1 #ifndef DALI_INTERNAL_GESTURE_RECOGNIZER_H
2 #define DALI_INTERNAL_GESTURE_RECOGNIZER_H
5 * Copyright (c) 2019 Samsung Electronics Co., Ltd.
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
11 * http://www.apache.org/licenses/LICENSE-2.0
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.
22 #include <dali/public-api/common/vector-wrapper.h>
23 #include <dali/public-api/events/gesture.h>
24 #include <dali/public-api/math/vector2.h>
25 #include <dali/public-api/object/ref-object.h>
26 #include <dali/internal/event/events/gesture-event.h>
42 class RecognizerObserver
45 virtual void Process( Scene& scene, const T& event ) = 0;
47 virtual ~RecognizerObserver(){};
52 * Abstract Base class for all adaptor gesture detectors.
54 * @note this may be replaced by gesture events sent directly from X.
56 class GestureRecognizer : public RefObject
60 * Called when it gets a touch event. The gesture recognizer should
61 * evaluate this event along with previously received events to determine
62 * whether the gesture they require has taken place.
63 * @param[in] event The latest touch event.
65 virtual void SendEvent(const Integration::TouchEvent& event) = 0;
68 * Called when Core updates the gesture's detection requirements.
69 * @param[in] request The updated detection requirements.
71 virtual void Update(const GestureRequest& request) = 0;
74 * Returns the type of gesture detector.
75 * @return Type of gesture detector.
77 Gesture::Type GetType() const { return mType; }
79 void SendEvent(Scene& scene, const Integration::TouchEvent& event)
88 * Protected Constructor. Should only be able to create derived class objects.
89 * @param[in] screenSize The size of the screen.
90 * @param[in] detectorType The type of gesture detector.
92 GestureRecognizer( Vector2 screenSize, Gesture::Type detectorType )
93 : mScreenSize(screenSize),
100 * Virtual destructor.
102 virtual ~GestureRecognizer() {}
110 typedef IntrusivePtr<GestureRecognizer> GestureRecognizerPtr;
112 } // namespace Internal
116 #endif // DALI_INTERNAL_GESTURE_RECOGNIZER_H