Mercurial > hg > orthanc-stone
annotate Framework/Widgets/WorldSceneWidget.cpp @ 281:300d8b8c48b3 am-2
mouse tracker tuning
| author | am@osimis.io |
|---|---|
| date | Tue, 28 Aug 2018 10:01:31 +0200 |
| parents | 8a86695fcbc3 |
| children | 8bdc6112bc2e |
| 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> |
| 0 | 27 |
| 28 namespace OrthancStone | |
| 29 { | |
| 30 static void MapMouseToScene(double& sceneX, | |
| 31 double& sceneY, | |
| 32 const ViewportGeometry& view, | |
| 33 int mouseX, | |
| 34 int mouseY) | |
| 35 { | |
| 36 // Take the center of the pixel | |
| 37 double x, y; | |
| 38 x = static_cast<double>(mouseX) + 0.5; | |
| 39 y = static_cast<double>(mouseY) + 0.5; | |
| 40 | |
| 41 view.MapDisplayToScene(sceneX, sceneY, x, y); | |
| 42 } | |
| 43 | |
| 44 | |
| 45 struct WorldSceneWidget::SizeChangeFunctor | |
| 46 { | |
| 47 ViewportGeometry& view_; | |
| 48 | |
| 49 SizeChangeFunctor(ViewportGeometry& view) : | |
| 50 view_(view) | |
| 51 { | |
| 52 } | |
| 53 | |
| 54 void operator() (IWorldObserver& observer, | |
| 55 const WorldSceneWidget& source) | |
| 56 { | |
| 57 observer.NotifySizeChange(source, view_); | |
| 58 } | |
| 59 }; | |
| 60 | |
| 61 | |
| 281 | 62 // this is an adapter between a IWorldSceneMouseTracker |
| 63 // that is tracking a mouse in scene coordinates/mm and | |
| 64 // an IMouseTracker that is tracking a mouse | |
| 65 // in screen coordinates/pixels. | |
| 0 | 66 class WorldSceneWidget::SceneMouseTracker : public IMouseTracker |
| 67 { | |
| 68 private: | |
| 69 ViewportGeometry view_; | |
| 70 std::auto_ptr<IWorldSceneMouseTracker> tracker_; | |
| 281 | 71 |
| 0 | 72 public: |
| 73 SceneMouseTracker(const ViewportGeometry& view, | |
| 74 IWorldSceneMouseTracker* tracker) : | |
| 75 view_(view), | |
| 76 tracker_(tracker) | |
| 77 { | |
| 78 assert(tracker != NULL); | |
| 79 } | |
| 80 | |
| 81 virtual void Render(Orthanc::ImageAccessor& target) | |
| 82 { | |
| 83 CairoSurface surface(target); | |
| 281 | 84 CairoContext context(surface); |
| 0 | 85 view_.ApplyTransform(context); |
| 86 tracker_->Render(context, view_.GetZoom()); | |
| 87 } | |
| 88 | |
| 281 | 89 virtual void MouseUp() |
| 0 | 90 { |
| 91 tracker_->MouseUp(); | |
| 92 } | |
| 93 | |
| 281 | 94 virtual void MouseMove(int x, |
| 0 | 95 int y) |
| 96 { | |
| 97 double sceneX, sceneY; | |
| 98 MapMouseToScene(sceneX, sceneY, view_, x, y); | |
| 99 tracker_->MouseMove(sceneX, sceneY); | |
| 100 } | |
| 101 }; | |
| 102 | |
| 103 | |
| 281 | 104 WorldSceneWidget::PanMouseTracker::PanMouseTracker(WorldSceneWidget& that, |
| 105 int x, | |
| 106 int y) : | |
| 107 that_(that), | |
| 108 downX_(x), | |
| 109 downY_(y) | |
| 0 | 110 { |
| 281 | 111 that_.view_.GetPan(previousPanX_, previousPanY_); |
| 112 } | |
| 113 | |
| 114 void WorldSceneWidget::PanMouseTracker::MouseMove(int x, int y) | |
| 115 { | |
| 116 that_.view_.SetPan(previousPanX_ + x - downX_, | |
| 117 previousPanY_ + y - downY_); | |
| 118 | |
| 119 that_.observers_.Apply(that_, &IWorldObserver::NotifyViewChange, that_.view_); | |
| 120 } | |
| 0 | 121 |
| 281 | 122 WorldSceneWidget::ZoomMouseTracker::ZoomMouseTracker(WorldSceneWidget& that, |
| 123 int x, | |
| 124 int y) : | |
| 125 that_(that), | |
| 126 downX_(x), | |
| 127 downY_(y) | |
| 128 { | |
| 129 oldZoom_ = that_.view_.GetZoom(); | |
| 130 MapMouseToScene(centerX_, centerY_, that_.view_, downX_, downY_); | |
| 131 } | |
| 132 | |
| 133 void WorldSceneWidget::ZoomMouseTracker::MouseMove(int x, | |
| 134 int y) | |
| 135 { | |
| 136 static const double MIN_ZOOM = -4; | |
