Qt Namespace

The Qt namespace contains miscellaneous identifiers used throughout the Qt library. More...

Header: #include <Qt>
qmake: QT += core

Types

flags Alignment
enum AlignmentFlag { AlignLeft, AlignRight, AlignHCenter, AlignJustify, ..., AlignVertical_Mask }
enum AnchorPoint { AnchorLeft, AnchorHorizontalCenter, AnchorRight, AnchorTop, AnchorVerticalCenter, AnchorBottom }
enum ApplicationAttribute { AA_DontShowIconsInMenus, AA_DontShowShortcutsInContextMenus, AA_NativeWindows, AA_DontCreateNativeWidgetSiblings, ..., AA_X11InitThreads }
enum ApplicationState { ApplicationSuspended, ApplicationHidden, ApplicationInactive, ApplicationActive }
flags ApplicationStates
enum ArrowType { NoArrow, UpArrow, DownArrow, LeftArrow, RightArrow }
enum AspectRatioMode { IgnoreAspectRatio, KeepAspectRatio, KeepAspectRatioByExpanding }
enum Axis { XAxis, YAxis, ZAxis }
enum BGMode { TransparentMode, OpaqueMode }
enum BrushStyle { NoBrush, SolidPattern, Dense1Pattern, Dense2Pattern, ..., TexturePattern }
enum CaseSensitivity { CaseInsensitive, CaseSensitive }
enum CheckState { Unchecked, PartiallyChecked, Checked }
enum ChecksumType { ChecksumIso3309, ChecksumItuV41 }
enum ClipOperation { NoClip, ReplaceClip, IntersectClip }
enum ConnectionType { AutoConnection, DirectConnection, QueuedConnection, BlockingQueuedConnection, UniqueConnection }
enum ContextMenuPolicy { NoContextMenu, PreventContextMenu, DefaultContextMenu, ActionsContextMenu, CustomContextMenu }
enum CoordinateSystem { DeviceCoordinates, LogicalCoordinates }
enum Corner { TopLeftCorner, TopRightCorner, BottomLeftCorner, BottomRightCorner }
enum CursorMoveStyle { LogicalMoveStyle, VisualMoveStyle }
enum CursorShape { ArrowCursor, UpArrowCursor, CrossCursor, WaitCursor, ..., BitmapCursor }
enum DateFormat { TextDate, ISODate, ISODateWithMs, SystemLocaleShortDate, ..., RFC2822Date }
enum DayOfWeek { Monday, Tuesday, Wednesday, Thursday, ..., Sunday }
enum DockWidgetArea { LeftDockWidgetArea, RightDockWidgetArea, TopDockWidgetArea, BottomDockWidgetArea, AllDockWidgetAreas, NoDockWidgetArea }
flags DockWidgetAreas
enum DropAction { CopyAction, MoveAction, LinkAction, ActionMask, IgnoreAction, TargetMoveAction }
flags DropActions
enum Edge { TopEdge, LeftEdge, RightEdge, BottomEdge }
flags Edges
enum EnterKeyType { EnterKeyDefault, EnterKeyReturn, EnterKeyDone, EnterKeyGo, ..., EnterKeyPrevious }
enum EventPriority { HighEventPriority, NormalEventPriority, LowEventPriority }
enum FillRule { OddEvenFill, WindingFill }
enum FindChildOption { FindDirectChildrenOnly, FindChildrenRecursively }
flags FindChildOptions
enum FocusPolicy { TabFocus, ClickFocus, StrongFocus, WheelFocus, NoFocus }
enum FocusReason { MouseFocusReason, TabFocusReason, BacktabFocusReason, ActiveWindowFocusReason, ..., OtherFocusReason }
enum GestureFlag { DontStartGestureOnChildren, ReceivePartialGestures, IgnoredGesturesPropagateToParent }
flags GestureFlags
enum GestureState { NoGesture, GestureStarted, GestureUpdated, GestureFinished, GestureCanceled }
enum GestureType { TapGesture, TapAndHoldGesture, PanGesture, PinchGesture, SwipeGesture, CustomGesture }
enum GlobalColor { white, black, red, darkRed, ..., color1 }
typedef HANDLE
enum HitTestAccuracy { ExactHit, FuzzyHit }
enum ImageConversionFlag { AutoColor, ColorOnly, MonoOnly, DiffuseDither, ..., NoFormatConversion }
flags ImageConversionFlags
enum InputMethodHint { ImhNone, ImhHiddenText, ImhSensitiveData, ImhNoAutoUppercase, ..., ImhExclusiveInputMask }
flags InputMethodHints
flags InputMethodQueries
enum InputMethodQuery { ImEnabled, ImMicroFocus, ImCursorRectangle, ImFont, ..., ImQueryAll }
enum ItemDataRole { DisplayRole, DecorationRole, EditRole, ToolTipRole, ..., UserRole }
enum ItemFlag { NoItemFlags, ItemIsSelectable, ItemIsEditable, ItemIsDragEnabled, ..., ItemIsUserTristate }
flags ItemFlags
enum ItemSelectionMode { ContainsItemShape, IntersectsItemShape, ContainsItemBoundingRect, IntersectsItemBoundingRect }
enum ItemSelectionOperation { ReplaceSelection, AddToSelection }
enum Key { Key_Escape, Key_Tab, Key_Backtab, Key_Backspace, ..., Key_Cancel }
enum KeyboardModifier { NoModifier, ShiftModifier, ControlModifier, AltModifier, ..., GroupSwitchModifier }
flags KeyboardModifiers
enum LayoutDirection { LeftToRight, RightToLeft, LayoutDirectionAuto }
enum MaskMode { MaskInColor, MaskOutColor }
enum MatchFlag { MatchExactly, MatchFixedString, MatchContains, MatchStartsWith, ..., MatchRecursive }
flags MatchFlags
enum Modifier { SHIFT, META, CTRL, ALT, UNICODE_ACCEL }
enum MouseButton { NoButton, AllButtons, LeftButton, RightButton, ..., ExtraButton24 }
flags MouseButtons
enum MouseEventFlag { MouseEventCreatedDoubleClick }
flags MouseEventFlags
enum MouseEventSource { MouseEventNotSynthesized, MouseEventSynthesizedBySystem, MouseEventSynthesizedByQt, MouseEventSynthesizedByApplication }
enum NativeGestureType { BeginNativeGesture, EndNativeGesture, PanNativeGesture, ZoomNativeGesture, ..., SwipeNativeGesture }
enum NavigationMode { NavigationModeNone, NavigationModeKeypadTabOrder, NavigationModeKeypadDirectional, NavigationModeCursorAuto, NavigationModeCursorForceVisible }
enum Orientation { Horizontal, Vertical }
flags Orientations
enum PenCapStyle { FlatCap, SquareCap, RoundCap }
enum PenJoinStyle { MiterJoin, BevelJoin, RoundJoin, SvgMiterJoin }
enum PenStyle { NoPen, SolidLine, DashLine, DotLine, ..., CustomDashLine }
enum ScreenOrientation { PrimaryOrientation, LandscapeOrientation, PortraitOrientation, InvertedLandscapeOrientation, InvertedPortraitOrientation }
flags ScreenOrientations
enum ScrollBarPolicy { ScrollBarAsNeeded, ScrollBarAlwaysOff, ScrollBarAlwaysOn }
enum ScrollPhase { NoScrollPhase, ScrollBegin, ScrollUpdate, ScrollEnd }
enum ShortcutContext { WidgetShortcut, WidgetWithChildrenShortcut, WindowShortcut, ApplicationShortcut }
enum SizeHint { MinimumSize, PreferredSize, MaximumSize, MinimumDescent }
enum SizeMode { AbsoluteSize, RelativeSize }
enum SortOrder { AscendingOrder, DescendingOrder }
enum TabFocusBehavior { NoTabFocus, TabFocusTextControls, TabFocusListControls, TabFocusAllControls }
enum TextElideMode { ElideLeft, ElideRight, ElideMiddle, ElideNone }
enum TextFlag { TextSingleLine, TextDontClip, TextExpandTabs, TextShowMnemonic, ..., TextJustificationForced }
enum TextFormat { PlainText, RichText, AutoText }
enum TextInteractionFlag { NoTextInteraction, TextSelectableByMouse, TextSelectableByKeyboard, LinksAccessibleByMouse, ..., TextBrowserInteraction }
flags TextInteractionFlags
enum TileRule { StretchTile, RepeatTile, RoundTile }
enum TimeSpec { LocalTime, UTC, OffsetFromUTC, TimeZone }
enum TimerType { PreciseTimer, CoarseTimer, VeryCoarseTimer }
enum ToolBarArea { LeftToolBarArea, RightToolBarArea, TopToolBarArea, BottomToolBarArea, AllToolBarAreas, NoToolBarArea }
flags ToolBarAreas
enum ToolButtonStyle { ToolButtonIconOnly, ToolButtonTextOnly, ToolButtonTextBesideIcon, ToolButtonTextUnderIcon, ToolButtonFollowStyle }
enum TouchPointState { TouchPointPressed, TouchPointMoved, TouchPointStationary, TouchPointReleased }
flags TouchPointStates
enum TransformationMode { FastTransformation, SmoothTransformation }
enum UIEffect { UI_AnimateMenu, UI_FadeMenu, UI_AnimateCombo, UI_AnimateTooltip, UI_FadeTooltip, UI_AnimateToolBox }
enum WhiteSpaceMode { WhiteSpaceNormal, WhiteSpacePre, WhiteSpaceNoWrap }
enum WidgetAttribute { WA_AcceptDrops, WA_AlwaysShowToolTips, WA_ContentsPropagated, WA_CustomWhatsThis, ..., WA_ContentsMarginsRespectsSafeArea }
flags WindowFlags
enum WindowFrameSection { NoSection, LeftSection, TopLeftSection, TopSection, ..., TitleBarArea }
enum WindowModality { NonModal, WindowModal, ApplicationModal }
enum WindowState { WindowNoState, WindowMinimized, WindowMaximized, WindowFullScreen, WindowActive }
flags WindowStates
enum WindowType { Widget, Window, Dialog, Sheet, ..., WindowType_Mask }

Functions

QString convertFromPlainText(const QString &plain, Qt::WhiteSpaceMode mode = WhiteSpacePre)
bool mightBeRichText(const QString &text)

Detailed Description

The Qt namespace contains miscellaneous identifiers used throughout the Qt library.

Type Documentation

enum Qt::AlignmentFlag
flags Qt::Alignment

This enum type is used to describe alignment. It contains horizontal and vertical flags that can be combined to produce the required effect.

The TextElideMode enum can also be used in many situations to fine-tune the appearance of aligned text.

The horizontal flags are:

Constant Value Description
Qt::AlignLeft 0x0001 Aligns with the left edge.
Qt::AlignRight 0x0002 Aligns with the right edge.
Qt::AlignHCenter 0x0004 Centers horizontally in the available space.
Qt::AlignJustify 0x0008 Justifies the text in the available space.

The vertical flags are:

Constant Value Description
Qt::AlignTop 0x0020 Aligns with the top.
Qt::AlignBottom 0x0040 Aligns with the bottom.
Qt::AlignVCenter 0x0080 Centers vertically in the available space.
Qt::AlignBaseline 0x0100 Aligns with the baseline.

You can use only one of the horizontal flags at a time. There is one two-dimensional flag:

Constant Value Description
Qt::AlignCenter AlignVCenter | AlignHCenter Centers in both dimensions.

You can use at most one horizontal and one vertical flag at a time. Qt::AlignCenter counts as both horizontal and vertical.

Three enum values are useful in applications that can be run in right-to-left mode:

Constant Value Description
Qt::AlignAbsolute 0x0010 If the widget's layout direction is Qt::RightToLeft (instead of Qt::LeftToRight, the default), Qt::AlignLeft refers to the right edge and Qt::AlignRight to the left edge. This is normally the desired behavior. If you want Qt::AlignLeft to always mean "left" and Qt::AlignRight to always mean "right", combine the flag with Qt::AlignAbsolute.
Qt::AlignLeading AlignLeft Synonym for Qt::AlignLeft.
Qt::AlignTrailing AlignRight Synonym for Qt::AlignRight.

Masks:

Constant Value
Qt::AlignHorizontal_Mask AlignLeft | AlignRight | AlignHCenter | AlignJustify | AlignAbsolute
Qt::AlignVertical_Mask AlignTop | AlignBottom | AlignVCenter | AlignBaseline

Conflicting combinations of flags have undefined meanings.

The Alignment type is a typedef for QFlags<AlignmentFlag>. It stores an OR combination of AlignmentFlag values.

enum Qt::AnchorPoint

Specifies a side of a layout item that can be anchored. This is used by QGraphicsAnchorLayout.

Constant Value Description
Qt::AnchorLeft 0 The left side of a layout item.
Qt::AnchorHorizontalCenter 1 A "virtual" side that is centered between the left and the right side of a layout item.
Qt::AnchorRight 2 The right side of a layout item.
Qt::AnchorTop 3 The top side of a layout item.
Qt::AnchorVerticalCenter 4 A "virtual" side that is centered between the top and the bottom side of a layout item.
Qt::AnchorBottom 5 The bottom side of a layout item.

See also QGraphicsAnchorLayout.

enum Qt::ApplicationAttribute

This enum describes attributes that change the behavior of application-wide features. These are enabled and disabled using QCoreApplication::setAttribute(), and can be tested for with QCoreApplication::testAttribute().

