124943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner// Copyright (c) 2013 The Chromium Authors. All rights reserved. 224943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner// Use of this source code is governed by a BSD-style license that can be 324943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner// found in the LICENSE file. 424943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner 524943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner#ifndef UI_VIEWS_WIDGET_WIDGET_DELETION_OBSERVER_H_ 624943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner#define UI_VIEWS_WIDGET_WIDGET_DELETION_OBSERVER_H_ 724943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner 824943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner#include "base/basictypes.h" 924943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner#include "base/compiler_specific.h" 1024943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner#include "ui/views/views_export.h" 1124943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner#include "ui/views/widget/widget_observer.h" 1224943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner 135f35a4be95aed0e5b2cb36f7d785bcbfc67284aeDaniel Maleanamespace views { 145f35a4be95aed0e5b2cb36f7d785bcbfc67284aeDaniel Maleaclass Widget; 1524943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner 1624943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner// A simple WidgetObserver that can be probed for the life of a widget. 1724943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattnerclass VIEWS_EXPORT WidgetDeletionObserver : public WidgetObserver { 1824943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner public: 1924943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner explicit WidgetDeletionObserver(Widget* widget); 2024943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner virtual ~WidgetDeletionObserver(); 215f35a4be95aed0e5b2cb36f7d785bcbfc67284aeDaniel Malea 2224943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner // Returns true if the widget passed in the constructor is still alive. 2324943d2ee8bfaa7cf5893e4709143924157a5c1eChris Lattner bool IsWidgetAlive() { return widget_ != NULL; } 24 25 // Overridden from WidgetObserver. 26 virtual void OnWidgetDestroying(Widget* widget) OVERRIDE; 27 28 private: 29 void CleanupWidget(); 30 31 Widget* widget_; 32 33 DISALLOW_COPY_AND_ASSIGN(WidgetDeletionObserver); 34}; 35 36} // namespace views 37 38#endif // UI_VIEWS_WIDGET_WIDGET_DELETION_OBSERVER_H_ 39