dali/internal/event/events/touch-event-processor.cpp

   1 /*
   2  * Copyright (c) 2023 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // CLASS HEADER
  19 #include <dali/internal/event/events/touch-event-processor.h>
  20
  21 #if defined(DEBUG_ENABLED)
  22 #include <sstream>
  23 #endif
  24
  25 // INTERNAL INCLUDES
  26 #include <dali/integration-api/debug.h>
  27 #include <dali/integration-api/events/touch-event-integ.h>
  28 #include <dali/integration-api/trace.h>
  29 #include <dali/internal/event/actors/actor-impl.h>
  30 #include <dali/internal/event/actors/layer-impl.h>
  31 #include <dali/internal/event/common/scene-impl.h>
  32 #include <dali/internal/event/events/hit-test-algorithm-impl.h>
  33 #include <dali/internal/event/events/multi-point-event-util.h>
  34 #include <dali/internal/event/events/touch-event-impl.h>
  35 #include <dali/internal/event/render-tasks/render-task-impl.h>
  36 #include <dali/public-api/events/touch-event.h>
  37 #include <dali/public-api/math/vector2.h>
  38 #include <dali/public-api/signals/callback.h>
  39
  40 namespace Dali
  41 {
  42 namespace Internal
  43 {
  44 namespace
  45 {
  46 DALI_INIT_TRACE_FILTER(gTraceFilter, DALI_TRACE_PERFORMANCE_MARKER, false);
  47 #if defined(DEBUG_ENABLED)
  48 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_TOUCH_PROCESSOR");
  49 #endif // defined(DEBUG_ENABLED)
  50
  51 const char* TOUCH_POINT_STATE[6] =
  52   {
  53     "DOWN",
  54     "UP",
  55     "MOTION",
  56     "LEAVE",
  57     "STATIONARY",
  58     "INTERRUPTED",
  59 };
  60
  61 bool ShouldEmitInterceptTouchEvent(const Actor& actorImpl, const Dali::TouchEvent& event)
  62 {
  63   PointState::Type state = event.GetState(0);
  64   return actorImpl.GetInterceptTouchRequired() && (state != PointState::MOTION || actorImpl.IsDispatchTouchMotion());
  65 }
  66
  67 bool ShouldEmitTouchEvent(const Actor& actorImpl, const Dali::TouchEvent& event)
  68 {
  69   PointState::Type state = event.GetState(0);
  70   return actorImpl.GetTouchRequired() && (state != PointState::MOTION || actorImpl.IsDispatchTouchMotion());
  71 }
  72
  73 // child -> parent
  74 Dali::Actor EmitInterceptTouchSignals(Dali::Actor actor, const Dali::TouchEvent& touchEvent)
  75 {
  76   Dali::Actor interceptedActor;
  77
  78   if(actor)
  79   {
  80     Dali::Actor parent = actor.GetParent();
  81     if(parent)
  82     {
  83       // Recursively deliver events to the actor and its parents for intercept touch event.
  84       interceptedActor = EmitInterceptTouchSignals(parent, touchEvent);
  85     }
  86
  87     if(!interceptedActor)
  88     {
  89       bool   intercepted = false;
  90       Actor& actorImpl(GetImplementation(actor));
  91       if(ShouldEmitInterceptTouchEvent(actorImpl, touchEvent))
  92       {
  93         DALI_TRACE_SCOPE(gTraceFilter, "DALI_EMIT_INTERCEPT_TOUCH_EVENT_SIGNAL");
  94         intercepted = actorImpl.EmitInterceptTouchEventSignal(touchEvent);
  95         if(intercepted)
  96         {
  97           interceptedActor = Dali::Actor(&actorImpl);
  98         }
  99       }
 100     }
 101   }
 102   return interceptedActor;
 103 }
 104
 105 // geometry
 106 // child -> below
 107 Dali::Actor EmitGeoInterceptTouchSignals(std::list<Dali::Internal::Actor*>& actorLists, std::list<Dali::Internal::Actor*>& interceptActorList, const Dali::TouchEvent& touchEvent)
 108 {
 109   interceptActorList.clear();
 110   Dali::Actor interceptedActor;
 111   for(auto&& actor : actorLists)
 112   {
 113     interceptActorList.push_back(actor);
 114     if(ShouldEmitInterceptTouchEvent(*actor, touchEvent))
 115     {
 116       DALI_TRACE_SCOPE(gTraceFilter, "DALI_EMIT_INTERCEPT_TOUCH_EVENT_SIGNAL");
 117       if(actor->EmitInterceptTouchEventSignal(touchEvent))
 118       {
 119         interceptedActor = Dali::Actor(actor);
 120         break;
 121       }
 122     }
 123   }
 124   return interceptedActor;
 125 }
 126
 127 /**
 128  *  Recursively deliver events to the actor and its parents, until the event is consumed or the stage is reached.
 129  */
 130 Dali::Actor EmitTouchSignals(Dali::Actor actor, const Dali::TouchEvent& touchEvent)
 131 {
 132   Dali::Actor consumedActor;
 133
 134   if(actor)
 135   {
 136     Dali::Actor oldParent(actor.GetParent());
 137
 138     Actor& actorImpl(GetImplementation(actor));
 139
 140     bool consumed(false);
 141
 142     // Only emit the signal if the actor's touch signal has connections (or derived actor implementation requires touch).
