1 #ifndef DALI_TOUCH_POINT_H
2 #define DALI_TOUCH_POINT_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 <cstdint> // uint32_t
25 #include <dali/public-api/common/vector-wrapper.h>
26 #include <dali/public-api/actors/actor.h>
27 #include <dali/public-api/math/vector2.h>
32 * @addtogroup dali_core_events
37 * @brief A TouchPoint represents a point on the screen that is currently being touched
38 * or where touch has stopped.
41 struct DALI_CORE_API TouchPoint
46 * @brief Enumeration for Touch state.
51 Started, /**< Touch or hover started */
52 Finished, /**< Touch or hover finished */
53 Down = Started, /**< Screen touched */
54 Up = Finished, /**< Touch stopped */
55 Motion, /**< Finger dragged or hovered */
56 Leave, /**< Leave the boundary of an actor */
57 Stationary, /**< No change from last event. Useful when a multi-point event occurs where
58 all points are sent but indicates that this particular point has not changed
59 since the last time */
60 Interrupted, /**< A system event has occurred which has interrupted the touch or hover event sequence. */
61 Last /**< Number of states. */
64 // Construction & Destruction
70 * @param[in] id The touch device ID
71 * @param[in] state The state
72 * @param[in] screenX The X co-ordinate relative to the screen's origin
73 * @param[in] screenY The Y co-ordinate relative to the screen's origin
75 TouchPoint(int32_t id, State state, float screenX, float screenY);
81 * @param[in] id The touch device ID
82 * @param[in] state The state
83 * @param[in] screenX The X co-ordinate relative to the screen's origin
84 * @param[in] screenY The Y co-ordinate relative to the screen's origin
85 * @param[in] localX The X co-ordinate relative to the top-left (0.0, 0.0, 0.5) of the actor
86 * @param[in] localY The Y co-ordinate relative to the top-left (0.0, 0.0, 0.5) of the actor
88 TouchPoint(int32_t id, State state, float screenX, float screenY, float localX, float localY);
99 * @brief Each touch point has a unique device ID which specifies the touch device for that point.
104 * @brief State of the point.
111 * @brief The actor that was underneath the touch point.
116 * @brief The co-ordinates relative to the top-left of the hit-actor.
118 * @note The top-left of an actor is (0.0, 0.0, 0.5).
119 * @note If you require the local coordinates of another actor (e.g the parent of the hit actor),
120 * then you should use Actor::ScreenToLocal().
125 * @brief The co-ordinates relative to the top-left of the screen.
130 typedef std::vector<TouchPoint> TouchPointContainer; ///< Container of touch points. @SINCE_1_0.0
131 typedef TouchPointContainer::iterator TouchPointContainerIterator; ///< Iterator for Dali::TouchPointContainer @SINCE_1_0.0
132 typedef TouchPointContainer::const_iterator TouchPointContainerConstIterator; ///< Const iterator for Dali::TouchPointContainer @SINCE_1_0.0
139 #endif // DALI_TOUCH_POINT_H