| QAccel | 處理鍵盤加速器和快捷鍵 | Handles keyboard accelerator and shortcut keys |
| QAccessible | Enums與可達性的靜態函數 | Enums and static functions relating to accessibility |
| QAccessibleInterface | 定義一個接口，該接口公開有關可訪問對象的信息。 | Defines an interface that exposes information about accessible objects |
| QAccessibleObject | 為QObjor實現QAccess接口的部分 | Implements parts of the QAccessibleInterface for QObjects |
| QAction | 可以在菜單和工具欄中顯示的抽象用戶界面動作 | Abstract user interface action that can appear both in menus and tool bars |
| QActionGroup | 集體行動 | Groups actions together |
| QApplication | 管理GUI應用程序的控制流程和主要設置 | Manages the GUI application's control flow and main settings |
| QAsciiCache | 基于char *鍵提供緩存的模板類 | Template class that provides a cache based on char* keys |
| QAsciiCacheIterator | Qasciicache Collections Iterator | Iterator for QAsciiCache collections |
| QAsciiDict | 基于char *鍵提供字典的模板類 | Template class that provides a dictionary based on char* keys |
| QAsciiDictIterator | QasiIDICT集合的迭代器 | Iterator for QAsciiDict collections |
| QBitArray | 位數組 | Array of bits |
| QBitVal | 內部類，與QBITAL數組一起使用 | Internal class, used with QBitArray |
| QBitmap | 單色（1位深度）像素映射 | Monochrome (1-bit depth) pixmaps |
| QBoxLayout | 水平或垂直排列子控件 | Lines up child widgets horizontally or vertically |
| QBrush | 定義Qu畫師繪制的形狀的填充模式。 | Defines the fill pattern of shapes drawn by a QPainter |
| QBuffer | 在QByTurrar上操作的I/O設備 | I/O device that operates on a QByteArray |
| QButton | 按鈕小部件的抽象基類，提供按鈕常用的功能 | The abstract base class of button widgets, providing functionality common to buttons |
| QButtonGroup | Organizes QButton widgets in a group | Organizes QButton widgets in a group |
| QByteArray | 字節數組 | Array of bytes |
| QCDEStyle | 外觀與感覺 | CDE look and feel |
| QCString | 經典C零結尾字符數組（CHAR*）的抽象 | Abstraction of the classic C zero-terminated char array (char *) |
| QCache | 基于QSql鍵提供緩存的模板類 | Template class that provides a cache based on QString keys |
| QCacheIterator | QCHASE收藏品 | Iterator for QCache collections |
| QCanvas | 可以包含QCANVAISTION對象的2D區域 | 2D area that can contain QCanvasItem objects |
| QCanvasEllipse | 在QCANVAS上的橢圓或橢圓段 | Ellipse or ellipse segment on a QCanvas |
| QCanvasItem | QCANVAS上的抽象圖形對象 | Abstract graphic object on a QCanvas |
| QCanvasItemList | QCANASAS項目列表 | List of QCanvasItems |
| QCanvasLine | 在QCANVAS上的行 | Line on a QCanvas |
| QCanvasPixmap | QCANVASPITS的像素映射 | Pixmaps for QCanvasSprites |
| QCanvasPixmapArray | QCANVISPIX映射數組 | Array of QCanvasPixmaps |
| QCanvasPolygon | 有QCANVAS的多邊形 | Polygon on a QCanvas |
| QCanvasPolygonalItem | QCANVAS多邊形 | Polygonal canvas item on a QCanvas |
| QCanvasRectangle | 有QCANVAS的矩形 | Rectangle on a QCanvas |
| QCanvasSpline | 在QCANVAS上的多個Bezier樣條函數 | Multi-bezier splines on a QCanvas |
| QCanvasSprite | 活躍的歌唱 | Animated canvas item on a QCanvas |
| QCanvasText | QCANVAS上的文本對象 | Text object on a QCanvas |
| QCanvasView | 關于QCANVAS的屏幕視圖 | On-screen view of a QCanvas |
| QChar | 輕量級Unicode字符 | Lightweight Unicode character |
| QCharRef | q字符串的幫助類 | Helper class for QString |
| QCheckBox | Checkbox with a text label | Checkbox with a text label |
| QCheckListItem | 可檢查列表視圖項 | Checkable list view items |
| QCheckTableItem | Qtables中的檢查 | Checkboxes in QTables |
| QChildEvent | 子對象事件的事件參數 | Event parameters for child object events |
| QClipboard | 訪問窗口系統剪貼板 | Access to the window system clipboard |
| QCloseEvent | 描述關閉事件的參數 | Parameters that describe a close event |
| QColor | 基于RGB或HSV值的顏色 | Colors based on RGB or HSV values |
| QColorDialog | 指定顏色的對話窗口小部件 | Dialog widget for specifying colors |
| QColorDrag | 拖拽顏色轉移對象 | Drag and drop object for transferring colors |