 143     if(ShouldEmitTouchEvent(actorImpl, touchEvent))
 144     {
 145       DALI_TRACE_SCOPE(gTraceFilter, "DALI_EMIT_TOUCH_EVENT_SIGNAL");
 146       consumed = actorImpl.EmitTouchEventSignal(touchEvent);
 147     }
 148
 149     if(consumed)
 150     {
 151       // One of this actor's listeners has consumed the event so set this actor as the consumed actor.
 152       consumedActor = Dali::Actor(&actorImpl);
 153     }
 154     else
 155     {
 156       // The actor may have been removed/reparented during the signal callbacks.
 157       Dali::Actor parent = actor.GetParent();
 158
 159       if(parent &&
 160          (parent == oldParent))
 161       {
 162         // One of the actor's parents may consumed the event and they should be set as the consumed actor.
 163         consumedActor = EmitTouchSignals(parent, touchEvent);
 164       }
 165     }
 166   }
 167
 168   return consumedActor;
 169 }
 170
 171 /**
 172  *  Recursively deliver events to the actor and its below actor, until the event is consumed or the stage is reached.
 173  */
 174 Dali::Actor EmitGeoTouchSignals(std::list<Dali::Internal::Actor*>& actorLists, const Dali::TouchEvent& touchEvent)
 175 {
 176   Dali::Actor consumedActor;
 177
 178   std::list<Dali::Internal::Actor*>::reverse_iterator rIter = actorLists.rbegin();
 179   for (; rIter != actorLists.rend(); rIter++)
 180   {
 181     Actor* actorImpl(*rIter);
 182     // Only emit the signal if the actor's touch signal has connections (or derived actor implementation requires touch).
 183     if(ShouldEmitTouchEvent(*actorImpl, touchEvent))
 184     {
 185       DALI_TRACE_SCOPE(gTraceFilter, "DALI_EMIT_TOUCH_EVENT_SIGNAL");
 186       if(actorImpl->EmitTouchEventSignal(touchEvent))
 187       {
 188         // One of this actor's listeners has consumed the event so set this actor as the consumed actor.
 189         consumedActor = Dali::Actor(actorImpl);
 190         break;
 191       }
 192     }
 193   }
 194   return consumedActor;
 195 }
 196
 197 Dali::Actor AllocAndEmitTouchSignals(unsigned long time, Dali::Actor actor, const Integration::Point& point, RenderTaskPtr renderTask)
 198 {
 199   TouchEventPtr    touchEvent(new TouchEvent(time));
 200   Dali::TouchEvent touchEventHandle(touchEvent.Get());
 201
 202   touchEvent->AddPoint(point);
 203   touchEvent->SetRenderTask(Dali::RenderTask(renderTask.Get()));
 204
 205   return EmitTouchSignals(actor, touchEventHandle);
 206 }
 207
 208 Dali::Actor GeoAllocAndEmitTouchSignals(std::list<Dali::Internal::Actor*>& actorLists, unsigned long time, const Integration::Point& point, RenderTaskPtr renderTask)
 209 {
 210   TouchEventPtr    touchEvent(new TouchEvent(time));
 211   Dali::TouchEvent touchEventHandle(touchEvent.Get());
 212
 213   touchEvent->AddPoint(point);
 214   touchEvent->SetRenderTask(Dali::RenderTask(renderTask.Get()));
 215
 216   return EmitGeoTouchSignals(actorLists, touchEventHandle);
 217 }
 218
 219 /**
 220  * Changes the state of the primary point to leave and emits the touch signals
 221  */
 222 Dali::Actor EmitTouchSignals(Actor* actor, RenderTask& renderTask, const TouchEventPtr& originalTouchEvent, PointState::Type state, bool isGeometry)
 223 {
 224   Dali::Actor consumingActor;
 225
 226   if(actor)
 227   {
 228     TouchEventPtr touchEventImpl = TouchEvent::Clone(*originalTouchEvent.Get());
 229     touchEventImpl->SetRenderTask(Dali::RenderTask(&renderTask));
 230
 231     Integration::Point& primaryPoint = touchEventImpl->GetPoint(0);
 232
 233     const Vector2& screenPosition = primaryPoint.GetScreenPosition();
 234     Vector2        localPosition;
 235     actor->ScreenToLocal(renderTask, localPosition.x, localPosition.y, screenPosition.x, screenPosition.y);
 236
 237     primaryPoint.SetLocalPosition(localPosition);
 238     primaryPoint.SetHitActor(Dali::Actor(actor));
 239     primaryPoint.SetState(state);
 240
 241     if(isGeometry)
 242     {
 243       std::list<Dali::Internal::Actor*> actorLists;
 244       actorLists.push_back(actor);
 245       consumingActor = EmitGeoTouchSignals(actorLists, Dali::TouchEvent(touchEventImpl.Get()));
 246     }
 247     else
 248     {
 249       consumingActor = EmitTouchSignals(Dali::Actor(actor), Dali::TouchEvent(touchEventImpl.Get()));
 250     }
 251   }
 252
 253   return consumingActor;
 254 }
 255
 256 /**
 257  * @brief Parses the primary touch point by performing a hit-test if necessary
 258  *
 259  * @param[out] hitTestResults The hit test results are put into this variable
 260  * @param[in/out] capturingTouchActorObserver The observer for the capturing touch actor member
 261  * @param[in] lastRenderTask The last render task member
 262  * @param[in] currentPoint The current point information
 263  * @param[in] scene The scene that this touch is related to
 264  * @param[in] actorLists The list of actors that can be touched, from leaf actor to root.
