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 namespace gfx {
  13 class Rect;
  14 class Size;
  15 }
  16
  17 namespace ui {
  18 class Layer;
  19 }
  20
  21 namespace ash {
  22
  23 namespace test {
  24 class PowerButtonControllerTest;
  25 }
  26
  27 class SessionStateController;
  28
  29 // Displays onscreen animations and locks or suspends the system in response to
  30 // the power button being pressed or released.
  31 class ASH_EXPORT PowerButtonController {
  32  public:
  33
  34   explicit PowerButtonController(SessionStateController* controller);
  35   virtual ~PowerButtonController();
  36
  37   void set_has_legacy_power_button_for_test(bool legacy) {
  38     has_legacy_power_button_ = legacy;
  39   }
  40
  41   // Called when the current screen brightness changes.
  42   void OnScreenBrightnessChanged(double percent);
  43
  44   // Called when the power or lock buttons are pressed or released.
  45   void OnPowerButtonEvent(bool down, const base::TimeTicks& timestamp);
  46   void OnLockButtonEvent(bool down, const base::TimeTicks& timestamp);
  47
  48  private:
  49   friend class test::PowerButtonControllerTest;
  50
  51   // Are the power or lock buttons currently held?
  52   bool power_button_down_;
  53   bool lock_button_down_;
  54
  55   // Is the screen currently turned off?
  56   bool screen_is_off_;
  57
  58   // Was a command-line switch set telling us that we're running on hardware
  59   // that misreports power button releases?
  60   bool has_legacy_power_button_;
  61
  62   SessionStateController* controller_; // Not owned.
  63
  64   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
  65 };
  66
  67 }  // namespace ash
  68
  69 #endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_