1 #ifndef DALI_INTERNAL_EVENT_TAP_GESTURE_H
2 #define DALI_INTERNAL_EVENT_TAP_GESTURE_H
5 * Copyright (c) 2022 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/internal/event/events/gesture-event.h>
23 #include <dali/public-api/math/vector2.h>
30 * If the adaptor detects a tap gesture, then it should create an instance of this structure and
31 * send it to the Core.
33 * A Tap Gesture event should be in one of three states:
34 * - POSSIBLE: When the user first puts their finger down - Core needs to hit test the down point so
35 * that a tap (down and up quickly) is also on the same actor.
36 * - STARTED: If a tap is detected (No FINISHED state is expected).
37 * - CANCELLED: If, after a down event, no tap is detected, or a system interruption.
39 * A STARTED state will be ignored if a POSSIBLE state does not precede it.
41 struct TapGestureEvent : public GestureEvent
43 // Construction & Destruction
47 * @param[in] state POSSIBLE, denotes down press;
48 * STARTED, of a tap occurs; and
49 * CANCELLED, when tap does not occur.
51 TapGestureEvent(GestureState state);
56 ~TapGestureEvent() override;
61 * @copydoc Dali::TapGesture::numberOfTaps
63 unsigned int numberOfTaps;
66 * @copydoc Dali::TapGesture::numberOfTouches
68 unsigned int numberOfTouches;
71 * This is the point, in screen coordinates, where the tap occurred.
72 * If a multi-touch tap, then this should be the centroid of all the touch points.
77 } // namespace Internal
81 #endif // DALI_INTERNAL_EVENT_TAP_GESTURE_H