 265  */
 266 void ParsePrimaryTouchPoint(
 267   HitTestAlgorithm::Results& hitTestResults,
 268   ActorObserver&             capturingTouchActorObserver,
 269   ActorObserver&             ownTouchActorObserver,
 270   const RenderTaskPtr&       lastRenderTask,
 271   const Integration::Point&  currentPoint,
 272   const Internal::Scene&     scene,
 273   std::list<Dali::Internal::Actor*>& actorLists)
 274 {
 275   Actor* capturingTouchActor = capturingTouchActorObserver.GetActor();
 276
 277   // We only set the capturing touch actor when the first touch-started actor captures all touch so if it's set, just use it
 278   if(capturingTouchActor && lastRenderTask)
 279   {
 280     hitTestResults.actor          = Dali::Actor(capturingTouchActor);
 281     hitTestResults.renderTask     = lastRenderTask;
 282     const Vector2& screenPosition = currentPoint.GetScreenPosition();
 283     capturingTouchActor->ScreenToLocal(*lastRenderTask, hitTestResults.actorCoordinates.x, hitTestResults.actorCoordinates.y, screenPosition.x, screenPosition.y);
 284   }
 285   else
 286   {
 287     Actor* ownTouchActor = ownTouchActorObserver.GetActor();
 288     HitTestAlgorithm::HitTest(scene.GetSize(), scene.GetRenderTaskList(), scene.GetLayerList(), currentPoint.GetScreenPosition(), hitTestResults, ownTouchActor, scene.IsGeometryHittestEnabled());
 289
 290     if(currentPoint.GetState() == PointState::STARTED && hitTestResults.actor)
 291     {
 292       bool isGeometry = scene.IsGeometryHittestEnabled();
 293       // If we've just started touch, then check whether the actor has requested to capture all touch events
 294       Actor* hitActor = &GetImplementation(hitTestResults.actor);
 295       if(hitActor->CapturesAllTouchAfterStart() || isGeometry)
 296       {
 297         capturingTouchActorObserver.SetActor(hitActor);
 298       }
 299       if(hitActor->IsAllowedOnlyOwnTouch() || isGeometry)
 300       {
 301         ownTouchActorObserver.SetActor(hitActor);
 302       }
 303       if(isGeometry)
 304       {
 305         actorLists = hitTestResults.actorLists;
 306       }
 307     }
 308   }
 309 }
 310
 311 } // unnamed namespace
 312
 313 TouchEventProcessor::TouchEventProcessor(Scene& scene)
 314 : mScene(scene),
 315   mLastPrimaryHitActor(MakeCallback(this, &TouchEventProcessor::OnObservedActorDisconnected)),
 316   mLastConsumedActor(),
 317   mCapturingTouchActor(),
 318   mOwnTouchActor(),
 319   mTouchDownConsumedActor(),
 320   mInterceptedTouchActor(),
 321   mLastRenderTask(),
 322   mLastPrimaryPointState(PointState::FINISHED)
 323 {
 324   DALI_LOG_TRACE_METHOD(gLogFilter);
 325 }
 326
 327 TouchEventProcessor::~TouchEventProcessor()
 328 {
 329   DALI_LOG_TRACE_METHOD(gLogFilter);
 330 }
 331
 332 void TouchEventProcessor::Clear()
 333 {
 334   mLastPrimaryHitActor.SetActor(nullptr);
 335   mLastConsumedActor.SetActor(nullptr);
 336   mCapturingTouchActor.SetActor(nullptr);
 337   mOwnTouchActor.SetActor(nullptr);
 338   mInterceptedTouchActor.SetActor(nullptr);
 339   mLastRenderTask.Reset();
 340   mLastPrimaryPointState = PointState::FINISHED;
 341 }
 342
 343 bool TouchEventProcessor::ProcessTouchEvent(const Integration::TouchEvent& event)
 344 {
 345   DALI_LOG_TRACE_METHOD(gLogFilter);
 346   DALI_ASSERT_ALWAYS(!event.points.empty() && "Empty TouchEvent sent from Integration\n");
 347
 348   PRINT_HIERARCHY(gLogFilter);
 349
 350   DALI_TRACE_SCOPE(gTraceFilter, "DALI_PROCESS_TOUCH_EVENT");
 351
 352   bool isGeometry = mScene.IsGeometryHittestEnabled();
 353
 354   // 1) Check if it is an interrupted event - we should inform our last primary hit actor about this
 355   //    and emit the stage signal as well.