| QColorGroup | 小部件顏色組 | Group of widget colors |
| QComboBox | 組合按鈕和彈出列表 | Combined button and popup list |
| QComboTableItem | QTables使用組合框的方法 | Means of using comboboxes in QTables |
| QCommonStyle | 封裝GUI的常見外觀和感覺 | Encapsulates the common Look and Feel of a GUI |
| QConstString | 使用常數Unicode數據的字符串對象 | String objects using constant Unicode data |
| QContextMenuEvent | 描述上下文菜單事件的參數 | Parameters that describe a context menu event |
| QCopChannel | 幾個客戶之間的通信能力 | Communication capabilities between several clients |
| QCursor | 任意形狀的鼠標光標 | Mouse cursor with an arbitrary shape |
| QCustomEvent | 支持自定義事件 | Support for custom events |
| QCustomMenuItem | 在彈出菜單中自定義自定義菜單項的基類 | Abstract base class for custom menu items in popup menus |
| QDataBrowser | 數據錄入窗體的數據操作和導航 | Data manipulation and navigation for data entry forms |
| QDataStream | 二進制數據到Qoo裝置的串行化 | Serialization of binary data to a QIODevice |
| QDataTable | 支持瀏覽和編輯的靈活SQL表小部件 | Flexible SQL table widget that supports browsing and editing |
| QDataView | 只讀SQL表單 | Read-only SQL forms |
| QDate | 日期函數 | Date functions |
| QDateEdit | 日期編輯器 | Date editor |
| QDateTime | 日期和時間函數 | Date and time functions |
| QDateTimeEdit | 將QDATEEDIT和QTimeEngEnter控件合并為編輯日期的單個窗口小部件 | Combines a QDateEdit and QTimeEdit widget into a single widget for editing datetimes |
| QDesktopWidget | 多頭系統屏幕信息的獲取 | Access to screen information on multi-head systems |
| QDial | 圓形范圍控制（如速度計或電位器） | Rounded range control (like a speedometer or potentiometer) |
| QDialog | 對話框窗口的基類 | The base class of dialog windows |
| QDict | 基于QStand鍵提供字典的模板類 | Template class that provides a dictionary based on QString keys |
| QDictIterator | qdit集合的迭代器 | Iterator for QDict collections |
| QDir | 以平臺無關的方式訪問目錄結構及其內容 | Access to directory structures and their contents in a platform-independent way |
| QDirectPainter | 直接訪問視頻硬件 | Direct access to the video hardware |
| QDns | 異步DNS查找 | Asynchronous DNS lookups |
| QDockArea | 管理和配置QDOKWindows | Manages and lays out QDockWindows |
| QDockWindow | 可以在QDOCKEATE中停靠或作為桌面上的頂級窗口浮動的小部件 | Widget which can be docked inside a QDockArea or floated as a top level window on the desktop |
| QDomAttr | 表示QDOME元素的一個屬性。 | Represents one attribute of a QDomElement |
| QDomCDATASection | 表示XML cDATA節。 | Represents an XML CDATA section |
| QDomCharacterData | 表示DOM中的通用字符串。 | Represents a generic string in the DOM |
| QDomComment | 表示XML注釋 | Represents an XML comment |
| QDomDocument | 表示XML文檔 | Represents an XML document |
| QDomDocumentFragment | QDONTUNE的樹，通常不是完整的QDOM文檔 | Tree of QDomNodes which is not usually a complete QDomDocument |
| QDomDocumentType | 文檔樹中DTD的表示 | The representation of the DTD in the document tree |
| QDomElement | 表示DOM樹中的一個元素 | Represents one element in the DOM tree |
| QDomEntity | 表示XML實體 | Represents an XML entity |
| QDomEntityReference | 表示XML實體引用。 | Represents an XML entity reference |
| QDomImplementation | DOM實現的特征信息 | Information about the features of the DOM implementation |
| QDomNamedNodeMap | 可以通過名稱訪問的節點的集合 | Collection of nodes that can be accessed by name |
| QDomNode | DOM樹中所有節點的基類 | The base class for all the nodes in a DOM tree |
| QDomNodeList | QDomNode對象列表 | List of QDomNode objects |
| QDomNotation | 表示XML表示法。 | Represents an XML notation |
| QDomProcessingInstruction | 表示XML處理指令。 | Represents an XML processing instruction |
| QDomText | 表示解析的XML文檔中的文本數據。 | Represents text data in the parsed XML document |
| QDoubleValidator | 浮點數的范圍檢驗 | Range checking of floating-point numbers |
| QDragEnterEvent | 事件，當拖放首先拖動到控件上時，該事件被發送到控件。 | Event which is sent to the widget when a drag and drop first drags onto the widget |
