[Tizen] Refactor the GestureDetector (#2059)

Xamarin.Forms.Platform.Tizen/GestureDetector.cs

@@ -19,6 +19,8 @@ namespace Xamarin.Forms.Platform.Tizen
 		double _longTapTime = 0;
 		int _horizontalSwipeTime = 0;
 		int _verticalSwipeTime = 0;
+		bool _inputTransparent = false;
+		bool _isEnabled = true;
 
 		View View => _renderer.Element as View;
 
@@ -26,21 +28,33 @@ namespace Xamarin.Forms.Platform.Tizen
 		{
 			get
 			{
-				if (_gestureLayer != null)
-					return _gestureLayer.IsEnabled;
-
-				return false;
+				return _isEnabled;
 			}
 			set
 			{
-				if (_gestureLayer != null)
-					_gestureLayer.IsEnabled = value;
+				_isEnabled = value;
+				UpdateGestureLayerEnabled();
+			}
+		}
+
+		public bool InputTransparent
+		{
+			get
+			{
+				return _inputTransparent;
+			}
+			set
+			{
+				_inputTransparent = value;
+				UpdateGestureLayerEnabled();
 			}
 		}
 
 		public GestureDetector(IVisualElementRenderer renderer)
 		{
 			_renderer = renderer;
+			_isEnabled = View.IsEnabled;
+			_inputTransparent = View.InputTransparent;
 
 			(View.GestureRecognizers as ObservableCollection<IGestureRecognizer>).CollectionChanged += OnGestureRecognizerCollectionChanged;
 
@@ -75,9 +89,18 @@ namespace Xamarin.Forms.Platform.Tizen
 				_gestureLayer = null;
 				Clear();
 			};
-			_gestureLayer.IsEnabled = _renderer.Element.IsEnabled;
+			UpdateGestureLayerEnabled();
 		}
 
+		void UpdateGestureLayerEnabled()
+		{
+			if (_gestureLayer != null)
+			{
+				_gestureLayer.IsEnabled = !_inputTransparent && _isEnabled;
+			}
+		}
+
+
 		void AddGestures(IEnumerable<IGestureRecognizer> recognizers)
 		{
 			foreach (var item in recognizers)
@@ -457,12 +480,7 @@ namespace Xamarin.Forms.Platform.Tizen
 
 		GestureHandler CreateHandler(IGestureRecognizer recognizer)
 		{
-			var handlerType = Registrar.Registered.GetHandlerTypeForObject(recognizer);
-
-			if (handlerType != null)
-				return (GestureHandler)Activator.CreateInstance(handlerType, recognizer);
-			else
-				return null;
+			return Registrar.Registered.GetHandlerForObject<GestureHandler>(recognizer, recognizer);
 		}
 
 		GestureHandler LookupHandler(IGestureRecognizer recognizer)

Xamarin.Forms.Platform.Tizen/Renderers/LayoutRenderer.cs

@@ -57,7 +57,6 @@ namespace Xamarin.Forms.Platform.Tizen
 		{
 			if (initialize && Element.InputTransparent == default(bool))
 			{
-				NativeView.RepeatEvents = Element.CascadeInputTransparent;
 				return;
 			}
 
@@ -67,23 +66,21 @@ namespace Xamarin.Forms.Platform.Tizen
 				{
 					//Ignore all events of both layout and it's chidren
 					NativeView.PassEvents = true;
-					GestureDetector.IsEnabled = Element.IsEnabled;
 				}
 				else
 				{
 					//Ignore Layout's event only. Children's events should be allowded.
 					NativeView.PassEvents = false;
 					NativeView.RepeatEvents = true;
-					GestureDetector.IsEnabled = false;
 				}
 			}
 			else
 			{
 				//Allow layout's events and children's events would be determined by CascadeInputParent.
 				NativeView.PassEvents = false;
-				NativeView.RepeatEvents = Element.CascadeInputTransparent;
-				GestureDetector.IsEnabled = Element.IsEnabled;
+				NativeView.RepeatEvents = false;
 			}
+			GestureDetector.InputTransparent = Element.InputTransparent;
 		}
 
 		void OnLayoutUpdated(object sender, Native.LayoutEventArgs e)

Xamarin.Forms.Platform.Tizen/Renderers/ViewRenderer.cs

@@ -33,16 +33,6 @@ namespace Xamarin.Forms.Platform.Tizen
 			}
 		}
 
-		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
-		{
-			base.OnElementPropertyChanged(sender, e);
-
-			if (e.PropertyName == VisualElement.IsEnabledProperty.PropertyName)
-			{
-				UpdateIsEnabled();
-			}
-		}
-
 		/// <summary>
 		/// Native control associated with this renderer.
 		/// </summary>
@@ -60,8 +50,9 @@ namespace Xamarin.Forms.Platform.Tizen
 			SetNativeView(control);
 		}
 
-		void UpdateIsEnabled()
+		protected override void UpdateIsEnabled(bool initialize)
 		{
+			base.UpdateIsEnabled(initialize);
 			_gestureDetector.Value.IsEnabled = Element.IsEnabled;
 		}
 	}

Xamarin.Forms.Platform.Tizen/Renderers/VisualElementRenderer.cs

@@ -766,7 +766,7 @@ namespace Xamarin.Forms.Platform.Tizen
 		/// <summary>
 		/// Updates the IsEnabled property.
 		/// </summary>
-		void UpdateIsEnabled(bool initialize)
+		protected virtual void UpdateIsEnabled(bool initialize)
 		{
 			if (initialize && Element.IsEnabled)
 				return;