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ash / public / cpp / wallpaper / wallpaper_controller_observer.h [blame]

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef ASH_PUBLIC_CPP_WALLPAPER_WALLPAPER_CONTROLLER_OBSERVER_H_
#define ASH_PUBLIC_CPP_WALLPAPER_WALLPAPER_CONTROLLER_OBSERVER_H_

#include "ash/public/cpp/ash_public_export.h"
#include "ash/public/cpp/wallpaper/online_wallpaper_params.h"

namespace ash {

// Used to listen for wallpaper state changes.
class ASH_PUBLIC_EXPORT WallpaperControllerObserver {
 public:
  WallpaperControllerObserver();

  WallpaperControllerObserver(const WallpaperControllerObserver&) = delete;
  WallpaperControllerObserver& operator=(const WallpaperControllerObserver&) =
      delete;

  // Invoked when the online wallpaper changes.
  virtual void OnOnlineWallpaperSet(const OnlineWallpaperParams& params) {}

  // Invoked when the wallpaper is about to change.
  virtual void OnWallpaperChanging() {}

  // Invoked when the wallpaper is changed.
  virtual void OnWallpaperChanged() {}

  // Invoked when the wallpaper is resized.
  virtual void OnWallpaperResized() {}

  // Invoked when the colors extracted from the current wallpaper change.
  virtual void OnWallpaperColorsChanged() {}

  // Invoked when the blur state of the wallpaper changes.
  // TODO(crbug.com/41408561): Remove this after web-ui login code is completely
  // removed.
  virtual void OnWallpaperBlurChanged() {}

  // Invoked when the wallpaper preview mode starts.
  virtual void OnWallpaperPreviewStarted() {}

  // Invoked when the wallpaper preview mode ends.
  virtual void OnWallpaperPreviewEnded() {}

  // Invoked when the first wallpaper is set. The first wallpaper is the one
  // shown right after boot splash screen or after a session restart.
  virtual void OnFirstWallpaperShown() {}

  // Invoked after a user successfully sets a wallpaper.
  virtual void OnUserSetWallpaper(const AccountId& account_id) {}

  // Invoked when the WallpaperDailyRefreshScheduler triggers
  // OnCheckpointChanged().
  virtual void OnDailyRefreshCheckpointChanged() {}

 protected:
  virtual ~WallpaperControllerObserver();
};

}  // namespace ash

#endif  // ASH_PUBLIC_CPP_WALLPAPER_WALLPAPER_CONTROLLER_OBSERVER_H_