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- // Copyright 2017 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef COMPONENTS_EXO_POINTER_GESTURE_PINCH_DELEGATE_H_
- #define COMPONENTS_EXO_POINTER_GESTURE_PINCH_DELEGATE_H_
- #include "base/time/time.h"
- namespace exo {
- class Pointer;
- // Handles pinch event details on pointers. Used as an extension to the
- // PointerDelegate.
- class PointerGesturePinchDelegate {
- public:
- // Called at the top of the pointer's destructor, to give observers a
- // chance to remove themselves.
- virtual void OnPointerDestroying(Pointer* pointer) = 0;
- virtual void OnPointerPinchBegin(uint32_t unique_touch_event_id,
- base::TimeTicks time_stamp,
- Surface* surface) = 0;
- virtual void OnPointerPinchUpdate(base::TimeTicks time_stamp,
- float scale) = 0;
- virtual void OnPointerPinchEnd(uint32_t unique_touch_event_id,
- base::TimeTicks time_stamp) = 0;
- protected:
- virtual ~PointerGesturePinchDelegate() {}
- };
- } // namespace exo
- #endif // COMPONENTS_EXO_POINTER_GESTURE_PINCH_DELEGATE_H_
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