Constant Value Description
Qt::AA_DontShowIconsInMenus 2 Actions with the Icon property won't be shown in any menus unless specifically set by the QAction::iconVisibleInMenu property. Menus that are currently open or menus already created in the native macOS menubar may not pick up a change in this attribute. Changes in the QAction::iconVisibleInMenu property will always be picked up.
Qt::AA_DontShowShortcutsInContextMenus 28 Actions with the Shortcut property won't be shown in any shortcut menus unless specifically set by the QAction::shortcutVisibleInContextMenu property. This value was added in Qt 5.10.
Qt::AA_NativeWindows 3 Ensures that widgets have native windows.
Qt::AA_DontCreateNativeWidgetSiblings 4 Ensures that siblings of native widgets stay non-native unless specifically set by the Qt::WA_NativeWindow attribute.
Qt::AA_PluginApplication 5 Indicates that Qt is used to author a plugin. Depending on the operating system, it suppresses specific initializations that do not necessarily make sense in the plugin case. For example on macOS, this includes avoiding loading our nib for the main menu and not taking possession of the native menu bar. Setting this attribute to true will also set the AA_DontUseNativeMenuBar attribute to true. It also disables native event filters. This attribute must be set before QGuiApplication constructed. This value was added in Qt 5.7.
Qt::AA_DontUseNativeMenuBar 6 All menubars created while this attribute is set to true won't be used as a native menubar (e.g, the menubar at the top of the main screen on macOS).
Qt::AA_MacDontSwapCtrlAndMeta 7 On macOS by default, Qt swaps the Control and Meta (Command) keys (i.e., whenever Control is pressed, Qt sends Meta, and whenever Meta is pressed Control is sent). When this attribute is true, Qt will not do the flip. QKeySequence::StandardKey will also flip accordingly (i.e., QKeySequence::Copy will be Command+C on the keyboard regardless of the value set, though what is output for QKeySequence::toString() will be different).
Qt::AA_Use96Dpi 8 Assume the screen has a resolution of 96 DPI rather than using the OS-provided resolution. This will cause font rendering to be consistent in pixels-per-point across devices rather than defining 1 point as 1/72 inch.
Qt::AA_SynthesizeTouchForUnhandledMouseEvents 11 All mouse events that are not accepted by the application will be translated to touch events instead.
Qt::AA_SynthesizeMouseForUnhandledTouchEvents 12 All touch events that are not accepted by the application will be translated to left button mouse events instead. This attribute is enabled by default.
Qt::AA_UseHighDpiPixmaps 13 Make QIcon::pixmap() generate high-dpi pixmaps that can be larger than the requested size. Such pixmaps will have devicePixelRatio() set to a value higher than 1. After setting this attribute, application code that uses pixmap sizes in layout geometry calculations should typically divide by devicePixelRatio() to get device-independent layout geometry.
Qt::AA_ForceRasterWidgets 14 Make top-level widgets use pure raster surfaces, and do not support non-native GL-based child widgets.
Qt::AA_UseDesktopOpenGL 15 Forces the usage of desktop OpenGL (for example, opengl32.dll or libGL.so) on platforms that use dynamic loading of the OpenGL implementation. This attribute must be set before QGuiApplication is constructed. This value was added in Qt 5.3.
Qt::AA_UseOpenGLES 16 Forces the usage of OpenGL ES 2.0 or higher on platforms that use dynamic loading of the OpenGL implementation. This attribute must be set before QGuiApplication is constructed. This value was added in Qt 5.3.
Qt::AA_UseSoftwareOpenGL 17 Forces the usage of a software based OpenGL implementation on platforms that use dynamic loading of the OpenGL implementation. This will typically be a patched build of Mesa llvmpipe, providing OpenGL 2.1. The value may have no effect if no such OpenGL implementation is available. The default name of this library is opengl32sw.dll and can be overridden by setting the environment variable QT_OPENGL_DLL. See the platform-specific pages, for instance Qt for Windows, for more information. This attribute must be set before QGuiApplication is constructed. This value was added in Qt 5.4.
Qt::AA_ShareOpenGLContexts 18 Enables resource sharing between the OpenGL contexts used by classes like QOpenGLWidget and QQuickWidget. This allows sharing OpenGL resources, like textures, between QOpenGLWidget instances that belong to different top-level windows. This attribute must be set before QGuiApplication is constructed. This value was added in Qt 5.4.
Qt::AA_SetPalette 19 Indicates whether a palette was explicitly set on the QGuiApplication. This value was added in Qt 5.5.
Qt::AA_EnableHighDpiScaling 20 Enables high-DPI scaling in Qt on supported platforms (see also High DPI Displays). Supported platforms are X11, Windows and Android. Enabling makes Qt scale the main (device independent) coordinate system according to display scale factors provided by the operating system. This corresponds to setting the QT_AUTO_SCREEN​_SCALE_FACTOR environment variable to 1. This attribute must be set before QGuiApplication is constructed. This value was added in Qt 5.6.
Qt::AA_DisableHighDpiScaling 21 Disables high-DPI scaling in Qt, exposing window system coordinates. Note that the window system may do its own scaling, so this does not guarantee that QPaintDevice::devicePixelRatio() will be equal to 1. In addition, scale factors set by QT_SCALE_FACTOR will not be affected. This corresponds to setting the QT_AUTO_SCREEN​_SCALE_FACTOR environment variable to 0. This attribute must be set before QGuiApplication is constructed. This value was added in Qt 5.6.
Qt::AA_UseStyleSheetPropagationInWidgetStyles 22 By default, Qt Style Sheets disable regular QWidget palette and font propagation. When this flag is enabled, font and palette changes propagate as though the user had manually called the corresponding QWidget methods. See The Style Sheet Syntax - Inheritance for more details. This value was added in Qt 5.7.
Qt::AA_DontUseNativeDialogs 23 All dialogs created while this attribute is set to true won't use the native dialogs provided by the platform. This value was added in Qt 5.7.
Qt::AA_SynthesizeMouseForUnhandledTabletEvents 24 All tablet events that are not accepted by the application will be translated to mouse events instead. This attribute is enabled by default. This value was added in Qt 5.7.
Qt::AA_CompressHighFrequencyEvents 25 Enables compression of certain frequent events. On the X11 windowing system, the default value is true, which means that QEvent::MouseMove, QEvent::TouchUpdate, and changes in window size and position will be combined whenever they occur more frequently than the application handles them, so that they don't accumulate and overwhelm the application later. On other platforms, the default is false. (In the future, the compression feature may be implemented across platforms.) You can test the attribute to see whether compression is enabled. If your application needs to handle all events with no compression, you can unset this attribute. Notice that input events from tablet devices will not be compressed. See AA_CompressTabletEvents if you want these to be compressed as well. This value was added in Qt 5.7.
Qt::AA_CompressTabletEvents 29 Enables compression of input events from tablet devices. Notice that AA_CompressHighFrequencyEvents must be true for events compression to be enabled, and that this flag extends the former to tablet events. Its default value is false. This value was added in Qt 5.10.
Qt::AA_DontCheckOpenGLContextThreadAffinity 26 When making a context current using QOpenGLContext, do not check that the QObject thread affinity of the QOpenGLContext object is the same thread calling makeCurrent(). This value was added in Qt 5.8.
Qt::AA_DisableShaderDiskCache 27 Disables caching of shader program binaries on disk. By default Qt Quick, QPainter's OpenGL backend, and any application using QOpenGLShaderProgram with one of its addCacheableShaderFromSource overloads will employ a disk-based program binary cache in either the shared or per-process cache storage location, on systems that support glProgramBinary(). In the unlikely event of this being problematic, set this attribute to disable all disk-based caching of shaders.
Qt::AA_DisableWindowContextHelpButton 30 Disables the WindowContextHelpButtonHint by default on Qt::Sheet and Qt::Dialog widgets. This hides the ? button on Windows, which only makes sense if you use QWhatsThis functionality. This value was added in Qt 5.10. In Qt 6, WindowContextHelpButtonHint will not be set by default.

The following values are deprecated or obsolete:

Constant Value Description
Qt::AA_ImmediateWidgetCreation 0 This attribute is no longer fully supported in Qt 5. It ensures that widgets are created as soon as they are constructed. By default, resources for widgets are allocated on demand to improve efficiency and minimize resource usage. Setting or clearing this attribute affects widgets constructed after the change. Setting it tells Qt to create toplevel windows immediately. Therefore, if it is important to minimize resource consumption, do not set this attribute.
Qt::AA_MacPluginApplication AA_PluginApplication This attribute has been deprecated. Use AA_PluginApplication instead.
Qt::AA_MSWindowsUseDirect3DByDefault 1 This value is obsolete and has no effect.
Qt::AA_X11InitThreads 10 This value is obsolete and has no effect.

enum Qt::ApplicationState
flags Qt::ApplicationStates

This enum type is used to specify the current state of the application.

The states are

Constant Value Description
Qt::ApplicationSuspended 0x00000000 The application is about to suspend. When entering this state, the application should save its state, cease all activities, and be prepared for code execution to stop. While suspended, the application can be killed at any time without further warnings (e.g. when low memory forces the OS to purge suspended applications).
Qt::ApplicationHidden 0x00000001 The application is hidden and runs in the background. This is the normal state for applications that need to do background processing, like playing music, while the user interacts with other applications. The application should free up all graphical resources when entering this state.
Qt::ApplicationInactive 0x00000002 The application is visible, but not selected to be in front. On desktop platforms, this typically means that the user activated another application. On mobile platforms, it is more common to enter this state when the OS is interrupting the user with e.g. incoming calls or SMS-messages. While in this state, consider reducing CPU-intensive tasks.
Qt::ApplicationActive 0x00000004 The application is visible and selected to be in front.

This enum was introduced or modified in Qt 5.1.

The ApplicationStates type is a typedef for QFlags<ApplicationState>. It stores an OR combination of ApplicationState values.

enum Qt::ArrowType

Constant Value
Qt::NoArrow 0
Qt::UpArrow 1
Qt::DownArrow 2
Qt::LeftArrow 3
Qt::RightArrow 4

enum Qt::AspectRatioMode

This enum type defines what happens to the aspect ratio when scaling an rectangle.

Constant Value Description
Qt::IgnoreAspectRatio 0 The size is scaled freely. The aspect ratio is not preserved.
Qt::KeepAspectRatio 1 The size is scaled to a rectangle as large as possible inside a given rectangle, preserving the aspect ratio.
Qt::KeepAspectRatioByExpanding 2 The size is scaled to a rectangle as small as possible outside a given rectangle, preserving the aspect ratio.

See also QSize::scale() and QImage::scaled().

enum Qt::Axis

This enum type defines three values to represent the three axes in the cartesian coordinate system.

Constant Value Description
Qt::XAxis 0 The X axis.
Qt::YAxis 1 The Y axis.
Qt::ZAxis 2 The Z axis.

See also QTransform::rotate() and QTransform::rotateRadians().

enum Qt::BGMode

Background mode:

Constant Value
Qt::TransparentMode 0
Qt::OpaqueMode 1

enum Qt::BrushStyle

This enum type defines the brush styles supported by Qt, i.e. the fill pattern of shapes drawn using QPainter.

Brush Styles

Constant Value Description
Qt::NoBrush 0 No brush pattern.
Qt::SolidPattern 1 Uniform color.
Qt::Dense1Pattern 2 Extremely dense brush pattern.
Qt::Dense2Pattern 3 Very dense brush pattern.
Qt::Dense3Pattern 4 Somewhat dense brush pattern.
Qt::Dense4Pattern 5 Half dense brush pattern.
Qt::Dense5Pattern 6 Somewhat sparse brush pattern.
Qt::Dense6Pattern 7 Very sparse brush pattern.
Qt::Dense7Pattern 8 Extremely sparse brush pattern.
Qt::HorPattern 9 Horizontal lines.
Qt::VerPattern 10 Vertical lines.
Qt::CrossPattern 11 Crossing horizontal and vertical lines.
Qt::BDiagPattern 12 Backward diagonal lines.
Qt::FDiagPattern 13 Forward diagonal lines.
Qt::DiagCrossPattern 14 Crossing diagonal lines.
Qt::LinearGradientPattern 15 Linear gradient (set using a dedicated QBrush constructor).
Qt::ConicalGradientPattern 17 Conical gradient (set using a dedicated QBrush constructor).
Qt::RadialGradientPattern 16 Radial gradient (set using a dedicated QBrush constructor).
Qt::TexturePattern 24 Custom pattern (see QBrush::setTexture()).

See also QBrush.

enum Qt::CaseSensitivity

Constant Value
Qt::CaseInsensitive 0
Qt::CaseSensitive 1

enum Qt::CheckState

This enum describes the state of checkable items, controls, and widgets.

Constant Value Description
Qt::Unchecked 0 The item is unchecked.
Qt::PartiallyChecked 1 The item is partially checked. Items in hierarchical models may be partially checked if some, but not all, of their children are checked.
Qt::Checked 2 The item is checked.

See also QCheckBox, Qt::ItemFlags, and Qt::ItemDataRole.

enum Qt::ChecksumType

This enum describes the possible standards used by qChecksum().

Constant Value Description
Qt::ChecksumIso3309 0 Checksum calculation based on ISO 3309.
Qt::ChecksumItuV41 1 Checksum calculation based on ITU-V.41.

This enum was introduced or modified in Qt 5.9.

enum Qt::ClipOperation

Constant Value Description
Qt::NoClip 0 This operation turns clipping off.
Qt::ReplaceClip 1 Replaces the current clip path/rect/region with the one supplied in the function call.
Qt::IntersectClip 2 Intersects the current clip path/rect/region with the one supplied in the function call.

enum Qt::ConnectionType

This enum describes the types of connection that can be used between signals and slots. In particular, it determines whether a particular signal is delivered to a slot immediately or queued for delivery at a later time.

Constant Value Description
Qt::AutoConnection 0 (Default) If the receiver lives in the thread that emits the signal, Qt::DirectConnection is used. Otherwise, Qt::QueuedConnection is used. The connection type is determined when the signal is emitted.
Qt::DirectConnection 1 The slot is invoked immediately when the signal is emitted. The slot is executed in the signalling thread.
Qt::QueuedConnection 2 The slot is invoked when control returns to the event loop of the receiver's thread. The slot is executed in the receiver's thread.
Qt::BlockingQueuedConnection 3 Same as Qt::QueuedConnection, except that the signalling thread blocks until the slot returns. This connection must not be used if the receiver lives in the signalling thread, or else the application will deadlock.
Qt::UniqueConnection 0x80 This is a flag that can be combined with any one of the above connection types, using a bitwise OR. When Qt::UniqueConnection is set, QObject::connect() will fail if the connection already exists (i.e. if the same signal is already connected to the same slot for the same pair of objects). This flag was introduced in Qt 4.6.

With queued connections, the parameters must be of types that are known to Qt's meta-object system, because Qt needs to copy the arguments to store them in an event behind the scenes. If you try to use a queued connection and get the error message:

QObject::connect: Cannot queue arguments of type 'MyType'

Call qRegisterMetaType() to register the data type before you establish the connection.

When using signals and slots with multiple threads, see Signals and Slots Across Threads.

See also Thread Support in Qt, QObject::connect(), qRegisterMetaType(), and Q_DECLARE_METATYPE().

enum Qt::ContextMenuPolicy

This enum type defines the various policies a widget can have with respect to showing a context menu.

Constant Value Description
Qt::NoContextMenu 0 the widget does not feature a context menu, context menu handling is deferred to the widget's parent.
Qt::PreventContextMenu 4 the widget does not feature a context menu, and in contrast to NoContextMenu, the handling is not deferred to the widget's parent. This means that all right mouse button events are guaranteed to be delivered to the widget itself through QWidget::mousePressEvent(), and QWidget::mouseReleaseEvent().
Qt::DefaultContextMenu 1 the widget's QWidget::contextMenuEvent() handler is called.
Qt::ActionsContextMenu 2 the widget displays its QWidget::actions() as context menu.
Qt::CustomContextMenu 3 the widget emits the QWidget::customContextMenuRequested() signal.

enum Qt::CoordinateSystem

This enum specifies the coordinate system.

Constant Value Description
Qt::DeviceCoordinates 0 Coordinates are relative to the top-left corner of the object's paint device.
Qt::LogicalCoordinates 1 Coordinates are relative to the top-left corner of the object.

This enum was introduced or modified in Qt 4.6.

enum Qt::Corner

This enum type specifies a corner in a rectangle:

Constant Value Description
Qt::TopLeftCorner 0x00000 The top-left corner of the rectangle.
Qt::TopRightCorner 0x00001 The top-right corner of the rectangle.
Qt::BottomLeftCorner 0x00002 The bottom-left corner of the rectangle.
Qt::BottomRightCorner 0x00003 The bottom-right corner of the rectangle.

enum Qt::CursorMoveStyle

This enum describes the movement style available to text cursors. The options are:

Constant Value Description
Qt::LogicalMoveStyle 0 Within a left-to-right text block, decrease cursor position when pressing left arrow key, increase cursor position when pressing the right arrow key. If the text block is right-to-left, the opposite behavior applies.
Qt::VisualMoveStyle 1 Pressing the left arrow key will always cause the cursor to move left, regardless of the text's writing direction. Pressing the right arrow key will always cause the cursor to move right.

enum Qt::CursorShape

This enum type defines the various cursors that can be used.

The standard arrow cursor is the default for widgets in a normal state.

Constant Value Description
Qt::ArrowCursor 0 The standard arrow cursor.
Qt::UpArrowCursor 1 An arrow pointing upwards toward the top of the screen.
Qt::CrossCursor 2 A crosshair cursor, typically used to help the user accurately select a point on the screen.
Qt::WaitCursor 3 An hourglass or watch cursor, usually shown during operations that prevent the user from interacting with the application.
Qt::IBeamCursor 4 A caret or ibeam cursor, indicating that a widget can accept and display text input.
Qt::SizeVerCursor 5 A cursor used for elements that are used to vertically resize top-level windows.
Qt::SizeHorCursor 6 A cursor used for elements that are used to horizontally resize top-level windows.
Qt::SizeBDiagCursor 7 A cursor used for elements that are used to diagonally resize top-level windows at their top-right and bottom-left corners.
Qt::SizeFDiagCursor 8 A cursor used for elements that are used to diagonally resize top-level windows at their top-left and bottom-right corners.
Qt::SizeAllCursor 9 A cursor used for elements that are used to resize top-level windows in any direction.
Qt::BlankCursor 10 A blank/invisible cursor, typically used when the cursor shape needs to be hidden.
Qt::SplitVCursor 11 A cursor used for vertical splitters, indicating that a handle can be dragged horizontally to adjust the use of available space.
Qt::SplitHCursor 12 A cursor used for horizontal splitters, indicating that a handle can be dragged vertically to adjust the use of available space.
Qt::PointingHandCursor 13 A pointing hand cursor that is typically used for clickable elements such as hyperlinks.
Qt::ForbiddenCursor 14 A slashed circle cursor, typically used during drag and drop operations to indicate that dragged content cannot be dropped on particular widgets or inside certain regions.
Qt::OpenHandCursor 17 A cursor representing an open hand, typically used to indicate that the area under the cursor is the visible part of a canvas that the user can click and drag in order to scroll around.
Qt::ClosedHandCursor 18 A cursor representing a closed hand, typically used to indicate that a dragging operation is in progress that involves scrolling.
Qt::WhatsThisCursor 15 An arrow with a question mark, typically used to indicate the presence of What's This? help for a widget.
Qt::BusyCursor 16 An hourglass or watch cursor, usually shown during operations that allow the user to interact with the application while they are performed in the background.
Qt::DragMoveCursor 20 A cursor that is usually used when dragging an item.
Qt::DragCopyCursor 19 A cursor that is usually used when dragging an item to copy it.
Qt::DragLinkCursor 21 A cursor that is usually used when dragging an item to make a link to it.
Qt::BitmapCursor 24  

enum Qt::DateFormat

Constant Value Description
Qt::TextDate 0 The default Qt format, which includes the day and month name, the day number in the month, and the year in full. The day and month names will be short, localized names. This is basically equivalent to using the date format string, "ddd MMM d yyyy". See QDate::toString() for more information.
Qt::ISODate 1 ISO 8601 extended format: either yyyy-MM-dd for dates or yyyy-MM-ddTHH:mm:ss (e.g. 2017-07-24T15:46:29), or with a time-zone suffix (Z for UTC otherwise an offset as [+|-]HH:mm) where appropriate for combined dates and times.
Qt::ISODateWithMs 9 ISO 8601 extended format, including milliseconds if applicable.
Qt::SystemLocaleShortDate 4 The short format used by the operating system.
Qt::SystemLocaleLongDate 5 The long format used by the operating system.
Qt::DefaultLocaleShortDate 6 The short format specified by the application's locale.
Qt::DefaultLocaleLongDate 7 The long format used by the application's locale.
Qt::SystemLocaleDate 2 This enum value is deprecated. Use Qt::SystemLocaleShortDate instead (or Qt::SystemLocaleLongDate if you want long dates).
Qt::LocaleDate 3 This enum value is deprecated. Use Qt::DefaultLocaleShortDate instead (or Qt::DefaultLocaleLongDate if you want long dates).
Qt::LocalDate SystemLocaleDate This enum value is deprecated. Use Qt::SystemLocaleShortDate instead (or Qt::SystemLocaleLongDate if you want long dates).
Qt::RFC2822Date 8 RFC 2822, RFC 850 and RFC 1036 format: either [ddd,] dd MMM yyyy hh:mm[:ss] +/-TZ or ddd MMM dd yyyy hh:mm[:ss] +/-TZ for combined dates and times.

