chrome/browser/ui/global_media_controls/media_notification_container_observer.h

// Copyright 2019 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 CHROME_BROWSER_UI_GLOBAL_MEDIA_CONTROLS_MEDIA_NOTIFICATION_CONTAINER_OBSERVER_H_
#define CHROME_BROWSER_UI_GLOBAL_MEDIA_CONTROLS_MEDIA_NOTIFICATION_CONTAINER_OBSERVER_H_

#include "base/observer_list_types.h"

class MediaNotificationContainerObserver : public base::CheckedObserver {
 public:
  // Called when the container's expanded state changes.
  virtual void OnContainerExpanded(bool expanded) = 0;

  // Called when the metadata displayed in the container changes.
  virtual void OnContainerMetadataChanged() = 0;

  // Called when the container is dismissed from the dialog.
  virtual void OnContainerDismissed(const std::string& id) = 0;

  // Called when the container is about to be deleted.
  virtual void OnContainerDestroyed(const std::string& id) = 0;

 protected:
  ~MediaNotificationContainerObserver() override = default;
};

#endif  // CHROME_BROWSER_UI_GLOBAL_MEDIA_CONTROLS_MEDIA_NOTIFICATION_CONTAINER_OBSERVER_H_