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36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
// Copyright 2023 The Chromium Embedded Framework Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be found
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// in the LICENSE file.
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#include "base/memory/raw_ptr.h"
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#include "base/scoped_observation.h"
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#include "ui/views/widget/widget_observer.h"
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// Tracks if a given widget has been destroyed.
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class WidgetDestructionObserver : public views::WidgetObserver {
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public:
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explicit WidgetDestructionObserver(views::Widget* widget) : widget_(widget) {
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DCHECK(widget);
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observation_.Observe(widget);
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}
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WidgetDestructionObserver(const WidgetDestructionObserver&) = delete;
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WidgetDestructionObserver& operator=(const WidgetDestructionObserver&) =
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delete;
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~WidgetDestructionObserver() override = default;
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// views::WidgetObserver:
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void OnWidgetDestroyed(views::Widget* widget) override {
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DCHECK(widget_);
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widget_ = nullptr;
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observation_.Reset();
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}
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views::Widget* widget() const { return widget_; }
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private:
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raw_ptr<views::Widget> widget_;
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base::ScopedObservation<views::Widget, views::WidgetObserver> observation_{
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this};
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};
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