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- // 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;
- // Notifies the view has been destroyed.
- virtual void OnViewAndroidDestroyed() {}
- protected:
- virtual ~ViewAndroidObserver() {}
- };
- } // namespace ui
- #endif // UI_ANDROID_VIEW_ANDROID_OBSERVER_H_
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