Mercurial > hg > orthanc-stone
annotate Framework/Widgets/WorldSceneWidget.cpp @ 53:c2dc924f1a63 wasm
removing threading out of the framework
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 27 Apr 2017 16:57:49 +0200 |
| parents | 25befef48c35 |
| children | 01aa453d4d5b |
| rev | line source |
|---|---|
| 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 { | |
| 371 interactor_->MouseOver(context, *this, GetSlice(), view, x, y, GetStatusBar()); | |
| 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 { | |
| 383 return interactor_->CreateMouseTracker(*this, GetSlice(), view, button, x, y, GetStatusBar()); | |
| 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 } |