ash/display/projecting_observer_chromeos.h

   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
  11 namespace ash {
  12
  13 class 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_