Mercurial > hg > orthanc-stone
annotate Framework/Widgets/WorldSceneWidget.cpp @ 59:d2adc6189a95 wasm
refactoring
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 10 May 2017 11:34:06 +0200 |
parents | f0f354a97581 |
children | ca644004d2ee |
rev | line source |
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0 | 1 /** |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
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5 * Copyright (C) 2017 Osimis, Belgium |
0 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
47 | 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. | |
0 | 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 | |
47 | 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 | |
0 | 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 **/ | |
20 | |
21 | |
22 #include "WorldSceneWidget.h" | |
23 | |
16 | 24 #include "../../Resources/Orthanc/Core/OrthancException.h" |
0 | 25 |
26 namespace OrthancStone | |
27 { | |
28 static void MapMouseToScene(double& sceneX, | |
29 double& sceneY, | |
30 const ViewportGeometry& view, | |
31 int mouseX, | |
32 int mouseY) | |
33 { | |
34 // Take the center of the pixel | |
35 double x, y; | |
36 x = static_cast<double>(mouseX) + 0.5; | |
37 y = static_cast<double>(mouseY) + 0.5; | |
38 | |
39 view.MapDisplayToScene(sceneX, sceneY, x, y); | |
40 } | |
41 | |
42 | |
43 struct WorldSceneWidget::ViewChangeFunctor | |
44 { | |
45 const ViewportGeometry& view_; | |
46 | |
47 ViewChangeFunctor(const ViewportGeometry& view) : | |
48 view_(view) | |
49 { | |
50 } | |
51 | |
52 void operator() (IWorldObserver& observer, | |
53 const WorldSceneWidget& source) | |
54 { | |
55 observer.NotifyViewChange(source, view_); | |
56 } | |
57 }; | |
58 | |
59 | |
60 struct WorldSceneWidget::SizeChangeFunctor | |
61 { | |
62 ViewportGeometry& view_; | |
63 | |
64 SizeChangeFunctor(ViewportGeometry& view) : | |
65 view_(view) | |
66 { | |
67 } | |
68 | |
69 void operator() (IWorldObserver& observer, | |
70 const WorldSceneWidget& source) | |
71 { | |
72 observer.NotifySizeChange(source, view_); | |
73 } | |
74 }; | |
75 | |
76 | |
77 class WorldSceneWidget::SceneMouseTracker : public IMouseTracker | |
78 { | |
79 private: | |
80 ViewportGeometry view_; | |
81 std::auto_ptr<IWorldSceneMouseTracker> tracker_; | |
82 | |
83 public: | |
84 SceneMouseTracker(const ViewportGeometry& view, | |
85 IWorldSceneMouseTracker* tracker) : | |
86 view_(view), | |
87 tracker_(tracker) | |
88 { | |
89 assert(tracker != NULL); | |
90 } | |
91 | |
92 virtual void Render(Orthanc::ImageAccessor& target) | |
93 { | |
94 CairoSurface surface(target); | |
95 CairoContext context(surface); | |
96 view_.ApplyTransform(context); | |
97 tracker_->Render(context, view_.GetZoom()); | |
98 } | |
99 | |
100 virtual void MouseUp() | |
101 { | |
102 tracker_->MouseUp(); | |
103 } | |
104 | |
105 virtual void MouseMove(int x, | |
106 int y) | |
107 { | |
108 double sceneX, sceneY; | |
109 MapMouseToScene(sceneX, sceneY, view_, x, y); | |
110 tracker_->MouseMove(sceneX, sceneY); | |
111 } | |
112 }; | |
113 | |
114 | |
115 class WorldSceneWidget::PanMouseTracker : public IMouseTracker | |
116 { | |
117 private: | |
118 WorldSceneWidget& that_; | |
119 double previousPanX_; | |
120 double previousPanY_; | |
121 double downX_; | |
122 double downY_; | |
123 | |
124 public: | |
125 PanMouseTracker(WorldSceneWidget& that, | |
126 int x, | |
127 int y) : | |
128 that_(that), | |
129 downX_(x), | |
130 downY_(y) | |
131 { | |
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132 that_.view_.GetPan(previousPanX_, previousPanY_); |
0 | 133 } |
134 | |
135 virtual void Render(Orthanc::ImageAccessor& surface) | |
136 { | |
137 } | |
138 | |
139 virtual void MouseUp() | |
140 { | |
141 } | |
142 | |
143 virtual void MouseMove(int x, | |
144 int y) | |
145 { | |
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146 that_.view_.SetPan(previousPanX_ + x - downX_, |
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147 previousPanY_ + y - downY_); |
0 | 148 |
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149 ViewChangeFunctor functor(that_.view_); |
0 | 150 that_.observers_.Notify(&that_, functor); |
151 } | |
152 }; | |
153 | |
154 | |
155 class WorldSceneWidget::ZoomMouseTracker : public IMouseTracker | |
