| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_BASE_IME_INPUT_METHOD_KEYBOARD_CONTROLLER_H_ |
| #define UI_BASE_IME_INPUT_METHOD_KEYBOARD_CONTROLLER_H_ |
| |
| #include "ui/base/ime/ui_base_ime_export.h" |
| |
| namespace ui { |
| |
| class InputMethodKeyboardControllerObserver; |
| |
| // This class provides functionality to display the on screen keyboard and |
| // add observers to observe changes in it. |
| class UI_BASE_IME_EXPORT InputMethodKeyboardController { |
| public: |
| virtual ~InputMethodKeyboardController() = default; |
| |
| // Attempt to display the keyboard. |
| virtual bool DisplayVirtualKeyboard() = 0; |
| |
| // Attempt to dismiss the keyboard |
| virtual void DismissVirtualKeyboard() = 0; |
| |
| // Adds a registered observer. |
| virtual void AddObserver(InputMethodKeyboardControllerObserver* observer) = 0; |
| |
| // Removes a registered observer. |
| virtual void RemoveObserver( |
| InputMethodKeyboardControllerObserver* observer) = 0; |
| |
| // Returns true if the virtual keyboard is currently visible. |
| virtual bool IsKeyboardVisible() = 0; |
| |
| protected: |
| InputMethodKeyboardController() = default; |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_BASE_IME_INPUT_METHOD_KEYBOARD_CONTROLLER_H_ |