1// Copyright 2014 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 CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_HID_DETECTION_SCREEN_ACTOR_H_
6#define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_HID_DETECTION_SCREEN_ACTOR_H_
7
8#include <string>
9
10#include "base/callback_forward.h"
11
12namespace chromeos {
13
14// Interface between HID detection screen and its representation.
15// Note, do not forget to call OnActorDestroyed in the dtor.
16class HIDDetectionScreenActor {
17 public:
18  // Allows us to get info from HID detection screen that we need.
19  class Delegate {
20   public:
21    virtual ~Delegate() {}
22
23    // Called when screen is exited.
24    virtual void OnExit() = 0;
25
26    // This method is called, when actor is being destroyed. Note, if Delegate
27    // is destroyed earlier then it has to call SetDelegate(NULL).
28    virtual void OnActorDestroyed(HIDDetectionScreenActor* actor) = 0;
29  };
30
31  virtual ~HIDDetectionScreenActor() {}
32
33  virtual void Show() = 0;
34  virtual void Hide() = 0;
35  virtual void SetDelegate(Delegate* delegate) = 0;
36
37  // Checks if we should show the screen or enough devices already present.
38  // Calls corresponding set of actions based on the bool result.
39  virtual void CheckIsScreenRequired(
40      const base::Callback<void(bool)>& on_check_done) = 0;
41};
42
43}  // namespace chromeos
44
45#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_HID_DETECTION_SCREEN_ACTOR_H_
46
47