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

   1 /*
   2  * Copyright (c) 2014 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-detector-impl.h>
  20
  21 // INTERNAL INCLUDES
  22 #include <dali/public-api/events/tap-gesture.h>
  23 #include <dali/public-api/object/type-registry.h>
  24 #include <dali/integration-api/debug.h>
  25 #include <dali/internal/event/events/gesture-event-processor.h>
  26
  27 namespace Dali
  28 {
  29
  30 namespace Internal
  31 {
  32
  33 namespace
  34 {
  35 BaseHandle Create()
  36 {
  37   return Dali::TapGestureDetector::New();
  38 }
  39
  40 TypeRegistration mType( typeid(Dali::TapGestureDetector), typeid(Dali::GestureDetector), Create );
  41
  42 SignalConnectorType signalConnector1( mType, Dali::TapGestureDetector::SIGNAL_TAP_DETECTED, &TapGestureDetector::DoConnectSignal );
  43
  44 }
  45
  46 TapGestureDetectorPtr TapGestureDetector::New()
  47 {
  48   return new TapGestureDetector;
  49 }
  50
  51 TapGestureDetectorPtr TapGestureDetector::New(unsigned int tapsRequired, unsigned int touchesRequired)
  52 {
  53   return new TapGestureDetector(tapsRequired, touchesRequired);
  54 }
  55
  56 TapGestureDetector::TapGestureDetector()
  57 : GestureDetector(Gesture::Tap),
  58   mTapsRequired(1),
  59   mTouchesRequired(1)
  60 {
  61 }
  62
  63 TapGestureDetector::TapGestureDetector(unsigned int tapsRequired, unsigned int touchesRequired)
  64 : GestureDetector(Gesture::Tap),
  65   mTapsRequired(tapsRequired),
  66   mTouchesRequired(touchesRequired)
  67 {
  68 }
  69
  70 TapGestureDetector::~TapGestureDetector()
  71 {
  72 }
  73
  74 void TapGestureDetector::SetTapsRequired(unsigned int taps)
  75 {
  76   DALI_ASSERT_ALWAYS(taps > 0 && "Can only set a positive number of taps" );
  77
  78   if (mTapsRequired != taps)
  79   {
  80     mTapsRequired = taps;
  81
  82     if (!mAttachedActors.empty())
  83     {
  84       mGestureEventProcessor.GestureDetectorUpdated(this);
  85     }
  86   }
  87 }
  88
  89 void TapGestureDetector::SetTouchesRequired(unsigned int touches)
  90 {
  91   DALI_ASSERT_ALWAYS(touches > 0 && "Can only set a positive number of touches" );
  92
  93   if (mTouchesRequired != touches)
  94   {
  95     mTouchesRequired = touches;
  96
  97     if (!mAttachedActors.empty())
  98     {
  99       mGestureEventProcessor.GestureDetectorUpdated(this);
 100     }
 101   }
 102 }
 103
 104 unsigned int TapGestureDetector::GetTapsRequired() const
 105 {
 106   return mTapsRequired;
 107 }
 108
 109 unsigned int TapGestureDetector::GetTouchesRequired() const
 110 {
 111   return mTouchesRequired;
 112 }
 113
 114 void TapGestureDetector::EmitTapGestureSignal(Dali::Actor tappedActor, const TapGesture& tap)
 115 {
 116   // Guard against destruction during signal emission
 117   Dali::TapGestureDetector handle( this );
 118
 119   mDetectedSignal.Emit( tappedActor, tap );
 120 }
 121
 122 bool TapGestureDetector::DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor )
 123 {
 124   bool connected( true );
 125   TapGestureDetector* gesture = dynamic_cast<TapGestureDetector*>(object);
 126
 127   if ( Dali::TapGestureDetector::SIGNAL_TAP_DETECTED  == signalName )
 128   {
 129     gesture->DetectedSignal().Connect( tracker, functor );
 130   }
 131   else
 132   {
 133     // signalName does not match any signal
 134     connected = false;
 135   }
 136
 137   return connected;
 138 }
 139
 140 void TapGestureDetector::OnActorAttach(Actor& actor)
 141 {
 142   // Do nothing
 143 }
 144
 145 void TapGestureDetector::OnActorDetach(Actor& actor)
 146 {
 147   // Do nothing
 148 }
 149
 150 void TapGestureDetector::OnActorDestroyed(Object& object)
 151 {
 152   // Do nothing
 153 }
 154
 155 } // namespace Internal
 156
 157 } // namespace Dali