Qt Namespace

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

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Publié le 26 janvier 2024 - Mis à jour le 26 janvier 2024

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Qt Namespace▲

Header: Qt
CMake:

find_package(Qt6 REQUIRED COMPONENTS Core)

target_link_libraries(mytarget PRIVATE Qt6::Core)
qmake: QT += core

Detailed Description▲

Namespaces▲

namespace Qt::Literals▲

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
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.

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, and defaults to the preference reported by the implementation of QPlatformIntegration::styleHint. To override the platform integration, set this attribute after QCoreApplication has been instantiated.
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	Keyboard shortcuts on macOS are typically based on the Command (or Cmd) keyboard modifier, represented by the ⌘ symbol. For example, the 'Copy' action is Command+C (⌘+C). To ease cross platform development Qt will by default remap Command to the Qt::ControlModifier, to align with other platforms. This allows creating keyboard shortcuts such as "Ctrl+J", which on macOS will then map to Command+J, as expected by macOS users. The actual Control (or Ctrl) modifier on macOS, represented by ⌃, is mapped to Qt::MetaModifier.

When this attribute is true Qt will not do the remapping, and pressing the Command modifier will result in Qt::MetaModifier, while pressing the Control modifier will result in Qt::ControlModifier.

Note that the QKeySequence::StandardKey sequences will always be based on the same modifier (i.e., QKeySequence::Copy will be Command+C regardless of the value set), but what is output for QKeySequence::toString() will be different.

Constant	Value	Description
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_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_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 Windows 8 and above the default value is also true, but it only applies to touch events. Mouse and window events remain unaffected by this flag. 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. Currently supported on the X11 windowing system, Windows 8 and above. The 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_DisableSessionManager	31	Disables the QSessionManager. By default Qt will connect to a running session manager for a GUI application on supported platforms, use of a session manager may be redundant for system services. This attribute must be set before QGuiApplication is constructed. This value was added in 5.14
Qt::AA_DisableNativeVirtualKeyboard	9	When this attribute is set, the native on-screen virtual keyboard will not be shown automatically when a text input widget gains focus on a system without a physical keyboard. Currently supported on the Windows platform only. This value was added in 5.15

[since 5.1] 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
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.

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.

enum Qt::BGMode▲

Background mode:

Constant
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.

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()).

enum Qt::CaseSensitivity▲

Constant
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.

[since 5.9] 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.
Qt::SingleShotConnection	0x100	This is a flag that can be combined with any one of the above connection types, using a bitwise OR. When Qt::SingleShotConnection is set, the slot is going to be called only once; the connection will be automatically broken when the signal is emitted. This flag was introduced in Qt 6.0.

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:

Sélectionnez

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.

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.

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 names in English (C locale). This effectively uses, for a date, format ddd MMM d yyyy, for a time HH:mm:ss and combines these as ddd MMM d HH:mm:ss yyyy for a date-time, with an optional zone-offset suffix, where relevant. When reading from a string, a fractional part is also recognized on the seconds of a time part, as HH:mm:ss.zzz, and some minor variants on the format may be recognized, for compatibility with earlier versions of Qt and with changes to the format planned for the future. In particular, the zone-offset suffix presently uses GMT[±tzoff] with a tzoff in HH[[:]mm] format (two-digit hour and optional two-digit minutes, with optional colon separator); this shall change to use UTC in place of GMT in a future release of Qt, so the planned UTC format is recognized.
Qt::ISODateWithMs	9	ISO 8601 extended format: uses yyyy-MM-dd for dates, HH:mm:ss.zzz for times or yyyy-MM-ddTHH:mm:ss.zzz (e.g. 2017-07-24T15:46:29.739) for combined dates and times, optionally with a time-zone suffix (Z for UTC otherwise an offset as ±HH:mm) where appropriate. When parsed, a single space, ' ', may be used in place of the 'T' separator between date and time; no other spacing characters are permitted. This format also accepts HH:mm and plain HH formats for the time part, either of which may include a fractional part, HH:mm.zzz or HH.zzz, applied to the last field present (hour or minute).
Qt::ISODate	1	ISO 8601 extended format, as for ISODateWithMs, but omitting the milliseconds (.zzz) part when converting to a string. There is no difference when reading from a string: if a fractional part is present on the last time field, either format will accept it.
Qt::RFC2822Date	8	RFC 2822, RFC 850 and RFC 1036 format: when converting dates to string form, format dd MMM yyyy is used, for times the format is HH:mm:ss. For combined date and time, these are combined as dd MMM yyyy HH:mm:ss ±tzoff (omitting the optional leading day of the week from the first format recognized). When reading from a string either [ddd,] dd MMM yyyy [HH:mm[:ss]][ ±tzoff] or ddd MMM dd[ HH:mm:ss] yyyy[ ±tzoff] will be recognized for combined dates and times, where tzoff is a timezone offset in HHmm format. Arbitrary spacing may appear before or after the text and any non-empty spacing may replace the spaces in this format. For dates and times separately, the same formats are matched and the unwanted parts are ignored. In particular, note that a time is not recognized without an accompanying date.

