ash/wm/power_button_controller.h

   1 // Copyright (c) 2012 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_WM_POWER_BUTTON_CONTROLLER_H_
   6 #define ASH_WM_POWER_BUTTON_CONTROLLER_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/wm/session_state_animator.h"
  10 #include "base/basictypes.h"
  11
  12 #if defined(OS_CHROMEOS)
  13 #include "ui/display/chromeos/display_configurator.h"
  14 #endif
  15
  16 namespace gfx {
  17 class Rect;
  18 class Size;
  19 }
  20
  21 namespace ui {
  22 class Layer;
  23 }
  24
  25 namespace ash {
  26
  27 namespace test {
  28 class PowerButtonControllerTest;
  29 }
  30
  31 class LockStateController;
  32
  33 // Displays onscreen animations and locks or suspends the system in response to
  34 // the power button being pressed or released.
  35 class ASH_EXPORT PowerButtonController
  36 // TODO(derat): Remove these ifdefs after DisplayConfigurator becomes
  37 // cross-platform.
  38 #if defined(OS_CHROMEOS)
  39     : public ui::DisplayConfigurator::Observer
  40 #endif
  41       {
  42  public:
  43   explicit PowerButtonController(LockStateController* controller);
  44   virtual ~PowerButtonController();
  45
  46   void set_has_legacy_power_button_for_test(bool legacy) {
  47     has_legacy_power_button_ = legacy;
  48   }
  49
  50   // Called when the current screen brightness changes.
  51   void OnScreenBrightnessChanged(double percent);
  52
  53   // Called when the power or lock buttons are pressed or released.
  54   void OnPowerButtonEvent(bool down, const base::TimeTicks& timestamp);
  55   void OnLockButtonEvent(bool down, const base::TimeTicks& timestamp);
  56
  57 #if defined(OS_CHROMEOS)
  58   // Overriden from ui::DisplayConfigurator::Observer:
  59   virtual void OnDisplayModeChanged(
  60       const ui::DisplayConfigurator::DisplayStateList& outputs) OVERRIDE;
  61 #endif
  62
  63  private:
  64   friend class test::PowerButtonControllerTest;
  65
  66   // Are the power or lock buttons currently held?
  67   bool power_button_down_;
  68   bool lock_button_down_;
  69
  70   // Has the screen brightness been reduced to 0%?
  71   bool brightness_is_zero_;
  72
  73   // True if an internal display is off while an external display is on (e.g.
  74   // for Chrome OS's docked mode, where a Chromebook's lid is closed while an
  75   // external display is connected).
  76   bool internal_display_off_and_external_display_on_;
  77
  78   // Was a command-line switch set telling us that we're running on hardware
  79   // that misreports power button releases?
  80   bool has_legacy_power_button_;
  81
  82   LockStateController* controller_; // Not owned.
  83
  84   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
  85 };
  86
  87 }  // namespace ash
  88
  89 #endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_