| EnterKeyAction | Provides attached properties for customizing the enter key |
| HandwritingInputPanel | Provides a handwriting panel add-on for the virtual keyboard UI |
| InputContext | 提供对输入上下文的访问 |
| InputEngine | 将用户输入映射到输入法 |
| InputMethod | Base type for creating input method in QML |
| InputPanel | Provides the virtual keyboard UI |
| KeyboardObserver | Acts as a hub for keyboard event notifications |
| SelectionListModel | Provides a data model for the selection lists |
| ShiftHandler | 管理 Shift 状态 |
| Trace | Data model for touch input data |
| VirtualKeyboard | Provides attached properties for customizing the virtual keyboard |