 356
 357   if(event.points[0].GetState() == PointState::INTERRUPTED)
 358   {
 359     Dali::Actor        consumingActor;
 360     Integration::Point currentPoint(event.points[0]);
 361
 362     if(isGeometry)
 363     {
 364       // Since the geometry way only receives touch events from the consumed actor,
 365       // it first searches for whether there is a consumed actor and then sends the event
 366       Actor* touchConsumedActor(mLastConsumedActor.GetActor());
 367       Actor* touchDownConsumedActor(mTouchDownConsumedActor.GetActor());
 368       Actor* lastPrimaryHitActor(mLastPrimaryHitActor.GetActor());
 369       if(touchConsumedActor)
 370       {
 371         Dali::Actor touchConsumedActorHandle(touchConsumedActor);
 372         currentPoint.SetHitActor(touchConsumedActorHandle);
 373         std::list<Dali::Internal::Actor*> actorLists;
 374         actorLists.push_back(touchConsumedActor);
 375         GeoAllocAndEmitTouchSignals(actorLists, event.time, currentPoint, mLastRenderTask);
 376       }
 377       else if(touchDownConsumedActor)
 378       {
 379         Dali::Actor touchDownConsumedActorHandle(touchDownConsumedActor);
 380         currentPoint.SetHitActor(touchDownConsumedActorHandle);
 381         std::list<Dali::Internal::Actor*> actorLists;
 382         actorLists.push_back(touchDownConsumedActor);
 383         GeoAllocAndEmitTouchSignals(actorLists, event.time, currentPoint, mLastRenderTask);
 384       }
 385       else if(lastPrimaryHitActor)
 386       {
 387         Dali::Actor lastPrimaryHitActorHandle(lastPrimaryHitActor);
 388         currentPoint.SetHitActor(lastPrimaryHitActorHandle);
 389
 390         GeoAllocAndEmitTouchSignals(mCandidateActorLists, event.time, currentPoint, mLastRenderTask);
 391       }
 392     }
 393     else
 394     {
 395       Actor* lastPrimaryHitActor(mLastPrimaryHitActor.GetActor());
 396       if(lastPrimaryHitActor)
 397       {
 398         Dali::Actor lastPrimaryHitActorHandle(lastPrimaryHitActor);
 399         currentPoint.SetHitActor(lastPrimaryHitActorHandle);
 400
 401         consumingActor = AllocAndEmitTouchSignals(event.time, lastPrimaryHitActorHandle, currentPoint, mLastRenderTask);
 402       }
 403
 404       // If the last consumed actor was different to the primary hit actor then inform it as well (if it has not already been informed).
 405       Actor* lastConsumedActor(mLastConsumedActor.GetActor());
 406       if(lastConsumedActor &&
 407         lastConsumedActor != lastPrimaryHitActor &&
 408         lastConsumedActor != consumingActor)
 409       {
 410         Dali::Actor lastConsumedActorHandle(lastConsumedActor);
 411         currentPoint.SetHitActor(lastConsumedActorHandle);
 412         AllocAndEmitTouchSignals(event.time, lastConsumedActorHandle, currentPoint, mLastRenderTask);
 413       }
 414
 415       // Tell the touch-down consuming actor as well, if required
 416       Actor* touchDownConsumedActor(mTouchDownConsumedActor.GetActor());
 417       if(touchDownConsumedActor &&
 418         touchDownConsumedActor != lastPrimaryHitActor &&
 419         touchDownConsumedActor != lastConsumedActor &&
 420         touchDownConsumedActor != consumingActor)
 421       {
 422         Dali::Actor touchDownConsumedActorHandle(touchDownConsumedActor);
 423
 424         currentPoint.SetHitActor(touchDownConsumedActorHandle);
 425         AllocAndEmitTouchSignals(event.time, touchDownConsumedActorHandle, currentPoint, mLastRenderTask);
 426       }
 427     }
 428
 429     Clear();
 430     mTouchDownConsumedActor.SetActor(nullptr);
 431
 432     currentPoint.SetHitActor(Dali::Actor());
 433
 434     TouchEventPtr    touchEventImpl(new TouchEvent(event.time));
 435     Dali::TouchEvent touchEventHandle(touchEventImpl.Get());
 436
 437     touchEventImpl->AddPoint(currentPoint);
 438
 439     mScene.EmitTouchedSignal(touchEventHandle);
 440     return false; // No need for hit testing & already an interrupted event so just return false
 441   }
 442
 443   // 2) Hit Testing.
 444   TouchEventPtr    touchEventImpl(new TouchEvent(event.time));
 445   Dali::TouchEvent touchEventHandle(touchEventImpl.Get());
 446
 447   DALI_LOG_INFO(gLogFilter, Debug::Concise, "\n");
 448   DALI_LOG_INFO(gLogFilter, Debug::General, "Point(s): %d\n", event.GetPointCount());
 449
 450   RenderTaskPtr currentRenderTask;
 451   bool          firstPointParsed = false;
 452
 453   for(auto&& currentPoint : event.points)
 454   {
 455     HitTestAlgorithm::Results hitTestResults;
 456     hitTestResults.point     = currentPoint;
 457     hitTestResults.eventTime = event.time;
 458     if(!firstPointParsed)
 459     {
 460       firstPointParsed = true;
 461       ParsePrimaryTouchPoint(hitTestResults, mCapturingTouchActor, mOwnTouchActor, mLastRenderTask, currentPoint, mScene, mCandidateActorLists);
 462
 463       // Only set the currentRenderTask for the primary hit actor.
 464       currentRenderTask = hitTestResults.renderTask;
 465       touchEventImpl->SetRenderTask(Dali::RenderTask(currentRenderTask.Get()));
 466     }
 467     else
 468     {
 469       HitTestAlgorithm::HitTest(mScene.GetSize(), mScene.GetRenderTaskList(), mScene.GetLayerList(), currentPoint.GetScreenPosition(), hitTestResults, nullptr, isGeometry);
 470     }
 471
 472     Integration::Point newPoint(currentPoint);
 473     newPoint.SetHitActor(hitTestResults.actor);
 474     newPoint.SetLocalPosition(hitTestResults.actorCoordinates);
 475
 476     touchEventImpl->AddPoint(newPoint);
 477
 478     DALI_LOG_INFO(gLogFilter, Debug::General, "  State(%s), Screen(%.0f, %.0f), HitActor(%p, %s), Local(%.2f, %.2f)\n", TOUCH_POINT_STATE[currentPoint.GetState()], currentPoint.GetScreenPosition().x, currentPoint.GetScreenPosition().y, (hitTestResults.actor ? reinterpret_cast<void*>(&hitTestResults.actor.GetBaseObject()) : NULL), (hitTestResults.actor ? hitTestResults.actor.GetProperty<std::string>(Dali::Actor::Property::NAME).c_str() : ""), hitTestResults.actorCoordinates.x, hitTestResults.actorCoordinates.y);
 479   }
 480
 481   // 3) Recursively deliver events to the actor and its parents, until the event is consumed or the stage is reached.
