ash/virtual_keyboard_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_VIRTUAL_KEYBOARD_CONTROLLER_H_
   6 #define ASH_VIRTUAL_KEYBOARD_CONTROLLER_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/shell_observer.h"
  10 #include "ui/events/input_device_event_observer.h"
  11
  12 namespace ash {
  13
  14 // This class observes input device changes for the virtual keyboard.
  15 class ASH_EXPORT VirtualKeyboardController
  16     : public ShellObserver,
  17       public ui::InputDeviceEventObserver {
  18  public:
  19   VirtualKeyboardController();
  20   ~VirtualKeyboardController() override;
  21
  22   // ShellObserver:
  23   virtual void OnMaximizeModeStarted() override;
  24   virtual void OnMaximizeModeEnded() override;
  25
  26   // ui::InputDeviceObserver:
  27   // TODO(rsadam@): Remove when autovirtual keyboard flag is on by default.
  28   virtual void OnTouchscreenDeviceConfigurationChanged() override;
  29   virtual void OnKeyboardDeviceConfigurationChanged() override;
  30
  31  private:
  32   // Updates the list of active input devices.
  33   void UpdateDevices();
  34
  35   // Updates the keyboard state.
  36   void UpdateKeyboardEnabled();
  37
  38   // Creates the keyboard if |enabled|, else destroys it.
  39   void SetKeyboardEnabled(bool enabled);
  40
  41   // True if an external keyboard is connected.
  42   bool has_external_keyboard_;
  43   // True if an internal keyboard is connected.
  44   bool has_internal_keyboard_;
  45   // True if a touchscreen is connected.
  46   bool has_touchscreen_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(VirtualKeyboardController);
  49 };
  50
  51 }  // namespace ash
  52
  53 #endif  // ASH_VIRTUAL_KEYBOARD_CONTROLLER_H_