2 * Copyright (c) 2017 Samsung Electronics Co., Ltd.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include <dali/internal/event/events/wheel-event-processor.h>
22 #include <dali/public-api/events/wheel-event.h>
24 #include <dali/public-api/math/vector2.h>
25 #include <dali/integration-api/events/wheel-event-integ.h>
26 #include <dali/internal/event/actors/actor-impl.h>
27 #include <dali/internal/event/common/scene-impl.h>
28 #include <dali/internal/event/events/hit-test-algorithm-impl.h>
39 #if defined(DEBUG_ENABLED)
40 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_WHEEL_PROCESSOR");
44 * Recursively deliver events to the actor and its parents, until the event is consumed or the stage is reached.
46 Dali::Actor EmitWheelSignals( Dali::Actor actor, const WheelEvent& event )
48 Dali::Actor consumedActor;
52 Dali::Actor oldParent( actor.GetParent() );
54 Actor& actorImpl( GetImplementation(actor) );
56 bool consumed( false );
58 // Only do the conversion and emit the signal if the actor's wheel signal has connections.
59 if ( actorImpl.GetWheelEventRequired() )
61 // Emit the signal to the parent
62 consumed = actorImpl.EmitWheelEventSignal( event );
67 // One of this actor's listeners has consumed the event so set this actor as the consumed actor.
68 consumedActor = Dali::Actor( &actorImpl );
72 // The actor may have been removed/reparented during the signal callbacks.
73 Dali::Actor parent = actor.GetParent();
76 (parent == oldParent) )
78 // One of the actor's parents may consumed the event and they should be set as the consumed actor.
79 consumedActor = EmitWheelSignals( parent, event );
88 * The function to be used in the hit-test algorithm to check whether the actor is wheelable.
90 bool IsActorWheelableFunction(Dali::Actor actor, Dali::HitTestAlgorithm::TraverseType type)
92 bool hittable = false;
96 case Dali::HitTestAlgorithm::CHECK_ACTOR:
98 if( GetImplementation(actor).GetWheelEventRequired() && // Does the Application or derived actor type require a wheel event?
99 GetImplementation(actor).IsHittable() )
105 case Dali::HitTestAlgorithm::DESCEND_ACTOR_TREE:
107 if( actor.GetProperty< bool >( Dali::Actor::Property::VISIBLE ) ) // Actor is visible, if not visible then none of its children are visible.
122 } // unnamed namespace
125 WheelEventProcessor::WheelEventProcessor( Scene& scene )
130 WheelEventProcessor::~WheelEventProcessor()
134 void WheelEventProcessor::ProcessWheelEvent( const Integration::WheelEvent& event )
136 WheelEvent wheelEvent( static_cast< WheelEvent::Type >( event.type ), event.direction, event.modifiers, event.point, event.z, event.timeStamp );
138 if( wheelEvent.type == WheelEvent::MOUSE_WHEEL )
140 Dali::HitTestAlgorithm::Results hitTestResults;
141 HitTestAlgorithm::HitTest( mScene.GetSize(), mScene.GetRenderTaskList(), mScene.GetLayerList(), event.point, hitTestResults, IsActorWheelableFunction );
143 DALI_LOG_INFO( gLogFilter, Debug::General, " Screen(%.0f, %.0f), HitActor(%p, %s), Local(%.2f, %.2f)\n",
144 event.point.x, event.point.y,
145 ( hitTestResults.actor ? reinterpret_cast< void* >( &hitTestResults.actor.GetBaseObject() ) : NULL ),
146 ( hitTestResults.actor ? hitTestResults.actor.GetProperty< std::string >( Dali::Actor::Property::NAME ).c_str() : "" ),
147 hitTestResults.actorCoordinates.x, hitTestResults.actorCoordinates.y );
149 // Recursively deliver events to the actor and its parents, until the event is consumed or the stage is reached.
150 Dali::Actor consumedActor = EmitWheelSignals( hitTestResults.actor, wheelEvent );
152 DALI_LOG_INFO( gLogFilter, Debug::Concise, "HitActor: (%p) %s\n", hitTestResults.actor ? reinterpret_cast< void* >( &hitTestResults.actor.GetBaseObject() ) : NULL, hitTestResults.actor ? hitTestResults.actor.GetProperty< std::string >( Dali::Actor::Property::NAME ).c_str() : "" );
153 DALI_LOG_INFO( gLogFilter, Debug::Concise, "ConsumedActor: (%p) %s\n", consumedActor ? reinterpret_cast< void* >( &consumedActor.GetBaseObject() ) : NULL, consumedActor ? consumedActor.GetProperty< std::string >( Dali::Actor::Property::NAME ).c_str() : "" );
157 // if CUSTOM_WHEEL, emit the wheel event signal from the scene.
158 mScene.EmitWheelEventSignal( wheelEvent );
162 } // namespace Internal