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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 UI_VIEWS_VIEW_TRACKER_H_
#define UI_VIEWS_VIEW_TRACKER_H_
#include "base/macros.h"
#include "ui/views/view_observer.h"
#include "ui/views/views_export.h"
namespace views {
// ViewTracker tracks a single View. When the View is deleted it's removed.
class VIEWS_EXPORT ViewTracker : public ViewObserver {
public:
explicit ViewTracker(View* view = nullptr);
~ViewTracker() override;
void SetView(View* view);
void Clear() { SetView(nullptr); }
View* view() { return view_; }
// ViewObserver:
void OnViewIsDeleting(View* observed_view) override;
private:
View* view_;
DISALLOW_COPY_AND_ASSIGN(ViewTracker);
};
} // namespace views
#endif // UI_VIEWS_VIEW_TRACKER_H_
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