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

   1 /*
   2  * Copyright (c) 2021 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/integration-api/debug.h>
  26 #include <dali/internal/event/events/gesture-event-processor.h>
  27 #include <dali/public-api/events/pinch-gesture.h>
  28 #include <dali/public-api/object/type-registry.h>
  29
  30 namespace Dali
  31 {
  32 namespace Internal
  33 {
  34 namespace
  35 {
  36 // Signals
  37
  38 const char* const SIGNAL_PINCH_DETECTED = "pinchDetected";
  39
  40 BaseHandle Create()
  41 {
  42   return Dali::PinchGestureDetector::New();
  43 }
  44
  45 TypeRegistration mType(typeid(Dali::PinchGestureDetector), typeid(Dali::GestureDetector), Create);
  46
  47 SignalConnectorType signalConnector1(mType, SIGNAL_PINCH_DETECTED, &PinchGestureDetector::DoConnectSignal);
  48
  49 } // namespace
  50
  51 PinchGestureDetectorPtr PinchGestureDetector::New()
  52 {
  53   return new PinchGestureDetector;
  54 }
  55
  56 PinchGestureDetector::PinchGestureDetector()
  57 : GestureDetector(GestureType::PINCH)
  58 {
  59 }
  60
  61 PinchGestureDetector::~PinchGestureDetector() = default;
  62
  63 void PinchGestureDetector::EmitPinchGestureSignal(Dali::Actor actor, const Dali::PinchGesture& pinch)
  64 {
  65   // Guard against destruction during signal emission
  66   Dali::PinchGestureDetector handle(this);
  67
  68   mDetectedSignal.Emit(actor, pinch);
  69 }
  70
  71 bool PinchGestureDetector::DoConnectSignal(BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor)
  72 {
  73   bool                  connected(true);
  74   PinchGestureDetector* gesture = static_cast<PinchGestureDetector*>(object); // TypeRegistry guarantees that this is the correct type.
  75
  76   if(0 == strcmp(signalName.c_str(), SIGNAL_PINCH_DETECTED))
  77   {
  78     gesture->DetectedSignal().Connect(tracker, functor);
  79   }
  80   else
  81   {
  82     // signalName does not match any signal
  83     connected = false;
  84   }
  85
  86   return connected;
  87 }
  88
  89 void PinchGestureDetector::OnActorAttach(Actor& actor)
  90 {
  91   // Do nothing
  92 }
  93
  94 void PinchGestureDetector::OnActorDetach(Actor& actor)
  95 {
  96   // Do nothing
  97 }
  98
  99 void PinchGestureDetector::OnActorDestroyed(Object& object)
 100 {
 101   // Do nothing
 102 }
 103
 104 } // namespace Internal
 105
 106 } // namespace Dali