dali/internal/event/events/tap-gesture/tap-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/tap-gesture/tap-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/tap-gesture.h>
  28 #include <dali/public-api/object/type-registry.h>
  29
  30 namespace Dali
  31 {
  32 namespace Internal
  33 {
  34 namespace
  35 {
  36 const unsigned int DEFAULT_TAPS_REQUIRED    = 1u;
  37 const unsigned int DEFAULT_TOUCHES_REQUIRED = 1u;
  38
  39 // Signals
  40 const char* const SIGNAL_TAP_DETECTED = "tapDetected";
  41
  42 BaseHandle Create()
  43 {
  44   return Dali::TapGestureDetector::New();
  45 }
  46
  47 TypeRegistration mType(typeid(Dali::TapGestureDetector), typeid(Dali::GestureDetector), Create);
  48
  49 SignalConnectorType signalConnector1(mType, SIGNAL_TAP_DETECTED, &TapGestureDetector::DoConnectSignal);
  50
  51 } // namespace
  52
  53 TapGestureDetectorPtr TapGestureDetector::New()
  54 {
  55   return new TapGestureDetector;
  56 }
  57
  58 TapGestureDetectorPtr TapGestureDetector::New(unsigned int tapsRequired)
  59 {
  60   return new TapGestureDetector(tapsRequired);
  61 }
  62
  63 TapGestureDetector::TapGestureDetector()
  64 : GestureDetector(GestureType::TAP),
  65   mMinimumTapsRequired(DEFAULT_TAPS_REQUIRED),
  66   mMaximumTapsRequired(DEFAULT_TAPS_REQUIRED),
  67   mTouchesRequired(DEFAULT_TOUCHES_REQUIRED)
  68 {
  69 }
  70
  71 TapGestureDetector::TapGestureDetector(unsigned int tapsRequired)
  72 : GestureDetector(GestureType::TAP),
  73   mMinimumTapsRequired(tapsRequired),
  74   mMaximumTapsRequired(tapsRequired),
  75   mTouchesRequired(DEFAULT_TOUCHES_REQUIRED)
  76 {
  77 }
  78
  79 TapGestureDetector::~TapGestureDetector() = default;
  80
  81 void TapGestureDetector::SetMinimumTapsRequired(unsigned int taps)
  82 {
  83   if(mMinimumTapsRequired != taps)
  84   {
  85     mMinimumTapsRequired = taps;
  86
  87     if(!mAttachedActors.empty())
  88     {
  89       mGestureEventProcessor.GestureDetectorUpdated(this);
  90     }
  91   }
  92 }
  93
  94 void TapGestureDetector::SetMaximumTapsRequired(unsigned int taps)
  95 {
  96   if(mMaximumTapsRequired != taps)
  97   {
  98     mMaximumTapsRequired = taps;
  99
 100     if(!mAttachedActors.empty())
 101     {
 102       mGestureEventProcessor.GestureDetectorUpdated(this);
 103     }
 104   }
 105 }
 106
 107 void TapGestureDetector::SetTouchesRequired(unsigned int touches)
 108 {
 109   if(mTouchesRequired != touches)
 110   {
 111     mTouchesRequired = touches;
 112
 113     if(!mAttachedActors.empty())
 114     {
 115       mGestureEventProcessor.GestureDetectorUpdated(this);
 116     }
 117   }
 118 }
 119
 120 unsigned int TapGestureDetector::GetMinimumTapsRequired() const
 121 {
 122   return mMinimumTapsRequired;
 123 }
 124
 125 unsigned int TapGestureDetector::GetMaximumTapsRequired() const
 126 {
 127   return mMaximumTapsRequired;
 128 }
 129
 130 unsigned int TapGestureDetector::GetTouchesRequired() const
 131 {
 132   return mTouchesRequired;
 133 }
 134
 135 void TapGestureDetector::EmitTapGestureSignal(Dali::Actor tappedActor, const Dali::TapGesture& tap)
 136 {
 137   // Guard against destruction during signal emission
 138   Dali::TapGestureDetector handle(this);
 139
 140   mDetectedSignal.Emit(tappedActor, tap);
 141 }
 142
 143 bool TapGestureDetector::DoConnectSignal(BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor)
 144 {
 145   bool                connected(true);
 146   TapGestureDetector* gesture = static_cast<TapGestureDetector*>(object); // TypeRegistry guarantees that this is the correct type.
 147
 148   if(0 == strcmp(signalName.c_str(), SIGNAL_TAP_DETECTED))
 149   {
 150     gesture->DetectedSignal().Connect(tracker, functor);
 151   }
 152   else
 153   {
 154     // signalName does not match any signal
 155     connected = false;
 156   }
 157
 158   return connected;
 159 }
 160
 161 void TapGestureDetector::OnActorAttach(Actor& actor)
 162 {
 163   // Do nothing
 164 }
 165
 166 void TapGestureDetector::OnActorDetach(Actor& actor)
 167 {
 168   // Do nothing
 169 }
 170
 171 void TapGestureDetector::OnActorDestroyed(Object& object)
 172 {
 173   // Do nothing
 174 }
 175
 176 } // namespace Internal
 177
 178 } // namespace Dali