| // 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); |
| virtual ~WidgetDeletionObserver(); |
| |
| // Returns true if the widget passed in the constructor is still alive. |
| bool IsWidgetAlive() { return widget_ != NULL; } |
| |
| // Overridden from WidgetObserver. |
| virtual 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_ |