1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef FOUNDATION_ACE_FRAMEWORKS_CORE_ANIMATION_MOTION_H
17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_ANIMATION_MOTION_H
18 
19 #include "base/utils/listener.h"
20 #include "core/animation/time_event.h"
21 
22 namespace OHOS::Ace {
23 
24 class Motion : public TimeEvent, public ValueListenable<double> {
25     DECLARE_ACE_TYPE(Motion, TimeEvent);
26 
27 public:
28     virtual double GetCurrentPosition() = 0;
29     virtual double GetCurrentVelocity() = 0;
30     virtual bool IsCompleted() = 0;
31 
GetMotionType()32     virtual std::string GetMotionType() const
33     {
34         return "motion";
35     }
36 
37     // Each subclass should override this method to perform motion in each timestamp.
38     virtual void Move(float offsetTime) = 0;
39 
40     // Motion do not have duration, normalizedTime always zero
OnTimestampChanged(float timestamp,float normalizedTime,bool reverse)41     void OnTimestampChanged(float timestamp, float normalizedTime, bool reverse) final
42     {
43         Move(timestamp);
44         NotifyListener(GetCurrentPosition());
45     }
46 };
47 
48 } // namespace OHOS::Ace
49 
50 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_ANIMATION_MOTION_H
51