Mercurial > hg > orthanc-stone
annotate Framework/Widgets/WorldSceneWidget.cpp @ 109:53bd9277b025 wasm
using the Extent class
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 14 Jun 2017 15:34:08 +0200 |
| parents | 81f73efd81a1 |
| children | 53025eecbc95 |
| 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 | |
| 24 namespace OrthancStone | |
| 25 { | |
| 26 static void MapMouseToScene(double& sceneX, | |
| 27 double& sceneY, | |
| 28 const ViewportGeometry& view, | |
| 29 int mouseX, | |
| 30 int mouseY) | |
| 31 { | |
| 32 // Take the center of the pixel | |
| 33 double x, y; | |
| 34 x = static_cast<double>(mouseX) + 0.5; | |
| 35 y = static_cast<double>(mouseY) + 0.5; | |
| 36 | |
| 37 view.MapDisplayToScene(sceneX, sceneY, x, y); | |
| 38 } | |
| 39 | |
| 40 | |
| 41 struct WorldSceneWidget::SizeChangeFunctor | |
| 42 { | |
| 43 ViewportGeometry& view_; | |
| 44 | |
| 45 SizeChangeFunctor(ViewportGeometry& view) : | |
| 46 view_(view) | |
| 47 { | |
| 48 } | |
| 49 | |
| 50 void operator() (IWorldObserver& observer, | |
| 51 const WorldSceneWidget& source) | |
| 52 { | |
| 53 observer.NotifySizeChange(source, view_); | |
| 54 } | |
| 55 }; | |
| 56 | |
| 57 | |
| 58 class WorldSceneWidget::SceneMouseTracker : public IMouseTracker | |
| 59 { | |
| 60 private: | |
| 61 ViewportGeometry view_; | |
| 62 std::auto_ptr<IWorldSceneMouseTracker> tracker_; | |
| 63 | |
| 64 public: | |
| 65 SceneMouseTracker(const ViewportGeometry& view, | |
| 66 IWorldSceneMouseTracker* tracker) : | |
| 67 view_(view), | |
| 68 tracker_(tracker) | |
| 69 { | |
| 70 assert(tracker != NULL); | |
| 71 } | |
| 72 | |
| 73 virtual void Render(Orthanc::ImageAccessor& target) | |
| 74 { | |
| 75 CairoSurface surface(target); | |
| 76 CairoContext context(surface); | |
| 77 view_.ApplyTransform(context); | |
| 78 tracker_->Render(context, view_.GetZoom()); | |
| 79 } | |
| 80 | |
| 81 virtual void MouseUp() | |
| 82 { | |
| 83 tracker_->MouseUp(); | |
| 84 } | |
| 85 | |
| 86 virtual void MouseMove(int x, | |
| 87 int y) | |
| 88 { | |
| 89 double sceneX, sceneY; | |
| 90 MapMouseToScene(sceneX, sceneY, view_, x, y); | |
| 91 tracker_->MouseMove(sceneX, sceneY); | |
| 92 } | |
| 93 }; | |
| 94 | |
| 95 | |
| 96 class WorldSceneWidget::PanMouseTracker : public IMouseTracker | |
| 97 { | |
| 98 private: | |
| 99 WorldSceneWidget& that_; | |
| 100 double previousPanX_; | |
| 101 double previousPanY_; | |
| 102 double downX_; | |
| 103 double downY_; | |
| 104 | |
| 105 public: | |
| 106 PanMouseTracker(WorldSceneWidget& that, | |
| 107 int x, | |
| 108 int y) : | |
| 109 that_(that), | |
| 110 downX_(x), | |
| 111 downY_(y) | |
| 112 { | |
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113 that_.view_.GetPan(previousPanX_, previousPanY_); |
| 0 | 114 } |
| 115 | |
| 116 virtual void Render(Orthanc::ImageAccessor& surface) | |
| 117 { | |
| 118 } | |
| 119 | |
| 120 virtual void MouseUp() | |
| 121 { | |
| 122 } | |
| 123 | |
| 124 virtual void MouseMove(int x, | |
| 125 int y) | |
| 126 { | |
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127 that_.view_.SetPan(previousPanX_ + x - downX_, |
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128 previousPanY_ + y - downY_); |
| 0 | 129 |
| 91 | 130 that_.observers_.Apply(that_, &IWorldObserver::NotifyViewChange, that_.view_); |
| 0 | 131 } |
| 132 }; | |
| 133 | |
| 134 | |
| 135 class WorldSceneWidget::ZoomMouseTracker : public IMouseTracker | |
| 136 { | |
| 137 private: | |
| 138 WorldSceneWidget& that_; | |
| 139 int downX_; | |
| 140 int downY_; | |
| 141 double centerX_; | |
| 142 double centerY_; | |
| 143 double oldZoom_; | |
| 144 | |
| 145 public: | |
| 146 ZoomMouseTracker(WorldSceneWidget& that, | |
| 147 int x, | |
| 148 int y) : | |
| 149 that_(that), | |
| 150 downX_(x), | |
| 151 downY_(y) | |
| 152 { | |