Note: For ISODate formats, each Y, M and D represents a single digit of the year, month and day used to specify the date. Each H, M and S represents a single digit of the hour, minute and second used to specify the time. The presence of a literal T character is used to separate the date and time when both are specified.

enum Qt::DayOfWeek

Constant Value
Qt::Monday 1
Qt::Tuesday 2
Qt::Wednesday 3
Qt::Thursday 4
Qt::Friday 5
Qt::Saturday 6
Qt::Sunday 7

enum Qt::DockWidgetArea
flags Qt::DockWidgetAreas

Constant Value
Qt::LeftDockWidgetArea 0x1
Qt::RightDockWidgetArea 0x2
Qt::TopDockWidgetArea 0x4
Qt::BottomDockWidgetArea 0x8
Qt::AllDockWidgetAreas DockWidgetArea_Mask
Qt::NoDockWidgetArea 0

The DockWidgetAreas type is a typedef for QFlags<DockWidgetArea>. It stores an OR combination of DockWidgetArea values.

enum Qt::DropAction
flags Qt::DropActions

Constant Value Description
Qt::CopyAction 0x1 Copy the data to the target.
Qt::MoveAction 0x2 Move the data from the source to the target.
Qt::LinkAction 0x4 Create a link from the source to the target.
Qt::ActionMask 0xff  
Qt::IgnoreAction 0x0 Ignore the action (do nothing with the data).
Qt::TargetMoveAction 0x8002 On Windows, this value is used when the ownership of the D&D data should be taken over by the target application, i.e., the source application should not delete the data. On X11 this value is used to do a move. TargetMoveAction is not used on the Mac.

The DropActions type is a typedef for QFlags<DropAction>. It stores an OR combination of DropAction values.

enum Qt::Edge
flags Qt::Edges

This enum type specifies an edge in a rectangle:

Constant Value Description
Qt::TopEdge 0x00001 The top edge of the rectangle.
Qt::LeftEdge 0x00002 The left edge of the rectangle.
Qt::RightEdge 0x00004 The right edge of the rectangle.
Qt::BottomEdge 0x00008 The bottom edge of the rectangle.

This enum was introduced or modified in Qt 5.1.

The Edges type is a typedef for QFlags<Edge>. It stores an OR combination of Edge values.

enum Qt::EnterKeyType

This can be used to alter the appearance of the Return key on an on-screen keyboard.

Note: Not all of these values are supported on all platforms. For unsupported values the default key will be used instead.

Constant Value Description
Qt::EnterKeyDefault 0 The default Enter key. This can either be a button closing the keyboard, or a Return button causing a new line in case of a multi-line input field.
Qt::EnterKeyReturn 1 Show a Return button that inserts a new line. The keyboard will not close when this button is pressed.
Qt::EnterKeyDone 2 Show a "Done" button. The keyboard will close when this button is pressed.
Qt::EnterKeyGo 3 Show a "Go" button. Typically used in an address bar when entering a URL; the keyboard will close when this button is pressed.
Qt::EnterKeySend 4 Show a "Send" button. The keyboard will close when this button is pressed.
Qt::EnterKeySearch 5 Show a "Search" button. The keyboard will close when this button is pressed.
Qt::EnterKeyNext 6 Show a "Next" button. Typically used in a form to allow navigating to the next input field; the keyboard will not close when this button is pressed.
Qt::EnterKeyPrevious 7 Show a "Previous" button. The keyboard will not close when this button is pressed.

This enum was introduced or modified in Qt 5.6.

enum Qt::EventPriority

This enum can be used to specify event priorities.

Constant Value Description
Qt::HighEventPriority 1 Events with this priority are sent before events with NormalEventPriority or LowEventPriority.
Qt::NormalEventPriority 0 Events with this priority are sent after events with HighEventPriority, but before events with LowEventPriority.
Qt::LowEventPriority -1 Events with this priority are sent after events with HighEventPriority or NormalEventPriority.

Note that these values are provided purely for convenience, since event priorities can be any value between INT_MAX and INT_MIN, inclusive. For example, you can define custom priorities as being relative to each other:

enum CustomEventPriority
{
    // An important event
    ImportantEventPriority = Qt::HighEventPriority,

    // A more important event
    MoreImportantEventPriority = ImportantEventPriority + 1,

    // A critical event
    CriticalEventPriority = 100 * MoreImportantEventPriority,

    // Not that important
    StatusEventPriority = Qt::LowEventPriority,

    // These are less important than Status events
    IdleProcessingDoneEventPriority = StatusEventPriority - 1
};

See also QCoreApplication::postEvent().

enum Qt::FillRule

Specifies which method should be used to fill the paths and polygons.

Constant Value Description
Qt::OddEvenFill 0 Specifies that the region is filled using the odd even fill rule. With this rule, we determine whether a point is inside the shape by using the following method. Draw a horizontal line from the point to a location outside the shape, and count the number of intersections. If the number of intersections is an odd number, the point is inside the shape. This mode is the default.
Qt::WindingFill 1 Specifies that the region is filled using the non zero winding rule. With this rule, we determine whether a point is inside the shape by using the following method. Draw a horizontal line from the point to a location outside the shape. Determine whether the direction of the line at each intersection point is up or down. The winding number is determined by summing the direction of each intersection. If the number is non zero, the point is inside the shape. This fill mode can also in most cases be considered as the intersection of closed shapes.

enum Qt::FindChildOption
flags Qt::FindChildOptions

Constant Value Description
Qt::FindDirectChildrenOnly 0x0 Looks only at the direct children of the object.
Qt::FindChildrenRecursively 0x1 Looks at all children of the object (recursive search).

The FindChildOptions type is a typedef for QFlags<FindChildOption>. It stores an OR combination of FindChildOption values.

enum Qt::FocusPolicy

This enum type defines the various policies a widget can have with respect to acquiring keyboard focus.

Constant Value Description
Qt::TabFocus 0x1 the widget accepts focus by tabbing.
Qt::ClickFocus 0x2 the widget accepts focus by clicking.
Qt::StrongFocus TabFocus | ClickFocus | 0x8 the widget accepts focus by both tabbing and clicking. On macOS this will also be indicate that the widget accepts tab focus when in 'Text/List focus mode'.
Qt::WheelFocus StrongFocus | 0x4 like Qt::StrongFocus plus the widget accepts focus by using the mouse wheel.
Qt::NoFocus 0 the widget does not accept focus.

enum Qt::FocusReason

This enum specifies why the focus changed. It will be passed through QWidget::setFocus and can be retrieved in the QFocusEvent sent to the widget upon focus change.

Constant Value Description
Qt::MouseFocusReason 0 A mouse action occurred.
Qt::TabFocusReason 1 The Tab key was pressed.
Qt::BacktabFocusReason 2 A Backtab occurred. The input for this may include the Shift or Control keys; e.g. Shift+Tab.
Qt::ActiveWindowFocusReason 3 The window system made this window either active or inactive.
Qt::PopupFocusReason 4 The application opened/closed a pop-up that grabbed/released the keyboard focus.
Qt::ShortcutFocusReason 5 The user typed a label's buddy shortcut
Qt::MenuBarFocusReason 6 The menu bar took focus.
Qt::OtherFocusReason 7 Another reason, usually application-specific.

See also Keyboard Focus in Widgets.

enum Qt::GestureFlag
flags Qt::GestureFlags

This enum type describes additional flags that can be used when subscribing to a gesture.

Constant Value Description
Qt::DontStartGestureOnChildren 0x01 By default gestures can start on the widget or over any of its children. Use this flag to disable this and allow a gesture to start on the widget only.
Qt::ReceivePartialGestures 0x02 Allows any ignored gesture events to be propagated to parent widgets which have specified this hint. By default only gestures that are in the Qt::GestureStarted state are propagated and the widget always gets the full gesture sequence starting with a gesture in the Qt::GestureStarted state and ending with a gesture in the Qt::GestureFinished or Qt::GestureCanceled states.
Qt::IgnoredGesturesPropagateToParent 0x04 Since Qt 4.7, this flag allows you to fine-tune gesture event propagation. By setting the flag when grabbing a gesture all ignored partial gestures will propagate to their parent items.

This enum was introduced or modified in Qt 4.6.

The GestureFlags type is a typedef for QFlags<GestureFlag>. It stores an OR combination of GestureFlag values.

See also QWidget::grabGesture() and QGraphicsObject::grabGesture().

enum Qt::GestureState

This enum type describes the state of a gesture.

Constant Value Description
Qt::NoGesture 0 No gesture has been detected.
Qt::GestureStarted 1 A continuous gesture has started.
Qt::GestureUpdated 2 A gesture continues.
Qt::GestureFinished 3 A gesture has finished.
Qt::GestureCanceled 4 A gesture was canceled.

This enum was introduced or modified in Qt 4.6.

See also QGesture.

enum Qt::GestureType

This enum type describes the standard gestures.

Constant Value Description
Qt::TapGesture 1 A Tap gesture.
Qt::TapAndHoldGesture 2 A Tap-And-Hold (Long-Tap) gesture.
Qt::PanGesture 3 A Pan gesture.
Qt::PinchGesture 4 A Pinch gesture.
Qt::SwipeGesture 5 A Swipe gesture.
Qt::CustomGesture 0x0100 A flag that can be used to test if the gesture is a user-defined gesture ID.

User-defined gestures are registered with the QGestureRecognizer::registerRecognizer() function which generates a custom gesture ID with the Qt::CustomGesture flag set.

This enum was introduced or modified in Qt 4.6.

See also QGesture, QWidget::grabGesture(), and QGraphicsObject::grabGesture().

enum Qt::GlobalColor

Qt's predefined QColor objects:

Constant Value Description
Qt::white 3 White (#ffffff)
Qt::black 2 Black (#000000)
Qt::red 7 Red (#ff0000)
Qt::darkRed 13 Dark red (#800000)
Qt::green 8 Green (#00ff00)
Qt::darkGreen 14 Dark green (#008000)
Qt::blue 9 Blue (#0000ff)
Qt::darkBlue 15 Dark blue (#000080)
Qt::cyan 10 Cyan (#00ffff)
Qt::darkCyan 16 Dark cyan (#008080)
Qt::magenta 11 Magenta (#ff00ff)
Qt::darkMagenta 17 Dark magenta (#800080)
Qt::yellow 12 Yellow (#ffff00)
Qt::darkYellow 18 Dark yellow (#808000)
Qt::gray 5 Gray (#a0a0a4)
Qt::darkGray 4 Dark gray (#808080)
Qt::lightGray 6 Light gray (#c0c0c0)
Qt::transparent 19 a transparent black value (i.e., QColor(0, 0, 0, 0))
Qt::color0 0 0 pixel value (for bitmaps)
Qt::color1 1 1 pixel value (for bitmaps)

See also QColor.

typedef Qt::HANDLE

A handle type for system objects, defined as void * on all platforms.

enum Qt::HitTestAccuracy

This enum contains the types of accuracy that can be used by the QTextDocument class when testing for mouse clicks on text documents.

Constant Value Description
Qt::ExactHit 0 The point at which input occurred must coincide exactly with input-sensitive parts of the document.
Qt::FuzzyHit 1 The point at which input occurred can lie close to input-sensitive parts of the document.

enum Qt::ImageConversionFlag
flags Qt::ImageConversionFlags

The options marked "(default)" are set if no other values from the list are included (since the defaults are zero):

Color/Mono preference (ignored for QBitmap):

Constant Value Description
Qt::AutoColor 0x00000000 (default) - If the image has depth 1 and contains only black and white pixels, the pixmap becomes monochrome.
Qt::ColorOnly 0x00000003 The pixmap is dithered/converted to the native display depth.
Qt::MonoOnly 0x00000002 The pixmap becomes monochrome. If necessary, it is dithered using the chosen dithering algorithm.

Dithering mode preference:

Constant Value Description
Qt::DiffuseDither 0x00000000 (default) - A high-quality dither using error diffusion.
Qt::OrderedDither 0x00000010 A faster, ordered dither.
Qt::ThresholdDither 0x00000020 No dithering; closest color is used.

Dithering mode preference for 1-bit alpha masks:

Constant Value Description
Qt::ThresholdAlphaDither 0x00000000 (default) - No dithering.
Qt::OrderedAlphaDither 0x00000004 A faster, ordered dither.
Qt::DiffuseAlphaDither 0x00000008 A high-quality dither using error diffusion.

Color matching versus dithering preference:

Constant Value Description
Qt::PreferDither 0x00000040 Always dither images when converting to smaller color-spaces.
Qt::AvoidDither 0x00000080 Only dither to indexed formats if the source image uses more different colors than the size of the color table of the destination format.
Qt::AutoDither 0x00000000 (default) - Only dither when down-converting to 1 or 8-bit indexed formats.
Qt::NoOpaqueDetection 0x00000100 Do not check whether the image contains non-opaque pixels. Use this if you know that the image is semi-transparent and you want to avoid the overhead of checking the pixels in the image until a non-opaque pixel is found, or if you want the pixmap to retain an alpha channel for some other reason. If the image has no alpha channel this flag has no effect.
Qt::NoFormatConversion 0x00000200 Don't do any format conversions on the image. Can be useful when converting a QImage to a QPixmap for a one-time rendering operation for example. Note that a QPixmap not in the preferred format will be much slower as a paint device.

The ImageConversionFlags type is a typedef for QFlags<ImageConversionFlag>. It stores an OR combination of ImageConversionFlag values.

enum Qt::InputMethodHint
flags Qt::InputMethodHints

Constant Value Description
Qt::ImhNone 0x0 No hints.

Flags that alter the behavior:

Constant Value Description
Qt::ImhHiddenText 0x1 The input method should not show the characters while typing. This is automatically set when setting QLineEdit::echoMode to Password. Note that setting ImhHiddenText does not change the echo mode.
Qt::ImhSensitiveData 0x2 Typed text should not be stored by the active input method in any persistent storage like predictive user dictionary.
Qt::ImhNoAutoUppercase 0x4 The input method should not try to automatically switch to upper case when a sentence ends.
Qt::ImhPreferNumbers 0x8 Numbers are preferred (but not required).
Qt::ImhPreferUppercase 0x10 Upper case letters are preferred (but not required).
Qt::ImhPreferLowercase 0x20 Lower case letters are preferred (but not required).
Qt::ImhNoPredictiveText 0x40 Do not use predictive text (i.e. dictionary lookup) while typing.
Qt::ImhDate 0x80 The text editor functions as a date field.
Qt::ImhTime 0x100 The text editor functions as a time field.
Qt::ImhPreferLatin 0x200 Latin characters are preferred (but not required).
Qt::ImhMultiLine 0x400 Multiple lines can be entered into the text field.
Qt::ImhNoEditMenu 0x800 Do not use built-in edit menu. This flag was introduced in Qt 5.11.
Qt::ImhNoTextHandles 0x1000 Do not use built-in text cursor and selection handles. This flag was introduced in Qt 5.11.

Flags that restrict input (exclusive flags):

Constant Value Description
Qt::ImhDigitsOnly 0x10000 Only digits are allowed.
Qt::ImhFormattedNumbersOnly 0x20000 Only number input is allowed. This includes decimal point and minus sign.
Qt::ImhUppercaseOnly 0x40000 Only upper case letter input is allowed.
Qt::ImhLowercaseOnly 0x80000 Only lower case letter input is allowed.
Qt::ImhDialableCharactersOnly 0x100000 Only characters suitable for phone dialing are allowed.
Qt::ImhEmailCharactersOnly 0x200000 Only characters suitable for email addresses are allowed.
Qt::ImhUrlCharactersOnly 0x400000 Only characters suitable for URLs are allowed.
Qt::ImhLatinOnly 0x800000 Only latin based input is allowed.

Masks:

Constant Value Description
Qt::ImhExclusiveInputMask 0xffff0000 This mask yields nonzero if any of the exclusive flags are used.

Note: If several exclusive flags are OR-ed together, the resulting character set will consist of the union of the specified sets. For instance specifying ImhNumbersOnly and ImhUppercaseOnly would yield a set consisting of numbers and uppercase letters.

The InputMethodHints type is a typedef for QFlags<InputMethodHint>. It stores an OR combination of InputMethodHint values.

