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 "ash/system/tray/system_tray_notifier.h"
  11 #include "ui/events/devices/input_device_event_observer.h"
  12
  13 namespace ash {
  14
  15 // This class observes input device changes for the virtual keyboard.
  16 class ASH_EXPORT VirtualKeyboardController
  17     : public ShellObserver,
  18       public ui::InputDeviceEventObserver {
  19  public:
  20   VirtualKeyboardController();
  21   ~VirtualKeyboardController() override;
  22
  23   // ShellObserver:
  24   // TODO(rsadam@): Remove when autovirtual keyboard flag is on by default.
  25   void OnMaximizeModeStarted() override;
  26   void OnMaximizeModeEnded() override;
  27
  28   // ui::InputDeviceObserver:
  29   void OnTouchscreenDeviceConfigurationChanged() override;
  30   void OnKeyboardDeviceConfigurationChanged() override;
  31
  32   // Toggles whether the presense of an external keyboard should be ignored
  33   // when determining whether or not to show the on-screen keyboard.
  34   void ToggleIgnoreExternalKeyboard();
  35
  36  private:
  37   // Updates the list of active input devices.
  38   void UpdateDevices();
  39
  40   // Updates the keyboard state.
  41   void UpdateKeyboardEnabled();
  42
  43   // Creates the keyboard if |enabled|, else destroys it.
  44   void SetKeyboardEnabled(bool enabled);
  45
  46   // True if an external keyboard is connected.
  47   bool has_external_keyboard_;
  48   // True if an internal keyboard is connected.
  49   bool has_internal_keyboard_;
  50   // True if a touchscreen is connected.
  51   bool has_touchscreen_;
  52   // True if the presense of an external keyboard should be ignored.
  53   bool ignore_external_keyboard_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(VirtualKeyboardController);
  56 };
  57
  58 }  // namespace ash
  59
  60 #endif  // ASH_VIRTUAL_KEYBOARD_CONTROLLER_H_