 482
 483   bool consumed = false;
 484
 485   // Emit the touch signal
 486   Dali::Actor consumedActor;
 487
 488   Integration::Point& primaryPoint      = touchEventImpl->GetPoint(0);
 489   Dali::Actor         primaryHitActor   = primaryPoint.GetHitActor();
 490   PointState::Type    primaryPointState = primaryPoint.GetState();
 491
 492   if(currentRenderTask)
 493   {
 494     if(isGeometry)
 495     {
 496       Actor* interceptedTouchActor(mInterceptedTouchActor.GetActor());
 497       if(interceptedTouchActor)
 498       {
 499         Actor* touchConsumedActor(mLastConsumedActor.GetActor());
 500         if(touchConsumedActor) // If there is a consultative actor, send events only to the consultative actor.
 501         {
 502           RenderTask& currentRenderTaskImpl = *currentRenderTask.Get();
 503           consumedActor = EmitTouchSignals(touchConsumedActor, currentRenderTaskImpl, touchEventImpl, primaryPointState, isGeometry);
 504         }
 505         else // If there is an intercepted actor, send a touch event starting from the intercepted actor.
 506         {
 507           Dali::Actor interceptedTouchActorHandle(interceptedTouchActor);
 508           std::list<Dali::Internal::Actor*> interceptActorLists = mInterceptedActorLists;
 509           consumedActor = EmitGeoTouchSignals(interceptActorLists, touchEventHandle);
 510         }
 511       }
 512       else
 513       {
 514         Dali::Actor interceptedActor;
 515         // Let's find out if there is an intercept actor.
 516         interceptedActor = EmitGeoInterceptTouchSignals(mCandidateActorLists, mInterceptedActorLists, touchEventHandle);
 517         if(interceptedActor)
 518         {
 519           mInterceptedTouchActor.SetActor(&GetImplementation(interceptedActor));
 520
 521           // If there is an interception, send an interrupted event to the last consumed actor or to the actor that hit previously.
 522           if(mLastConsumedActor.GetActor() &&
 523               mLastConsumedActor.GetActor() != interceptedActor &&
 524               mLastRenderTask &&
 525               mLastPrimaryPointState != PointState::FINISHED)
 526           {
 527             EmitTouchSignals(mLastConsumedActor.GetActor(), *mLastRenderTask.Get(), touchEventImpl, PointState::INTERRUPTED, isGeometry);
 528             mTouchDownConsumedActor.SetActor(nullptr);
 529             mLastConsumedActor.SetActor(nullptr);
 530           }
 531           else if(mLastPrimaryHitActor.GetActor() &&
 532                   mLastPrimaryHitActor.GetActor() != interceptedActor &&
 533                   mLastRenderTask &&
 534                   mLastPrimaryPointState != PointState::FINISHED)
 535           {
 536             std::list<Dali::Internal::Actor*> internalActorLists = mCandidateActorLists;
 537             while(!internalActorLists.empty())
 538             {
 539               Actor* actorImpl = internalActorLists.back();
 540               // Only emit the signal if the actor's touch signal has connections (or derived actor implementation requires touch).
 541               if(actorImpl->GetTouchRequired())
 542               {
 543                 EmitTouchSignals(actorImpl, *mLastRenderTask.Get(), touchEventImpl, PointState::INTERRUPTED, isGeometry);
 544               }
 545               internalActorLists.pop_back();
 546             }
 547           }
 548         }
 549
 550         Actor* touchConsumedActor(mLastConsumedActor.GetActor());
 551         if(touchConsumedActor) // If there is a consultative actor, send events only to the consultative actor.
 552         {
 553           RenderTask& currentRenderTaskImpl = *currentRenderTask.Get();
 554           consumedActor = EmitTouchSignals(touchConsumedActor, currentRenderTaskImpl, touchEventImpl, primaryPointState, isGeometry);
 555         }
 556         else
 557         {
 558           // Let's propagate touch events from the intercepted actor or start propagating touch events from the leaf actor.
 559           consumedActor = EmitGeoTouchSignals(interceptedActor ? mInterceptedActorLists : mCandidateActorLists, touchEventHandle);
 560         }
 561       }
 562     }
 563     else
 564     {
 565       Actor* interceptedTouchActor(mInterceptedTouchActor.GetActor());
 566       if(interceptedTouchActor)
 567       {
 568         Dali::Actor interceptedTouchActorHandle(interceptedTouchActor);
 569         consumedActor = EmitTouchSignals(interceptedTouchActorHandle, touchEventHandle);
 570       }
 571       else
 572       {
 573         // Emit the intercept touch signal
 574         Dali::Actor interceptedActor = EmitInterceptTouchSignals(primaryHitActor, touchEventHandle);
 575         if(interceptedActor)
 576         {
 577           mInterceptedTouchActor.SetActor(&GetImplementation(interceptedActor));
 578           // If the child is being touched, INTERRUPTED is sent.