See also QGraphicsItem::inputMethodHints().

enum Qt::InputMethodQuery
flags Qt::InputMethodQueries

Constant Value Description
Qt::ImEnabled 0x1 The widget accepts input method input.
Qt::ImMicroFocus 0x2 This query is obsolete. Use ImCursorRectangle instead.
Qt::ImCursorRectangle 0x2 The rectangle covering the area of the input cursor in widget coordinates.
Qt::ImFont 0x4 The currently used font for text input.
Qt::ImCursorPosition 0x8 The logical position of the cursor within the text surrounding the input area (see ImSurroundingText).
Qt::ImSurroundingText 0x10 The plain text around the input area, for example the current paragraph.
Qt::ImCurrentSelection 0x20 The currently selected text.
Qt::ImMaximumTextLength 0x40 The maximum number of characters that the widget can hold. If there is no limit, QVariant::QVariant() is returned.
Qt::ImAnchorPosition 0x80 The position of the selection anchor. This may be less or greater than ImCursorPosition, depending on which side of selection the cursor is. If there is no selection, it returns the same as ImCursorPosition.
Qt::ImHints 0x100 The hints for input method on expected input. (See Qt::InputMethodHints)
Qt::ImPreferredLanguage 0x200 The preferred input language.
Qt::ImPlatformData 0x80000000 Platform specific data for input method.
Qt::ImAbsolutePosition 0x400 The logical position of the cursor within the entire document.
Qt::ImTextBeforeCursor 0x800 The plain text before the cursor. The widget can decide how much text to return, but must not return an empty string unless the cursor is at the start of the document.
Qt::ImTextAfterCursor 0x1000 The plain text after the cursor. The widget can decide how much text to return, but must not return an empty string unless the cursor is at the end of the document.
Qt::ImEnterKeyType 0x2000 The Enter key type.
Qt::ImAnchorRectangle 0x4000 The bounding rectangle of the selection anchor. This value was added in Qt 5.7.
Qt::ImInputItemClipRectangle 0x8000 The actual exposed input item rectangle. Parts of the input item might be clipped. This value will take clipping into consideration and return the actual painted item rectangle. The rectangle is in widget coordinates.

Masks:

Constant Value Description
Qt::ImQueryInput ImCursorRectangle | ImCursorPosition | ImSurroundingText | ImCurrentSelection | ImAnchorRectangle | ImAnchorPosition Commonly changed properties on input.
Qt::ImQueryAll 0xffffffff Query for all input method properties.

The InputMethodQueries type is a typedef for QFlags<InputMethodQuery>. It stores an OR combination of InputMethodQuery values.

See also QInputMethodQueryEvent.

enum Qt::ItemDataRole

Each item in the model has a set of data elements associated with it, each with its own role. The roles are used by the view to indicate to the model which type of data it needs. Custom models should return data in these types.

The general purpose roles (and the associated types) are:

Constant Value Description
Qt::DisplayRole 0 The key data to be rendered in the form of text. (QString)
Qt::DecorationRole 1 The data to be rendered as a decoration in the form of an icon. (QColor, QIcon or QPixmap)
Qt::EditRole 2 The data in a form suitable for editing in an editor. (QString)
Qt::ToolTipRole 3 The data displayed in the item's tooltip. (QString)
Qt::StatusTipRole 4 The data displayed in the status bar. (QString)
Qt::WhatsThisRole 5 The data displayed for the item in "What's This?" mode. (QString)
Qt::SizeHintRole 13 The size hint for the item that will be supplied to views. (QSize)

Roles describing appearance and meta data (with associated types):

Constant Value Description
Qt::FontRole 6 The font used for items rendered with the default delegate. (QFont)
Qt::TextAlignmentRole 7 The alignment of the text for items rendered with the default delegate. (Qt::Alignment)
Qt::BackgroundRole 8 The background brush used for items rendered with the default delegate. (QBrush)
Qt::BackgroundColorRole 8 This role is obsolete. Use BackgroundRole instead.
Qt::ForegroundRole 9 The foreground brush (text color, typically) used for items rendered with the default delegate. (QBrush)
Qt::TextColorRole 9 This role is obsolete. Use ForegroundRole instead.
Qt::CheckStateRole 10 This role is used to obtain the checked state of an item. (Qt::CheckState)
Qt::InitialSortOrderRole 14 This role is used to obtain the initial sort order of a header view section. (Qt::SortOrder). This role was introduced in Qt 4.8.

Accessibility roles (with associated types):

Constant Value Description
Qt::AccessibleTextRole 11 The text to be used by accessibility extensions and plugins, such as screen readers. (QString)
Qt::AccessibleDescriptionRole 12 A description of the item for accessibility purposes. (QString)

User roles:

Constant Value Description
Qt::UserRole 0x0100 The first role that can be used for application-specific purposes.

For user roles, it is up to the developer to decide which types to use and ensure that components use the correct types when accessing and setting data.

enum Qt::ItemFlag
flags Qt::ItemFlags

This enum describes the properties of an item:

Constant Value Description
Qt::NoItemFlags 0 It does not have any properties set.
Qt::ItemIsSelectable 1 It can be selected.
Qt::ItemIsEditable 2 It can be edited.
Qt::ItemIsDragEnabled 4 It can be dragged.
Qt::ItemIsDropEnabled 8 It can be used as a drop target.
Qt::ItemIsUserCheckable 16 It can be checked or unchecked by the user.
Qt::ItemIsEnabled 32 The user can interact with the item.
Qt::ItemIsAutoTristate 64 The item's state depends on the state of its children. This enables automatic management of the state of parent items in QTreeWidget (checked if all children are checked, unchecked if all children are unchecked, or partially checked if only some children are checked).
Qt::ItemIsTristate ItemIsAutoTristate This enum value is deprecated. Use Qt::ItemIsAutoTristate instead.
Qt::ItemNeverHasChildren 128 The item never has child items. This is used for optimization purposes only.
Qt::ItemIsUserTristate 256 The user can cycle through three separate states. This value was added in Qt 5.5.

Note that checkable items need to be given both a suitable set of flags and an initial state, indicating whether the item is checked or not. This is handled automatically for model/view components, but needs to be explicitly set for instances of QListWidgetItem, QTableWidgetItem, and QTreeWidgetItem.

Note that it is undefined behavior to reimplement QAbstractItemModel::hasChildren to return true for an index if that index has the Qt::ItemNeverHasChildren flag set.

The ItemFlags type is a typedef for QFlags<ItemFlag>. It stores an OR combination of ItemFlag values.

See also QAbstractItemModel.

enum Qt::ItemSelectionMode

This enum is used in QGraphicsItem, QGraphicsScene and QGraphicsView to specify how items are selected, or how to determine if shapes and items collide.

Constant Value Description
Qt::ContainsItemShape 0x0 The output list contains only items whose shape is fully contained inside the selection area. Items that intersect with the area's outline are not included.
Qt::IntersectsItemShape 0x1 The output list contains both items whose shape is fully contained inside the selection area, and items that intersect with the area's outline. This is a common mode for rubber band selection.
Qt::ContainsItemBoundingRect 0x2 The output list contains only items whose bounding rectangle is fully contained inside the selection area. Items that intersect with the area's outline are not included.
Qt::IntersectsItemBoundingRect 0x3 The output list contains both items whose bounding rectangle is fully contained inside the selection area, and items that intersect with the area's outline. This method is commonly used for determining areas that need redrawing.

See also QGraphicsScene::items(), QGraphicsScene::collidingItems(), QGraphicsView::items(), QGraphicsItem::collidesWithItem(), and QGraphicsItem::collidesWithPath().

enum Qt::ItemSelectionOperation

This enum is used in QGraphicsScene to specify what to do with currently selected items when setting a selection area.

Constant Value Description
Qt::ReplaceSelection 0 The currently selected items are replaced by items in the selection area.
Qt::AddToSelection 1 The items in the selection area are added to the currently selected items.

See also QGraphicsScene::setSelectionArea().

enum Qt::Key

The key names used by Qt.