| QDragLeaveEvent | 當拖放離開控件時發送到控件的事件 | Event which is sent to the widget when a drag and drop leaves the widget |
| QDragMoveEvent | 在拖放過程中發送的事件。 | Event which is sent while a drag and drop is in progress |
| QDragObject | 封裝基于MIME的數據傳輸 | Encapsulates MIME-based data transfer |
| QDropEvent | 當拖放完成時發送的事件 | Event which is sent when a drag and drop is completed |
| QEditorFactory | 用于創建qFATA數據類型的編輯器小部件 | Used to create editor widgets for QVariant data types |
| QErrorMessage | 錯誤信息顯示對話框 | Error message display dialog |
| QEucJpCodec | EUC-JP字符集的轉換 | Conversion to and from EUC-JP character sets |
| QEucKrCodec | EK-KR字符集的轉換 | Conversion to and from EUC-KR character sets |
| QEvent | 所有事件類的基類。事件對象包含事件參數 | The base class of all event classes. Event objects contain event parameters |
| QFile | 對文件進行操作的I/O設備 | I/O device that operates on files |
| QFileDialog | 允許用戶選擇文件或目錄的對話框 | Dialogs that allow users to select files or directories |
| QFileIconProvider | 使用QFielDeCalax的圖標 | Icons for QFileDialog to use |
| QFileInfo | 系統無關文件信息 | System-independent file information |
| QFilePreview | QFileDialog中的文件預覽 | File previewing in QFileDialog |
| QFocusData | 維護焦點鏈中的小部件列表 | Maintains the list of widgets in the focus chain |
| QFocusEvent | 控件焦點事件的事件參數 | Event parameters for widget focus events |
| QFont | 用于繪制文本的字體 | Font used for drawing text |
| QFontDatabase | 有關底層窗口系統中可用字體的信息 | Information about the fonts available in the underlying window system |
| QFontDialog | 用于選擇字體的對話框小部件 | Dialog widget for selecting a font |
| QFontInfo | 字體的一般信息 | General information about fonts |
| QFontManager | 實現Qt/Engt中的字體管理 | Implements font management in Qt/Embedded |
| QFontMetrics | 字體度量信息 | Font metrics information |
| QFrame | 可以有框架的小部件的基類 | The base class of widgets that can have a frame |
| QFtp | FTP協議的實現 | Implementation of the FTP protocol |
| QGL | Qt OpenGL模塊中雜項標識符的命名空間 | Namespace for miscellaneous identifiers in the Qt OpenGL module |
| QGLColormap | 用于將自定義顏色映射安裝到QGLIDWET中 | Used for installing custom colormaps into QGLWidgets |
| QGLContext | 封裝OpenGL渲染上下文 | Encapsulates an OpenGL rendering context |
| QGLFormat | OpenGL渲染上下文的顯示格式 | The display format of an OpenGL rendering context |
| QGLWidget | Widget for rendering OpenGL graphics | Widget for rendering OpenGL graphics |
| QGLayoutIterator | 抽象的內部布局迭代器基類 | Abstract base class of internal layout iterators |
| QGb18030Codec | 中國GB18030/GBK/GB23編碼轉換 | Conversion to and from the Chinese GB18030/GBK/GB2312 encoding |
| QGbkCodec | 中文GBK編碼的轉換與轉換 | Conversion to and from the Chinese GBK encoding |
| QGrid | 兒童簡易幾何管理 | Simple geometry management of its children |
| QGridLayout | 在網格中設置小部件 | Lays out widgets in a grid |
| QGridView | 固定尺寸網格抽象庫 | Abstract base for fixed-size grids |
| QGroupBox | 帶標題的群箱框架 | Group box frame with a title |
| QGuardedPtr | 為QObjs提供保護指針的模板類 | Template class that provides guarded pointers to QObjects |
| QHBox | 子控件的水平幾何管理 | Horizontal geometry management for its child widgets |
| QHBoxLayout | 水平排列小部件 | Lines up widgets horizontally |
| QHButtonGroup | 在一個水平行的組中組織QButt小部件 | Organizes QButton widgets in a group with one horizontal row |
| QHGroupBox | 在具有一個水平行的組中組織小部件 | Organizes widgets in a group with one horizontal row |
| QHeader | 標題行或列，例如表和列表視圖 | Header row or column, e.g. for tables and listviews |
| QHebrewCodec | 視覺有序希伯來語的轉換 | Conversion to and from visually ordered Hebrew |
| QHideEvent | 事件是在小部件被隱藏之后發送的 | Event which is sent after a widget is hidden |
| QHostAddress | IP地址 | IP address |
| QHttp | 互聯網協議的執行 | Implementation of the HTTP protocol |
