1 #ifndef DALI_INTERNAL_EVENT_TAP_GESTURE_H
2 #define DALI_INTERNAL_EVENT_TAP_GESTURE_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/math/vector2.h>
23 #include <dali/internal/event/events/gesture-event.h>
32 * If the adaptor detects a tap gesture, then it should create an instance of this structure and
33 * send it to the Core.
35 * A Tap Gesture event should be in one of three states:
36 * - Possible: When the user first puts their finger down - Core needs to hit test the down point so
37 * that a tap (down and up quickly) is also on the same actor.
38 * - Started: If a tap is detected (No Finished state is expected).
39 * - Cancelled: If, after a down event, no tap is detected, or a system interruption.
41 * A Started state will be ignored if a Possible state does not precede it.
43 struct TapGestureEvent : public GestureEvent
45 // Construction & Destruction
49 * @param[in] state Possible, denotes down press;
50 * Started, of a tap occurs; and
51 * Cancelled, when tap does not occur.
53 TapGestureEvent( Gesture::State state );
58 virtual ~TapGestureEvent();
63 * @copydoc Dali::TapGesture::numberOfTaps
65 unsigned int numberOfTaps;
68 * @copydoc Dali::TapGesture::numberOfTouches
70 unsigned int numberOfTouches;
73 * This is the point, in screen coordinates, where the tap occurred.
74 * If a multi-touch tap, then this should be the centroid of all the touch points.
79 } // namespace Internal
83 #endif // DALI_INTERNAL_EVENT_TAP_GESTURE_H