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 chromeos {
  12 class PowerManagerClient;
  13 }
  14
  15 namespace ash {
  16
  17 class ASH_EXPORT ProjectingObserver : public ui::DisplayConfigurator::Observer {
  18  public:
  19   // |power_manager_client| must outlive this object.
  20   explicit ProjectingObserver(
  21       chromeos::PowerManagerClient* power_manager_client);
  22   virtual ~ProjectingObserver();
  23
  24   // Called when a casting session is started or stopped.
  25   void OnCastingSessionStartedOrStopped(bool started);
  26
  27   // DisplayConfigurator::Observer implementation:
  28   virtual void OnDisplayModeChanged(
  29       const ui::DisplayConfigurator::DisplayStateList& outputs) override;
  30
  31  private:
  32   // Sends the current projecting state to power manager.
  33   void SetIsProjecting();
  34
  35   // True if at least one output is internal. This value is updated when
  36   // |OnDisplayModeChanged| is called.
  37   bool has_internal_output_;
  38
  39   // Keeps track of the number of connected outputs.
  40   int output_count_;
  41
  42   // Number of outstanding casting sessions.
  43   int casting_session_count_;
  44
  45   // Weak pointer to the DBusClient PowerManagerClient;
  46   chromeos::PowerManagerClient* power_manager_client_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(ProjectingObserver);
  49 };
  50
  51 }  // namespace ash
  52
  53 #endif  // ASH_DISPLAY_PROJECTING_OBSERVER_CHROMEOS_H_