| QIMEvent | 輸入法事件的參數 | Parameters for input method events |
| QIODevice | I/O設備的基類 | The base class of I/O devices |
| QIconDrag | 支持QCONVIEW中的拖放操作 | Supports drag and drop operations within a QIconView |
| QIconDragItem | 封裝阻力項目 | Encapsulates a drag item |
| QIconSet | 不同風格和尺寸的圖標集 | Set of icons with different styles and sizes |
| QIconView | 帶可移動標記圖標的區域 | Area with movable labelled icons |
| QIconViewItem | 單曲的一個主題 | Single item in a QIconView |
| QImage | 與像素數據直接存取的獨立于硬件的PixMax表示 | Hardware-independent pixmap representation with direct access to the pixel data |
| QImageConsumer | QIMADEDECODER使用的抽象 | Abstraction used by QImageDecoder |
| QImageDecoder | 用于所有支持圖像格式的增量圖像解碼器 | Incremental image decoder for all supported image formats |
| QImageDrag | 拖動圖像傳輸對象 | Drag and drop object for transferring images |
| QImageFormat | 用于特定圖像格式的增量圖像解碼器 | Incremental image decoder for a specific image format |
| QImageFormatPlugin | 自定義圖像格式插件的抽象基礎 | Abstract base for custom image format plugins |
| QImageFormatType | 制作QiFig格式對象的工廠 | Factory that makes QImageFormat objects |
| QImageIO | 加載和保存圖像的參數 | Parameters for loading and saving images |
| QInputDialog | 簡單方便對話框從用戶獲取單個值 | Simple convenience dialog to get a single value from the user |
| QIntCache | 基于長鍵提供緩存的模板類 | Template class that provides a cache based on long keys |
| QIntCacheIterator | 秦嶺藏品 | Iterator for QIntCache collections |
| QIntDict | 基于長鍵提供字典的模板類 | Template class that provides a dictionary based on long keys |
| QIntDictIterator | 琴蒂系列 | Iterator for QIntDict collections |
| QIntValidator | 確保字符串在指定范圍內包含有效整數的驗證器 | Validator which ensures that a string contains a valid integer within a specified range |
| QJisCodec | JIS字符集的轉換與轉換 | Conversion to and from JIS character sets |
| QKeyEvent | 描述關鍵事件 | Describes a key event |
| QKeySequence | 封裝加速器所使用的密鑰序列 | Encapsulates a key sequence as used by accelerators |
| QLCDNumber | 顯示一個帶有LCD數字的數字 | Displays a number with LCD-like digits |
| QLabel | 文字或圖像顯示 | Text or image display |
| QLayout | 幾何管理器的基類 | The base class of geometry managers |
| QLayoutItem | 一個Q布局的抽象項操作 | Abstract item that a QLayout manipulates |
| QLayoutIterator | Qlayoutitem之上的 | Iterators over QLayoutItem |
| QLibrary | 處理共享庫的包裝器 | Wrapper for handling shared libraries |
| QLineEdit | One-line text editor | One-line text editor |
| QListBox | 可選擇只讀項目列表 | List of selectable, read-only items |
| QListBoxItem | 所有列表框項的基類 | The base class of all list box items |
| QListBoxPixmap | 用PixMax和可選文本列出框項 | List box items with a pixmap and optional text |
| QListBoxText | 列出顯示文本的框項 | List box items that display text |
| QListView | 實現列表/樹視圖 | Implements a list/tree view |
| QListViewItem | 實現列表視圖項 | Implements a list view item |
| QListViewItemIterator | qListVIEW項集合的迭代器 | Iterator for collections of QListViewItems |
| QLocalFs | 在本地文件系統上工作的QNETWork協議的實現 | Implementation of a QNetworkProtocol that works on the local file system |
| QLock | 系統V共享信號量的包裝器 | Wrapper for a System V shared semaphore |
| QMainWindow | 主應用程序窗口，帶有菜單欄、停靠窗口（例如工具欄）和狀態欄 | Main application window, with a menu bar, dock windows (e.g. for toolbars), and a status bar |
| QMap | 基于值的提供字典的模板類 | Value-based template class that provides a dictionary |
| QMapConstIterator | QMAP迭代器 | Iterator for QMap |
| QMapIterator | QMAP迭代器 | Iterator for QMap |
| QMemArray | 提供簡單類型數組的模板類 | Template class that provides arrays of simple types |
| QMenuBar | 水平菜單欄 | Horizontal menu bar |
| QMenuData | QueNuBar和QPopupMenu的基類 | Base class for QMenuBar and QPopupMenu |
| QMessageBox | 模態對話框與短消息，圖標，和一些按鈕 | Modal dialog with a short message, an icon, and some buttons |
