Mercurial > hg > orthanc-stone
annotate Framework/Widgets/WorldSceneWidget.cpp @ 313:8bdc6112bc2e am-2
initial resize of canvas
| author | am@osimis.io |
|---|---|
| date | Wed, 03 Oct 2018 17:01:05 +0200 |
| parents | 300d8b8c48b3 |
| children | 8716176ff7f0 |
| 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) 2017-2018 Osimis S.A., 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. | |
| 281 | 16 * |
| 47 | 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 | |
|
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24 #include <math.h> |
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25 #include <memory> |
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26 #include <cassert> |
| 313 | 27 #include "Core/Logging.h" |
| 0 | 28 |
| 29 namespace OrthancStone | |
| 30 { | |
| 31 static void MapMouseToScene(double& sceneX, | |
| 32 double& sceneY, | |
| 33 const ViewportGeometry& view, | |
| 34 int mouseX, | |
| 35 int mouseY) | |
| 36 { | |
| 37 // Take the center of the pixel | |
| 38 double x, y; | |
| 39 x = static_cast<double>(mouseX) + 0.5; | |
| 40 y = static_cast<double>(mouseY) + 0.5; | |
| 41 | |
| 42 view.MapDisplayToScene(sceneX, sceneY, x, y); | |
| 43 } | |
| 44 | |
| 45 | |
| 46 struct WorldSceneWidget::SizeChangeFunctor | |
| 47 { | |
| 48 ViewportGeometry& view_; | |
| 49 | |
| 50 SizeChangeFunctor(ViewportGeometry& view) : | |
| 51 view_(view) | |
| 52 { | |
| 53 } | |
| 54 | |
| 55 void operator() (IWorldObserver& observer, | |
| 56 const WorldSceneWidget& source) | |
| 57 { | |
| 58 observer.NotifySizeChange(source, view_); | |
| 59 } | |
| 60 }; | |
| 61 | |
| 62 | |
| 281 | 63 // this is an adapter between a IWorldSceneMouseTracker |
| 64 // that is tracking a mouse in scene coordinates/mm and | |
| 65 // an IMouseTracker that is tracking a mouse | |
| 66 // in screen coordinates/pixels. | |
| 0 | 67 class WorldSceneWidget::SceneMouseTracker : public IMouseTracker |
| 68 { | |
| 69 private: | |
| 70 ViewportGeometry view_; | |
| 71 std::auto_ptr<IWorldSceneMouseTracker> tracker_; | |
| 281 | 72 |
| 0 | 73 public: |
| 74 SceneMouseTracker(const ViewportGeometry& view, | |
| 75 IWorldSceneMouseTracker* tracker) : | |
| 76 view_(view), | |
| 77 tracker_(tracker) | |
| 78 { | |
| 79 assert(tracker != NULL); | |
| 80 } | |
| 81 | |
| 82 virtual void Render(Orthanc::ImageAccessor& target) | |
| 83 { | |
| 84 CairoSurface surface(target); | |
| 281 | 85 CairoContext context(surface); |
| 0 | 86 view_.ApplyTransform(context); |
| 87 tracker_->Render(context, view_.GetZoom()); | |
| 88 } | |
| 89 | |
| 281 | 90 virtual void MouseUp() |
| 0 | 91 { |
| 92 tracker_->MouseUp(); | |
| 93 } | |
| 94 | |
| 281 | 95 virtual void MouseMove(int x, |
| 0 | 96 int y) |
| 97 { | |
| 98 double sceneX, sceneY; | |
| 99 MapMouseToScene(sceneX, sceneY, view_, x, y); | |
| 100 tracker_->MouseMove(sceneX, sceneY); | |
| 101 } | |
| 102 }; | |
| 103 | |
| 104 | |
| 281 | 105 WorldSceneWidget::PanMouseTracker::PanMouseTracker(WorldSceneWidget& that, |
| 106 int x, | |
| 107 int y) : | |
| 108 that_(that), | |
| 109 downX_(x), | |
| 110 downY_(y) | |
| 0 | 111 { |
| 281 | 112 that_.view_.GetPan(previousPanX_, previousPanY_); |
| 113 } | |
| 114 | |
| 115 void WorldSceneWidget::PanMouseTracker::MouseMove(int x, int y) | |
| 116 { | |
| 117 that_.view_.SetPan(previousPanX_ + x - downX_, | |
| 118 previousPanY_ + y - downY_); | |
| 119 | |
| 120 that_.observers_.Apply(that_, &IWorldObserver::NotifyViewChange, that_.view_); | |
| 121 } | |
| 0 | 122 |
| 281 | 123 WorldSceneWidget::ZoomMouseTracker::ZoomMouseTracker(WorldSceneWidget& that, |
| 124 int x, | |
| 125 int y) : | |
| 126 that_(that), | |
| 127 downX_(x), | |
| 128 downY_(y) | |
