| // Copyright 2017 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_VIEW_TRACKER_H_ |
| #define UI_VIEWS_VIEW_TRACKER_H_ |
| |
| #include "base/macros.h" |
| #include "ui/views/view_observer.h" |
| #include "ui/views/views_export.h" |
| |
| namespace views { |
| |
| // ViewTracker tracks a single View. When the View is deleted it's removed. |
| class VIEWS_EXPORT ViewTracker : public ViewObserver { |
| public: |
| explicit ViewTracker(View* view = nullptr); |
| ~ViewTracker() override; |
| |
| void SetView(View* view); |
| void Clear() { SetView(nullptr); } |
| View* view() { return view_; } |
| |
| // ViewObserver: |
| void OnViewIsDeleting(View* observed_view) override; |
| |
| private: |
| View* view_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ViewTracker); |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_VIEW_TRACKER_H_ |