dali/internal/event/events/pinch-gesture/pinch-gesture-detector-impl.cpp

   1 /*
   2  * Copyright (c) 2020 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/pinch-gesture/pinch-gesture-detector-impl.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <cstring> // for strcmp
  23
  24 // INTERNAL INCLUDES
  25 #include <dali/public-api/events/pinch-gesture.h>
  26 #include <dali/public-api/object/type-registry.h>
  27 #include <dali/internal/event/events/gesture-event-processor.h>
  28 #include <dali/integration-api/debug.h>
  29
  30 namespace Dali
  31 {
  32
  33 namespace Internal
  34 {
  35
  36 namespace
  37 {
  38
  39 // Signals
  40
  41 const char* const SIGNAL_PINCH_DETECTED = "pinchDetected";
  42
  43 BaseHandle Create()
  44 {
  45   return Dali::PinchGestureDetector::New();
  46 }
  47
  48 TypeRegistration mType( typeid(Dali::PinchGestureDetector), typeid(Dali::GestureDetector), Create );
  49
  50 SignalConnectorType signalConnector1( mType, SIGNAL_PINCH_DETECTED, &PinchGestureDetector::DoConnectSignal );
  51
  52 }
  53
  54
  55 PinchGestureDetectorPtr PinchGestureDetector::New()
  56 {
  57   return new PinchGestureDetector;
  58 }
  59
  60 PinchGestureDetector::PinchGestureDetector()
  61 : GestureDetector(GestureType::PINCH)
  62 {
  63 }
  64
  65 PinchGestureDetector::~PinchGestureDetector() = default;
  66
  67 void PinchGestureDetector::EmitPinchGestureSignal(Dali::Actor actor, const Dali::PinchGesture& pinch)
  68 {
  69   // Guard against destruction during signal emission
  70   Dali::PinchGestureDetector handle( this );
  71
  72   mDetectedSignal.Emit( actor, pinch );
  73 }
  74
  75 bool PinchGestureDetector::DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor )
  76 {
  77   bool connected( true );
  78   PinchGestureDetector* gesture = static_cast< PinchGestureDetector* >(object); // TypeRegistry guarantees that this is the correct type.
  79
  80   if ( 0 == strcmp( signalName.c_str(), SIGNAL_PINCH_DETECTED ) )
  81   {
  82     gesture->DetectedSignal().Connect( tracker, functor );
  83   }
  84   else
  85   {
  86     // signalName does not match any signal
  87     connected = false;
  88   }
  89
  90   return connected;
  91 }
  92
  93 void PinchGestureDetector::OnActorAttach(Actor& actor)
  94 {
  95   // Do nothing
  96 }
  97
  98 void PinchGestureDetector::OnActorDetach(Actor& actor)
  99 {
 100   // Do nothing
 101 }
 102
 103 void PinchGestureDetector::OnActorDestroyed(Object& object)
 104 {
 105   // Do nothing
 106 }
 107
 108 } // namespace Internal
 109
 110 } // namespace Dali