| 137 static const double MAX_ZOOM = 4; | |
| 138 | |
| 139 if (that_.view_.GetDisplayHeight() <= 3) | |
| 0 | 140 { |
| 281 | 141 return; // Cannot zoom on such a small image |
| 0 | 142 } |
| 143 | |
| 281 | 144 double dy = (static_cast<double>(y - downY_) / |
| 145 static_cast<double>(that_.view_.GetDisplayHeight() - 1)); // In the range [-1,1] | |
| 146 double z; | |
| 0 | 147 |
| 281 | 148 // Linear interpolation from [-1, 1] to [MIN_ZOOM, MAX_ZOOM] |
| 149 if (dy < -1.0) | |
| 0 | 150 { |
| 281 | 151 z = MIN_ZOOM; |
| 0 | 152 } |
| 281 | 153 else if (dy > 1.0) |
| 0 | 154 { |
| 281 | 155 z = MAX_ZOOM; |
| 0 | 156 } |
| 281 | 157 else |
| 0 | 158 { |
| 281 | 159 z = MIN_ZOOM + (MAX_ZOOM - MIN_ZOOM) * (dy + 1.0) / 2.0; |
| 0 | 160 } |
| 161 | |
| 281 | 162 z = pow(2.0, z); |
| 0 | 163 |
| 281 | 164 that_.view_.SetZoom(oldZoom_ * z); |
| 0 | 165 |
| 281 | 166 // Correct the pan so that the original click point is kept at |
| 167 // the same location on the display | |
| 168 double panX, panY; | |
| 169 that_.view_.GetPan(panX, panY); | |
| 0 | 170 |
| 281 | 171 int tx, ty; |
| 172 that_.view_.MapSceneToDisplay(tx, ty, centerX_, centerY_); | |
| 173 that_.view_.SetPan(panX + static_cast<double>(downX_ - tx), | |
| 174 panY + static_cast<double>(downY_ - ty)); | |
| 0 | 175 |
| 281 | 176 that_.observers_.Apply(that_, &IWorldObserver::NotifyViewChange, that_.view_); |
| 177 } | |
| 0 | 178 |
| 179 | |
| 180 bool WorldSceneWidget::RenderCairo(CairoContext& context) | |
| 181 { | |
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182 view_.ApplyTransform(context); |
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183 return RenderScene(context, view_); |
| 0 | 184 } |
| 185 | |
| 186 | |
| 187 void WorldSceneWidget::RenderMouseOverCairo(CairoContext& context, | |
| 188 int x, | |
| 189 int y) | |
| 190 { | |
| 191 ViewportGeometry view = GetView(); | |
| 192 view.ApplyTransform(context); | |
| 193 | |
| 194 double sceneX, sceneY; | |
| 195 MapMouseToScene(sceneX, sceneY, view, x, y); | |
| 196 RenderSceneMouseOver(context, view, sceneX, sceneY); | |
| 197 } | |
| 198 | |
| 199 | |
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200 void WorldSceneWidget::SetSceneExtent(ViewportGeometry& view) |
| 0 | 201 { |
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202 view.SetSceneExtent(GetSceneExtent()); |
| 0 | 203 } |
| 204 | |
| 205 | |
| 206 void WorldSceneWidget::SetSize(unsigned int width, | |
| 207 unsigned int height) | |
| 208 { | |
| 209 CairoWidget::SetSize(width, height); | |
| 210 | |
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211 view_.SetDisplaySize(width, height); |
| 0 | 212 |
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213 if (observers_.IsEmpty()) |
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214 { |
| 66 | 215 // Without a size observer, reset to the default view |
| 216 // view_.SetDefaultView(); | |
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217 } |
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218 else |
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219 { |
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220 // With a size observer, let it decide which view to use |
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221 SizeChangeFunctor functor(view_); |
| 91 | 222 observers_.Notify(*this, functor); |
| 0 | 223 } |
| 224 } | |
| 225 | |
| 226 | |
| 227 void WorldSceneWidget::SetInteractor(IWorldSceneInteractor& interactor) | |
| 228 { | |
| 229 interactor_ = &interactor; | |
