1 #ifndef __DALI_INTEGRATION_PAN_GESTURE_EVENT_H__
2 #define __DALI_INTEGRATION_PAN_GESTURE_EVENT_H__
5 * Copyright (c) 2014 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/integration-api/events/gesture-event.h>
23 #include <dali/public-api/math/vector2.h>
25 namespace Dali DALI_IMPORT_API
32 * If the adaptor detects a pan gesture, then it should create an instance of this structure and
33 * send it to the Core.
35 * A Pan Gesture event should be in one of five states:
36 * - Possible: When the user first puts their finger down - Core needs to hit test the down point.
37 * - Started: If a pan is detected.
38 * - Continuing: If after a pan is detected, it continues.
39 * - Finished: If after a pan, the user lifts their finger(s).
40 * - Cancelled: If, after a down event, no pan is detected or a system interruption.
42 * A Started state will be ignored if a Possible state does not precede it.
43 * Likewise, a Continuing or Finished state will be ignored if a Started state does not precede it.
45 struct PanGestureEvent: public GestureEvent
47 // Construction & Destruction
51 * @param[in] state The state of the gesture
53 PanGestureEvent(Gesture::State state);
58 virtual ~PanGestureEvent();
63 * The previous touch position of the primary touch point in screen coordinates.
65 Vector2 previousPosition;
68 * This current touch position of the primary touch point in screen coordinates.
70 Vector2 currentPosition;
73 * The time difference between the previous and latest touch motion events (in ms).
75 unsigned long timeDelta;
78 * The total number of fingers touching the screen in a pan gesture.
80 unsigned int numberOfTouches;
83 } // namespace Integration
87 #endif // __DALI_INTEGRATION_PAN_GESTURE_EVENT_H__