2 * Copyright (c) 2014 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>
23 #include <dali/devel-api/events/hit-test-algorithm.h>
24 #include <dali/public-api/math/vector2.h>
25 #include <dali/integration-api/events/wheel-event-integ.h>
26 #include <dali/internal/event/common/stage-impl.h>
27 #include <dali/internal/event/actors/actor-impl.h>
38 #if defined(DEBUG_ENABLED)
39 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_WHEEL_PROCESSOR");
43 * Recursively deliver events to the actor and its parents, until the event is consumed or the stage is reached.
45 Dali::Actor EmitWheelSignals( Dali::Actor actor, const WheelEvent& event )
47 Dali::Actor consumedActor;
51 Dali::Actor oldParent( actor.GetParent() );
53 Actor& actorImpl( GetImplementation(actor) );
55 bool consumed( false );
57 // Only do the conversion and emit the signal if the actor's wheel signal has connections.
58 if ( actorImpl.GetWheelEventRequired() )
60 // Emit the signal to the parent
61 consumed = actorImpl.EmitWheelEventSignal( event );
66 // One of this actor's listeners has consumed the event so set this actor as the consumed actor.
67 consumedActor = Dali::Actor( &actorImpl );
71 // The actor may have been removed/reparented during the signal callbacks.
72 Dali::Actor parent = actor.GetParent();
75 (parent == oldParent) )
77 // One of the actor's parents may consumed the event and they should be set as the consumed actor.
78 consumedActor = EmitWheelSignals( parent, event );
87 * The function to be used in the hit-test algorithm to check whether the actor is wheelable.
89 bool IsActorWheelableFunction(Dali::Actor actor, Dali::HitTestAlgorithm::TraverseType type)
91 bool hittable = false;
95 case Dali::HitTestAlgorithm::CHECK_ACTOR:
97 if( GetImplementation(actor).GetWheelEventRequired() && // Does the Application or derived actor type require a wheel event?
98 GetImplementation(actor).IsHittable() )
104 case Dali::HitTestAlgorithm::DESCEND_ACTOR_TREE:
106 if( actor.IsVisible() ) // Actor is visible, if not visible then none of its children are visible.
121 } // unnamed namespace
124 WheelEventProcessor::WheelEventProcessor(Stage& stage)
129 WheelEventProcessor::~WheelEventProcessor()
133 void WheelEventProcessor::ProcessWheelEvent(const Integration::WheelEvent& event)
135 Stage& stage = mStage;
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 HitTestAlgorithm::Results hitTestResults;
141 HitTestAlgorithm::HitTest( Dali::Stage(&stage), 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 ? (void*)&hitTestResults.actor.GetBaseObject() : NULL ),
146 ( hitTestResults.actor ? hitTestResults.actor.GetName().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 ? (void*)&hitTestResults.actor.GetBaseObject() : NULL, hitTestResults.actor ? hitTestResults.actor.GetName().c_str() : "" );
153 DALI_LOG_INFO( gLogFilter, Debug::Concise, "ConsumedActor: (%p) %s\n", consumedActor ? (void*)&consumedActor.GetBaseObject() : NULL, consumedActor ? consumedActor.GetName().c_str() : "" );
157 // if CUSTOM_WHEEL, emit the key event signal from stage.
158 mStage.EmitWheelEventSignal( wheelEvent );
162 } // namespace Internal