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153 oldZoom_ = that_.view_.GetZoom(); |
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154 MapMouseToScene(centerX_, centerY_, that_.view_, downX_, downY_); |
| 0 | 155 } |
| 156 | |
| 157 virtual void Render(Orthanc::ImageAccessor& surface) | |
| 158 { | |
| 159 } | |
| 160 | |
| 161 virtual void MouseUp() | |
| 162 { | |
| 163 } | |
| 164 | |
| 165 virtual void MouseMove(int x, | |
| 166 int y) | |
| 167 { | |
| 168 static const double MIN_ZOOM = -4; | |
| 169 static const double MAX_ZOOM = 4; | |
| 170 | |
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171 if (that_.view_.GetDisplayHeight() <= 3) |
| 0 | 172 { |
| 173 return; // Cannot zoom on such a small image | |
| 174 } | |
| 175 | |
| 176 double dy = (static_cast<double>(y - downY_) / | |
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177 static_cast<double>(that_.view_.GetDisplayHeight() - 1)); // In the range [-1,1] |
| 0 | 178 double z; |
| 179 | |
| 180 // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM] | |
| 181 if (dy < -1.0) | |
| 182 { | |
| 183 z = MIN_ZOOM; | |
| 184 } | |
| 185 else if (dy > 1.0) | |
| 186 { | |
| 187 z = MAX_ZOOM; | |
| 188 } | |
| 189 else | |
| 190 { | |
| 191 z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0; | |
| 192 } | |
| 193 | |
| 194 z = pow(2.0, z); | |
| 195 | |
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196 that_.view_.SetZoom(oldZoom_ * z); |
| 0 | 197 |
| 198 // Correct the pan so that the original click point is kept at | |
| 199 // the same location on the display | |
| 200 double panX, panY; | |
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201 that_.view_.GetPan(panX, panY); |
| 0 | 202 |
| 203 int tx, ty; | |
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204 that_.view_.MapSceneToDisplay(tx, ty, centerX_, centerY_); |
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205 that_.view_.SetPan(panX + static_cast<double>(downX_ - tx), |
| 0 | 206 panY + static_cast<double>(downY_ - ty)); |
| 207 | |
| 91 | 208 that_.observers_.Apply(that_, &IWorldObserver::NotifyViewChange, that_.view_); |
| 0 | 209 } |
| 210 }; | |
| 211 | |
| 212 | |
| 213 bool WorldSceneWidget::RenderCairo(CairoContext& context) | |
| 214 { | |
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215 view_.ApplyTransform(context); |
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216 return RenderScene(context, view_); |
| 0 | 217 } |
| 218 | |
| 219 | |
| 220 void WorldSceneWidget::RenderMouseOverCairo(CairoContext& context, | |
| 221 int x, | |
| 222 int y) | |
| 223 { | |
| 224 ViewportGeometry view = GetView(); | |
| 225 view.ApplyTransform(context); | |
| 226 | |
| 227 double sceneX, sceneY; | |
| 228 MapMouseToScene(sceneX, sceneY, view, x, y); | |
| 229 RenderSceneMouseOver(context, view, sceneX, sceneY); | |
| 230 } | |
| 231 | |
| 232 | |
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233 void WorldSceneWidget::SetSceneExtent(ViewportGeometry& view) |
| 0 | 234 { |
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235 view.SetSceneExtent(GetSceneExtent()); |
| 0 | 236 } |
| 237 | |
| 238 | |
| 239 void WorldSceneWidget::SetSize(unsigned int width, | |
| 240 unsigned int height) | |
| 241 { | |
| 242 CairoWidget::SetSize(width, height); | |
| 243 | |
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244 view_.SetDisplaySize(width, height); |
| 0 | 245 |
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246 if (observers_.IsEmpty()) |
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247 { |
| 66 | 248 // Without a size observer, reset to the default view |
| 249 // view_.SetDefaultView(); | |
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250 } |
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251 else |
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252 { |