Constant Value Description
Qt::Key_Escape 0x01000000  
Qt::Key_Tab 0x01000001  
Qt::Key_Backtab 0x01000002  
Qt::Key_Backspace 0x01000003  
Qt::Key_Return 0x01000004  
Qt::Key_Enter 0x01000005 Typically located on the keypad.
Qt::Key_Insert 0x01000006  
Qt::Key_Delete 0x01000007  
Qt::Key_Pause 0x01000008 The Pause/Break key (Note: Not related to pausing media)
Qt::Key_Print 0x01000009  
Qt::Key_SysReq 0x0100000a  
Qt::Key_Clear 0x0100000b Corresponds to the Clear key on selected Apple keyboard models. On other systems it is commonly mapped to the numeric keypad key 5, when Num Lock is off.
Qt::Key_Home 0x01000010  
Qt::Key_End 0x01000011  
Qt::Key_Left 0x01000012  
Qt::Key_Up 0x01000013  
Qt::Key_Right 0x01000014  
Qt::Key_Down 0x01000015  
Qt::Key_PageUp 0x01000016  
Qt::Key_PageDown 0x01000017  
Qt::Key_Shift 0x01000020  
Qt::Key_Control 0x01000021 On macOS, this corresponds to the Command keys.
Qt::Key_Meta 0x01000022 On macOS, this corresponds to the Control keys. On Windows keyboards, this key is mapped to the Windows key.
Qt::Key_Alt 0x01000023  
Qt::Key_AltGr 0x01001103 On Windows, when the KeyDown event for this key is sent, the Ctrl+Alt modifiers are also set.
Qt::Key_CapsLock 0x01000024  
Qt::Key_NumLock 0x01000025  
Qt::Key_ScrollLock 0x01000026  
Qt::Key_F1 0x01000030  
Qt::Key_F2 0x01000031  
Qt::Key_F3 0x01000032  
Qt::Key_F4 0x01000033  
Qt::Key_F5 0x01000034  
Qt::Key_F6 0x01000035  
Qt::Key_F7 0x01000036  
Qt::Key_F8 0x01000037  
Qt::Key_F9 0x01000038  
Qt::Key_F10 0x01000039  
Qt::Key_F11 0x0100003a  
Qt::Key_F12 0x0100003b  
Qt::Key_F13 0x0100003c  
Qt::Key_F14 0x0100003d  
Qt::Key_F15 0x0100003e  
Qt::Key_F16 0x0100003f  
Qt::Key_F17 0x01000040  
Qt::Key_F18 0x01000041  
Qt::Key_F19 0x01000042  
Qt::Key_F20 0x01000043  
Qt::Key_F21 0x01000044  
Qt::Key_F22 0x01000045  
Qt::Key_F23 0x01000046  
Qt::Key_F24 0x01000047  
Qt::Key_F25 0x01000048  
Qt::Key_F26 0x01000049  
Qt::Key_F27 0x0100004a  
Qt::Key_F28 0x0100004b  
Qt::Key_F29 0x0100004c  
Qt::Key_F30 0x0100004d  
Qt::Key_F31 0x0100004e  
Qt::Key_F32 0x0100004f  
Qt::Key_F33 0x01000050  
Qt::Key_F34 0x01000051  
Qt::Key_F35 0x01000052  
Qt::Key_Super_L 0x01000053  
Qt::Key_Super_R 0x01000054  
Qt::Key_Menu 0x01000055  
Qt::Key_Hyper_L 0x01000056  
Qt::Key_Hyper_R 0x01000057  
Qt::Key_Help 0x01000058  
Qt::Key_Direction_L 0x01000059  
Qt::Key_Direction_R 0x01000060  
Qt::Key_Space 0x20  
Qt::Key_Any Key_Space  
Qt::Key_Exclam 0x21  
Qt::Key_QuoteDbl 0x22  
Qt::Key_NumberSign 0x23  
Qt::Key_Dollar 0x24  
Qt::Key_Percent 0x25  
Qt::Key_Ampersand 0x26  
Qt::Key_Apostrophe 0x27  
Qt::Key_ParenLeft 0x28  
Qt::Key_ParenRight 0x29  
Qt::Key_Asterisk 0x2a  
Qt::Key_Plus 0x2b  
Qt::Key_Comma 0x2c  
Qt::Key_Minus 0x2d  
Qt::Key_Period 0x2e  
Qt::Key_Slash 0x2f  
Qt::Key_0 0x30  
Qt::Key_1 0x31  
Qt::Key_2 0x32  
Qt::Key_3 0x33  
Qt::Key_4 0x34  
Qt::Key_5 0x35  
Qt::Key_6 0x36  
Qt::Key_7 0x37  
Qt::Key_8 0x38  
Qt::Key_9 0x39  
Qt::Key_Colon 0x3a  
Qt::Key_Semicolon 0x3b  
Qt::Key_Less 0x3c  
Qt::Key_Equal 0x3d  
Qt::Key_Greater 0x3e  
Qt::Key_Question 0x3f  
Qt::Key_At 0x40  
Qt::Key_A 0x41  
Qt::Key_B 0x42  
Qt::Key_C 0x43  
Qt::Key_D 0x44  
Qt::Key_E 0x45  
Qt::Key_F 0x46  
Qt::Key_G 0x47  
Qt::Key_H 0x48  
Qt::Key_I 0x49  
Qt::Key_J 0x4a  
Qt::Key_K 0x4b  
Qt::Key_L 0x4c  
Qt::Key_M 0x4d  
Qt::Key_N 0x4e  
Qt::Key_O 0x4f  
Qt::Key_P 0x50  
Qt::Key_Q 0x51  
Qt::Key_R 0x52  
Qt::Key_S 0x53  
Qt::Key_T 0x54  
Qt::Key_U 0x55  
Qt::Key_V 0x56  
Qt::Key_W 0x57  
Qt::Key_X 0x58  
Qt::Key_Y 0x59  
Qt::Key_Z 0x5a  
Qt::Key_BracketLeft 0x5b  
Qt::Key_Backslash 0x5c  
Qt::Key_BracketRight 0x5d  
Qt::Key_AsciiCircum 0x5e  
Qt::Key_Underscore 0x5f  
Qt::Key_QuoteLeft 0x60  
Qt::Key_BraceLeft 0x7b  
Qt::Key_Bar 0x7c  
Qt::Key_BraceRight 0x7d  
Qt::Key_AsciiTilde 0x7e  
Qt::Key_nobreakspace 0x0a0  
Qt::Key_exclamdown 0x0a1  
Qt::Key_cent 0x0a2  
Qt::Key_sterling 0x0a3  
Qt::Key_currency 0x0a4  
Qt::Key_yen 0x0a5  
Qt::Key_brokenbar 0x0a6  
Qt::Key_section 0x0a7  
Qt::Key_diaeresis 0x0a8  
Qt::Key_copyright 0x0a9  
Qt::Key_ordfeminine 0x0aa  
Qt::Key_guillemotleft 0x0ab  
Qt::Key_notsign 0x0ac  
Qt::Key_hyphen 0x0ad  
Qt::Key_registered 0x0ae  
Qt::Key_macron 0x0af  
Qt::Key_degree 0x0b0  
Qt::Key_plusminus 0x0b1  
Qt::Key_twosuperior 0x0b2  
Qt::Key_threesuperior 0x0b3  
Qt::Key_acute 0x0b4  
Qt::Key_mu 0x0b5  
Qt::Key_paragraph 0x0b6  
Qt::Key_periodcentered 0x0b7  
Qt::Key_cedilla 0x0b8  
Qt::Key_onesuperior 0x0b9  
Qt::Key_masculine 0x0ba  
Qt::Key_guillemotright 0x0bb  
Qt::Key_onequarter 0x0bc  
Qt::Key_onehalf 0x0bd  
Qt::Key_threequarters 0x0be  
Qt::Key_questiondown 0x0bf  
Qt::Key_Agrave 0x0c0  
Qt::Key_Aacute 0x0c1  
Qt::Key_Acircumflex 0x0c2  
Qt::Key_Atilde 0x0c3  
Qt::Key_Adiaeresis 0x0c4  
Qt::Key_Aring 0x0c5  
Qt::Key_AE 0x0c6  
Qt::Key_Ccedilla 0x0c7  
Qt::Key_Egrave 0x0c8  
Qt::Key_Eacute 0x0c9  
Qt::Key_Ecircumflex 0x0ca  
Qt::Key_Ediaeresis 0x0cb  
Qt::Key_Igrave 0x0cc  
Qt::Key_Iacute 0x0cd  
Qt::Key_Icircumflex 0x0ce  
Qt::Key_Idiaeresis 0x0cf  
Qt::Key_ETH 0x0d0  
Qt::Key_Ntilde 0x0d1  
Qt::Key_Ograve 0x0d2  
Qt::Key_Oacute 0x0d3  
Qt::Key_Ocircumflex 0x0d4  
Qt::Key_Otilde 0x0d5  
Qt::Key_Odiaeresis 0x0d6  
Qt::Key_multiply 0x0d7  
Qt::Key_Ooblique 0x0d8  
Qt::Key_Ugrave 0x0d9  
Qt::Key_Uacute 0x0da  
Qt::Key_Ucircumflex 0x0db  
Qt::Key_Udiaeresis 0x0dc  
Qt::Key_Yacute 0x0dd  
Qt::Key_THORN 0x0de  
Qt::Key_ssharp 0x0df  
Qt::Key_division 0x0f7  
Qt::Key_ydiaeresis 0x0ff  
Qt::Key_Multi_key 0x01001120  
Qt::Key_Codeinput 0x01001137  
Qt::Key_SingleCandidate 0x0100113c  
Qt::Key_MultipleCandidate 0x0100113d  
Qt::Key_PreviousCandidate 0x0100113e  
Qt::Key_Mode_switch 0x0100117e  
Qt::Key_Kanji 0x01001121  
Qt::Key_Muhenkan 0x01001122  
Qt::Key_Henkan 0x01001123  
Qt::Key_Romaji 0x01001124  
Qt::Key_Hiragana 0x01001125  
Qt::Key_Katakana 0x01001126  
Qt::Key_Hiragana_Katakana 0x01001127  
Qt::Key_Zenkaku 0x01001128  
Qt::Key_Hankaku 0x01001129  
Qt::Key_Zenkaku_Hankaku 0x0100112a  
Qt::Key_Touroku 0x0100112b  
Qt::Key_Massyo 0x0100112c  
Qt::Key_Kana_Lock 0x0100112d  
Qt::Key_Kana_Shift 0x0100112e  
Qt::Key_Eisu_Shift 0x0100112f  
Qt::Key_Eisu_toggle 0x01001130  
Qt::Key_Hangul 0x01001131  
Qt::Key_Hangul_Start 0x01001132  
Qt::Key_Hangul_End 0x01001133  
Qt::Key_Hangul_Hanja 0x01001134  
Qt::Key_Hangul_Jamo 0x01001135  
Qt::Key_Hangul_Romaja 0x01001136  
Qt::Key_Hangul_Jeonja 0x01001138  
Qt::Key_Hangul_Banja 0x01001139  
Qt::Key_Hangul_PreHanja 0x0100113a  
Qt::Key_Hangul_PostHanja 0x0100113b  
Qt::Key_Hangul_Special 0x0100113f  
Qt::Key_Dead_Grave 0x01001250  
Qt::Key_Dead_Acute 0x01001251  
Qt::Key_Dead_Circumflex 0x01001252  
Qt::Key_Dead_Tilde 0x01001253  
Qt::Key_Dead_Macron 0x01001254  
Qt::Key_Dead_Breve 0x01001255  
Qt::Key_Dead_Abovedot 0x01001256  
Qt::Key_Dead_Diaeresis 0x01001257  
Qt::Key_Dead_Abovering 0x01001258  
Qt::Key_Dead_Doubleacute 0x01001259  
Qt::Key_Dead_Caron 0x0100125a  
Qt::Key_Dead_Cedilla 0x0100125b  
Qt::Key_Dead_Ogonek 0x0100125c  
Qt::Key_Dead_Iota 0x0100125d  
Qt::Key_Dead_Voiced_Sound 0x0100125e  
Qt::Key_Dead_Semivoiced_Sound 0x0100125f  
Qt::Key_Dead_Belowdot 0x01001260  
Qt::Key_Dead_Hook 0x01001261  
Qt::Key_Dead_Horn 0x01001262  
Qt::Key_Dead_Stroke 0x01001263  
Qt::Key_Dead_Abovecomma 0x01001264  
Qt::Key_Dead_Abovereversedcomma 0x01001265  
Qt::Key_Dead_Doublegrave 0x01001266  
Qt::Key_Dead_Belowring 0x01001267  
Qt::Key_Dead_Belowmacron 0x01001268  
Qt::Key_Dead_Belowcircumflex 0x01001269  
Qt::Key_Dead_Belowtilde 0x0100126a  
Qt::Key_Dead_Belowbreve 0x0100126b  
Qt::Key_Dead_Belowdiaeresis 0x0100126c  
Qt::Key_Dead_Invertedbreve 0x0100126d  
Qt::Key_Dead_Belowcomma 0x0100126e  
Qt::Key_Dead_Currency 0x0100126f  
Qt::Key_Dead_a 0x01001280  
Qt::Key_Dead_A 0x01001281  
Qt::Key_Dead_e 0x01001282  
Qt::Key_Dead_E 0x01001283  
Qt::Key_Dead_i 0x01001284  
Qt::Key_Dead_I 0x01001285  
Qt::Key_Dead_o 0x01001286  
Qt::Key_Dead_O 0x01001287  
Qt::Key_Dead_u 0x01001288  
Qt::Key_Dead_U 0x01001289  
Qt::Key_Dead_Small_Schwa 0x0100128a  
Qt::Key_Dead_Capital_Schwa 0x0100128b  
Qt::Key_Dead_Greek 0x0100128c  
Qt::Key_Dead_Lowline 0x01001290  
Qt::Key_Dead_Aboveverticalline 0x01001291  
Qt::Key_Dead_Belowverticalline 0x01001292  
Qt::Key_Dead_Longsolidusoverlay 0x01001293  
Qt::Key_Back 0x01000061  
Qt::Key_Forward 0x01000062  
Qt::Key_Stop 0x01000063  
Qt::Key_Refresh 0x01000064  
Qt::Key_VolumeDown 0x01000070  
Qt::Key_VolumeMute 0x01000071  
Qt::Key_VolumeUp 0x01000072  
Qt::Key_BassBoost 0x01000073  
Qt::Key_BassUp 0x01000074  
Qt::Key_BassDown 0x01000075  
Qt::Key_TrebleUp 0x01000076  
Qt::Key_TrebleDown 0x01000077  
Qt::Key_MediaPlay 0x01000080 A key setting the state of the media player to play
Qt::Key_MediaStop 0x01000081 A key setting the state of the media player to stop
Qt::Key_MediaPrevious 0x01000082  
Qt::Key_MediaNext 0x01000083  
Qt::Key_MediaRecord 0x01000084  
Qt::Key_MediaPause 0x1000085 A key setting the state of the media player to pause (Note: not the pause/break key)
Qt::Key_MediaTogglePlayPause 0x1000086 A key to toggle the play/pause state in the media player (rather than setting an absolute state)
Qt::Key_HomePage 0x01000090  
Qt::Key_Favorites 0x01000091  
Qt::Key_Search 0x01000092  
Qt::Key_Standby 0x01000093  
Qt::Key_OpenUrl 0x01000094  
Qt::Key_LaunchMail 0x010000a0  
Qt::Key_LaunchMedia 0x010000a1  
Qt::Key_Launch0 0x010000a2 On X11 this key is mapped to "My Computer" (XF86XK_MyComputer) key for legacy reasons.
Qt::Key_Launch1 0x010000a3 On X11 this key is mapped to "Calculator" (XF86XK_Calculator) key for legacy reasons.
Qt::Key_Launch2 0x010000a4 On X11 this key is mapped to XF86XK_Launch0 key for legacy reasons.
Qt::Key_Launch3 0x010000a5 On X11 this key is mapped to XF86XK_Launch1 key for legacy reasons.
Qt::Key_Launch4 0x010000a6 On X11 this key is mapped to XF86XK_Launch2 key for legacy reasons.
Qt::Key_Launch5 0x010000a7 On X11 this key is mapped to XF86XK_Launch3 key for legacy reasons.
Qt::Key_Launch6 0x010000a8 On X11 this key is mapped to XF86XK_Launch4 key for legacy reasons.
Qt::Key_Launch7 0x010000a9 On X11 this key is mapped to XF86XK_Launch5 key for legacy reasons.
Qt::Key_Launch8 0x010000aa On X11 this key is mapped to XF86XK_Launch6 key for legacy reasons.
Qt::Key_Launch9 0x010000ab On X11 this key is mapped to XF86XK_Launch7 key for legacy reasons.
Qt::Key_LaunchA 0x010000ac On X11 this key is mapped to XF86XK_Launch8 key for legacy reasons.
Qt::Key_LaunchB 0x010000ad On X11 this key is mapped to XF86XK_Launch9 key for legacy reasons.
Qt::Key_LaunchC 0x010000ae On X11 this key is mapped to XF86XK_LaunchA key for legacy reasons.
Qt::Key_LaunchD 0x010000af On X11 this key is mapped to XF86XK_LaunchB key for legacy reasons.
Qt::Key_LaunchE 0x010000b0 On X11 this key is mapped to XF86XK_LaunchC key for legacy reasons.
Qt::Key_LaunchF 0x010000b1 On X11 this key is mapped to XF86XK_LaunchD key for legacy reasons.
Qt::Key_LaunchG 0x0100010e On X11 this key is mapped to XF86XK_LaunchE key for legacy reasons.
Qt::Key_LaunchH 0x0100010f On X11 this key is mapped to XF86XK_LaunchF key for legacy reasons.
Qt::Key_MonBrightnessUp 0x010000b2  
Qt::Key_MonBrightnessDown 0x010000b3  
Qt::Key_KeyboardLightOnOff 0x010000b4  
Qt::Key_KeyboardBrightnessUp 0x010000b5  
Qt::Key_KeyboardBrightnessDown 0x010000b6  
Qt::Key_PowerOff 0x010000b7  
Qt::Key_WakeUp 0x010000b8  
Qt::Key_Eject 0x010000b9  
Qt::Key_ScreenSaver 0x010000ba  
Qt::Key_WWW 0x010000bb  
Qt::Key_Memo 0x010000bc  
Qt::Key_LightBulb 0x010000bd  
Qt::Key_Shop 0x010000be  
Qt::Key_History 0x010000bf  
Qt::Key_AddFavorite 0x010000c0  
Qt::Key_HotLinks 0x010000c1  
Qt::Key_BrightnessAdjust 0x010000c2  
Qt::Key_Finance 0x010000c3  
Qt::Key_Community 0x010000c4  
Qt::Key_AudioRewind 0x010000c5  
Qt::Key_BackForward 0x010000c6  
Qt::Key_ApplicationLeft 0x010000c7  
Qt::Key_ApplicationRight 0x010000c8  
Qt::Key_Book 0x010000c9  
Qt::Key_CD 0x010000ca  
Qt::Key_Calculator 0x010000cb On X11 this key is not mapped for legacy reasons. Use Qt::Key_Launch1 instead.
Qt::Key_ToDoList 0x010000cc  
Qt::Key_ClearGrab 0x010000cd  
Qt::Key_Close 0x010000ce  
Qt::Key_Copy 0x010000cf  
Qt::Key_Cut 0x010000d0  
Qt::Key_Display 0x010000d1  
Qt::Key_DOS 0x010000d2  
Qt::Key_Documents 0x010000d3  
Qt::Key_Excel 0x010000d4  
Qt::Key_Explorer 0x010000d5  
Qt::Key_Game 0x010000d6  
Qt::Key_Go 0x010000d7  
Qt::Key_iTouch 0x010000d8  
Qt::Key_LogOff 0x010000d9  
Qt::Key_Market 0x010000da  
Qt::Key_Meeting 0x010000db  
Qt::Key_MenuKB 0x010000dc  
Qt::Key_MenuPB 0x010000dd  
Qt::Key_MySites 0x010000de  
Qt::Key_News 0x010000df  
Qt::Key_OfficeHome 0x010000e0  
Qt::Key_Option 0x010000e1  
Qt::Key_Paste 0x010000e2  
Qt::Key_Phone 0x010000e3  
Qt::Key_Calendar 0x010000e4  
Qt::Key_Reply 0x010000e5  
Qt::Key_Reload 0x010000e6  
Qt::Key_RotateWindows 0x010000e7  
Qt::Key_RotationPB 0x010000e8  
Qt::Key_RotationKB 0x010000e9  
Qt::Key_Save 0x010000ea  
Qt::Key_Send 0x010000eb  
Qt::Key_Spell 0x010000ec  
Qt::Key_SplitScreen 0x010000ed  
Qt::Key_Support 0x010000ee  
Qt::Key_TaskPane 0x010000ef  
Qt::Key_Terminal 0x010000f0  
Qt::Key_Tools 0x010000f1  
Qt::Key_Travel 0x010000f2  
Qt::Key_Video 0x010000f3  
Qt::Key_Word 0x010000f4  
Qt::Key_Xfer 0x010000f5  
Qt::Key_ZoomIn 0x010000f6  
Qt::Key_ZoomOut 0x010000f7  
Qt::Key_Away 0x010000f8  
Qt::Key_Messenger 0x010000f9  
Qt::Key_WebCam 0x010000fa  
Qt::Key_MailForward 0x010000fb  
Qt::Key_Pictures 0x010000fc  
Qt::Key_Music 0x010000fd  
Qt::Key_Battery 0x010000fe  
Qt::Key_Bluetooth 0x010000ff  
Qt::Key_WLAN 0x01000100  
Qt::Key_UWB 0x01000101  
Qt::Key_AudioForward 0x01000102  
Qt::Key_AudioRepeat 0x01000103  
Qt::Key_AudioRandomPlay 0x01000104  
Qt::Key_Subtitle 0x01000105  
Qt::Key_AudioCycleTrack 0x01000106  
Qt::Key_Time 0x01000107  
Qt::Key_Hibernate 0x01000108  
Qt::Key_View 0x01000109  
Qt::Key_TopMenu 0x0100010a  
Qt::Key_PowerDown 0x0100010b  
Qt::Key_Suspend 0x0100010c  
Qt::Key_ContrastAdjust 0x0100010d  
Qt::Key_TouchpadToggle 0x01000110  
Qt::Key_TouchpadOn 0x01000111  
Qt::Key_TouchpadOff 0x01000112  
Qt::Key_MicMute 0x01000113  
Qt::Key_Red 0x01000114  
Qt::Key_Green 0x01000115  
Qt::Key_Yellow 0x01000116  
Qt::Key_Blue 0x01000117  
Qt::Key_ChannelUp 0x01000118  
Qt::Key_ChannelDown 0x01000119  
Qt::Key_Guide 0x0100011a  
Qt::Key_Info 0x0100011b  
Qt::Key_Settings 0x0100011c  
Qt::Key_MicVolumeUp 0x0100011d  
Qt::Key_MicVolumeDown 0x0100011e  
Qt::Key_New 0x01000120  
Qt::Key_Open 0x01000121  
Qt::Key_Find 0x01000122  
Qt::Key_Undo 0x01000123  
Qt::Key_Redo 0x01000124  
Qt::Key_MediaLast 0x0100ffff  
Qt::Key_unknown 0x01ffffff  
Qt::Key_Call 0x01100004 A key to answer or initiate a call (see Qt::Key_ToggleCallHangup for a key to toggle current call state)
Qt::Key_Camera 0x01100020 A key to activate the camera shutter. On Windows Runtime, the environment variable QT_QPA_ENABLE_CAMERA_KEYS must be set to receive the event.
Qt::Key_CameraFocus 0x01100021 A key to focus the camera. On Windows Runtime, the environment variable QT_QPA_ENABLE_CAMERA_KEYS must be set to receive the event.
Qt::Key_Context1 0x01100000  
Qt::Key_Context2 0x01100001  
Qt::Key_Context3 0x01100002  
Qt::Key_Context4 0x01100003  
Qt::Key_Flip 0x01100006  
Qt::Key_Hangup 0x01100005 A key to end an ongoing call (see Qt::Key_ToggleCallHangup for a key to toggle current call state)
Qt::Key_No 0x01010002  
Qt::Key_Select 0x01010000  
Qt::Key_Yes 0x01010001  
Qt::Key_ToggleCallHangup 0x01100007 A key to toggle the current call state (ie. either answer, or hangup) depending on current call state
Qt::Key_VoiceDial 0x01100008  
Qt::Key_LastNumberRedial 0x01100009  
Qt::Key_Execute 0x01020003  
Qt::Key_Printer 0x01020002  
Qt::Key_Play 0x01020005  
Qt::Key_Sleep 0x01020004  
Qt::Key_Zoom 0x01020006  
Qt::Key_Exit 0x0102000a  
Qt::Key_Cancel 0x01020001  

See also QKeyEvent::key().

enum Qt::KeyboardModifier
flags Qt::KeyboardModifiers

This enum describes the modifier keys.

Constant Value Description
Qt::NoModifier 0x00000000 No modifier key is pressed.
Qt::ShiftModifier 0x02000000 A Shift key on the keyboard is pressed.
Qt::ControlModifier 0x04000000 A Ctrl key on the keyboard is pressed.
Qt::AltModifier 0x08000000 An Alt key on the keyboard is pressed.
Qt::MetaModifier 0x10000000 A Meta key on the keyboard is pressed.
Qt::KeypadModifier 0x20000000 A keypad button is pressed.
Qt::GroupSwitchModifier 0x40000000 X11 only. A Mode_switch key on the keyboard is pressed.

Note: On macOS, the ControlModifier value corresponds to the Command keys on the keyboard, and the MetaModifier value corresponds to the Control keys. The KeypadModifier value will also be set when an arrow key is pressed as the arrow keys are considered part of the keypad.

Note: On Windows Keyboards, Qt::MetaModifier and Qt::Key_Meta are mapped to the Windows key.

