Mercurial > hg > orthanc-stone
annotate Framework/Widgets/WorldSceneWidget.cpp @ 40:7207a407bcd8
shared copyright with osimis
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 04 Jan 2017 16:37:42 +0100 |
| parents | ff1e935768e7 |
| children | 766d31dc5716 28956ed68280 |
| 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 | |
|
40
7207a407bcd8
shared copyright with osimis
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
16
diff
changeset
|
5 * Copyright (C) 2017 Osimis, Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU General Public License as | |
| 9 * published by the Free Software Foundation, either version 3 of the | |
| 10 * License, or (at your option) any later version. | |
| 11 * | |
| 12 * In addition, as a special exception, the copyright holders of this | |
| 13 * program give permission to link the code of its release with the | |
| 14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 15 * that use the same license as the "OpenSSL" library), and distribute | |
| 16 * the linked executables. You must obey the GNU General Public License | |
| 17 * in all respects for all of the code used other than "OpenSSL". If you | |
| 18 * modify file(s) with this exception, you may extend this exception to | |
| 19 * your version of the file(s), but you are not obligated to do so. If | |
| 20 * you do not wish to do so, delete this exception statement from your | |
| 21 * version. If you delete this exception statement from all source files | |
| 22 * in the program, then also delete it here. | |
| 23 * | |
| 24 * This program is distributed in the hope that it will be useful, but | |
| 25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 27 * General Public License for more details. | |
| 28 * | |
| 29 * You should have received a copy of the GNU General Public License | |
| 30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 31 **/ | |
| 32 | |
| 33 | |
| 34 #include "WorldSceneWidget.h" | |
| 35 | |
| 16 | 36 #include "../../Resources/Orthanc/Core/OrthancException.h" |
| 0 | 37 |
| 38 namespace OrthancStone | |
| 39 { | |
| 40 static void MapMouseToScene(double& sceneX, | |
| 41 double& sceneY, | |
| 42 const ViewportGeometry& view, | |
| 43 int mouseX, | |
| 44 int mouseY) | |
| 45 { | |
| 46 // Take the center of the pixel | |
| 47 double x, y; | |
| 48 x = static_cast<double>(mouseX) + 0.5; | |
| 49 y = static_cast<double>(mouseY) + 0.5; | |
| 50 | |
| 51 view.MapDisplayToScene(sceneX, sceneY, x, y); | |
| 52 } | |
| 53 | |
| 54 | |
| 55 struct WorldSceneWidget::ViewChangeFunctor | |
| 56 { | |
| 57 const ViewportGeometry& view_; | |
| 58 | |
| 59 ViewChangeFunctor(const ViewportGeometry& view) : | |
| 60 view_(view) | |
| 61 { | |
| 62 } | |
| 63 | |
| 64 void operator() (IWorldObserver& observer, | |
| 65 const WorldSceneWidget& source) | |
| 66 { | |
| 67 observer.NotifyViewChange(source, view_); | |
| 68 } | |
| 69 }; | |
| 70 | |
| 71 | |
| 72 struct WorldSceneWidget::SizeChangeFunctor | |
| 73 { | |
| 74 ViewportGeometry& view_; | |
| 75 | |
| 76 SizeChangeFunctor(ViewportGeometry& view) : | |
| 77 view_(view) | |
| 78 { | |
| 79 } | |
| 80 | |
| 81 void operator() (IWorldObserver& observer, | |
| 82 const WorldSceneWidget& source) | |
| 83 { | |
| 84 observer.NotifySizeChange(source, view_); | |
| 85 } | |
| 86 }; | |
| 87 | |
| 88 | |
| 89 class WorldSceneWidget::SceneMouseTracker : public IMouseTracker | |
| 90 { | |
| 91 private: | |
| 92 ViewportGeometry view_; | |
