ui/android/window_android_observer.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_ANDROID_WINDOW_ANDROID_OBSERVER_H_
   6 #define UI_ANDROID_WINDOW_ANDROID_OBSERVER_H_
   7
   8 #include "ui/android/ui_android_export.h"
   9
  10 namespace ui {
  11
  12 class UI_ANDROID_EXPORT WindowAndroidObserver {
  13  public:
  14   virtual void OnCompositingDidCommit() = 0;
  15   virtual void OnRootWindowVisibilityChanged(bool visible) = 0;
  16   virtual void OnAttachCompositor() = 0;
  17   virtual void OnDetachCompositor() = 0;
  18   virtual void OnVSync(base::TimeTicks frame_time,
  19                        base::TimeDelta vsync_period) = 0;
  20   virtual void OnAnimate(base::TimeTicks frame_begin_time) {}
  21
  22   // Note that activity state callbacks will only be made if the WindowAndroid
  23   // has been explicitly subscribed to receive them. The observer instance
  24   // should account for whether or not this is the case.
  25   virtual void OnActivityPaused() = 0;
  26   virtual void OnActivityResumed() = 0;
  27
  28  protected:
  29   virtual ~WindowAndroidObserver() {}
  30 };
  31
  32 }  // namespace ui
  33
  34 #endif  // UI_ANDROID_WINDOW_ANDROID_OBSERVER_H_