| 129 { | |
| 130 oldZoom_ = that_.view_.GetZoom(); | |
| 131 MapMouseToScene(centerX_, centerY_, that_.view_, downX_, downY_); | |
| 132 } | |
| 133 | |
| 134 void WorldSceneWidget::ZoomMouseTracker::MouseMove(int x, | |
| 135 int y) | |
| 136 { | |
| 137 static const double MIN_ZOOM = -4; | |
| 138 static const double MAX_ZOOM = 4; | |
| 139 | |
| 140 if (that_.view_.GetDisplayHeight() <= 3) | |
| 0 | 141 { |
| 313 | 142 LOG(WARNING) << "image is too small to zoom (current height = " << that_.view_.GetDisplayHeight() << ")"; |
| 143 return; | |
| 0 | 144 } |
| 145 | |
| 281 | 146 double dy = (static_cast<double>(y - downY_) / |
| 147 static_cast<double>(that_.view_.GetDisplayHeight() - 1)); // In the range [-1,1] | |
| 148 double z; | |
| 0 | 149 |
| 281 | 150 // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM] |
| 151 if (dy < -1.0) | |
| 0 | 152 { |
| 281 | 153 z = MIN_ZOOM; |
| 0 | 154 } |
| 281 | 155 else if (dy > 1.0) |
| 0 | 156 { |
| 281 | 157 z = MAX_ZOOM; |
| 0 | 158 } |
| 281 | 159 else |
| 0 | 160 { |
| 281 | 161 z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0; |
| 0 | 162 } |
| 163 | |
| 281 | 164 z = pow(2.0, z); |
| 0 | 165 |
| 281 | 166 that_.view_.SetZoom(oldZoom_ * z); |
| 0 | 167 |
| 281 | 168 // Correct the pan so that the original click point is kept at |
| 169 // the same location on the display | |
| 170 double panX, panY; | |
| 171 that_.view_.GetPan(panX, panY); | |
| 0 | 172 |
| 281 | 173 int tx, ty; |
| 174 that_.view_.MapSceneToDisplay(tx, ty, centerX_, centerY_); | |
| 175 that_.view_.SetPan(panX + static_cast<double>(downX_ - tx), | |
| 176 panY + static_cast<double>(downY_ - ty)); | |
| 0 | 177 |
| 281 | 178 that_.observers_.Apply(that_, &IWorldObserver::NotifyViewChange, that_.view_); |
| 179 } | |
| 0 | 180 |
| 181 | |
| 182 bool WorldSceneWidget::RenderCairo(CairoContext& context) | |
| 183 { | |
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184 view_.ApplyTransform(context); |
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185 return RenderScene(context, view_); |
| 0 | 186 } |
| 187 | |
| 188 | |
| 189 void WorldSceneWidget::RenderMouseOverCairo(CairoContext& context, | |
| 190 int x, | |
| 191 int y) | |
| 192 { | |
| 193 ViewportGeometry view = GetView(); | |
| 194 view.ApplyTransform(context); | |
| 195 | |
| 196 double sceneX, sceneY; | |
| 197 MapMouseToScene(sceneX, sceneY, view, x, y); | |
| 198 RenderSceneMouseOver(context, view, sceneX, sceneY); | |
| 199 } | |
| 200 | |
| 201 | |
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202 void WorldSceneWidget::SetSceneExtent(ViewportGeometry& view) |
| 0 | 203 { |
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204 view.SetSceneExtent(GetSceneExtent()); |
| 0 | 205 } |
| 206 | |
| 207 | |
| 208 void WorldSceneWidget::SetSize(unsigned int width, | |
| 209 unsigned int height) | |
| 210 { | |
| 211 CairoWidget::SetSize(width, height); | |
| 212 | |
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213 view_.SetDisplaySize(width, height); |
| 0 | 214 |
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215 if (observers_.IsEmpty()) |
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216 { |
| 66 | 217 // Without a size observer, reset to the default view |
| 218 // view_.SetDefaultView(); | |
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219 } |
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220 else |
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221 { |
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222 // With a size observer, let it decide which view to use |
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223 SizeChangeFunctor functor(view_); |
| 91 | 224 observers_.Notify(*this, functor); |