| 93 std::auto_ptr<IWorldSceneMouseTracker> tracker_; | |
| 94 | |
| 95 public: | |
| 96 SceneMouseTracker(const ViewportGeometry& view, | |
| 97 IWorldSceneMouseTracker* tracker) : | |
| 98 view_(view), | |
| 99 tracker_(tracker) | |
| 100 { | |
| 101 assert(tracker != NULL); | |
| 102 } | |
| 103 | |
| 104 virtual void Render(Orthanc::ImageAccessor& target) | |
| 105 { | |
| 106 CairoSurface surface(target); | |
| 107 CairoContext context(surface); | |
| 108 view_.ApplyTransform(context); | |
| 109 tracker_->Render(context, view_.GetZoom()); | |
| 110 } | |
| 111 | |
| 112 virtual void MouseUp() | |
| 113 { | |
| 114 tracker_->MouseUp(); | |
| 115 } | |
| 116 | |
| 117 virtual void MouseMove(int x, | |
| 118 int y) | |
| 119 { | |
| 120 double sceneX, sceneY; | |
| 121 MapMouseToScene(sceneX, sceneY, view_, x, y); | |
| 122 tracker_->MouseMove(sceneX, sceneY); | |
| 123 } | |
| 124 }; | |
| 125 | |
| 126 | |
| 127 class WorldSceneWidget::PanMouseTracker : public IMouseTracker | |
| 128 { | |
| 129 private: | |
| 130 WorldSceneWidget& that_; | |
| 131 double previousPanX_; | |
| 132 double previousPanY_; | |
| 133 double downX_; | |
| 134 double downY_; | |
| 135 | |
| 136 public: | |
| 137 PanMouseTracker(WorldSceneWidget& that, | |
| 138 int x, | |
| 139 int y) : | |
| 140 that_(that), | |
| 141 downX_(x), | |
| 142 downY_(y) | |
| 143 { | |
| 144 SharedValue<ViewportGeometry>::Locker locker(that_.view_); | |
| 145 locker.GetValue().GetPan(previousPanX_, previousPanY_); | |
| 146 } | |
| 147 | |
| 148 virtual void Render(Orthanc::ImageAccessor& surface) | |
| 149 { | |
| 150 } | |
| 151 | |
| 152 virtual void MouseUp() | |
| 153 { | |
| 154 } | |
| 155 | |
| 156 virtual void MouseMove(int x, | |
| 157 int y) | |
| 158 { | |
| 159 SharedValue<ViewportGeometry>::Locker locker(that_.view_); | |
| 160 locker.GetValue().SetPan(previousPanX_ + x - downX_, | |
| 161 previousPanY_ + y - downY_); | |
| 162 | |
| 163 ViewChangeFunctor functor(locker.GetValue()); | |
| 164 that_.observers_.Notify(&that_, functor); | |
| 165 } | |
| 166 }; | |
| 167 | |
| 168 | |
| 169 class WorldSceneWidget::ZoomMouseTracker : public IMouseTracker | |
| 170 { | |
| 171 private: | |
| 172 WorldSceneWidget& that_; | |
| 173 int downX_; | |
| 174 int downY_; | |
| 175 double centerX_; | |
| 176 double centerY_; | |
| 177 double oldZoom_; | |
| 178 | |
| 179 public: | |
| 180 ZoomMouseTracker(WorldSceneWidget& that, | |
| 181 int x, | |
| 182 int y) : | |
| 183 that_(that), | |
| 184 downX_(x), | |
| 185 downY_(y) | |
| 186 { | |
| 187 SharedValue<ViewportGeometry>::Locker locker(that_.view_); | |
| 188 oldZoom_ = locker.GetValue().GetZoom(); | |
| 189 MapMouseToScene(centerX_, centerY_, locker.GetValue(), downX_, downY_); | |
| 190 } | |
| 191 | |
| 192 virtual void Render(Orthanc::ImageAccessor& surface) | |
| 193 { | |
| 194 } | |
| 195 | |
| 196 virtual void MouseUp() | |
| 197 { | |
| 198 } | |
| 199 | |
| 200 virtual void MouseMove(int x, | |
| 201 int y) | |
| 202 { | |
| 203 static const double MIN_ZOOM = -4; | |
| 204 static const double MAX_ZOOM = 4; | |
| 205 | |
| 206 SharedValue<ViewportGeometry>::Locker locker(that_.view_); | |
| 207 | |
| 208 if (locker.GetValue().GetDisplayHeight() <= 3) | |
| 209 { | |
| 210 return; // Cannot zoom on such a small image | |
| 211 } | |
| 212 | |
| 213 double dy = (static_cast<double>(y - downY_) / | |
| 214 static_cast<double>(locker.GetValue().GetDisplayHeight() - 1)); // In the range [-1,1] | |
| 215 double z; | |
| 216 | |
