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// Copyright 2018 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 UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_OBSERVER_H_
#define UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_OBSERVER_H_
#include "base/observer_list_types.h"
#include "ui/events/events_export.h"
#include "ui/events/gestures/gesture_types.h"
namespace ui {
class EVENTS_EXPORT GestureRecognizerObserver : public base::CheckedObserver {
public:
virtual void OnActiveTouchesCanceledExcept(
GestureConsumer* not_cancelled) = 0;
virtual void OnEventsTransferred(
GestureConsumer* current_consumer,
GestureConsumer* new_consumer,
TransferTouchesBehavior transfer_touches_behavior) = 0;
virtual void OnActiveTouchesCanceled(GestureConsumer* consumer) = 0;
protected:
~GestureRecognizerObserver() override;
};
} // namespace ui
#endif // UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_OBSERVER_H_
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