1 /* 2 * Copyright (c) 2021-2022 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_COMPONENTS_NG_GESTURES_RECOGNIZERS_PINCH_RECOGNIZER_H 17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_GESTURES_RECOGNIZERS_PINCH_RECOGNIZER_H 18 19 #include <cmath> 20 #include <functional> 21 #include <map> 22 23 #include "core/components_ng/gestures/recognizers/multi_fingers_recognizer.h" 24 25 namespace OHOS::Ace::NG { 26 27 class PinchRecognizer : public MultiFingersRecognizer { 28 DECLARE_ACE_TYPE(PinchRecognizer, MultiFingersRecognizer); 29 30 public: 31 PinchRecognizer(int32_t fingers, double distance); 32 ~PinchRecognizer() override = default; 33 34 void OnAccepted() override; 35 void OnRejected() override; 36 37 private: 38 void HandleTouchDownEvent(const TouchEvent& event) override; 39 void HandleTouchUpEvent(const TouchEvent& event) override; 40 void HandleTouchMoveEvent(const TouchEvent& event) override; 41 void HandleTouchCancelEvent(const TouchEvent& event) override; 42 void HandleTouchDownEvent(const AxisEvent& event) override; 43 void HandleTouchUpEvent(const AxisEvent& event) override; 44 void HandleTouchMoveEvent(const AxisEvent& event) override; 45 void HandleTouchCancelEvent(const AxisEvent& event) override; 46 47 bool ReconcileFrom(const RefPtr<NGGestureRecognizer>& recognizer) override; 48 double ComputeAverageDeviation(); 49 50 void OnResetStatus() override; 51 void SendCallbackMsg(const std::unique_ptr<GestureEventFunc>& callback); 52 Offset ComputePinchCenter(); 53 54 bool IsCtrlBeingPressed(); 55 56 void OnFlushTouchEventsBegin() override; 57 void OnFlushTouchEventsEnd() override; 58 59 double distance_ = 0.0; 60 double initialDev_ = 0.0; 61 double currentDev_ = 0.0; 62 double scale_ = 1.0; 63 Offset pinchCenter_; 64 TimeStamp time_; 65 TouchEvent lastTouchEvent_; 66 bool isFlushTouchEventsEnd_ = false; 67 bool isPinchEnd_ = false; 68 }; 69 70 } // namespace OHOS::Ace::NG 71 72 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_GESTURES_RECOGNIZERS_PINCH_RECOGNIZER_H 73