| QMetaObject | 關于QT對象的元信息 | Meta information about Qt objects |
| QMetaProperty | Stores meta data about a property | Stores meta data about a property |
| QMimeSource | 提供某種MIME類型的格式化數據的對象的抽象 | Abstraction of objects which provide formatted data of a certain MIME type |
| QMimeSourceFactory | MIME類型數據的可擴展提供程序 | Extensible provider of mime-typed data |
| QMotifPlusStyle | 更復雜的主題外觀和感覺 | More sophisticated Motif-ish look and feel |
| QMotifStyle | 主題外觀 | Motif look and feel |
| QMouseEvent | 描述鼠標事件的參數 | Parameters that describe a mouse event |
| QMoveEvent | 移動事件的事件參數 | Event parameters for move events |
| QMovie | 動畫或圖像的增量加載，隨著其進程的信號傳遞 | Incremental loading of animations or images, signalling as it progresses |
| QMutex | 線程間的訪問序列化 | Access serialization between threads |
| QNPInstance | QObjt是一個Web瀏覽器插件 | QObject that is a Web-browser plugin |
| QNPStream | 瀏覽器提供給QNPNase實例的數據流 | Stream of data provided to a QNPInstance by the browser |
| QNPWidget | QWIDGET，這是一個Web瀏覽器插件窗口 | QWidget that is a Web-browser plugin window |
| QNPlugin | 插件中心工廠 | The plugin central factory |
| QNetworkOperation | 網絡協議的通用操作 | Common operations for network protocols |
| QNetworkProtocol | 網絡協議通用API | Common API for network protocols |
| QObject | 所有QT對象的基類 | The base class of all Qt objects |
| QObjectCleanupHandler | 監視多個QObjices的生存期 | Watches the lifetime of multiple QObjects |
| QObjectList | Q對象的QPTRLIST | QPtrList of QObjects |
| QObjectListIt | qObjtRealts的迭代器 | Iterator for QObjectLists |
| QPNGImagePacker | 創建良好壓縮的PNG動畫 | Creates well-compressed PNG animations |
| QPaintDevice | 可以畫的對象的基類 | The base class of objects that can be painted |
| QPaintDeviceMetrics | 關于油漆裝置的信息 | Information about a paint device |
| QPaintEvent | 繪制事件的事件參數 | Event parameters for paint events |
| QPainter | 低級繪畫嗎？ | Does low-level painting e.g. on widgets |
| QPair | 基于值的模板類，它提供一對元素 | Value-based template class that provides a pair of elements |
| QPalette | 每個小部件狀態的顏色組 | Color groups for each widget state |
| QPen | 定義q畫家如何繪制線條和形狀輪廓 | Defines how a QPainter should draw lines and outlines of shapes |
| QPicture | 記錄和重放QPrice命令的繪圖設備 | Paint device that records and replays QPainter commands |
| QPixmap | 基于屏幕的基于像素的油漆裝置 | Off-screen, pixel-based paint device |
| QPixmapCache | 應用全局緩存的PIXMAP | Application-global cache for pixmaps |
| QPlatinumStyle | MAC /鉑金外觀 | Mac/Platinum look and feel |
| QPoint | 定義平面中的一個點 | Defines a point in the plane |
| QPointArray | 點數組 | Array of points |
| QPopupMenu | 彈出菜單控件 | Popup menu widget |
| QPrinter | 在打印機上噴漆的油漆裝置 | Paint device that paints on a printer |
| QProcess | 用于啟動外部程序并與它們通信 | Used to start external programs and to communicate with them |
| QProgressBar | 水平進度條 | Horizontal progress bar |
| QProgressDialog | 慢操作進展反饋 | Feedback on the progress of a slow operation |
| QPtrCollection | 基于指針的QT集合的基類 | The base class of most pointer-based Qt collections |
| QPtrDict | 基于空隙*鍵提供字典的模板類 | Template class that provides a dictionary based on void* keys |
| QPtrDictIterator | Iterator for QPTRDICT collections | Iterator for QPtrDict collections |
| QPtrList | 提供雙鏈表的模板類 | Template class that provides doubly-linked lists |
| QPtrListIterator | QPTRIST集合的迭代器 | Iterator for QPtrList collections |
| QPtrQueue | 提供隊列的模板類 | Template class that provides a queue |
| QPtrStack | 提供堆棧的模板類 | Template class that provides a stack |
| QPtrVector | 提供向量（數組）的模板集合類 | Template collection class that provides a vector (array) |
| QPushButton | 命令按鈕 | Command button |
| QRadioButton | 帶有文本或PIMAP標簽的單選按鈕 | Radio button with a text or pixmap label |
| QRangeControl | 范圍內的整數值 | Integer value within a range |