 579           if(mLastPrimaryHitActor.GetActor() &&
 580             mLastPrimaryHitActor.GetActor() != interceptedActor &&
 581             mLastRenderTask &&
 582             mLastPrimaryPointState != PointState::FINISHED)
 583           {
 584             EmitTouchSignals(mLastPrimaryHitActor.GetActor(), *mLastRenderTask.Get(), touchEventImpl, PointState::INTERRUPTED, isGeometry);
 585             mTouchDownConsumedActor.SetActor(nullptr);
 586           }
 587           consumedActor = EmitTouchSignals(interceptedActor, touchEventHandle);
 588         }
 589         else
 590         {
 591           consumedActor = EmitTouchSignals(primaryHitActor, touchEventHandle);
 592         }
 593       }
 594     }
 595
 596     consumed = consumedActor ? true : false;
 597
 598     if(primaryPointState == PointState::MOTION)
 599     {
 600       DALI_LOG_INFO(gLogFilter, Debug::Concise, "PrimaryHitActor: (%p) id(%d), name(%s), state(%s), screenPosition(%f, %f), isGeo : %d \n", primaryHitActor ? reinterpret_cast<void*>(&primaryHitActor.GetBaseObject()) : NULL, primaryHitActor ? primaryHitActor.GetProperty<int32_t>(Dali::Actor::Property::ID) : -1, primaryHitActor ? primaryHitActor.GetProperty<std::string>(Dali::Actor::Property::NAME).c_str() : "", TOUCH_POINT_STATE[primaryPointState], primaryPoint.GetScreenPosition().x, primaryPoint.GetScreenPosition().y, isGeometry);
 601       DALI_LOG_INFO(gLogFilter, Debug::Concise, "ConsumedActor:   (%p) id(%d), name(%s), state(%s), isGeo : %d \n", consumedActor ? reinterpret_cast<void*>(&consumedActor.GetBaseObject()) : NULL, consumedActor ? consumedActor.GetProperty<int32_t>(Dali::Actor::Property::ID) : -1, consumedActor ? consumedActor.GetProperty<std::string>(Dali::Actor::Property::NAME).c_str() : "", TOUCH_POINT_STATE[primaryPointState], isGeometry);
 602     }
 603     else
 604     {
 605       DALI_LOG_RELEASE_INFO("PrimaryHitActor:(%p), id(%d), name(%s), state(%s), screenPosition(%f, %f), isGeo : %d \n", primaryHitActor ? reinterpret_cast<void*>(&primaryHitActor.GetBaseObject()) : NULL, primaryHitActor ? primaryHitActor.GetProperty<int32_t>(Dali::Actor::Property::ID) : -1, primaryHitActor ? primaryHitActor.GetProperty<std::string>(Dali::Actor::Property::NAME).c_str() : "", TOUCH_POINT_STATE[primaryPointState], primaryPoint.GetScreenPosition().x, primaryPoint.GetScreenPosition().y, isGeometry);
 606       DALI_LOG_RELEASE_INFO("ConsumedActor:  (%p), id(%d), name(%s), state(%s), isGeo : %d \n", consumedActor ? reinterpret_cast<void*>(&consumedActor.GetBaseObject()) : NULL, consumedActor ? consumedActor.GetProperty<int32_t>(Dali::Actor::Property::ID) : -1, consumedActor ? consumedActor.GetProperty<std::string>(Dali::Actor::Property::NAME).c_str() : "", TOUCH_POINT_STATE[primaryPointState], isGeometry);
 607     }
 608   }
 609
 610   if((primaryPointState == PointState::DOWN) &&
 611      (touchEventImpl->GetPointCount() == 1) &&
 612      (consumedActor && consumedActor.GetProperty<bool>(Dali::Actor::Property::CONNECTED_TO_SCENE)))
 613   {
 614     mTouchDownConsumedActor.SetActor(&GetImplementation(consumedActor));
 615   }
 616
 617   // 4) Check if the last primary hit actor requires a leave event and if it was different to the current primary
 618   //    hit actor.  Also process the last consumed actor in the same manner.
 619   Actor* lastPrimaryHitActor(nullptr);
 620   if(mInterceptedTouchActor.GetActor())
 621   {
 622     lastPrimaryHitActor = mInterceptedTouchActor.GetActor();
 623   }
 624   else
 625   {
 626     lastPrimaryHitActor = mLastPrimaryHitActor.GetActor();
 627   }
 628   Actor* lastConsumedActor(mLastConsumedActor.GetActor());
 629   if((primaryPointState == PointState::MOTION) || (primaryPointState == PointState::UP) || (primaryPointState == PointState::STATIONARY))
 630   {
 631     if(mLastRenderTask)
 632     {
 633       Dali::Actor leaveEventConsumer;
 634       RenderTask& lastRenderTaskImpl = *mLastRenderTask.Get();
 635
 636       if(isGeometry)
 637       {
 638         if(lastPrimaryHitActor)
 639         {
 640           if(!lastPrimaryHitActor->IsHittable() || !IsActuallySensitive(lastPrimaryHitActor))
 641           {
 642             // At this point mLastPrimaryHitActor was touchable and sensitive in the previous touch event process but is not in the current one.
