| // 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_ANDROID_VIEW_ANDROID_OBSERVER_H_ |
| #define UI_ANDROID_VIEW_ANDROID_OBSERVER_H_ |
| |
| #include "ui/android/ui_android_export.h" |
| |
| namespace ui { |
| |
| class UI_ANDROID_EXPORT ViewAndroidObserver { |
| public: |
| // Notifies that view gets attached to window. Note that the notification |
| // is not sent if view is already in attached state. |
| virtual void OnAttachedToWindow() = 0; |
| |
| // Notifies that view gets detached from window. Note that the notification |
| // is not sent if view is already in detached state. |
| virtual void OnDetachedFromWindow() = 0; |
| |
| protected: |
| virtual ~ViewAndroidObserver() {} |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_ANDROID_VIEW_ANDROID_OBSERVER_H_ |