| QRect | 在平面中定義矩形 | Defines a rectangle in the plane |
| QRegExp | 正則表達式的模式匹配 | Pattern matching using regular expressions |
| QRegExpValidator | 用于檢查字符串正則表達式 | Used to check a string against aregular expression |
| QRegion | 畫家的剪輯區域 | Clip region for a painter |
| QResizeEvent | 調整大小事件的事件參數 | Event parameters for resize events |
| QSGIStyle | SGI/IIX外觀與感覺 | SGI/Irix look and feel |
| QScreen | 它的后代管理框架緩沖區和調色板。 | And its descendants manage the framebuffer and palette |
| QScrollBar | 垂直或水平滾動條 | Vertical or horizontal scroll bar |
| QScrollView | 按需滾動條滾動區域 | Scrolling area with on-demand scroll bars |
| QSemaphore | 穩健整數信號量 | Robust integer semaphore |
| QServerSocket | 基于TCP的服務器 | TCP-based server |
| QSessionManager | 訪問會話管理器 | Access to the session manager |
| QSettings | 持久平臺無關應用程序設置 | Persistent platform-independent application settings |
| QShowEvent | 顯示小部件時發送的事件 | Event which is sent when a widget is shown |
| QSignal | 可以用于為不繼承QObjt的類發送信號。 | Can be used to send signals for classes that don't inherit QObject |
| QSignalMapper | Bundles signals from identifiable senders | Bundles signals from identifiable senders |
| QSimpleRichText | 可顯示的小文本 | Small displayable piece of rich text |
| QSize | 定義二維對象的大小 | Defines the size of a two-dimensional object |
| QSizeGrip | 用于調整頂層窗口大小的角柄 | Corner-grip for resizing a top-level window |
| QSizePolicy | 描述水平和垂直調整大小策略的布局屬性 | Layout attribute describing horizontal and vertical resizing policy |
| QSjisCodec | 轉換到JIS的轉換 | Conversion to and from Shift-JIS |
| QSlider | 垂直或水平滑塊 | Vertical or horizontal slider |
| QSocket | 緩沖TCP連接 | Buffered TCP connection |
| QSocketDevice | 與平臺無關的低級套接字API | Platform-independent low-level socket API |
| QSocketNotifier | 支持套接字回調 | Support for socket callbacks |
| QSound | 平臺音頻設備的接入 | Access to the platform audio facilities |
| QSpacerItem | 布局中的空白 | Blank space in a layout |
| QSpinBox | Spin box widget (spin button) | Spin box widget (spin button) |
| QSplitter | 實現拆分器控件 | Implements a splitter widget |
| QSql | 需要全局性的QT-SQL標識符的命名空間 | Namespace for Qt SQL identifiers that need to be global-like |
| QSqlCursor | 瀏覽和編輯SQL表和視圖 | Browsing and editing of SQL tables and views |
| QSqlDatabase | 用于創建SQL數據庫連接并提供事務處理 | Used to create SQL database connections and provide transaction handling |
| QSqlDriver | 用于訪問SQL數據庫的抽象基類 | Abstract base class for accessing SQL databases |
| QSqlDriverPlugin | 自定義QSql驅動程序插件的抽象基礎 | Abstract base for custom QSqlDriver plugins |
| QSqlEditorFactory | 用于創建QDATABLE和QSqlForm所使用的編輯器 | Used to create the editors used by QDataTable and QSqlForm |
| QSqlError | SQL數據庫錯誤信息 | SQL database error information |
| QSqlField | 操作SQL數據庫表和視圖中的字段 | Manipulates the fields in SQL database tables and views |
| QSqlFieldInfo | 存儲與SQL字段相關聯的元數據 | Stores meta data associated with a SQL field |
| QSqlForm | 創建和管理綁定到SQL數據庫的數據輸入窗體 | Creates and manages data entry forms tied to SQL databases |
| QSqlIndex | 操作和描述QSql游標和QSqlDatabase索引的函數 | Functions to manipulate and describe QSqlCursor and QSqlDatabase indexes |
| QSqlPropertyMap | 用于將窗口小部件映射到SQL字段 | Used to map widgets to SQL fields |
| QSqlQuery | 執行和操作SQL語句的方法 | Means of executing and manipulating SQL statements |
| QSqlRecord | 封裝數據庫記錄，即一組數據庫字段。 | Encapsulates a database record, i.e. a set of database fields |
| QSqlRecordInfo | 封裝一組數據庫字段元數據 | Encapsulates a set of database field meta data |
| QSqlResult | 從SQL數據庫訪問數據的抽象接口 | Abstract interface for accessing data from SQL databases |
| QStatusBar | 適用于顯示狀態信息的橫桿 | Horizontal bar suitable for presenting status information |
| QStoredDrag | 任意MIME數據的簡單存儲值拖動對象 | Simple stored-value drag object for arbitrary MIME data |
