dali/internal/event/events/rotation-gesture/rotation-gesture-detector-impl.h

   1 #ifndef DALI_INTERNAL_ROTATION_GESTURE_DETECTOR_H
   2 #define DALI_INTERNAL_ROTATION_GESTURE_DETECTOR_H
   3
   4 /*
   5  * Copyright (c) 2020 Samsung Electronics Co., Ltd.
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  * http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  */
  20
  21 // INTERNAL INCLUDES
  22 #include <dali/public-api/events/rotation-gesture-detector.h>
  23 #include <dali/public-api/events/rotation-gesture.h>
  24 #include <dali/internal/event/events/gesture-detector-impl.h>
  25
  26 namespace Dali
  27 {
  28
  29 namespace Internal
  30 {
  31
  32 class RotationGestureDetector;
  33
  34 using RotationGestureDetectorPtr       = IntrusivePtr<RotationGestureDetector>;
  35 using RotationGestureDetectorContainer = DerivedGestureDetectorContainer<RotationGestureDetector>::type;
  36
  37 /**
  38  * @copydoc Dali::RotationGestureDetector
  39  */
  40 class RotationGestureDetector : public GestureDetector
  41 {
  42 public: // Creation
  43
  44   /**
  45    * Create a new gesture detector.
  46    * @return A smart-pointer to the newly allocated detector.
  47    */
  48   static RotationGestureDetectorPtr New();
  49
  50   /**
  51    * Construct a new GestureDetector.
  52    */
  53   RotationGestureDetector();
  54
  55   // Not copyable
  56
  57   RotationGestureDetector( const RotationGestureDetector& )              = delete; ///< Deleted copy constructor
  58   RotationGestureDetector& operator=(const RotationGestureDetector& rhs) = delete; ///< Deleted copy assignment operator
  59
  60 public:
  61
  62   /**
  63    * Called by the RotationGestureProcessor when a rotation gesture event occurs within the bounds of our
  64    * attached actor.
  65    * @param[in]  actor     The rotated actor
  66    * @param[in]  rotation  The rotation gesture
  67    */
  68   void EmitRotationGestureSignal( Dali::Actor actor, const Dali::RotationGesture& rotation );
  69
  70 public: // Signals
  71
  72   /**
  73    * @copydoc Dali::RotationGestureDetector::DetectedSignal()
  74    */
  75   Dali::RotationGestureDetector::DetectedSignalType& DetectedSignal()
  76   {
  77     return mDetectedSignal;
  78   }
  79
  80   /**
  81    * Connects a callback function with the object's signals.
  82    * @param[in] object The object providing the signal.
  83    * @param[in] tracker Used to disconnect the signal.
  84    * @param[in] signalName The signal to connect to.
  85    * @param[in] functor A newly allocated FunctorDelegate.
  86    * @return True if the signal was connected.
  87    * @post If a signal was connected, ownership of functor was passed to CallbackBase. Otherwise the caller is responsible for deleting the unused functor.
  88    */
  89   static bool DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor );
  90
  91 protected:
  92
  93   /**
  94    * A reference counted object may only be deleted by calling Unreference()
  95    */
  96   virtual ~RotationGestureDetector() = default;
  97
  98 private: // GestureDetector overrides
  99
 100   /**
 101    * @copydoc Dali::Internal::GestureDetector::OnActorAttach(Actor&)
 102    */
 103   virtual void OnActorAttach( Actor& actor ) { /* Nothing to do */ }
 104
 105   /**
 106    * @copydoc Dali::Internal::GestureDetector::OnActorDetach(Actor&)
 107    */
 108   virtual void OnActorDetach( Actor& actor ) { /* Nothing to do */ }
 109
 110   /**
 111    * @copydoc Dali::Internal::GestureDetector::OnActorDestroyed(Object&)
 112    */
 113   virtual void OnActorDestroyed( Object& object ) { /* Nothing to do */ }
 114
 115 private:
 116
 117   Dali::RotationGestureDetector::DetectedSignalType mDetectedSignal;
 118 };
 119
 120 } // namespace Internal
 121
 122 // Helpers for public-api forwarding methods
 123
 124 inline Internal::RotationGestureDetector& GetImplementation( Dali::RotationGestureDetector& detector )
 125 {
 126   DALI_ASSERT_ALWAYS( detector && "RotationGestureDetector handle is empty" );
 127
 128   BaseObject& handle = detector.GetBaseObject();
 129
 130   return static_cast<Internal::RotationGestureDetector&>( handle );
 131 }
 132
 133 inline const Internal::RotationGestureDetector& GetImplementation( const Dali::RotationGestureDetector& detector )
 134 {
 135   DALI_ASSERT_ALWAYS( detector && "RotationGestureDetector handle is empty" );
 136
 137   const BaseObject& handle = detector.GetBaseObject();
 138
 139   return static_cast<const Internal::RotationGestureDetector&>( handle );
 140 }
 141
 142 } // namespace Dali
 143
 144 #endif // DALI_INTERNAL_ROTATION_GESTURE_DETECTOR_H