- Qt 5.15
- Qt Widgets
- Qt Widgets C++ Classes
- Qt 5.15.18 Reference Documentation

# Qt Widgets C++ Classes

The Qt Widgets module extends Qt GUI with C++ widget functionality. More...

## Classes

QAbstractButton | The abstract base class of button widgets, providing functionality common to buttons
QAbstractGraphicsShapeItem | Common base for all path items
QAbstractItemDelegate | Used to display and edit data items from a model
QAbstractItemView | The basic functionality for item view classes
QAbstractScrollArea | Scrolling area with on-demand scroll bars
QAbstractSlider | Integer value within a range
QAbstractSpinBox | Spinbox and a line edit to display values
QAccessibleWidget | Implements the QAccessibleInterface for QWidgets
QAction | Abstract user interface action that can be inserted into widgets
QActionGroup | Groups actions together
QApplication | Manages the GUI application's control flow and main settings
QBoxLayout | Lines up child widgets horizontally or vertically
QButtonGroup | Container to organize groups of button widgets
QCalendarWidget | Monthly based calendar widget allowing the user to select a date
QCheckBox | Checkbox with a text label
QColorDialog | Dialog widget for specifying colors
QColormap | Maps device independent QColors to device dependent pixel values
QColumnView | Model/view implementation of a column view
QComboBox | Combined button and popup list
QCommandLinkButton | Vista style command link button
QCommonStyle | Encapsulates the common Look and Feel of a GUI
QCompleter | Completions based on an item model
QDataWidgetMapper | Mapping between a section of a data model to widgets
QDateEdit | Widget for editing dates based on the QDateTimeEdit widget
QDateTimeEdit | Widget for editing dates and times
QDial | Rounded range control (like a speedometer or potentiometer)
QDialog | The base class of dialog windows
QDialogButtonBox | Widget that presents buttons in a layout that is appropriate to the current widget style
QDockWidget | Widget that can be docked inside a QMainWindow or floated as a top-level window on the desktop
QDoubleSpinBox | Spin box widget that takes doubles
QErrorMessage | Error message display dialog
QFileDialog | Dialog that allow users to select files or directories
QFileIconProvider | File icons for the QDirModel and the QFileSystemModel classes
QFileSystemModel | Data model for the local filesystem
QFocusFrame | Focus frame which can be outside of a widget's normal paintable area
QFontComboBox | Combobox that lets the user select a font family
QFontDialog | Dialog widget for selecting a font
QFormLayout | Manages forms of input widgets and their associated labels
QFormLayout::TakeRowResult | Contains the result of a QFormLayout::takeRow() call
QFrame | The base class of widgets that can have a frame
QGesture | Represents a gesture, containing properties that describe the corresponding user input
QGestureEvent | The description of triggered gestures
QGestureRecognizer | The infrastructure for gesture recognition
QGraphicsAnchor | Represents an anchor between two items in a QGraphicsAnchorLayout
QGraphicsAnchorLayout | Layout where one can anchor widgets together in Graphics View
QGraphicsBlurEffect | Blur effect
QGraphicsColorizeEffect | Colorize effect
QGraphicsDropShadowEffect | Drop shadow effect
QGraphicsEffect | The base class for all graphics effects
QGraphicsEllipseItem | Ellipse item that you can add to a QGraphicsScene
QGraphicsGridLayout | Grid layout for managing widgets in Graphics View
QGraphicsItem | The base class for all graphical items in a QGraphicsScene
QGraphicsItemGroup | Container that treats a group of items as a single item
QGraphicsLayout | The base class for all layouts in Graphics View
QGraphicsLayoutItem | Can be inherited to allow your custom items to be managed by layouts
QGraphicsLineItem | Line item that you can add to a QGraphicsScene
QGraphicsLinearLayout | Horizontal or vertical layout for managing widgets in Graphics View
QGraphicsObject | Base class for all graphics items that require signals, slots and properties
QGraphicsOpacityEffect | Opacity effect
QGraphicsPathItem | Path item that you can add to a QGraphicsScene
QGraphicsPixmapItem | Pixmap item that you can add to a QGraphicsScene
QGraphicsPolygonItem | Polygon item that you can add to a QGraphicsScene
QGraphicsProxyWidget | Proxy layer for embedding a QWidget in a QGraphicsScene
QGraphicsRectItem | Rectangle item that you can add to a QGraphicsScene
QGraphicsRotation | Rotation transformation around a given axis
QGraphicsScale | Scale transformation
QGraphicsScene | Surface for managing a large number of 2D graphical items