| 217 // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM] | |
| 218 if (dy < -1.0) | |
| 219 { | |
| 220 z = MIN_ZOOM; | |
| 221 } | |
| 222 else if (dy > 1.0) | |
| 223 { | |
| 224 z = MAX_ZOOM; | |
| 225 } | |
| 226 else | |
| 227 { | |
| 228 z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0; | |
| 229 } | |
| 230 | |
| 231 z = pow(2.0, z); | |
| 232 | |
| 233 locker.GetValue().SetZoom(oldZoom_ * z); | |
| 234 | |
| 235 // Correct the pan so that the original click point is kept at | |
| 236 // the same location on the display | |
| 237 double panX, panY; | |
| 238 locker.GetValue().GetPan(panX, panY); | |
| 239 | |
| 240 int tx, ty; | |
| 241 locker.GetValue().MapSceneToDisplay(tx, ty, centerX_, centerY_); | |
| 242 locker.GetValue().SetPan(panX + static_cast<double>(downX_ - tx), | |
| 243 panY + static_cast<double>(downY_ - ty)); | |
| 244 | |
| 245 ViewChangeFunctor functor(locker.GetValue()); | |
| 246 that_.observers_.Notify(&that_, functor); | |
| 247 } | |
| 248 }; | |
| 249 | |
| 250 | |
| 251 void WorldSceneWidget::UpdateStep() | |
| 252 { | |
| 253 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 254 } | |
| 255 | |
| 256 | |
| 257 bool WorldSceneWidget::RenderCairo(CairoContext& context) | |
| 258 { | |
| 259 ViewportGeometry view; | |
| 260 | |
| 261 { | |
| 262 SharedValue<ViewportGeometry>::Locker locker(view_); | |
| 263 view = locker.GetValue(); | |
| 264 } | |
| 265 | |
| 266 view.ApplyTransform(context); | |
| 267 | |
| 268 return RenderScene(context, view); | |
| 269 } | |
| 270 | |
| 271 | |
| 272 void WorldSceneWidget::RenderMouseOverCairo(CairoContext& context, | |
| 273 int x, | |
| 274 int y) | |
| 275 { | |
| 276 ViewportGeometry view = GetView(); | |
| 277 view.ApplyTransform(context); | |
| 278 | |
| 279 double sceneX, sceneY; | |
| 280 MapMouseToScene(sceneX, sceneY, view, x, y); | |
| 281 RenderSceneMouseOver(context, view, sceneX, sceneY); | |
| 282 } | |
| 283 | |
| 284 | |
| 285 void WorldSceneWidget::SetSceneExtent(SharedValue<ViewportGeometry>::Locker& locker) | |
| 286 { | |
| 287 double x1, y1, x2, y2; | |
| 288 GetSceneExtent(x1, y1, x2, y2); | |
| 289 locker.GetValue().SetSceneExtent(x1, y1, x2, y2); | |
| 290 } | |
| 291 | |
| 292 | |
| 293 void WorldSceneWidget::SetSize(unsigned int width, | |
| 294 unsigned int height) | |
| 295 { | |
| 296 CairoWidget::SetSize(width, height); | |
| 297 | |
| 298 { | |
| 299 SharedValue<ViewportGeometry>::Locker locker(view_); | |
| 300 locker.GetValue().SetDisplaySize(width, height); | |
| 301 | |
| 302 if (observers_.IsEmpty()) | |
| 303 { | |
| 304 // Without a size observer, use the default view | |
| 305 locker.GetValue().SetDefaultView(); | |
| 306 } | |
| 307 else | |
| 308 { | |
| 309 // With a size observer, let it decide which view to use | |
| 310 SizeChangeFunctor functor(locker.GetValue()); | |
| 311 observers_.Notify(this, functor); | |
| 312 } | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 | |
| 317 void WorldSceneWidget::SetInteractor(IWorldSceneInteractor& interactor) | |
| 318 { | |
| 319 if (IsStarted()) | |
| 320 { | |
| 321 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 322 } | |
| 323 | |
| 324 interactor_ = &interactor; | |
| 325 } | |
| 326 | |
| 327 | |
| 328 void WorldSceneWidget::Start() | |
| 329 { | |
| 330 ViewportGeometry geometry; | |
| 331 | |
| 332 { | |
| 333 SharedValue<ViewportGeometry>::Locker locker(view_); | |
| 334 SetSceneExtent(locker); | |
| 335 geometry = locker.GetValue(); | |
| 336 } | |
| 337 | |