156 { | |
157 private: | |
158 WorldSceneWidget& that_; | |
159 int downX_; | |
160 int downY_; | |
161 double centerX_; | |
162 double centerY_; | |
163 double oldZoom_; | |
164 | |
165 public: | |
166 ZoomMouseTracker(WorldSceneWidget& that, | |
167 int x, | |
168 int y) : | |
169 that_(that), | |
170 downX_(x), | |
171 downY_(y) | |
172 { | |
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173 oldZoom_ = that_.view_.GetZoom(); |
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174 MapMouseToScene(centerX_, centerY_, that_.view_, downX_, downY_); |
0 | 175 } |
176 | |
177 virtual void Render(Orthanc::ImageAccessor& surface) | |
178 { | |
179 } | |
180 | |
181 virtual void MouseUp() | |
182 { | |
183 } | |
184 | |
185 virtual void MouseMove(int x, | |
186 int y) | |
187 { | |
188 static const double MIN_ZOOM = -4; | |
189 static const double MAX_ZOOM = 4; | |
190 | |
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191 if (that_.view_.GetDisplayHeight() <= 3) |
0 | 192 { |
193 return; // Cannot zoom on such a small image | |
194 } | |
195 | |
196 double dy = (static_cast<double>(y - downY_) / | |
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197 static_cast<double>(that_.view_.GetDisplayHeight() - 1)); // In the range [-1,1] |
0 | 198 double z; |
199 | |
200 // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM] | |
201 if (dy < -1.0) | |
202 { | |
203 z = MIN_ZOOM; | |
204 } | |
205 else if (dy > 1.0) | |
206 { | |
207 z = MAX_ZOOM; | |
208 } | |
209 else | |
210 { | |
211 z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0; | |
212 } | |
213 | |
214 z = pow(2.0, z); | |
215 | |
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216 that_.view_.SetZoom(oldZoom_ * z); |
0 | 217 |
218 // Correct the pan so that the original click point is kept at | |
219 // the same location on the display | |
220 double panX, panY; | |
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221 that_.view_.GetPan(panX, panY); |
0 | 222 |
223 int tx, ty; | |
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224 that_.view_.MapSceneToDisplay(tx, ty, centerX_, centerY_); |
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225 that_.view_.SetPan(panX + static_cast<double>(downX_ - tx), |
0 | 226 panY + static_cast<double>(downY_ - ty)); |
227 | |
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228 ViewChangeFunctor functor(that_.view_); |
0 | 229 that_.observers_.Notify(&that_, functor); |
230 } | |
231 }; | |
232 | |
233 | |
234 bool WorldSceneWidget::RenderCairo(CairoContext& context) | |
235 { | |
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236 view_.ApplyTransform(context); |
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237 return RenderScene(context, view_); |
0 | 238 } |
239 | |
240 | |
241 void WorldSceneWidget::RenderMouseOverCairo(CairoContext& context, | |
242 int x, | |
243 int y) | |
244 { | |
245 ViewportGeometry view = GetView(); | |
246 view.ApplyTransform(context); | |
247 | |
248 double sceneX, sceneY; | |
249 MapMouseToScene(sceneX, sceneY, view, x, y); | |
250 RenderSceneMouseOver(context, view, sceneX, sceneY); | |
251 } | |
252 | |
253 | |
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254 void WorldSceneWidget::SetSceneExtent(ViewportGeometry& view) |
0 | 255 { |
256 double x1, y1, x2, y2; | |
257 GetSceneExtent(x1, y1, x2, y2); | |
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258 view.SetSceneExtent(x1, y1, x2, y2); |
0 | 259 } |
260 | |
261 | |
262 void WorldSceneWidget::SetSize(unsigned int width, | |
263 unsigned int height) | |
264 { | |
265 CairoWidget::SetSize(width, height); | |
266 | |
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267 view_.SetDisplaySize(width, height); |
0 | 268 |
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269 if (observers_.IsEmpty()) |
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270 { |
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271 // Without a size observer, use the default view |
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272 view_.SetDefaultView(); |
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273 } |
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274 else |
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275 { |