 643             // An interrupted event is send to allow some actors to go back to their original state (i.e. Button controls)
 644             DALI_LOG_RELEASE_INFO("InterruptedActor(Hit):     (%p) %s\n", reinterpret_cast<void*>(lastPrimaryHitActor), lastPrimaryHitActor->GetName().data());
 645             leaveEventConsumer = EmitTouchSignals(lastPrimaryHitActor, lastRenderTaskImpl, touchEventImpl, PointState::INTERRUPTED, isGeometry);
 646           }
 647         }
 648
 649         consumed |= leaveEventConsumer ? true : false;
 650
 651         // Check if the motion event has been consumed by another actor's listener.  In this case, the previously
 652         // consumed actor's listeners may need to be informed (through a leave event).
 653         // Further checks here to ensure we do not signal the same actor twice for the same event.
 654         if(lastConsumedActor &&
 655            lastConsumedActor != lastPrimaryHitActor &&
 656            lastConsumedActor != leaveEventConsumer)
 657         {
 658           if(!lastConsumedActor->IsHittable() || !IsActuallySensitive(lastConsumedActor))
 659           {
 660             // At this point mLastConsumedActor was touchable and sensitive in the previous touch event process but is not in the current one.
 661             // An interrupted event is send to allow some actors to go back to their original state (i.e. Button controls)
 662             DALI_LOG_RELEASE_INFO("InterruptedActor(Consume):     (%p) %s\n", reinterpret_cast<void*>(lastConsumedActor), lastConsumedActor->GetName().data());
 663             EmitTouchSignals(mLastConsumedActor.GetActor(), lastRenderTaskImpl, touchEventImpl, PointState::INTERRUPTED, isGeometry);
 664           }
 665         }
 666       }
 667       else
 668       {
 669         if(lastPrimaryHitActor &&
 670            lastPrimaryHitActor != primaryHitActor &&
 671            lastPrimaryHitActor != consumedActor)
 672         {
 673           if(lastPrimaryHitActor->IsHittable() && IsActuallySensitive(lastPrimaryHitActor))
 674           {
 675             if(lastPrimaryHitActor->GetLeaveRequired())
 676             {
 677               DALI_LOG_RELEASE_INFO("LeaveActor(Hit): (%p) %d %s\n", reinterpret_cast<void*>(lastPrimaryHitActor), lastPrimaryHitActor->GetId(), lastPrimaryHitActor->GetName().data());
 678               leaveEventConsumer = EmitTouchSignals(lastPrimaryHitActor, lastRenderTaskImpl, touchEventImpl, PointState::LEAVE, isGeometry);
 679             }
 680           }
 681           else
 682           {
 683             // At this point mLastPrimaryHitActor was touchable and sensitive in the previous touch event process but is not in the current one.
 684             // An interrupted event is send to allow some actors to go back to their original state (i.e. Button controls)
 685             DALI_LOG_RELEASE_INFO("InterruptedActor(Hit): (%p) %d %s\n", reinterpret_cast<void*>(lastPrimaryHitActor), lastPrimaryHitActor->GetId(), lastPrimaryHitActor->GetName().data());
 686             leaveEventConsumer = EmitTouchSignals(lastPrimaryHitActor, lastRenderTaskImpl, touchEventImpl, PointState::INTERRUPTED, isGeometry);
 687           }
 688         }
 689
 690         consumed |= leaveEventConsumer ? true : false;
 691
 692         // Check if the motion event has been consumed by another actor's listener.  In this case, the previously
 693         // consumed actor's listeners may need to be informed (through a leave event).
 694         // Further checks here to ensure we do not signal the same actor twice for the same event.
 695         if(lastConsumedActor &&
 696           lastConsumedActor != consumedActor &&
 697           lastConsumedActor != lastPrimaryHitActor &&
 698           lastConsumedActor != primaryHitActor &&
 699           lastConsumedActor != leaveEventConsumer)
 700         {
 701           if(lastConsumedActor->IsHittable() && IsActuallySensitive(lastConsumedActor))
 702           {
 703             if(lastConsumedActor->GetLeaveRequired())
 704             {
 705               DALI_LOG_RELEASE_INFO("LeaveActor(Consume): (%p) %d %s\n", reinterpret_cast<void*>(lastConsumedActor), lastConsumedActor->GetId(), lastConsumedActor->GetName().data());
 706               EmitTouchSignals(lastConsumedActor, lastRenderTaskImpl, touchEventImpl, PointState::LEAVE, isGeometry);
 707             }
 708           }
 709           else
 710           {
 711             // At this point mLastConsumedActor was touchable and sensitive in the previous touch event process but is not in the current one.
 712             // An interrupted event is send to allow some actors to go back to their original state (i.e. Button controls)
 713             DALI_LOG_RELEASE_INFO("InterruptedActor(Consume): (%p) %d %s\n", reinterpret_cast<void*>(lastConsumedActor), lastConsumedActor->GetId(), lastConsumedActor->GetName().data());
 714             EmitTouchSignals(mLastConsumedActor.GetActor(), lastRenderTaskImpl, touchEventImpl, PointState::INTERRUPTED, isGeometry);
 715           }
 716         }
 717       }
 718     }
 719   }
 720
 721   // 5) If our primary point is an Up event, then the primary point (in multi-touch) will change next
 722   //    time so set our last primary actor to NULL.  Do the same to the last consumed actor as well.
 723   if(primaryPointState == PointState::UP)
 724   {
 725     Clear();
 726   }
 727   else
 728   {
 729     // The primaryHitActor may have been removed from the scene so ensure it is still on the scene before setting members.
 730     if(primaryHitActor && GetImplementation(primaryHitActor).OnScene())
 731     {
 732       mLastPrimaryHitActor.SetActor(&GetImplementation(primaryHitActor));
 733
 734       // Only observe the consumed actor if we have a primaryHitActor (check if it is still on the scene).