The KeyboardModifiers type is a typedef for QFlags<KeyboardModifier>. It stores an OR combination of KeyboardModifier values.

See also MouseButton and Modifier.

enum Qt::LayoutDirection

Specifies the direction of Qt's layouts and text handling.

Constant Value Description
Qt::LeftToRight 0 Left-to-right layout.
Qt::RightToLeft 1 Right-to-left layout.
Qt::LayoutDirectionAuto 2 Automatic layout.

Right-to-left layouts are necessary for certain languages, notably Arabic and Hebrew.

LayoutDirectionAuto serves two purposes. When used in conjunction with widgets and layouts, it will imply to use the layout direction set on the parent widget or QApplication. This has the same effect as QWidget::unsetLayoutDirection().

When LayoutDirectionAuto is used in conjunction with text layouting, it will imply that the text directionality is determined from the content of the string to be layouted.

See also QGuiApplication::setLayoutDirection(), QWidget::setLayoutDirection(), QTextOption::setTextDirection(), and QString::isRightToLeft().

enum Qt::MaskMode

This enum specifies the behavior of the QPixmap::createMaskFromColor() and QImage::createMaskFromColor() functions.

Constant Value Description
Qt::MaskInColor 0 Creates a mask where all pixels matching the given color are opaque.
Qt::MaskOutColor 1 Creates a mask where all pixels matching the given color are transparent.

enum Qt::MatchFlag
flags Qt::MatchFlags

This enum describes the type of matches that can be used when searching for items in a model.

Constant Value Description
Qt::MatchExactly 0 Performs QVariant-based matching.
Qt::MatchFixedString 8 Performs string-based matching. String-based comparisons are case-insensitive unless the MatchCaseSensitive flag is also specified.
Qt::MatchContains 1 The search term is contained in the item.
Qt::MatchStartsWith 2 The search term matches the start of the item.
Qt::MatchEndsWith 3 The search term matches the end of the item.
Qt::MatchCaseSensitive 16 The search is case sensitive.
Qt::MatchRegExp 4 Performs string-based matching using a regular expression as the search term.
Qt::MatchWildcard 5 Performs string-based matching using a string with wildcards as the search term.
Qt::MatchWrap 32 Perform a search that wraps around, so that when the search reaches the last item in the model, it begins again at the first item and continues until all items have been examined.
Qt::MatchRecursive 64 Searches the entire hierarchy.

The MatchFlags type is a typedef for QFlags<MatchFlag>. It stores an OR combination of MatchFlag values.

See also QString::compare() and QRegExp.

enum Qt::Modifier

This enum provides shorter names for the keyboard modifier keys supported by Qt.

Note: On macOS, the CTRL value corresponds to the Command keys on the keyboard, and the META value corresponds to the Control keys.

Constant Value Description
Qt::SHIFT Qt::ShiftModifier The Shift keys provided on all standard keyboards.
Qt::META Qt::MetaModifier The Meta keys.
Qt::CTRL Qt::ControlModifier The Ctrl keys.
Qt::ALT Qt::AltModifier The normal Alt keys, but not keys like AltGr.
Qt::UNICODE_ACCEL 0x00000000 The shortcut is specified as a Unicode code point, not as a Qt Key.

See also KeyboardModifier and MouseButton.

enum Qt::MouseButton
flags Qt::MouseButtons

This enum type describes the different mouse buttons.

Constant Value Description
Qt::NoButton 0x00000000 The button state does not refer to any button (see QMouseEvent::button()).
Qt::AllButtons 0x07ffffff This value corresponds to a mask of all possible mouse buttons. Use to set the 'acceptedButtons' property of a MouseArea to accept ALL mouse buttons.
Qt::LeftButton 0x00000001 The left button is pressed, or an event refers to the left button. (The left button may be the right button on left-handed mice.)
Qt::RightButton 0x00000002 The right button.
Qt::MidButton 0x00000004 The middle button.
Qt::MiddleButton MidButton The middle button.
Qt::BackButton 0x00000008 The 'Back' button. (Typically present on the 'thumb' side of a mouse with extra buttons. This is NOT the tilt wheel.)
Qt::XButton1 BackButton The 'Back' Button.
Qt::ExtraButton1 XButton1 The 'Back' Button.
Qt::ForwardButton 0x00000010 The 'Forward' Button. (Typically present beside the 'Back' button, and also pressed by the thumb.)
Qt::XButton2 ForwardButton The 'Forward Button.
Qt::ExtraButton2 ForwardButton The 'Forward' Button.
Qt::TaskButton 0x00000020 The 'Task' Button.
Qt::ExtraButton3 TaskButton The 'Task' Button.
Qt::ExtraButton4 0x00000040 The 7th non-wheel Mouse Button.
Qt::ExtraButton5 0x00000080 The 8th non-wheel Mouse Button.
Qt::ExtraButton6 0x00000100 The 9th non-wheel Mouse Button.
Qt::ExtraButton7 0x00000200 The 10th non-wheel Mouse Button.
Qt::ExtraButton8 0x00000400 The 11th non-wheel Mouse Button.
Qt::ExtraButton9 0x00000800 The 12th non-wheel Mouse Button.
Qt::ExtraButton10 0x00001000 The 13th non-wheel Mouse Button.
Qt::ExtraButton11 0x00002000 The 14th non-wheel Mouse Button.
Qt::ExtraButton12 0x00004000 The 15th non-wheel Mouse Button.
Qt::ExtraButton13 0x00008000 The 16th non-wheel Mouse Button.
Qt::ExtraButton14 0x00010000 The 17th non-wheel Mouse Button.
Qt::ExtraButton15 0x00020000 The 18th non-wheel Mouse Button.
Qt::ExtraButton16 0x00040000 The 19th non-wheel Mouse Button.
Qt::ExtraButton17 0x00080000 The 20th non-wheel Mouse Button.
Qt::ExtraButton18 0x00100000 The 21st non-wheel Mouse Button.
Qt::ExtraButton19 0x00200000 The 22nd non-wheel Mouse Button.
Qt::ExtraButton20 0x00400000 The 23rd non-wheel Mouse Button.
Qt::ExtraButton21 0x00800000 The 24th non-wheel Mouse Button.
Qt::ExtraButton22 0x01000000 The 25th non-wheel Mouse Button.
Qt::ExtraButton23 0x02000000 The 26th non-wheel Mouse Button.
Qt::ExtraButton24 0x04000000 The 27th non-wheel Mouse Button.

Note: Some models of multi-button mice are pre-configured with high-numbered Buttons emulating keyboard sequences, for use in specific games. In order for these Buttons to be seen as actual 'Mouse Buttons', the device must be re-configured (using the vendor's configuration tool).

The MouseButtons type is a typedef for QFlags<MouseButton>. It stores an OR combination of MouseButton values.

See also KeyboardModifier and Modifier.

enum Qt::MouseEventFlag
flags Qt::MouseEventFlags

This enum provides additional information concerning a QMouseEvent.

Constant Value Description
Qt::MouseEventCreatedDoubleClick 0x01 Indicates that Qt has created a MouseButtonDblClick event from this event. The flag is set in the causing MouseButtonPress, and not in the resulting MouseButtonDblClick.

This enum was introduced or modified in Qt 5.3.

The MouseEventFlags type is a typedef for QFlags<MouseEventFlag>. It stores an OR combination of MouseEventFlag values.

enum Qt::MouseEventSource

This enum describes the source of a mouse event and can be useful to determine if the event is an artificial mouse event originating from another device such as a touchscreen.

Constant Value Description
Qt::MouseEventNotSynthesized 0 The most common value. On platforms where such information is available this value indicates that the event was generated in response to a genuine mouse event in the system.
Qt::MouseEventSynthesizedBySystem 1 Indicates that the mouse event was synthesized from a touch event by the platform.
Qt::MouseEventSynthesizedByQt 2 Indicates that the mouse event was synthesized from an unhandled touch event by Qt.
Qt::MouseEventSynthesizedByApplication 3 Indicates that the mouse event was synthesized by the application. This allows distinguishing application-generated mouse events from the ones that are coming from the system or are synthesized by Qt. This value was introduced in Qt 5.6

This enum was introduced or modified in Qt 5.3.

See also Qt::AA_SynthesizeMouseForUnhandledTouchEvents.

enum Qt::NativeGestureType

This enum returns the gesture type.

Constant Value Description
Qt::BeginNativeGesture 0 Sent before gesture event stream.
Qt::EndNativeGesture 1 Sent after gesture event stream.
Qt::PanNativeGesture 2 Sent after a panning gesture. Similar to a click-and-drag mouse movement.
Qt::ZoomNativeGesture 3 Specifies the magnification delta in percent.
Qt::SmartZoomNativeGesture 4 Boolean magnification state.
Qt::RotateNativeGesture 5 Rotation delta in degrees.
Qt::SwipeNativeGesture 6 Sent after a swipe movements.

This enum was introduced or modified in Qt 5.2.

This enum type describes the mode for moving focus.

Constant Value Description
Qt::NavigationModeNone 0 Only the touch screen is used.
Qt::NavigationModeKeypadTabOrder 1 Qt::Key_Up and Qt::Key_Down are used to change focus.
Qt::NavigationModeKeypadDirectional 2 Qt::Key_Up, Qt::Key_Down, Qt::Key_Left and Qt::Key_Right are used to change focus.
Qt::NavigationModeCursorAuto 3 The mouse cursor is used to change focus, it is displayed only on non touchscreen devices. The keypad is used to implement a virtual cursor, unless the device has an analog mouse type of input device (e.g. touchpad). This is the recommended setting for an application such as a web browser that needs pointer control on both touch and non-touch devices.
Qt::NavigationModeCursorForceVisible 4 The mouse cursor is used to change focus, it is displayed regardless of device type. The keypad is used to implement a virtual cursor, unless the device has an analog mouse type of input device (e.g. touchpad)

Note: Cursor navigation is not currently implemented on any platform and behaves as NavigationModeNone.

This enum was introduced or modified in Qt 4.6.

See also QApplication::setNavigationMode() and QApplication::navigationMode().

enum Qt::Orientation
flags Qt::Orientations

This type is used to signify an object's orientation.

Constant Value
Qt::Horizontal 0x1
Qt::Vertical 0x2

Orientation is used with QScrollBar for example.

The Orientations type is a typedef for QFlags<Orientation>. It stores an OR combination of Orientation values.

enum Qt::PenCapStyle

This enum type defines the pen cap styles supported by Qt, i.e. the line end caps that can be drawn using QPainter.

Qt::SquareCap Qt::FlatCap Qt::RoundCap
Constant Value Description
Qt::FlatCap 0x00 a square line end that does not cover the end point of the line.
Qt::SquareCap 0x10 a square line end that covers the end point and extends beyond it by half the line width.
Qt::RoundCap 0x20 a rounded line end.

See also QPen.

enum Qt::PenJoinStyle

This enum type defines the pen join styles supported by Qt, i.e. which joins between two connected lines can be drawn using QPainter.

Qt::BevelJoin Qt::MiterJoin Qt::RoundJoin
Constant Value Description
Qt::MiterJoin 0x00 The outer edges of the lines are extended to meet at an angle, and this area is filled.
Qt::BevelJoin 0x40 The triangular notch between the two lines is filled.
Qt::RoundJoin 0x80 A circular arc between the two lines is filled.
Qt::SvgMiterJoin 0x100 A miter join corresponding to the definition of a miter join in the SVG 1.2 Tiny specification.

See also QPen.

enum Qt::PenStyle

This enum type defines the pen styles that can be drawn using QPainter. The styles are:

Qt::SolidLine Qt::DashLine Qt::DotLine
Qt::DashDotLine Qt::DashDotDotLine Qt::CustomDashLine
Constant Value Description
Qt::NoPen 0 no line at all. For example, QPainter::drawRect() fills but does not draw any boundary line.
Qt::SolidLine 1 A plain line.
Qt::DashLine 2 Dashes separated by a few pixels.
Qt::DotLine 3 Dots separated by a few pixels.
Qt::DashDotLine 4 Alternate dots and dashes.
Qt::DashDotDotLine 5 One dash, two dots, one dash, two dots.
Qt::CustomDashLine 6 A custom pattern defined using QPainterPathStroker::setDashPattern().

See also QPen.

enum Qt::ScreenOrientation
flags Qt::ScreenOrientations

This enum type specifies the various orientations a screen might have.

Constant Value Description
Qt::PrimaryOrientation 0x00000000 The display's primary orientation.
Qt::LandscapeOrientation 0x00000002 Landscape orientation, display width is greater than display height.
Qt::PortraitOrientation 0x00000001 Portrait orientation, display height is greater than display width, rotated 90 degree clockwise relative to landscape.
Qt::InvertedLandscapeOrientation 0x00000008 Inverted landscape orientation, rotated 180 degrees relative to landscape.
Qt::InvertedPortraitOrientation 0x00000004 Inverted portrait orientation, rotated 180 degrees relative to portrait.

The ScreenOrientations type is a typedef for QFlags<ScreenOrientation>. It stores an OR combination of ScreenOrientation values.

enum Qt::ScrollBarPolicy

This enum type describes the various modes of QAbstractScrollArea's scroll bars.

Constant Value Description
Qt::ScrollBarAsNeeded 0 QAbstractScrollArea shows a scroll bar when the content is too large to fit and not otherwise. This is the default.
Qt::ScrollBarAlwaysOff 1 QAbstractScrollArea never shows a scroll bar.
Qt::ScrollBarAlwaysOn 2 QAbstractScrollArea always shows a scroll bar. This property is ignored on systems with transient scroll bars (e.g., on Mac from version 10.7).

(The modes for the horizontal and vertical scroll bars are independent.)

enum Qt::ScrollPhase

This enum describes the phase of scrolling.

Constant Value Description
Qt::NoScrollPhase 0 The input device doesn't support scroll phase. This value was introduced in Qt 5.7.
Qt::ScrollBegin 1 Scrolling is about to begin, but the scrolling distance did not yet change.
Qt::ScrollUpdate 2 The scrolling distance has changed (default).
Qt::ScrollEnd 3 Scrolling has ended, but the scrolling distance did not change anymore.

This enum was introduced or modified in Qt 5.2.

enum Qt::ShortcutContext

For a QEvent::Shortcut event to occur, the shortcut's key sequence must be entered by the user in a context where the shortcut is active. The possible contexts are these:

Constant Value Description
Qt::WidgetShortcut 0 The shortcut is active when its parent widget has focus.
Qt::WidgetWithChildrenShortcut 3 The shortcut is active when its parent widget, or any of its children has focus. Children which are top-level widgets, except pop-ups, are not affected by this shortcut context.
Qt::WindowShortcut 1 The shortcut is active when its parent widget is a logical subwidget of the active top-level window.
Qt::ApplicationShortcut 2 The shortcut is active when one of the applications windows are active.

enum Qt::SizeHint

This enum is used by QGraphicsLayoutItem::sizeHint()

Constant Value Description
Qt::MinimumSize 0 is used to specify the minimum size of a graphics layout item.
Qt::PreferredSize 1 is used to specify the preferred size of a graphics layout item.
Qt::MaximumSize 2 is used to specify the maximum size of a graphics layout item.
Qt::MinimumDescent 3 is used to specify the minimum descent of a text string in a graphics layout item.

This enum was introduced or modified in Qt 4.4.

See also QGraphicsLayoutItem::sizeHint().

enum Qt::SizeMode

This enum is used by QPainter::drawRoundedRect() and QPainterPath::addRoundedRect() functions to specify the radii of rectangle corners with respect to the dimensions of the bounding rectangles specified.

Constant Value Description
Qt::AbsoluteSize 0 Specifies the size using absolute measurements.
Qt::RelativeSize 1 Specifies the size relative to the bounding rectangle, typically using percentage measurements.

This enum was introduced or modified in Qt 4.4.

enum Qt::SortOrder

This enum describes how the items in a widget are sorted.

Constant Value Description
Qt::AscendingOrder 0 The items are sorted ascending e.g. starts with 'AAA' ends with 'ZZZ' in Latin-1 locales
Qt::DescendingOrder 1 The items are sorted descending e.g. starts with 'ZZZ' ends with 'AAA' in Latin-1 locales

enum Qt::TabFocusBehavior

This enum type provides different focus behaviors for tab navigation.

Constant Value Description
Qt::NoTabFocus 0x00 iterate nothing.
Qt::TabFocusTextControls 0x01 iterate text controls and widgets.
Qt::TabFocusListControls 0x02 iterate list controls and widgets.
Qt::TabFocusAllControls 0xff iterate all controls and widgets.

This enum was introduced or modified in Qt 5.5.

enum Qt::TextElideMode

This enum specifies where the ellipsis should appear when displaying texts that don't fit:

Constant Value Description
Qt::ElideLeft 0 The ellipsis should appear at the beginning of the text.
Qt::ElideRight 1 The ellipsis should appear at the end of the text.
Qt::ElideMiddle 2 The ellipsis should appear in the middle of the text.
Qt::ElideNone 3 Ellipsis should NOT appear in the text.