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276 // With a size observer, let it decide which view to use |
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277 SizeChangeFunctor functor(view_); |
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278 observers_.Notify(this, functor); |
0 | 279 } |
280 } | |
281 | |
282 | |
283 void WorldSceneWidget::SetInteractor(IWorldSceneInteractor& interactor) | |
284 { | |
285 if (IsStarted()) | |
286 { | |
287 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
288 } | |
289 | |
290 interactor_ = &interactor; | |
291 } | |
292 | |
293 | |
294 void WorldSceneWidget::Start() | |
295 { | |
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296 SetSceneExtent(view_); |
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297 |
0 | 298 WidgetBase::Start(); |
299 | |
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300 ViewChangeFunctor functor(view_); |
0 | 301 observers_.Notify(this, functor); |
302 } | |
303 | |
304 | |
305 void WorldSceneWidget::SetDefaultView() | |
306 { | |
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307 SetSceneExtent(view_); |
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308 view_.SetDefaultView(); |
0 | 309 |
310 NotifyChange(); | |
311 | |
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312 ViewChangeFunctor functor(view_); |
0 | 313 observers_.Notify(this, functor); |
314 } | |
315 | |
316 | |
317 void WorldSceneWidget::SetView(const ViewportGeometry& view) | |
318 { | |
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319 view_ = view; |
0 | 320 |
321 NotifyChange(); | |
322 | |
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323 ViewChangeFunctor functor(view_); |
0 | 324 observers_.Notify(this, functor); |
325 } | |
326 | |
327 | |
328 ViewportGeometry WorldSceneWidget::GetView() | |
329 { | |
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330 return view_; |
0 | 331 } |
332 | |
333 | |
334 IMouseTracker* WorldSceneWidget::CreateMouseTracker(MouseButton button, | |
335 int x, | |
336 int y, | |
337 KeyboardModifiers modifiers) | |
338 { | |
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339 double sceneX, sceneY; |
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340 MapMouseToScene(sceneX, sceneY, view_, x, y); |
0 | 341 |
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342 std::auto_ptr<IWorldSceneMouseTracker> tracker |
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343 (CreateMouseSceneTracker(view_, button, sceneX, sceneY, modifiers)); |
0 | 344 |
345 if (tracker.get() != NULL) | |
346 { | |
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347 return new SceneMouseTracker(view_, tracker.release()); |
0 | 348 } |
349 | |
350 switch (button) | |
351 { | |
352 case MouseButton_Middle: | |
353 return new PanMouseTracker(*this, x, y); | |
354 | |
355 case MouseButton_Right: | |
356 return new ZoomMouseTracker(*this, x, y); | |
357 | |
358 default: | |
359 return NULL; | |
360 } | |
361 } | |
362 | |
363 | |
364 void WorldSceneWidget::RenderSceneMouseOver(CairoContext& context, | |
365 const ViewportGeometry& view, | |
366 double x, | |
367 double y) | |
368 { | |
369 if (interactor_) | |
370 { | |
59 | 371 interactor_->MouseOver(context, *this, view, x, y, GetStatusBar()); |
0 | 372 } |
373 } | |
374 | |
375 IWorldSceneMouseTracker* WorldSceneWidget::CreateMouseSceneTracker(const ViewportGeometry& view, | |
376 MouseButton button, | |
377 double x, | |
378 double y, | |
379 KeyboardModifiers modifiers) | |
380 { | |
381 if (interactor_) | |
382 { | |
59 | 383 return interactor_->CreateMouseTracker(*this, view, button, x, y, GetStatusBar()); |
0 | 384 } |
385 else | |
386 { | |
387 return NULL; | |
388 } | |
389 } | |
390 | |
391 | |
392 void WorldSceneWidget::MouseWheel(MouseWheelDirection direction, | |
393 int x, | |
394 int y, | |
395 KeyboardModifiers modifiers) | |
396 { | |
397 if (interactor_) | |
398 { | |
399 interactor_->MouseWheel(*this, direction, modifiers, GetStatusBar()); | |
400 } | |
401 } | |
402 | |
403 | |
404 void WorldSceneWidget::KeyPressed(char key, | |
405 KeyboardModifiers modifiers) | |
406 { | |
407 if (interactor_) | |
408 { | |
409 interactor_->KeyPressed(*this, key, modifiers, GetStatusBar()); | |
410 } | |
411 } | |
412 } |