| 338 WidgetBase::Start(); | |
| 339 | |
| 340 ViewChangeFunctor functor(geometry); | |
| 341 observers_.Notify(this, functor); | |
| 342 } | |
| 343 | |
| 344 | |
| 345 void WorldSceneWidget::SetDefaultView() | |
| 346 { | |
| 347 ViewportGeometry geometry; | |
| 348 | |
| 349 { | |
| 350 SharedValue<ViewportGeometry>::Locker locker(view_); | |
| 351 SetSceneExtent(locker); | |
| 352 locker.GetValue().SetDefaultView(); | |
| 353 geometry = locker.GetValue(); | |
| 354 } | |
| 355 | |
| 356 NotifyChange(); | |
| 357 | |
| 358 ViewChangeFunctor functor(geometry); | |
| 359 observers_.Notify(this, functor); | |
| 360 } | |
| 361 | |
| 362 | |
| 363 void WorldSceneWidget::SetView(const ViewportGeometry& view) | |
| 364 { | |
| 365 { | |
| 366 SharedValue<ViewportGeometry>::Locker locker(view_); | |
| 367 locker.GetValue() = view; | |
| 368 } | |
| 369 | |
| 370 NotifyChange(); | |
| 371 | |
| 372 ViewChangeFunctor functor(view); | |
| 373 observers_.Notify(this, functor); | |
| 374 } | |
| 375 | |
| 376 | |
| 377 ViewportGeometry WorldSceneWidget::GetView() | |
| 378 { | |
| 379 SharedValue<ViewportGeometry>::Locker locker(view_); | |
| 380 return locker.GetValue(); | |
| 381 } | |
| 382 | |
| 383 | |
| 384 IMouseTracker* WorldSceneWidget::CreateMouseTracker(MouseButton button, | |
| 385 int x, | |
| 386 int y, | |
| 387 KeyboardModifiers modifiers) | |
| 388 { | |
| 389 ViewportGeometry view = GetView(); | |
| 390 | |
| 391 double sceneX, sceneY; | |
| 392 MapMouseToScene(sceneX, sceneY, view, x, y); | |
| 393 | |
| 394 std::auto_ptr<IWorldSceneMouseTracker> tracker(CreateMouseSceneTracker(view, button, sceneX, sceneY, modifiers)); | |
| 395 if (tracker.get() != NULL) | |
| 396 { | |
| 397 return new SceneMouseTracker(view, tracker.release()); | |
| 398 } | |
| 399 | |
| 400 switch (button) | |
| 401 { | |
| 402 case MouseButton_Middle: | |
| 403 return new PanMouseTracker(*this, x, y); | |
| 404 | |
| 405 case MouseButton_Right: | |
| 406 return new ZoomMouseTracker(*this, x, y); | |
| 407 | |
| 408 default: | |
| 409 return NULL; | |
| 410 } | |
| 411 } | |
| 412 | |
| 413 | |
| 414 void WorldSceneWidget::RenderSceneMouseOver(CairoContext& context, | |
| 415 const ViewportGeometry& view, | |
| 416 double x, | |
| 417 double y) | |
| 418 { | |
| 419 if (interactor_) | |
| 420 { | |
| 421 interactor_->MouseOver(context, *this, GetSlice(), view, x, y, GetStatusBar()); | |
| 422 } | |
| 423 } | |
| 424 | |
| 425 IWorldSceneMouseTracker* WorldSceneWidget::CreateMouseSceneTracker(const ViewportGeometry& view, | |
| 426 MouseButton button, | |
| 427 double x, | |
| 428 double y, | |
| 429 KeyboardModifiers modifiers) | |
| 430 { | |
| 431 if (interactor_) | |
| 432 { | |
| 433 return interactor_->CreateMouseTracker(*this, GetSlice(), view, button, x, y, GetStatusBar()); | |
| 434 } | |
| 435 else | |
| 436 { | |
| 437 return NULL; | |
| 438 } | |
| 439 } | |
| 440 | |
| 441 | |
| 442 void WorldSceneWidget::MouseWheel(MouseWheelDirection direction, | |
| 443 int x, | |
| 444 int y, | |
| 445 KeyboardModifiers modifiers) | |
| 446 { | |
| 447 if (interactor_) | |
| 448 { | |
| 449 interactor_->MouseWheel(*this, direction, modifiers, GetStatusBar()); | |
| 450 } | |
| 451 } | |
| 452 | |
| 453 | |
| 454 void WorldSceneWidget::KeyPressed(char key, | |
| 455 KeyboardModifiers modifiers) | |
| 456 { | |
| 457 if (interactor_) | |
| 458 { | |
| 459 interactor_->KeyPressed(*this, key, modifiers, GetStatusBar()); | |
| 460 } | |
| 461 } | |
| 462 } |