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// Copyright (c) 2013 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_WIDGET_WIDGET_DELETION_OBSERVER_H_
#define UI_VIEWS_WIDGET_WIDGET_DELETION_OBSERVER_H_
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "ui/views/views_export.h"
#include "ui/views/widget/widget_observer.h"
namespace views {
class Widget;
// A simple WidgetObserver that can be probed for the life of a widget.
class VIEWS_EXPORT WidgetDeletionObserver : public WidgetObserver {
public:
explicit WidgetDeletionObserver(Widget* widget);
~WidgetDeletionObserver() override;
// Returns true if the widget passed in the constructor is still alive.
bool IsWidgetAlive() { return widget_ != NULL; }
// Overridden from WidgetObserver.
void OnWidgetDestroying(Widget* widget) override;
private:
void CleanupWidget();
Widget* widget_;
DISALLOW_COPY_AND_ASSIGN(WidgetDeletionObserver);
};
} // namespace views
#endif // UI_VIEWS_WIDGET_WIDGET_DELETION_OBSERVER_H_
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