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253 // With a size observer, let it decide which view to use |
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254 SizeChangeFunctor functor(view_); |
| 91 | 255 observers_.Notify(*this, functor); |
| 0 | 256 } |
| 257 } | |
| 258 | |
| 259 | |
| 260 void WorldSceneWidget::SetInteractor(IWorldSceneInteractor& interactor) | |
| 261 { | |
| 262 interactor_ = &interactor; | |
| 263 } | |
| 264 | |
| 265 | |
| 266 void WorldSceneWidget::SetDefaultView() | |
| 267 { | |
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268 SetSceneExtent(view_); |
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269 view_.SetDefaultView(); |
| 0 | 270 |
| 271 NotifyChange(); | |
| 272 | |
| 91 | 273 observers_.Apply(*this, &IWorldObserver::NotifyViewChange, view_); |
| 0 | 274 } |
| 275 | |
| 276 | |
| 277 void WorldSceneWidget::SetView(const ViewportGeometry& view) | |
| 278 { | |
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279 view_ = view; |
| 0 | 280 |
| 281 NotifyChange(); | |
| 282 | |
| 91 | 283 observers_.Apply(*this, &IWorldObserver::NotifyViewChange, view_); |
| 0 | 284 } |
| 285 | |
| 286 | |
| 287 ViewportGeometry WorldSceneWidget::GetView() | |
| 288 { | |
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289 return view_; |
| 0 | 290 } |
| 291 | |
| 292 | |
| 293 IMouseTracker* WorldSceneWidget::CreateMouseTracker(MouseButton button, | |
| 294 int x, | |
| 295 int y, | |
| 296 KeyboardModifiers modifiers) | |
| 297 { | |
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298 double sceneX, sceneY; |
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299 MapMouseToScene(sceneX, sceneY, view_, x, y); |
| 0 | 300 |
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301 std::auto_ptr<IWorldSceneMouseTracker> tracker |
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302 (CreateMouseSceneTracker(view_, button, sceneX, sceneY, modifiers)); |
| 0 | 303 |
| 304 if (tracker.get() != NULL) | |
| 305 { | |
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306 return new SceneMouseTracker(view_, tracker.release()); |
| 0 | 307 } |
| 308 | |
| 309 switch (button) | |
| 310 { | |
| 311 case MouseButton_Middle: | |
| 312 return new PanMouseTracker(*this, x, y); | |
| 313 | |
| 314 case MouseButton_Right: | |
| 315 return new ZoomMouseTracker(*this, x, y); | |
| 316 | |
| 317 default: | |
| 318 return NULL; | |
| 319 } | |
| 320 } | |
| 321 | |
| 322 | |
| 323 void WorldSceneWidget::RenderSceneMouseOver(CairoContext& context, | |
| 324 const ViewportGeometry& view, | |
| 325 double x, | |
| 326 double y) | |
| 327 { | |
| 328 if (interactor_) | |
| 329 { | |
| 59 | 330 interactor_->MouseOver(context, *this, view, x, y, GetStatusBar()); |
| 0 | 331 } |
| 332 } | |
| 333 | |
| 334 IWorldSceneMouseTracker* WorldSceneWidget::CreateMouseSceneTracker(const ViewportGeometry& view, | |
| 335 MouseButton button, | |
| 336 double x, | |
| 337 double y, | |
| 338 KeyboardModifiers modifiers) | |
| 339 { | |
| 340 if (interactor_) | |
| 341 { | |
| 59 | 342 return interactor_->CreateMouseTracker(*this, view, button, x, y, GetStatusBar()); |
| 0 | 343 } |
| 344 else | |
| 345 { | |
| 346 return NULL; | |
| 347 } | |
| 348 } | |
| 349 | |
| 350 | |
| 351 void WorldSceneWidget::MouseWheel(MouseWheelDirection direction, | |
| 352 int x, | |
| 353 int y, | |
| 354 KeyboardModifiers modifiers) | |
| 355 { | |
| 356 if (interactor_) | |
| 357 { | |
| 358 interactor_->MouseWheel(*this, direction, modifiers, GetStatusBar()); | |
| 359 } | |
| 360 } | |
| 361 | |
| 362 | |
| 363 void WorldSceneWidget::KeyPressed(char key, | |
| 364 KeyboardModifiers modifiers) | |
| 365 { | |
| 366 if (interactor_) | |
| 367 { | |
| 368 interactor_->KeyPressed(*this, key, modifiers, GetStatusBar()); | |
| 369 } | |
| 370 } | |
| 371 } |