QGraphicsSceneContextMenuEvent | Context menu events in the graphics view framework
QGraphicsSceneDragDropEvent | Events for drag and drop in the graphics view framework
QGraphicsSceneEvent | Base class for all graphics view related events
QGraphicsSceneHelpEvent | Events when a tooltip is requested
QGraphicsSceneHoverEvent | Hover events in the graphics view framework
QGraphicsSceneMouseEvent | Mouse events in the graphics view framework
QGraphicsSceneMoveEvent | Events for widget moving in the graphics view framework
QGraphicsSceneResizeEvent | Events for widget resizing in the graphics view framework
QGraphicsSceneWheelEvent | Wheel events in the graphics view framework
QGraphicsSimpleTextItem | Simple text path item that you can add to a QGraphicsScene
QGraphicsTextItem | Text item that you can add to a QGraphicsScene to display formatted text
QGraphicsTransform | Abstract base class for building advanced transformations on QGraphicsItems
QGraphicsView | Widget for displaying the contents of a QGraphicsScene
QGraphicsWidget | The base class for all widget items in a QGraphicsScene
QGridLayout | Lays out widgets in a grid
QGroupBox | Group box frame with a title
QHBoxLayout | Lines up widgets horizontally
QHeaderView | Header row or header column for item views
QInputDialog | Simple convenience dialog to get a single value from the user
QItemDelegate | Display and editing facilities for data items from a model
QItemEditorCreator | Makes it possible to create item editor creator bases without subclassing QItemEditorCreatorBase
QItemEditorCreatorBase | Abstract base class that must be subclassed when implementing new item editor creators
QItemEditorFactory | Widgets for editing item data in views and delegates
QKeyEventTransition | Transition for key events
QKeySequenceEdit | Allows to input a QKeySequence
QLCDNumber | Displays a number with LCD-like digits
QLabel | Text or image display
QLayout | The base class of geometry managers
QLayoutItem | Abstract item that a QLayout manipulates
QLineEdit | One-line text editor
QListView | List or icon view onto a model
QListWidget | Item-based list widget
QListWidgetItem | Item for use with the QListWidget item view class
QMainWindow | Main application window
QMdiArea | Area in which MDI windows are displayed
QMdiSubWindow | Subwindow class for QMdiArea
QMenu | Menu widget for use in menu bars, context menus, and other popup menus
QMenuBar | Horizontal menu bar
QMessageBox | Modal dialog for informing the user or for asking the user a question and receiving an answer
QMouseEventTransition | Transition for mouse events
QOpenGLWidget | Widget for rendering OpenGL graphics
QPanGesture | Describes a panning gesture made by the user
QPinchGesture | Describes a pinch gesture made by the user
QPlainTextDocumentLayout | Implements a plain text layout for QTextDocument
QPlainTextEdit | Widget that is used to edit and display plain text
QProgressBar | Horizontal or vertical progress bar
QProgressDialog | Feedback on the progress of a slow operation
QProxyStyle | Convenience class that simplifies dynamically overriding QStyle elements
QPushButton | Command button
QRadioButton | Radio button with a text label
QRubberBand | Rectangle or line that can indicate a selection or a boundary
QScrollArea | Scrolling view onto another widget
QScrollBar | Vertical or horizontal scroll bar
QScroller | Enables kinetic scrolling for any scrolling widget or graphics item
QScrollerProperties | Stores the settings for a QScroller
QShortcut | Used to create keyboard shortcuts
QSizeGrip | Resize handle for resizing top-level windows
QSizePolicy | Layout attribute describing horizontal and vertical resizing policy
QSlider | Vertical or horizontal slider
QSpacerItem | Blank space in a layout
QSpinBox | Spin box widget
QSplashScreen | Splash screen that can be shown during application startup
QSplitter | Implements a splitter widget
QSplitterHandle | Handle functionality for the splitter
QStackedLayout | Stack of widgets where only one widget is visible at a time
QStackedWidget | Stack of widgets where only one widget is visible at a time
QStandardItemEditorCreator | The possibility to register widgets without having to subclass QItemEditorCreatorBase
QStatusBar | Horizontal bar suitable for presenting status information
QStyle | Abstract base class that encapsulates the look and feel of a GUI
QStyleFactory | Creates QStyle objects
QStyleHintReturn | Style hints that return more than basic data types
QStyleHintReturnMask | Style hints that return a QRegion
QStyleHintReturnVariant | Style hints that return a QVariant
QStyleOption | Stores the parameters used by QStyle functions
