118 | |
119 if (accessor.IsValid()) | |
120 { | |
121 FloatTextureSceneLayer& layer = accessor.GetLayer(); | |
122 | |
123 layer.GetWindowing(originalCenter_, originalWidth_); | |
124 | |
125 float minValue, maxValue; | |
126 layer.GetRange(minValue, maxValue); | |
127 | |
128 normalization_ = (maxValue - minValue) / static_cast<double>(std::min(canvasWidth, canvasHeight) - 1); | |
129 active_ = true; | |
130 } | |
131 else | |
132 { | |
133 LOG(INFO) << "Cannot create GrayscaleWindowingSceneTracker on a non-float texture"; | |
134 } | |
135 } | |
136 } | |
137 | |
138 void GrayscaleWindowingSceneTracker::PointerMove(const PointerEvent& event) | |
139 { | |
140 if (active_) | |
141 { | |
142 const double x = event.GetMainPosition().GetX(); | |
143 const double y = event.GetMainPosition().GetY(); | |
144 | |
145 float center = originalCenter_ + (x - clickX_) * normalization_; | |
146 float width = originalWidth_ + (y - clickY_) * normalization_; | |
147 | |
148 if (width <= 1) | |
149 { | |
150 width = 1; | |
151 } | |
152 | |
153 SetWindowing(center, width); | |
154 } | |
155 } | |
156 | |
157 void GrayscaleWindowingSceneTracker::Cancel() | |
158 { | |
159 SetWindowing(originalCenter_, originalWidth_); | |
160 } | |
161 } |