 735       if(consumedActor && GetImplementation(consumedActor).OnScene())
 736       {
 737         mLastConsumedActor.SetActor(&GetImplementation(consumedActor));
 738       }
 739       else
 740       {
 741         if(isGeometry)
 742         {
 743           if(lastConsumedActor && !lastConsumedActor->OnScene())
 744           {
 745             mLastConsumedActor.SetActor(nullptr);
 746           }
 747         }
 748         else
 749         {
 750           mLastConsumedActor.SetActor(nullptr);
 751         }
 752       }
 753
 754       mLastRenderTask        = currentRenderTask;
 755       mLastPrimaryPointState = primaryPointState;
 756     }
 757     else
 758     {
 759       Clear();
 760     }
 761   }
 762
 763   // 6) Emit an interrupted event to the touch-down actor if it hasn't consumed the up and
 764   //    emit the stage touched event if required.
 765
 766   if(touchEventImpl->GetPointCount() == 1) // Only want the first touch and the last release
 767   {
 768     switch(primaryPointState)
 769     {
 770       case PointState::UP:
 771       {
 772         Actor* touchDownConsumedActor(mTouchDownConsumedActor.GetActor());
 773         if(touchDownConsumedActor &&
 774            touchDownConsumedActor != consumedActor &&
 775            touchDownConsumedActor != lastPrimaryHitActor &&
 776            touchDownConsumedActor != lastConsumedActor)
 777         {
 778           Dali::Actor touchDownConsumedActorHandle(touchDownConsumedActor);
 779
 780           Integration::Point currentPoint = touchEventImpl->GetPoint(0);
 781           currentPoint.SetHitActor(touchDownConsumedActorHandle);
 782           currentPoint.SetState(PointState::INTERRUPTED);
 783
 784           if(isGeometry)
 785           {
 786             std::list<Dali::Internal::Actor*> actorLists;
 787             actorLists.push_back(touchDownConsumedActor);
 788             GeoAllocAndEmitTouchSignals(actorLists, event.time, currentPoint, nullptr /* Not Required for this use case */);
 789           }
 790           else
 791           {
 792             AllocAndEmitTouchSignals(event.time, touchDownConsumedActorHandle, currentPoint, nullptr /* Not Required for this use case */);
 793           }
 794         }
 795
 796         mTouchDownConsumedActor.SetActor(nullptr);
 797         mInterceptedTouchActor.SetActor(nullptr);
 798
 799         DALI_FALLTHROUGH;
 800       }
 801
 802       case PointState::DOWN:
 803       {
 804         mScene.EmitTouchedSignal(touchEventHandle);
 805         break;
 806       }
 807
 808       case PointState::MOTION:
 809       case PointState::LEAVE:
 810       case PointState::STATIONARY:
 811       case PointState::INTERRUPTED:
 812       {
 813         // Ignore
 814         break;
 815       }
 816     }
 817   }
 818
 819   return consumed;
 820 }
 821
 822 void TouchEventProcessor::OnObservedActorDisconnected(Actor* actor)
 823 {
 824   if(mScene.IsGeometryHittestEnabled() && (actor == mLastConsumedActor.GetActor() || actor == mLastPrimaryHitActor.GetActor()))
 825   {
 826     Dali::Actor actorHandle(actor);
 827     Integration::Point point;
 828     point.SetState(PointState::INTERRUPTED);
 829     point.SetHitActor(actorHandle);
 830     if(actor == mLastConsumedActor.GetActor())
 831     {
 832       std::list<Dali::Internal::Actor*> actorLists;
 833       actorLists.push_back(mLastConsumedActor.GetActor());
 834       GeoAllocAndEmitTouchSignals(actorLists, 0, point, mLastRenderTask);
 835     }
 836     else if(!mLastConsumedActor.GetActor())
 837     {
 838       GeoAllocAndEmitTouchSignals(mCandidateActorLists, 0, point, mLastRenderTask);
 839     }
 840     // Do not set mLastPrimaryHitActor to NULL we may be iterating through its observers
 841     mLastConsumedActor.SetActor(nullptr);
 842     mLastRenderTask.Reset();
 843     mLastPrimaryPointState = PointState::FINISHED;
 844   }
 845   else
 846   {
 847     if(actor == mLastPrimaryHitActor.GetActor())
 848     {
 849       Dali::Actor actorHandle(actor);
 850       Integration::Point point;
 851       point.SetState(PointState::INTERRUPTED);
 852       point.SetHitActor(actorHandle);
 853
 854       TouchEventPtr touchEventImpl(new TouchEvent);
 855       touchEventImpl->AddPoint(point);
 856       Dali::TouchEvent touchEventHandle(touchEventImpl.Get());
 857
 858       Dali::Actor eventConsumer = EmitTouchSignals(actorHandle, touchEventHandle);
 859       if(mLastConsumedActor.GetActor() != eventConsumer)
 860       {
 861         EmitTouchSignals(Dali::Actor(mLastConsumedActor.GetActor()), touchEventHandle);
 862       }
 863
 864       // Do not set mLastPrimaryHitActor to NULL we may be iterating through its observers
 865       mLastConsumedActor.SetActor(nullptr);
 866       mLastRenderTask.Reset();
 867       mLastPrimaryPointState = PointState::FINISHED;
 868     }
 869   }
 870
 871 }
 872
 873 } // namespace Internal
 874
 875 } // namespace Dali