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      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 LockStateController;
     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(LockStateController* 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   LockStateController* controller_; // Not owned.
     63 
     64   DISALLOW_COPY_AND_ASSIGN(PowerButtonController);
     65 };
     66 
     67 }  // namespace ash
     68 
     69 #endif  // ASH_WM_POWER_BUTTON_CONTROLLER_H_
     70