Qt::ElideMiddle is normally the most appropriate choice for URLs (e.g., "http://bugreports.qt.../QTWEBSITE-13/"), whereas Qt::ElideRight is appropriate for other strings (e.g., "Deploying Applications on Ma...").

See also QAbstractItemView::textElideMode, QFontMetrics::elidedText(), AlignmentFlag, and QTabBar::elideMode.

enum Qt::TextFlag

This enum type is used to define some modifier flags. Some of these flags only make sense in the context of printing:

Constant Value Description
Qt::TextSingleLine 0x0100 Treats all whitespace as spaces and prints just one line.
Qt::TextDontClip 0x0200 If it's impossible to stay within the given bounds, it prints outside.
Qt::TextExpandTabs 0x0400 Makes the U+0009 (ASCII tab) character move to the next tab stop.
Qt::TextShowMnemonic 0x0800 Displays the string "&P" as P For an ampersand, use "&&".
Qt::TextWordWrap 0x1000 Breaks lines at appropriate points, e.g. at word boundaries.
Qt::TextWrapAnywhere 0x2000 Breaks lines anywhere, even within words.
Qt::TextHideMnemonic 0x8000 Same as Qt::TextShowMnemonic but doesn't draw the underlines.
Qt::TextDontPrint 0x4000 Treat this text as "hidden" and don't print it.
Qt::TextIncludeTrailingSpaces 0x08000000 When this option is set, QTextLine::naturalTextWidth() and QTextLine::naturalTextRect() will return a value that includes the width of trailing spaces in the text; otherwise this width is excluded.
Qt::TextJustificationForced 0x10000 Ensures that text lines are justified.

You can use as many modifier flags as you want, except that Qt::TextSingleLine and Qt::TextWordWrap cannot be combined.

Flags that are inappropriate for a given use are generally ignored.

enum Qt::TextFormat

This enum is used in widgets that can display both plain text and rich text, for example QLabel. It is used for deciding whether a text string should be interpreted as one or the other. This is normally done by passing one of the enum values to a QTextEdit::setTextFormat() function.

Constant Value Description
Qt::PlainText 0 The text string is interpreted as a plain text string.
Qt::RichText 1 The text string is interpreted as a rich text string. See Supported HTML Subset for the definition of rich text.
Qt::AutoText 2 The text string is interpreted as for Qt::RichText if Qt::mightBeRichText() returns true, otherwise as Qt::PlainText.

enum Qt::TextInteractionFlag
flags Qt::TextInteractionFlags

This enum specifies how a text displaying widget reacts to user input.

Constant Value Description
Qt::NoTextInteraction 0 No interaction with the text is possible.
Qt::TextSelectableByMouse 1 Text can be selected with the mouse and copied to the clipboard using a context menu or standard keyboard shortcuts.
Qt::TextSelectableByKeyboard 2 Text can be selected with the cursor keys on the keyboard. A text cursor is shown.
Qt::LinksAccessibleByMouse 4 Links can be highlighted and activated with the mouse.
Qt::LinksAccessibleByKeyboard 8 Links can be focused using tab and activated with enter.
Qt::TextEditable 16 The text is fully editable.
Qt::TextEditorInteraction TextSelectableByMouse | TextSelectableByKeyboard | TextEditable The default for a text editor.
Qt::TextBrowserInteraction TextSelectableByMouse | LinksAccessibleByMouse | LinksAccessibleByKeyboard The default for QTextBrowser.

The TextInteractionFlags type is a typedef for QFlags<TextInteractionFlag>. It stores an OR combination of TextInteractionFlag values.

enum Qt::TileRule

This enum describes how to repeat or stretch the parts of an image when drawing.

Constant Value Description
Qt::StretchTile 0 Scale the image to fit to the available area.
Qt::RepeatTile 1 Repeat the image until there is no more space. May crop the last image.
Qt::RoundTile 2 Similar to Repeat, but scales the image down to ensure that the last tile is not cropped.

This enum was introduced or modified in Qt 4.6.

enum Qt::TimeSpec

Constant Value Description
Qt::LocalTime 0 Locale dependent time (Timezones and Daylight Savings Time).
Qt::UTC 1 Coordinated Universal Time, replaces Greenwich Mean Time.
Qt::OffsetFromUTC 2 An offset in seconds from Coordinated Universal Time.
Qt::TimeZone 3 A named time zone using a specific set of Daylight Savings rules.

enum Qt::TimerType

The timer type indicates how accurate a timer can be.

Constant Value Description
Qt::PreciseTimer 0 Precise timers try to keep millisecond accuracy
Qt::CoarseTimer 1 Coarse timers try to keep accuracy within 5% of the desired interval
Qt::VeryCoarseTimer 2 Very coarse timers only keep full second accuracy

On UNIX (including Linux, macOS, and iOS), Qt will keep millisecond accuracy for Qt::PreciseTimer. For Qt::CoarseTimer, the interval will be adjusted up to 5% to align the timer with other timers that are expected to fire at or around the same time. The objective is to make most timers wake up at the same time, thereby reducing CPU wakeups and power consumption.

On Windows, Qt will use Windows's Multimedia timer facility (if available) for Qt::PreciseTimer and normal Windows timers for Qt::CoarseTimer and Qt::VeryCoarseTimer.

On all platforms, the interval for Qt::VeryCoarseTimer is rounded to the nearest full second (e.g. an interval of 23500ms will be rounded to 24000ms, and 20300ms to 20000ms).

enum Qt::ToolBarArea
flags Qt::ToolBarAreas

Constant Value
Qt::LeftToolBarArea 0x1
Qt::RightToolBarArea 0x2
Qt::TopToolBarArea 0x4
Qt::BottomToolBarArea 0x8
Qt::AllToolBarAreas ToolBarArea_Mask
Qt::NoToolBarArea 0

The ToolBarAreas type is a typedef for QFlags<ToolBarArea>. It stores an OR combination of ToolBarArea values.

enum Qt::ToolButtonStyle

The style of the tool button, describing how the button's text and icon should be displayed.

Constant Value Description
Qt::ToolButtonIconOnly 0 Only display the icon.
Qt::ToolButtonTextOnly 1 Only display the text.
Qt::ToolButtonTextBesideIcon 2 The text appears beside the icon.
Qt::ToolButtonTextUnderIcon 3 The text appears under the icon.
Qt::ToolButtonFollowStyle 4 Follow the style.

enum Qt::TouchPointState
flags Qt::TouchPointStates

This enum represents the state of a touch point at the time a QTouchEvent occurred.

Constant Value Description
Qt::TouchPointPressed 0x01 The touch point is now pressed.
Qt::TouchPointMoved 0x02 The touch point moved.
Qt::TouchPointStationary 0x04 The touch point did not move.
Qt::TouchPointReleased 0x08 The touch point was released.

This enum was introduced or modified in Qt 4.6.

The TouchPointStates type is a typedef for QFlags<TouchPointState>. It stores an OR combination of TouchPointState values.

enum Qt::TransformationMode

This enum type defines whether image transformations (e.g., scaling) should be smooth or not.

Constant Value Description
Qt::FastTransformation 0 The transformation is performed quickly, with no smoothing.
Qt::SmoothTransformation 1 The resulting image is transformed using bilinear filtering.

See also QImage::scaled().

enum Qt::UIEffect

This enum describes the available UI effects.

By default, Qt will try to use the platform specific desktop settings for each effect. Use the QApplication::setDesktopSettingsAware() function (passing false as argument) to prevent this, and the QApplication::setEffectEnabled() to enable or disable a particular effect.

Note that all effects are disabled on screens running at less than 16-bit color depth.

Constant Value Description
Qt::UI_AnimateMenu 1 Show animated menus.
Qt::UI_FadeMenu 2 Show faded menus.
Qt::UI_AnimateCombo 3 Show animated comboboxes.
Qt::UI_AnimateTooltip 4 Show tooltip animations.
Qt::UI_FadeTooltip 5 Show tooltip fading effects.
Qt::UI_AnimateToolBox 6 Reserved

See also QApplication::setEffectEnabled() and QGuiApplication::setDesktopSettingsAware().

enum Qt::WhiteSpaceMode

This enum describes the types of whitespace mode that are used by the QTextDocument class to meet the requirements of different kinds of textual information.

Constant Value Description
Qt::WhiteSpaceNormal 0 The whitespace mode used to display normal word wrapped text in paragraphs.
Qt::WhiteSpacePre 1 A preformatted text mode in which whitespace is reproduced exactly.
Qt::WhiteSpaceNoWrap 2  

enum Qt::WidgetAttribute

This enum type is used to specify various widget attributes. Attributes are set and cleared with QWidget::setAttribute(), and queried with QWidget::testAttribute(), although some have special convenience functions which are mentioned below.

Constant Value Description
Qt::WA_AcceptDrops 78 Allows data from drag and drop operations to be dropped onto the widget (see QWidget::setAcceptDrops()).
Qt::WA_AlwaysShowToolTips 84 Enables tooltips for inactive windows.
Qt::WA_ContentsPropagated 3 This flag is superfluous and obsolete; it no longer has any effect. Since Qt 4.1, all widgets that do not set WA_PaintOnScreen propagate their contents.
Qt::WA_CustomWhatsThis 47 Indicates that the widget wants to continue operating normally in "What's This?" mode. This is set by the widget's author.
Qt::WA_DeleteOnClose 55 Makes Qt delete this widget when the widget has accepted the close event (see QWidget::closeEvent()).
Qt::WA_Disabled 0 Indicates that the widget is disabled, i.e. it does not receive any mouse or keyboard events. There is also a getter functions QWidget::isEnabled(). This is set/cleared by the Qt kernel.
Qt::WA_DontShowOnScreen 103 Indicates that the widget is hidden or is not a part of the viewable Desktop.
Qt::WA_ForceDisabled 32 Indicates that the widget is explicitly disabled, i.e. it will remain disabled even when all its ancestors are set to the enabled state. This implies WA_Disabled. This is set/cleared by QWidget::setEnabled() and QWidget::setDisabled().
Qt::WA_ForceUpdatesDisabled 59 Indicates that updates are explicitly disabled for the widget; i.e. it will remain disabled even when all its ancestors are set to the updates-enabled state. This implies WA_UpdatesDisabled. This is set/cleared by QWidget::setUpdatesEnabled().
Qt::WA_GroupLeader 72 This attribute has been deprecated. Use QWidget::windowModality instead.
Qt::WA_Hover 74 Forces Qt to generate paint events when the mouse enters or leaves the widget. This feature is typically used when implementing custom styles; see the Styles example for details.
Qt::WA_InputMethodEnabled 14 Enables input methods for Asian languages. Must be set when creating custom text editing widgets.
Qt::WA_KeyboardFocusChange 77 Set on a toplevel window when the users changes focus with the keyboard (tab, backtab, or shortcut).
Qt::WA_KeyCompression 33 Enables key event compression if set, and disables it if not set. By default key compression is off, so widgets receive one key press event for each key press (or more, since autorepeat is usually on). If you turn it on and your program doesn't keep up with key input, Qt may try to compress key events so that more than one character can be processed in each event. For example, a word processor widget might receive 2, 3 or more characters in each QKeyEvent::text(), if the layout recalculation takes too long for the CPU. If a widget supports multiple character unicode input, it is always safe to turn the compression on. Qt performs key event compression only for printable characters. Qt::Modifier keys, cursor movement keys, function keys and miscellaneous action keys (e.g. Escape, Enter, Backspace, PrintScreen) will stop key event compression, even if there are more compressible key events available. Platforms other than Mac and X11 do not support this compression, in which case turning it on will have no effect. This is set/cleared by the widget's author.
Qt::WA_LayoutOnEntireRect 48 Indicates that the widget wants QLayout to operate on the entire QWidget::rect(), not only on QWidget::contentsRect(). This is set by the widget's author.
Qt::WA_LayoutUsesWidgetRect 92 Ignore the layout item rect from the style when laying out this widget with QLayout.
Qt::WA_MacNoClickThrough 12 This value is obsolete and has no effect.
Qt::WA_MacOpaqueSizeGrip 85 Indicates that the native Carbon size grip should be opaque instead of transparent (the default). This attribute is only applicable to macOS and is set by the widget's author.
Qt::WA_MacShowFocusRect 88 Indicates that this widget should get a QFocusFrame around it. Some widgets draw their own focus halo regardless of this attribute. Not that the QWidget::focusPolicy also plays the main role in whether something is given focus or not, this only controls whether or not this gets the focus frame. This attribute is only applicable to macOS.
Qt::WA_MacNormalSize 89 Indicates the widget should have the normal size for widgets in macOS. This attribute is only applicable to macOS.
Qt::WA_MacSmallSize 90 Indicates the widget should have the small size for widgets in macOS. This attribute is only applicable to macOS.
Qt::WA_MacMiniSize 91 Indicates the widget should have the mini size for widgets in macOS. This attribute is only applicable to macOS.
Qt::WA_MacVariableSize 102 Indicates the widget can choose between alternative sizes for widgets to avoid clipping. This attribute is only applicable to macOS.
Qt::WA_MacBrushedMetal 46 This value is obsolete and has no effect.
Qt::WA_Mapped 11 Indicates that the widget is mapped on screen. This is set/cleared by the Qt kernel.
Qt::WA_MouseNoMask 71 Makes the widget receive mouse events for the entire widget regardless of the currently set mask, overriding QWidget::setMask(). This is not applicable for top-level windows.
Qt::WA_MouseTracking 2 Indicates that the widget has mouse tracking enabled. See QWidget::mouseTracking.
Qt::WA_Moved 43 Indicates that the widget has an explicit position. This is set/cleared by QWidget::move() and by QWidget::setGeometry().
Qt::WA_MSWindowsUseDirect3D 94 This value is obsolete and has no effect.
Qt::WA_NoBackground WA_OpaquePaintEvent This value is obsolete. Use WA_OpaquePaintEvent instead.
Qt::WA_NoChildEventsForParent 58 Indicates that the widget does not want ChildAdded or ChildRemoved events sent to its parent. This is rarely necessary but can help to avoid automatic insertion widgets like splitters and layouts. This is set by a widget's author.
Qt::WA_NoChildEventsFromChildren 39 Indicates that the widget does not want to receive ChildAdded or ChildRemoved events sent from its children. This is set by a widget's author.
Qt::WA_NoMouseReplay 54 Used for pop-up widgets. Indicates that the most recent mouse press event should not be replayed when the pop-up widget closes. The flag is set by the widget's author and cleared by the Qt kernel every time the widget receives a new mouse event.
Qt::WA_NoMousePropagation 73 Prohibits mouse events from being propagated to the widget's parent. This attribute is disabled by default.
Qt::WA_TransparentForMouseEvents 51 When enabled, this attribute disables the delivery of mouse events to the widget and its children. Mouse events are delivered to other widgets as if the widget and its children were not present in the widget hierarchy; mouse clicks and other events effectively "pass through" them. This attribute is disabled by default.
Qt::WA_NoSystemBackground 9 Indicates that the widget has no background, i.e. when the widget receives paint events, the background is not automatically repainted. Note: Unlike WA_OpaquePaintEvent, newly exposed areas are never filled with the background (e.g., after showing a window for the first time the user can see "through" it until the application processes the paint events). This flag is set or cleared by the widget's author.
Qt::WA_OpaquePaintEvent 4 Indicates that the widget paints all its pixels when it receives a paint event. Thus, it is not required for operations like updating, resizing, scrolling and focus changes to erase the widget before generating paint events. The use of WA_OpaquePaintEvent provides a small optimization by helping to reduce flicker on systems that do not support double buffering and avoiding computational cycles necessary to erase the background prior to painting. Note: Unlike WA_NoSystemBackground, WA_OpaquePaintEvent makes an effort to avoid transparent window backgrounds. This flag is set or cleared by the widget's author.
Qt::WA_OutsideWSRange 49 Indicates that the widget is outside the valid range of the window system's coordinate system. A widget outside the valid range cannot be mapped on screen. This is set/cleared by the Qt kernel.
Qt::WA_PaintOnScreen 8 Indicates that the widget wants to draw directly onto the screen. Widgets with this attribute set do not participate in composition management, i.e. they cannot be semi-transparent or shine through semi-transparent overlapping widgets. Note: This flag is only supported on X11 and it disables double buffering. On Qt for Embedded Linux, the flag only works when set on a top-level widget and it relies on support from the active screen driver. This flag is set or cleared by the widget's author. To render outside of Qt's paint system, e.g., if you require native painting primitives, you need to reimplement QWidget::paintEngine() to return 0 and set this flag.
Qt::WA_PaintUnclipped 52 Makes all painters operating on this widget unclipped. Children of this widget or other widgets in front of it do not clip the area the painter can paint on. This flag is only supported for widgets with the WA_PaintOnScreen flag set. The preferred way to do this in a cross platform way is to create a transparent widget that lies in front of the other widgets.
Qt::WA_PendingMoveEvent 34 Indicates that a move event is pending, e.g., when a hidden widget was moved. This flag is set or cleared by the Qt kernel.
Qt::WA_PendingResizeEvent 35 Indicates that a resize event is pending, e.g., when a hidden widget was resized. This flag is set or cleared by the Qt kernel.
Qt::WA_QuitOnClose 76 Makes Qt quit the application when the last widget with the attribute set has accepted closeEvent(). This behavior can be modified with the QApplication::quitOnLastWindowClosed property. By default this attribute is set for all widgets of type Qt::Window.
Qt::WA_Resized 42 Indicates that the widget has an explicit size. This flag is set or cleared by QWidget::resize() and QWidget::setGeometry().
Qt::WA_RightToLeft 56 Indicates that the layout direction for the widget is right to left.
Qt::WA_SetCursor 38 Indicates that the widget has a cursor of its own. This flag is set or cleared by QWidget::setCursor() and QWidget::unsetCursor().
Qt::WA_SetFont 37 Indicates that the widget has a font of its own. This flag is set or cleared by QWidget::setFont().
Qt::WA_SetPalette 36 Indicates that the widget has a palette of its own. This flag is set or cleared by QWidget::setPalette().
Qt::WA_SetStyle 86 Indicates that the widget has a style of its own. This flag is set or cleared by QWidget::setStyle().
Qt::WA_ShowModal 70 This attribute has been deprecated. Use QWidget::windowModality instead.
Qt::WA_StaticContents 5 Indicates that the widget contents are north-west aligned and static. On resize, such a widget will receive paint events only for parts of itself that are newly visible. This flag is set or cleared by the widget's author.
Qt::WA_StyleSheet 97 Indicates that the widget is styled using a style sheet.
Qt::WA_TabletTracking 129 Indicates that the widget has tablet tracking enabled. See QWidget::tabletTracking.
Qt::WA_TranslucentBackground 120 Indicates that the widget should have a translucent background, i.e., any non-opaque regions of the widgets will be translucent because the widget will have an alpha channel. Setting this flag causes WA_NoSystemBackground to be set. On Windows the widget also needs the Qt::FramelessWindowHint window flag to be set. This flag is set or cleared by the widget's author.
Qt::WA_UnderMouse 1 Indicates that the widget is under the mouse cursor. The value is not updated correctly during drag and drop operations. There is also a getter function, QWidget::underMouse(). This flag is set or cleared by the Qt kernel.
Qt::WA_UpdatesDisabled 10 Indicates that updates are blocked (including the system background). This flag is set or cleared by the Qt kernel. Warning: This flag must never be set or cleared by the widget's author.
Qt::WA_WindowModified 41 Indicates that the window is marked as modified. On some platforms this flag will do nothing, on others (including macOS and Windows) the window will take a modified appearance. This flag is set or cleared by QWidget::setWindowModified().
Qt::WA_WindowPropagation 80 Makes a toplevel window inherit font, palette and locale from its parent.
Qt::WA_MacAlwaysShowToolWindow 96 On macOS, show the tool window even when the application is not active. By default, all tool windows are hidden when the application is inactive.
Qt::WA_SetLocale 87 Indicates the locale should be taken into consideration in the widget.
Qt::WA_StyledBackground 93 Indicates the widget should be drawn using a styled background.
Qt::WA_ShowWithoutActivating 98 Show the widget without making it active.
Qt::WA_NativeWindow 100 Indicates that a native window is created for the widget. Enabling this flag will also force a native window for the widget's ancestors unless Qt::WA_DontCreateNativeAncestors is set.
Qt::WA_DontCreateNativeAncestors 101 Indicates that the widget's ancestors are kept non-native even though the widget itself is native.
Qt::WA_X11NetWmWindowTypeDesktop 104 Adds _NET_WM_WINDOW_TYPE_DESKTOP to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms.
Qt::WA_X11NetWmWindowTypeDock 105 Adds _NET_WM_WINDOW_TYPE_DOCK to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms.
Qt::WA_X11NetWmWindowTypeToolBar 106 Adds _NET_WM_WINDOW_TYPE_TOOLBAR to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for QToolBar.
Qt::WA_X11NetWmWindowTypeMenu 107 Adds _NET_WM_WINDOW_TYPE_MENU to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for QMenu when torn-off.
Qt::WA_X11NetWmWindowTypeUtility 108 Adds _NET_WM_WINDOW_TYPE_UTILITY to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for the Qt::Tool window type.
Qt::WA_X11NetWmWindowTypeSplash 109 Adds _NET_WM_WINDOW_TYPE_SPLASH to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for the Qt::SplashScreen window type.
Qt::WA_X11NetWmWindowTypeDialog 110 Adds _NET_WM_WINDOW_TYPE_DIALOG to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for the Qt::Dialog and Qt::Sheet window types.
Qt::WA_X11NetWmWindowTypeDropDownMenu 111 Adds _NET_WM_WINDOW_TYPE_DROPDOWN_MENU to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for QMenu objects added to a QMenuBar.
Qt::WA_X11NetWmWindowTypePopupMenu 112 Adds _NET_WM_WINDOW_TYPE_POPUP_MENU to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for QMenu.
Qt::WA_X11NetWmWindowTypeToolTip 113 Adds _NET_WM_WINDOW_TYPE_TOOLTIP to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for the Qt::ToolTip window type.
Qt::WA_X11NetWmWindowTypeNotification 114 Adds _NET_WM_WINDOW_TYPE_NOTIFICATION to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms.
Qt::WA_X11NetWmWindowTypeCombo 115 Adds _NET_WM_WINDOW_TYPE_COMBO to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for the QComboBox pop-up.
Qt::WA_X11NetWmWindowTypeDND 116 Adds _NET_WM_WINDOW_TYPE_DND to the window's _NET_WM_WINDOW_TYPE X11 window property. See http://standards.freedesktop.org/wm-spec/ for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute on the feedback widget used during a drag.
Qt::WA_MacFrameworkScaled 117 This value is obsolete and has no effect.
Qt::WA_AcceptTouchEvents 121 Allows touch events (see QTouchEvent) to be sent to the widget. Must be set on all widgets that can handle touch events. Without this attribute set, events from a touch device will be sent as mouse events.
Qt::WA_TouchPadAcceptSingleTouchEvents 123 Allows touchpad single touch events to be sent to the widget.
Qt::WA_X11DoNotAcceptFocus 126 Asks the window manager to not give focus to this top level window. This attribute has no effect on non-X11 platforms.
Qt::WA_AlwaysStackOnTop 128 Since Qt 5.4, this value forces QOpenGLWidget and QQuickWidget to be drawn last, on top of other widgets. Ignored for other type of widgets. Setting this attribute breaks the stacking order, but allows having a semi-transparent OpenGL widget with other widgets visible underneath. It is strongly recommended to call update() on the widget's top-level window after enabling or disabling this attribute.
Qt::WA_ContentsMarginsRespectsSafeArea 130 A QWidget respects the safe area margins of a window by incorporating the margins into its contents' margins by default. This means, that a QLayout will use the content area of a widget for its layout, unless the Qt::WA_LayoutOnEntireRect attribute is set. This along with a contents margin of 0 can be used on the actual layout, to allow for example a background image to underlay the status bar and other system areas on an iOS device, while still allowing child widgets of that background to be inset based on the safe area.

