ash/system/chromeos/rotation/tray_rotation_lock.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_SYSTEM_CHROMEOS_ROTATION_TRAY_ROTATION_LOCK_H_
   6 #define ASH_SYSTEM_CHROMEOS_ROTATION_TRAY_ROTATION_LOCK_H_
   7
   8 #include "ash/shell_observer.h"
   9 #include "ash/system/tray/tray_image_item.h"
  10 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
  11
  12 namespace ash {
  13
  14 namespace tray {
  15 class RotationLockDefaultView;
  16 }  // namespace tray
  17
  18 // TrayRotationLock is a provider of views for the SystemTray. Both a tray view
  19 // and a default view are provided. Each view indicates the current state of
  20 // the rotation lock for the display which it appears on. The default view can
  21 // be interacted with, it toggles the state of the rotation lock.
  22 // TrayRotationLock is only available on the primary display.
  23 class ASH_EXPORT TrayRotationLock : public TrayImageItem,
  24                                     public MaximizeModeController::Observer,
  25                                     public ShellObserver {
  26  public:
  27   explicit TrayRotationLock(SystemTray* system_tray);
  28   virtual ~TrayRotationLock();
  29
  30   // MaximizeModeController::Observer:
  31   virtual void OnRotationLockChanged(bool rotation_locked) override;
  32
  33   // SystemTrayItem:
  34   virtual views::View* CreateDefaultView(user::LoginStatus status) override;
  35
  36   // ShellObserver:
  37   virtual void OnMaximizeModeStarted() override;
  38   virtual void OnMaximizeModeEnded() override;
  39
  40  protected:
  41   // TrayImageItem:
  42   virtual bool GetInitialVisibility() override;
  43
  44  private:
  45   friend class TrayRotationLockTest;
  46
  47   // True if |on_primary_display_|, maximize mode is enabled, and rotation is
  48   // locked.
  49   bool ShouldBeVisible();
  50
  51   // True if this has been created by a SystemTray on the primary display.
  52   bool on_primary_display_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(TrayRotationLock);
  55 };
  56
  57 }  // namespace ash
  58
  59 #endif  // ASH_SYSTEM_CHROMEOS_ROTATION_TRAY_ROTATION_LOCK_H_