| QStrIList | 與不區分大小寫比較的CHAR*雙鏈表 | Doubly-linked list of char* with case-insensitive comparison |
| QStrList | 字符的雙鏈表 | Doubly-linked list of char* |
| QStrListIterator | QSTRIST和QSTRILIST類的迭代器 | Iterator for the QStrList and QStrIList classes |
| QString | Unicode文本和經典C空終止字符數組的抽象 | Abstraction of Unicode text and the classic C null-terminated char array |
| QStringList | 字符串表 | List of strings |
| QStyle | GUI的外觀和感覺 | The look and feel of a GUI |
| QStyleFactory | 創建qStar對象 | Creates QStyle objects |
| QStyleOption | qStle函數的可選參數 | Optional parameters for QStyle functions |
| QStylePlugin | 自定義QSLUE插件抽象庫 | Abstract base for custom QStyle plugins |
| QStyleSheet | 用于豐富文本渲染的樣式集合和標簽生成器 | Collection of styles for rich text rendering and a generator of tags |
| QStyleSheetItem | 一組文本樣式的封裝 | Encapsulation of a set of text styles |
| QTab | QTabar中的結構 | The structures in a QTabBar |
| QTabBar | 標簽欄，例如在標簽對話框中使用 | Tab bar, e.g. for use in tabbed dialogs |
| QTabDialog | 選項卡小部件的堆棧 | Stack of tabbed widgets |
| QTabWidget | 選項卡小部件的堆棧 | Stack of tabbed widgets |
| QTable | 靈活可編輯表控件 | Flexible editable table widget |
| QTableItem | QTABLE細胞的細胞含量 | The cell content for QTable cells |
| QTableSelection | 在QTABLE中訪問選定區域 | Access to a selected area in a QTable |
| QTabletEvent | 描述平板事件的參數 | Parameters that describe a Tablet event |
| QTextBrowser | 具有超文本導航的富文本瀏覽器 | Rich text browser with hypertext navigation |
| QTextCodec | 文本編碼之間的轉換 | Conversion between text encodings |
| QTextCodecPlugin | 自定義QTraceCDEC插件抽象庫 | Abstract base for custom QTextCodec plugins |
| QTextDecoder | 狀態譯碼器 | State-based decoder |
| QTextDrag | 拖動對象以傳遞普通和Unicode文本 | Drag and drop object for transferring plain and Unicode text |
| QTextEdit | 強大的單頁富文本編輯器 | Powerful single-page rich text editor |
| QTextEncoder | 狀態編碼器 | State-based encoder |
| QTextIStream | 輸入流的便利類 | Convenience class for input streams |
| QTextOStream | 輸出流的便利類 | Convenience class for output streams |
| QTextStream | 使用Qoo裝置閱讀和書寫文本的基本功能 | Basic functions for reading and writing text using a QIODevice |
| QThread | 獨立于平臺的線程 | Platform-independent threads |
| QTime | 時鐘時間函數 | Clock time functions |
| QTimeEdit | 時間編輯器 | Time editor |
| QTimer | 計時器信號和單炮計時器 | Timer signals and single-shot timers |
| QTimerEvent | 描述定時器事件的參數 | Parameters that describe a timer event |
| QToolBar | 包含工具按鈕等小部件的活動面板 | Movable panel containing widgets such as tool buttons |
| QToolButton | 命令或選項的快速訪問按鈕，通常用于QTooBar中 | Quick-access button to commands or options, usually used inside a QToolBar |
| QToolTip | 小工具的任何小部件或矩形部分的工具提示（氣球幫助） | Tool tips (balloon help) for any widget or rectangular part of a widget |
| QToolTipGroup | 將工具提示收集到相關組中 | Collects tool tips into related groups |
| QTranslator | 國際化支持文本輸出 | Internationalizationsupport for text output |
| QTranslatorMessage | 翻譯器消息及其性質 | Translator message and its properties |
| QTsciiCodec | TAMIL TSCII編碼的轉換與轉換 | Conversion to and from the Tamil TSCII encoding |
| QUriDrag | 拖動對象以獲取URI引用的列表 | Drag object for a list of URI references |
| QUrl | URL解析器，簡化了URL的工作 | URL parser and simplifies working with URLs |
| QUrlInfo | Stores information about URLs | Stores information about URLs |
| QUrlOperator | URL的通用操作 | Common operations on URLs |
| QVBox | 子控件的垂直幾何管理 | Vertical geometry management of its child widgets |
| QVBoxLayout | 垂直排列小部件 | Lines up widgets vertically |
| QVButtonGroup | 在垂直列中組織QButt小部件 | Organizes QButton widgets in a vertical column |
| QVGroupBox | 在垂直列中組織一組小部件 | Organizes a group of widgets in a vertical column |
| QValidator | 輸入文本的驗證 | Validation of input text |