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 (up to 24), minute and second used to specify the time. An hour of 24, with zero for all other time fields, is understood as the start of the next day. A .zzz stands for a fractional part suffix on the preceding field, which may be separated from that field either by a comma ',' or the dot '.' shown. Precision beyond milliseconds is accepted but discarded, rounding to the nearest representable millisecond. The presence of a literal T character is used to separate the date and time when both are specified. For the TextDate and RFC2822Date formats, ddd stands for the first three letters of the name of the day of the week and MMM stands for the first three letters of the month name. The names of days and months are always in English (C locale) regardless of user preferences or system settings. The other format characters have the same meaning as for the ISODate format, except that 24 is not accepted as an hour. Parts of a format enclosed in square brackets [...] are optional; the square brackets do not form part of the format. The plus-or-minus character '±' here stands for either sign character, '-' for minus or '+' for plus.

Zone offsets are measured positive to the east of Greenwich, negative to the west, as is usual for UTC-based offset notations (conflicting with some GMT-based zones-names, such as Etc/GMT+3, which use the opposite convention).

enum Qt::DayOfWeek▲

Constant
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

Represents the areas a QDockWidget can be plugged to.

A floating dock widget with tabs can be docked anywhere.

Constant	Value	Description
Qt::LeftDockWidgetArea	0x1	The left dock area of a QMainWindow.
Qt::RightDockWidgetArea	0x2	The right dock area of a QMainWindow.
Qt::TopDockWidgetArea	0x4	The top dock area of a QMainWindow.
Qt::BottomDockWidgetArea	0x8	The bottom dock area of a QMainWindow.
Qt::AllDockWidgetAreas	DockWidgetArea_Mask	All dock widget areas (default).
Qt::NoDockWidgetArea	0	No dock widget areas.

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.

[since 5.1] 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.

[since 5.6] enum Qt::EnterKeyType▲

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

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:

Sélectionnez

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
};

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.

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 (since Qt 4.7)	0x04	Allows fine-tuning of gesture event propagation. By setting the flag when grabbing a gesture all ignored partial gestures will propagate to their parent items.

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

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.

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.

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)

Qt::HANDLE▲

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

[since 5.14] enum Qt::HighDpiScaleFactorRoundingPolicy▲

This enum describes the possible High-DPI scale factor rounding policies, which decide how non-integer scale factors (such as Windows 150%) are handled.

The active policy is set by calling QGuiApplication::setHighDdpiScaleFactorRoundingPolicy() before the application object is created.

Constant	Value	Description
Qt::HighDpiScaleFactorRoundingPolicy::Round	1	Round up for .5 and above.
Qt::HighDpiScaleFactorRoundingPolicy::Ceil	2	Always round up.
Qt::HighDpiScaleFactorRoundingPolicy::Floor	3	Always round down.
Qt::HighDpiScaleFactorRoundingPolicy::RoundPreferFloor	4	Round up for .75 and above.
Qt::HighDpiScaleFactorRoundingPolicy::PassThrough	5	Don't round.

This enum was introduced or modified in Qt 5.14.

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.

