blob: d7046073c4d56055c9372f258867c0b6a964daf2 [file] [log] [blame]
// Copyright 2014 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.
#include "ui/views/views_export.h"
namespace views {
class Widget;
class View;
// |WidgetRemovalsObserver| complements |WidgetObserver| with additional
// notifications. These include events occurring during tear down like view
// removal. For this reason, it is recommended that subclasses not also inherit
// from |View|.
class VIEWS_EXPORT WidgetRemovalsObserver {
// Called immediately before a descendant view of |widget| is removed
// from this widget. Won't be called if the view is moved within the
// same widget, but will be called if it's moved to a different widget.
// Only called on the root of a view tree; it implies that all of the
// descendants of |view| will be removed.
virtual void OnWillRemoveView(Widget* widget, View* view) {}
virtual ~WidgetRemovalsObserver() {}
} // namespace views