blob: 77f78719a34b63bb72416306e797ea3d9ddd9325 [file] [log] [blame]
// 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.
#include "base/time/time.h"
namespace exo {
class Pointer;
// Handles pinch event details on pointers. Used as an extension to the
// PointerDelegate.
class PointerGesturePinchDelegate {
// 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;
virtual ~PointerGesturePinchDelegate() {}
} // namespace exo