| 0 | 225 } |
| 226 } | |
| 227 | |
| 228 | |
| 229 void WorldSceneWidget::SetInteractor(IWorldSceneInteractor& interactor) | |
| 230 { | |
| 231 interactor_ = &interactor; | |
| 232 } | |
| 233 | |
| 234 | |
| 235 void WorldSceneWidget::SetDefaultView() | |
| 236 { | |
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237 SetSceneExtent(view_); |
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238 view_.SetDefaultView(); |
| 0 | 239 |
| 278 | 240 NotifyContentChanged(); |
| 0 | 241 |
| 91 | 242 observers_.Apply(*this, &IWorldObserver::NotifyViewChange, view_); |
| 0 | 243 } |
| 244 | |
| 245 | |
| 246 void WorldSceneWidget::SetView(const ViewportGeometry& view) | |
| 247 { | |
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248 view_ = view; |
| 0 | 249 |
| 278 | 250 NotifyContentChanged(); |
| 0 | 251 |
| 91 | 252 observers_.Apply(*this, &IWorldObserver::NotifyViewChange, view_); |
| 0 | 253 } |
| 254 | |
| 255 | |
| 256 ViewportGeometry WorldSceneWidget::GetView() | |
| 257 { | |
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258 return view_; |
| 0 | 259 } |
| 260 | |
| 261 | |
| 262 IMouseTracker* WorldSceneWidget::CreateMouseTracker(MouseButton button, | |
| 263 int x, | |
| 264 int y, | |
| 265 KeyboardModifiers modifiers) | |
| 266 { | |
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267 double sceneX, sceneY; |
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268 MapMouseToScene(sceneX, sceneY, view_, x, y); |
| 0 | 269 |
| 281 | 270 // asks the Widget Interactor to provide a mouse tracker |
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271 std::auto_ptr<IWorldSceneMouseTracker> tracker |
| 281 | 272 (CreateMouseSceneTracker(view_, button, sceneX, sceneY, modifiers)); |
| 0 | 273 |
| 274 if (tracker.get() != NULL) | |
| 275 { | |
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276 return new SceneMouseTracker(view_, tracker.release()); |
| 0 | 277 } |
| 281 | 278 //TODO: allow Interactor to create Pan & Zoom |
| 0 | 279 switch (button) |
| 280 { | |
| 281 | 281 case MouseButton_Middle: |
| 282 return new PanMouseTracker(*this, x, y); | |
| 0 | 283 |
| 281 | 284 case MouseButton_Right: |
| 285 return new ZoomMouseTracker(*this, x, y); | |
| 0 | 286 |
| 281 | 287 default: |
| 288 return NULL; | |
| 0 | 289 } |
| 290 } | |
| 291 | |
| 292 | |
| 293 void WorldSceneWidget::RenderSceneMouseOver(CairoContext& context, | |
| 294 const ViewportGeometry& view, | |
| 295 double x, | |
| 296 double y) | |
| 297 { | |
| 298 if (interactor_) | |
| 299 { | |
| 59 | 300 interactor_->MouseOver(context, *this, view, x, y, GetStatusBar()); |
| 0 | 301 } |
| 302 } | |
| 303 | |
| 304 IWorldSceneMouseTracker* WorldSceneWidget::CreateMouseSceneTracker(const ViewportGeometry& view, | |
| 305 MouseButton button, | |
| 306 double x, | |
| 307 double y, | |
| 308 KeyboardModifiers modifiers) | |
| 309 { | |
| 310 if (interactor_) | |
| 311 { | |
| 281 | 312 return interactor_->CreateMouseTracker(*this, view, button, modifiers, x, y, GetStatusBar()); |
| 0 | 313 } |
| 314 else | |
| 315 { | |
| 316 return NULL; | |
| 317 } | |
| 318 } | |
| 319 | |
| 320 | |
| 321 void WorldSceneWidget::MouseWheel(MouseWheelDirection direction, | |
| 322 int x, | |
| 323 int y, | |
| 281 | 324 KeyboardModifiers modifiers) |
| 0 | 325 { |
| 326 if (interactor_) | |
| 327 { | |
| 328 interactor_->MouseWheel(*this, direction, modifiers, GetStatusBar()); | |
| 329 } | |
| 330 } | |
| 331 | |
| 332 | |
| 333 void WorldSceneWidget::KeyPressed(char key, | |
| 334 KeyboardModifiers modifiers) | |
| 335 { | |
| 336 if (interactor_) | |
| 337 { | |
| 338 interactor_->KeyPressed(*this, key, modifiers, GetStatusBar()); | |
| 339 } | |
| 340 } | |
| 341 } |