enum Qt::WindowFrameSection

This enum is used to describe parts of a window frame. It is returned by QGraphicsWidget::windowFrameSectionAt() to describe what section of the window frame is under the mouse.

Constant Value
Qt::NoSection 0
Qt::LeftSection 1
Qt::TopLeftSection 2
Qt::TopSection 3
Qt::TopRightSection 4
Qt::RightSection 5
Qt::BottomRightSection 6
Qt::BottomSection 7
Qt::BottomLeftSection 8
Qt::TitleBarArea 9

This enum was introduced or modified in Qt 4.4.

See also QGraphicsWidget::windowFrameEvent(), QGraphicsWidget::paintWindowFrame(), and QGraphicsWidget::windowFrameSectionAt().

enum Qt::WindowModality

This enum specifies the behavior of a modal window. A modal window is one that blocks input to other windows. Note that windows that are children of a modal window are not blocked.

The values are:

Constant Value Description
Qt::NonModal 0 The window is not modal and does not block input to other windows.
Qt::WindowModal 1 The window is modal to a single window hierarchy and blocks input to its parent window, all grandparent windows, and all siblings of its parent and grandparent windows.
Qt::ApplicationModal 2 The window is modal to the application and blocks input to all windows.

See also QWidget::windowModality and QDialog.

enum Qt::WindowState
flags Qt::WindowStates

This enum type is used to specify the current state of a top-level window.

The states are

Constant Value Description
Qt::WindowNoState 0x00000000 The window has no state set (in normal state).
Qt::WindowMinimized 0x00000001 The window is minimized (i.e. iconified).
Qt::WindowMaximized 0x00000002 The window is maximized with a frame around it.
Qt::WindowFullScreen 0x00000004 The window fills the entire screen without any frame around it.
Qt::WindowActive 0x00000008 The window is the active window, i.e. it has keyboard focus.

The WindowStates type is a typedef for QFlags<WindowState>. It stores an OR combination of WindowState values.

enum Qt::WindowType
flags Qt::WindowFlags

This enum type is used to specify various window-system properties for the widget. They are fairly unusual but necessary in a few cases. Some of these flags depend on whether the underlying window manager supports them.

The main types are

Constant Value Description
Qt::Widget 0x00000000 This is the default type for QWidget. Widgets of this type are child widgets if they have a parent, and independent windows if they have no parent. See also Qt::Window and Qt::SubWindow.
Qt::Window 0x00000001 Indicates that the widget is a window, usually with a window system frame and a title bar, irrespective of whether the widget has a parent or not. Note that it is not possible to unset this flag if the widget does not have a parent.
Qt::Dialog 0x00000002 | Window Indicates that the widget is a window that should be decorated as a dialog (i.e., typically no maximize or minimize buttons in the title bar). This is the default type for QDialog. If you want to use it as a modal dialog, it should be launched from another window, or have a parent and used with the QWidget::windowModality property. If you make it modal, the dialog will prevent other top-level windows in the application from getting any input. We refer to a top-level window that has a parent as a secondary window.
Qt::Sheet 0x00000004 | Window Indicates that the window is a sheet on macOS. Since using a sheet implies window modality, the recommended way is to use QWidget::setWindowModality(), or QDialog::open(), instead.
Qt::Drawer Sheet | Dialog Indicates that the widget is a drawer on macOS.
Qt::Popup 0x00000008 | Window Indicates that the widget is a pop-up top-level window, i.e. that it is modal, but has a window system frame appropriate for pop-up menus.
Qt::Tool Popup | Dialog Indicates that the widget is a tool window. A tool window is often a small window with a smaller than usual title bar and decoration, typically used for collections of tool buttons. If there is a parent, the tool window will always be kept on top of it. If there isn't a parent, you may consider using Qt::WindowStaysOnTopHint as well. If the window system supports it, a tool window can be decorated with a somewhat lighter frame. It can also be combined with Qt::FramelessWindowHint. On macOS, tool windows correspond to the NSPanel class of windows. This means that the window lives on a level above normal windows making it impossible to put a normal window on top of it. By default, tool windows will disappear when the application is inactive. This can be controlled by the Qt::WA_MacAlwaysShowToolWindow attribute.
Qt::ToolTip Popup | Sheet Indicates that the widget is a tooltip. This is used internally to implement tooltips.
Qt::SplashScreen ToolTip | Dialog Indicates that the window is a splash screen. This is the default type for QSplashScreen.
Qt::Desktop 0x00000010 | Window Indicates that this widget is the desktop. This is the type for QDesktopWidget.
Qt::SubWindow 0x00000012 Indicates that this widget is a sub-window, such as a QMdiSubWindow widget.
Qt::ForeignWindow 0x00000020 | Window Indicates that this window object is a handle representing a native platform window created by another process or by manually using native code.
Qt::CoverWindow 0x00000040 | Window Indicates that the window represents a cover window, which is shown when the application is minimized on some platforms.

There are also a number of flags which you can use to customize the appearance of top-level windows. These have no effect on other windows:

Constant Value Description
Qt::MSWindowsFixedSizeDialogHint 0x00000100 Gives the window a thin dialog border on Windows. This style is traditionally used for fixed-size dialogs.
Qt::MSWindowsOwnDC 0x00000200 Gives the window its own display context on Windows.
Qt::BypassWindowManagerHint 0x00000400 This flag can be used to indicate to the platform plugin that "all" window manager protocols should be disabled. This flag will behave different depending on what operating system the application is running on and what window manager is running. The flag can be used to get a native window with no configuration set.
Qt::X11BypassWindowManagerHint BypassWindowManagerHint Bypass the window manager completely. This results in a borderless window that is not managed at all (i.e., no keyboard input unless you call QWidget::activateWindow() manually).
Qt::FramelessWindowHint 0x00000800 Produces a borderless window. The user cannot move or resize a borderless window via the window system. On X11, the result of the flag is dependent on the window manager and its ability to understand Motif and/or NETWM hints. Most existing modern window managers can handle this.
Qt::NoDropShadowWindowHint 0x40000000 Disables window drop shadow on supporting platforms.

The CustomizeWindowHint flag is used to enable customization of the window controls. This flag must be set to allow the WindowTitleHint, WindowSystemMenuHint, WindowMinimizeButtonHint, WindowMaximizeButtonHint and WindowCloseButtonHint flags to be changed.

Constant Value Description
Qt::CustomizeWindowHint 0x02000000 Turns off the default window title hints.
Qt::WindowTitleHint 0x00001000 Gives the window a title bar.
Qt::WindowSystemMenuHint 0x00002000 Adds a window system menu, and possibly a close button (for example on Mac). If you need to hide or show a close button, it is more portable to use WindowCloseButtonHint.
Qt::WindowMinimizeButtonHint 0x00004000 Adds a minimize button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
Qt::WindowMaximizeButtonHint 0x00008000 Adds a maximize button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
Qt::WindowMinMaxButtonsHint WindowMinimizeButtonHint | WindowMaximizeButtonHint Adds a minimize and a maximize button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
Qt::WindowCloseButtonHint 0x08000000 Adds a close button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
Qt::WindowContextHelpButtonHint 0x00010000 Adds a context help button to dialogs. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
Qt::MacWindowToolBarButtonHint 0x10000000 On macOS adds a tool bar button (i.e., the oblong button that is on the top right of windows that have toolbars).
Qt::WindowFullscreenButtonHint 0x80000000 On macOS adds a fullscreen button.
Qt::BypassGraphicsProxyWidget 0x20000000 Prevents the window and its children from automatically embedding themselves into a QGraphicsProxyWidget if the parent widget is already embedded. You can set this flag if you want your widget to always be a toplevel widget on the desktop, regardless of whether the parent widget is embedded in a scene or not.
Qt::WindowShadeButtonHint 0x00020000 Adds a shade button in place of the minimize button if the underlying window manager supports it.
Qt::WindowStaysOnTopHint 0x00040000 Informs the window system that the window should stay on top of all other windows. Note that on some window managers on X11 you also have to pass Qt::X11BypassWindowManagerHint for this flag to work correctly.
Qt::WindowStaysOnBottomHint 0x04000000 Informs the window system that the window should stay on bottom of all other windows.

Note: On X11, this hint will work only in window managers that support _NET_WM_STATE_BELOW atom. If a window always on the bottom has a parent, the parent will also be left on the bottom. This window hint is currently not implemented for macOS.

Note: On Windows, this will work only for frameless or full-screen windows.

Constant Value Description
Qt::WindowTransparentForInput 0x00080000 Informs the window system that this window is used only for output (displaying something) and does not take input. Therefore input events should pass through as if it wasn't there.
Qt::WindowOverridesSystemGestures 0x00100000 Informs the window system that this window implements its own set of gestures and that system level gestures, like for instance three-finger desktop switching, should be disabled.
Qt::WindowDoesNotAcceptFocus 0x00200000 Informs the window system that this window should not receive the input focus.
Qt::MaximizeUsingFullscreenGeometryHint 0x00400000 Informs the window system that when maximizing the window it should use as much of the available screen geometry as possible, including areas that may be covered by system UI such as status bars or application launchers. This may result in the window being placed under these system UIs, but does not guarantee it, depending on whether or not the platform supports it. When the flag is enabled the user is responsible for taking QScreen::availableGeometry() into account, so that any UI elements in the application that require user interaction are not covered by system UI.
Qt::WindowType_Mask 0x000000ff A mask for extracting the window type part of the window flags.

The WindowFlags type is a typedef for QFlags<WindowType>. It stores an OR combination of WindowType values.

See also QWidget::windowFlags and Window Flags Example.

Function Documentation

QString Qt::convertFromPlainText(const QString &plain, Qt::WhiteSpaceMode mode = WhiteSpacePre)

Converts the plain text string plain to an HTML-formatted paragraph while preserving most of its look.

mode defines how whitespace is handled.

This function is defined in the <QTextDocument> header file.

See also escape() and mightBeRichText().

bool Qt::mightBeRichText(const QString &text)

Returns true if the string text is likely to be rich text; otherwise returns false.

This function uses a fast and therefore simple heuristic. It mainly checks whether there is something that looks like a tag before the first line break. Although the result may be correct for common cases, there is no guarantee.

This function is defined in the <QTextDocument> header file.

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