ash/wm/maximize_mode/maximize_mode_controller.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_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_CONTROLLER_H_
   6 #define ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_CONTROLLER_H_
   7
   8 #include "ash/accelerometer/accelerometer_observer.h"
   9 #include "ash/ash_export.h"
  10 #include "base/macros.h"
  11 #include "base/memory/scoped_ptr.h"
  12
  13 namespace ash {
  14
  15 class MaximizeModeEventBlocker;
  16
  17 // MaximizeModeController listens to accelerometer events and automatically
  18 // enters and exits maximize mode when the lid is opened beyond the triggering
  19 // angle and rotates the display to match the device when in maximize mode.
  20 class ASH_EXPORT MaximizeModeController : public AccelerometerObserver {
  21  public:
  22   MaximizeModeController();
  23   virtual ~MaximizeModeController();
  24
  25   // True if |rotation_lock_| has been set, and OnAccelerometerUpdated will not
  26   // change the display rotation.
  27   bool rotation_locked() {
  28     return rotation_locked_;
  29   }
  30
  31   // If |rotation_locked| future calls to OnAccelerometerUpdated will not
  32   // change the display rotation.
  33   void set_rotation_locked(bool rotation_locked) {
  34     rotation_locked_ = rotation_locked;
  35   }
  36
  37   // AccelerometerObserver:
  38   virtual void OnAccelerometerUpdated(const gfx::Vector3dF& base,
  39                                       const gfx::Vector3dF& lid) OVERRIDE;
  40
  41  private:
  42   // Detect hinge rotation from |base| and |lid| accelerometers and
  43   // automatically start / stop maximize mode.
  44   void HandleHingeRotation(const gfx::Vector3dF& base,
  45                            const gfx::Vector3dF& lid);
  46
  47   // Detect screen rotation from |lid| accelerometer and automatically rotate
  48   // screen.
  49   void HandleScreenRotation(const gfx::Vector3dF& lid);
  50
  51   // An event handler which traps mouse and keyboard events while maximize
  52   // mode is engaged.
  53   scoped_ptr<MaximizeModeEventBlocker> event_blocker_;
  54
  55   // When true calls to OnAccelerometerUpdated will not rotate the display.
  56   bool rotation_locked_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(MaximizeModeController);
  59 };
  60
  61 }  // namespace ash
  62
  63 #endif  // ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_CONTROLLER_H_