projecting_observer_chromeos.h revision c5cede9ae108bb15f6b7a8aea21c7e1fefa2834c 
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 ASH_DISPLAY_PROJECTING_OBSERVER_CHROMEOS_H_
6#define ASH_DISPLAY_PROJECTING_OBSERVER_CHROMEOS_H_
7
8#include "ash/ash_export.h"
9#include "ui/display/chromeos/display_configurator.h"
10
11namespace ash {
12
13class ASH_EXPORT ProjectingObserver : public ui::DisplayConfigurator::Observer {
14 public:
15  ProjectingObserver();
16  virtual ~ProjectingObserver();
17
18  // Called when a casting session is started or stopped.
19  void OnCastingSessionStartedOrStopped(bool started);
20
21  // DisplayConfigurator::Observer implementation:
22  virtual void OnDisplayModeChanged(
23      const ui::DisplayConfigurator::DisplayStateList& outputs) OVERRIDE;
24
25 private:
26  // Sends the current projecting state to power manager.
27  void SetIsProjecting();
28
29  // True if at least one output is internal. This value is updated when
30  // |OnDisplayModeChanged| is called.
31  bool has_internal_output_;
32
33  // Keeps track of the number of connected outputs.
34  int output_count_;
35
36  // Number of outstanding casting sessions.
37  int casting_session_count_;
38
39  DISALLOW_COPY_AND_ASSIGN(ProjectingObserver);
40};
41
42}  // namespace ash
43
44#endif  // ASH_DISPLAY_PROJECTING_OBSERVER_CHROMEOS_H_
45