chrome/browser/chromeos/login/screens/update_screen_actor.h

// Copyright (c) 2012 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_CHROMEOS_LOGIN_SCREENS_UPDATE_SCREEN_ACTOR_H_
#define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_UPDATE_SCREEN_ACTOR_H_

#include "base/time/time.h"

namespace chromeos {

class UpdateScreenActor {
 public:
  // Indices for corresponding info messages during update stage.
  enum ProgressMessage {
    PROGRESS_MESSAGE_UPDATE_AVAILABLE = 0,
    PROGRESS_MESSAGE_INSTALLING_UPDATE,
    PROGRESS_MESSAGE_VERIFYING,
    PROGRESS_MESSAGE_FINALIZING
  };

  class Delegate {
   public:
    virtual ~Delegate() {}

    // Force cancel update.
    virtual void CancelUpdate() = 0;

    // Called prior to destroying |actor|.
    virtual void OnActorDestroyed(UpdateScreenActor* actor) = 0;

    // Called any time a new network connect request occurs.
    virtual void OnConnectToNetworkRequested() = 0;
  };

  virtual ~UpdateScreenActor() {}

  // Sets screen this actor belongs to.
  virtual void SetDelegate(Delegate* screen) = 0;

  // Shows the screen.
  virtual void Show() = 0;

  // Hides the screen.
  virtual void Hide() = 0;

  virtual void PrepareToShow() = 0;

  // Shows manual reboot info message.
  virtual void ShowManualRebootInfo() = 0;

  // Sets current progress in percents.
  virtual void SetProgress(int progress) = 0;

  // Shows estimated time left message.
  virtual void ShowEstimatedTimeLeft(bool visible) = 0;

  // Sets current estimation for time left in the downloading stage.
  virtual void SetEstimatedTimeLeft(const base::TimeDelta& time) = 0;

  // Shows message under progress bar.
  virtual void ShowProgressMessage(bool visible) = 0;

  // Sets message under progress bar.
  virtual void SetProgressMessage(ProgressMessage message) = 0;

  // Shows screen curtains.
  virtual void ShowCurtain(bool visible) = 0;
};

}  // namespace chromeos

#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_UPDATE_SCREEN_ACTOR_H_