| QValueList | 提供雙鏈表的基于值的模板類 | Value-based template class that provides doubly linked lists |
| QValueListConstIterator | QValeleListconst迭代器 | Const iterator for QValueList |
| QValueListIterator | qValeleListIt的迭代器 | Iterator for QValueList |
| QValueStack | 提供堆棧的基于值的模板類 | Value-based template class that provides a stack |
| QValueVector | 提供動態數組的基于值的模板類 | Value-based template class that provides a dynamic array |
| QVariant | 就像最常見的QT數據類型的聯合 | Acts like a union for the most common Qt data types |
| QWMatrix | 坐標系的二維變換 | 2D transformations of a coordinate system |
| QWSDecoration | 允許定制Qt/Ent+窗口管理器的外觀 | Allows the appearance of the Qt/Embedded Window Manager to be customized |
| QWSKeyboardHandler | 實現Qt/Engt的鍵盤驅動程序/處理器 | Implements the keyboard driver/handler for Qt/Embedded |
| QWSMouseHandler | QT/嵌入式鼠標驅動程序/處理程序 | Mouse driver/handler for Qt/Embedded |
| QWSServer | Qt/Engin中的服務器特定功能 | Server-specific functionality in Qt/Embedded |
| QWSWindow | Qt/Engin中的服務器特定功能 | Server-specific functionality in Qt/Embedded |
| QWaitCondition | 允許等待/喚醒線程間的條件 | Allows waiting/waking for conditions between threads |
| QWhatsThis | 簡單描述任何小部件，即回答“這是什么？” | Simple description of any widget, i.e. answering the question "What's this?" |
| QWheelEvent | 描述車輪事件的參數 | Parameters that describe a wheel event |
| QWidget | 所有用戶界面對象的基類 | The base class of all user interface objects |
| QWidgetFactory | 從Qt設計器.UI文件中動態創建小部件 | For the dynamic creation of widgets from Qt Designer .ui files |
| QWidgetItem | 表示小部件的布局項目 | Layout item that represents a widget |
| QWidgetPlugin | 自定義QWIDGET插件的抽象基礎 | Abstract base for custom QWidget plugins |
| QWidgetStack | 只顯示頂部控件的小部件堆棧是用戶可見的 | Stack of widgets of which only the top widget is user-visible |
| QWindowsMime | 將標準MIME打開到窗口剪貼板格式 | Maps open-standard MIME to Window Clipboard formats |
| QWindowsStyle | 微軟視窗 | Microsoft Windows-like look and feel |
| QWizard | 向導對話框框架 | Framework for wizard dialogs |
| QWorkspace | Workspace window that can contain decorated windows, e.g. for MDI | Workspace window that can contain decorated windows, e.g. for MDI |
| QXmlAttributes | XML屬性 | XML attributes |
| QXmlContentHandler | 接口以報告XML數據的邏輯內容 | Interface to report the logical content of XML data |
| QXmlDTDHandler | 報告XML數據DTD內容的接口 | Interface to report DTD content of XML data |
| QXmlDeclHandler | XML數據報表聲明內容接口 | Interface to report declaration content of XML data |
| QXmlDefaultHandler | 所有XML處理程序類的默認實現 | Default implementation of all XML handler classes |
| QXmlEntityResolver | 接口解決XML數據中包含的外部實體 | Interface to resolve external entities contained in XML data |
| QXmlErrorHandler | 在XML數據中報告錯誤的接口 | Interface to report errors in XML data |
| QXmlInputSource | QXMLRead子類的輸入數據 | The input data for the QXmlReader subclasses |
| QXmlLexicalHandler | XML數據的詞匯內容報告接口 | Interface to report the lexical content of XML data |
| QXmlLocator | 具有文件內解析位置信息的XML處理程序類 | The XML handler classes with information about the parsing position within a file |
| QXmlNamespaceSupport | 希望包含命名空間支持的XML讀取器的幫助類 | Helper class for XML readers which want to include namespace support |
| QXmlParseException | 用于用QXmlErrorHandler接口報告錯誤 | Used to report errors with the QXmlErrorHandler interface |
| QXmlReader | XML閱讀器的接口（即解析器） | Interface for XML readers (i.e. parsers) |
| QXmlSimpleReader | 一個簡單的XML閱讀器（解析器）的實現 | Implementation of a simple XML reader (parser) |
| QXtApplication | 促進XT/MyTf和QT小部件的混合 | Facilitates the mixing of Xt/Motif and Qt widgets |
| QXtWidget | 允許XT/MyTf和QT小部件的混合 | Allows mixing of Xt/Motif and Qt widgets |
| Qt | 需要全局性的雜項標識符的命名空間 | Namespace for miscellaneous identifiers that need to be global-like |