QStyleOptionButton | Used to describe the parameters for drawing buttons
QStyleOptionComboBox | Used to describe the parameter for drawing a combobox
QStyleOptionComplex | Used to hold parameters that are common to all complex controls
QStyleOptionDockWidget | Used to describe the parameters for drawing a dock widget
QStyleOptionFocusRect | Used to describe the parameters for drawing a focus rectangle with QStyle
QStyleOptionFrame | Used to describe the parameters for drawing a frame
QStyleOptionGraphicsItem | Used to describe the parameters needed to draw a QGraphicsItem
QStyleOptionGroupBox | Describes the parameters for drawing a group box
QStyleOptionHeader | Used to describe the parameters for drawing a header
QStyleOptionMenuItem | Used to describe the parameter necessary for drawing a menu item
QStyleOptionProgressBar | Used to describe the parameters necessary for drawing a progress bar
QStyleOptionRubberBand | Used to describe the parameters needed for drawing a rubber band
QStyleOptionSizeGrip | Used to describe the parameter for drawing a size grip
QStyleOptionSlider | Used to describe the parameters needed for drawing a slider
QStyleOptionSpinBox | Used to describe the parameters necessary for drawing a spin box
QStyleOptionTab | Used to describe the parameters for drawing a tab bar
QStyleOptionTabBarBase | Used to describe the base of a tab bar, i.e. the part that the tab bar usually overlaps with
QStyleOptionTabWidgetFrame | Used to describe the parameters for drawing the frame around a tab widget
QStyleOptionTitleBar | Used to describe the parameters for drawing a title bar
QStyleOptionToolBar | Used to describe the parameters for drawing a toolbar
QStyleOptionToolBox | Used to describe the parameters needed for drawing a tool box
QStyleOptionToolButton | Used to describe the parameters for drawing a tool button
QStyleOptionViewItem | Used to describe the parameters used to draw an item in a view widget
QStylePainter | Convenience class for drawing QStyle elements inside a widget
QStylePlugin | Abstract base for custom QStyle plugins
QStyledItemDelegate | Display and editing facilities for data items from a model
QSwipeGesture | Describes a swipe gesture made by the user
QSystemTrayIcon | Icon for an application in the system tray
QTabBar | Tab bar, e.g. for use in tabbed dialogs
QTabWidget | Stack of tabbed widgets
QTableView | Default model/view implementation of a table view
QTableWidget | Item-based table view with a default model
QTableWidgetItem | Item for use with the QTableWidget class
QTableWidgetSelectionRange | Way to interact with selection in a model without using model indexes and a selection model
QTapAndHoldGesture | Describes a tap-and-hold (aka LongTap) gesture made by the user
QTapGesture | Describes a tap gesture made by the user
QTextBrowser | Rich text browser with hypertext navigation
QTextEdit | Widget that is used to edit and display both plain and rich text
QTextEdit::ExtraSelection | QTextEdit::ExtraSelection structure provides a way of specifying a character format for a given selection in a document
QTileRules | The rules used to draw a pixmap or image split into nine segments
QTimeEdit | Widget for editing times based on the QDateTimeEdit widget
QToolBar | Movable panel that contains a set of controls
QToolBox | Column of tabbed widget items
QToolButton | Quick-access button to commands or options, usually used inside a QToolBar
QToolTip | Tool tips (balloon help) for any widget
QTreeView | Default model/view implementation of a tree view
QTreeWidget | Tree view that uses a predefined tree model
QTreeWidgetItem | Item for use with the QTreeWidget convenience class
QTreeWidgetItemIterator | Way to iterate over the items in a QTreeWidget instance
QUndoCommand | The base class of all commands stored on a QUndoStack
QUndoGroup | Group of QUndoStack objects
QUndoStack | Stack of QUndoCommand objects
QUndoView | Displays the contents of a QUndoStack
QVBoxLayout | Lines up widgets vertically
QWhatsThis | Simple description of any widget, i.e. answering the question "What's This?"
QWidget | The base class of all user interface objects
QWidgetAction | Extends QAction by an interface for inserting custom widgets into action based containers, such as toolbars
QWidgetItem | Layout item that represents a widget
QWizard | Framework for wizards
QWizardPage | The base class for wizard pages

## Detailed Description

To include the definitions of the module's classes, use the following directive:

     #include <QtWidgets>

To link against the module, add this line to your qmake `.pro` file:

     QT += widgets