| 230 } | |
| 231 | |
| 232 | |
| 233 void WorldSceneWidget::SetDefaultView() | |
| 234 { | |
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235 SetSceneExtent(view_); |
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236 view_.SetDefaultView(); |
| 0 | 237 |
| 278 | 238 NotifyContentChanged(); |
| 0 | 239 |
| 91 | 240 observers_.Apply(*this, &IWorldObserver::NotifyViewChange, view_); |
| 0 | 241 } |
| 242 | |
| 243 | |
| 244 void WorldSceneWidget::SetView(const ViewportGeometry& view) | |
| 245 { | |
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246 view_ = view; |
| 0 | 247 |
| 278 | 248 NotifyContentChanged(); |
| 0 | 249 |
| 91 | 250 observers_.Apply(*this, &IWorldObserver::NotifyViewChange, view_); |
| 0 | 251 } |
| 252 | |
| 253 | |
| 254 ViewportGeometry WorldSceneWidget::GetView() | |
| 255 { | |
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256 return view_; |
| 0 | 257 } |
| 258 | |
| 259 | |
| 260 IMouseTracker* WorldSceneWidget::CreateMouseTracker(MouseButton button, | |
| 261 int x, | |
| 262 int y, | |
| 263 KeyboardModifiers modifiers) | |
| 264 { | |
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265 double sceneX, sceneY; |
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266 MapMouseToScene(sceneX, sceneY, view_, x, y); |
| 0 | 267 |
| 281 | 268 // asks the Widget Interactor to provide a mouse tracker |
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269 std::auto_ptr<IWorldSceneMouseTracker> tracker |
| 281 | 270 (CreateMouseSceneTracker(view_, button, sceneX, sceneY, modifiers)); |
| 0 | 271 |
| 272 if (tracker.get() != NULL) | |
| 273 { | |
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274 return new SceneMouseTracker(view_, tracker.release()); |
| 0 | 275 } |
| 281 | 276 //TODO: allow Interactor to create Pan & Zoom |
| 0 | 277 switch (button) |
| 278 { | |
| 281 | 279 case MouseButton_Middle: |
| 280 return new PanMouseTracker(*this, x, y); | |
| 0 | 281 |
| 281 | 282 case MouseButton_Right: |
| 283 return new ZoomMouseTracker(*this, x, y); | |
| 0 | 284 |
| 281 | 285 default: |
| 286 return NULL; | |
| 0 | 287 } |
| 288 } | |
| 289 | |
| 290 | |
| 291 void WorldSceneWidget::RenderSceneMouseOver(CairoContext& context, | |
| 292 const ViewportGeometry& view, | |
| 293 double x, | |
| 294 double y) | |
| 295 { | |
| 296 if (interactor_) | |
| 297 { | |
| 59 | 298 interactor_->MouseOver(context, *this, view, x, y, GetStatusBar()); |
| 0 | 299 } |
| 300 } | |
| 301 | |
| 302 IWorldSceneMouseTracker* WorldSceneWidget::CreateMouseSceneTracker(const ViewportGeometry& view, | |
| 303 MouseButton button, | |
| 304 double x, | |
| 305 double y, | |
| 306 KeyboardModifiers modifiers) | |
| 307 { | |
| 308 if (interactor_) | |
| 309 { | |
| 281 | 310 return interactor_->CreateMouseTracker(*this, view, button, modifiers, x, y, GetStatusBar()); |
| 0 | 311 } |
| 312 else | |
| 313 { | |
| 314 return NULL; | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 | |
| 319 void WorldSceneWidget::MouseWheel(MouseWheelDirection direction, | |
| 320 int x, | |
| 321 int y, | |
| 281 | 322 KeyboardModifiers modifiers) |
| 0 | 323 { |
| 324 if (interactor_) | |
| 325 { | |
| 326 interactor_->MouseWheel(*this, direction, modifiers, GetStatusBar()); | |
| 327 } | |
| 328 } | |
| 329 | |
| 330 | |
| 331 void WorldSceneWidget::KeyPressed(char key, | |
| 332 KeyboardModifiers modifiers) | |
| 333 { | |
| 334 if (interactor_) | |
| 335 { | |
| 336 interactor_->KeyPressed(*this, key, modifiers, GetStatusBar()); | |
| 337 } | |
| 338 } | |
| 339 } |