hid_detection_screen_actor.h revision 010d83a9304c5a91596085d917d248abff47903a 
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
10namespace chromeos {
11
12// Interface between HID detection screen and its representation.
13// Note, do not forget to call OnActorDestroyed in the dtor.
14class HIDDetectionScreenActor {
15 public:
16  // Allows us to get info from HID detection screen that we need.
17  class Delegate {
18   public:
19    virtual ~Delegate() {}
20
21    // Called when screen is exited.
22    virtual void OnExit() = 0;
23
24    // This method is called, when actor is being destroyed. Note, if Delegate
25    // is destroyed earlier then it has to call SetDelegate(NULL).
26    virtual void OnActorDestroyed(HIDDetectionScreenActor* actor) = 0;
27  };
28
29  virtual ~HIDDetectionScreenActor() {}
30
31  virtual void Show() = 0;
32  virtual void Hide() = 0;
33  virtual void SetDelegate(Delegate* delegate) = 0;
34};
35
36}  // namespace chromeos
37
38#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_HID_DETECTION_SCREEN_ACTOR_H_
39
40