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.

enum Qt::InputMethodQuery▲

flags Qt::InputMethodQueries

Constant	Value	Description
Qt::ImEnabled	0x1	The widget accepts input method input.
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). The position does not incorporate the offset of the cursor within the preedit area, as controlled by QInputMethodEvent::Cursor.
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. The position does not incorporate the offset of the cursor within the preedit area, as controlled by QInputMethodEvent::Cursor.
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.
Qt::ImReadOnly	0x10000	The widget is read only. This value was added in Qt 6.2.

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.

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::ForegroundRole	9	The foreground brush (text color, typically) used for items rendered with the default delegate. (QBrush)
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::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.

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.

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.

enum Qt::Key▲

The key names used by Qt.

Constant	Value
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	0x01000085	A key setting the state of the media player to pause (Note: not the pause/break key)
Qt::Key_MediaTogglePlayPause	0x01000086	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
Qt::Key_Launch1	0x010000a3
Qt::Key_Launch2	0x010000a4
Qt::Key_Launch3	0x010000a5
Qt::Key_Launch4	0x010000a6
Qt::Key_Launch5	0x010000a7
Qt::Key_Launch6	0x010000a8
Qt::Key_Launch7	0x010000a9
Qt::Key_Launch8	0x010000aa
Qt::Key_Launch9	0x010000ab
Qt::Key_LaunchA	0x010000ac
Qt::Key_LaunchB	0x010000ad
Qt::Key_LaunchC	0x010000ae
Qt::Key_LaunchD	0x010000af
Qt::Key_LaunchE	0x010000b0
Qt::Key_LaunchF	0x010000b1
Qt::Key_LaunchG	0x0100010e
Qt::Key_LaunchH	0x0100010f
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
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

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 (unless activated on Windows by a command line argument). A Mode_switch key on the keyboard is pressed.

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.

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.

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.

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::MatchRegularExpression	4	Performs string-based matching using a regular expression as the search term. Uses QRegularExpression. When using this flag, a QRegularExpression object can be passed as parameter and will directly be used to perform the search. The case sensitivity flag will be ignored as the QRegularExpression object is expected to be fully configured. This enum value was added in Qt 5.15.
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.

Qt::MatchExactly, Qt::MatchContains, Qt::MatchStartsWith, Qt::MatchEndsWith, Qt::MatchRegularExpression, Qt::MatchWildcard, and Qt::MatchFixedString are mutually exclusive. The behavior achieved by setting several of them in a Qt::MatchFlags argument is undefined.

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

enum Qt::Modifier▲

flags Qt::Modifiers

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

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.

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

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::MiddleButton	0x00000004	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.

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.

[since 5.3] 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.

[since 5.3] 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.

[since 5.2] 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	Specifies the displacement delta in pixels.
Qt::ZoomNativeGesture	3	Specifies the magnification delta in percent.
Qt::SmartZoomNativeGesture	4	Boolean magnification state.
Qt::RotateNativeGesture	5	Specifies the rotation delta in degrees.
Qt::SwipeNativeGesture	6	Sent after a swipe movement.

This enum was introduced or modified in Qt 5.2.

enum Qt::NavigationMode▲

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)

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

enum Qt::Orientation▲

flags Qt::Orientations

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

Constant
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.

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.

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().

[since 5.15] enum Qt::ReturnByValueConstant▲

This is a dummy type, designed to help users transition from certain deprecated APIs to their replacement APIs.

This enum was introduced or modified in Qt 5.15.

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.)

[since 5.2] 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, and the scrolling distance did not change anymore.
Qt::ScrollMomentum	4	The user no longer touches the input device, but scrolling continues due to scroll momentum. This value was introduced in Qt 5.12.

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.

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.

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

[since 5.14] enum Qt::SplitBehaviorFlags▲

flags Qt::SplitBehavior

This enum specifies how the split() functions should behave with respect to empty strings.

Constant	Value	Description
Qt::KeepEmptyParts	0	If a field is empty, keep it in the result.
Qt::SkipEmptyParts	0x1	If a field is empty, don't include it in the result.

This enum was introduced or modified in Qt 5.14.

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

[since 5.5] 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...").

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.
Qt::MarkdownText	3	The text string is interpreted as Markdown-formatted text. This enum value was added in Qt 5.14.

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.

enum Qt::TimeSpec▲

Constant	Value	Description
Qt::LocalTime	0	Local time, controlled by a system time-zone setting.
Qt::UTC	1	Coordinated Universal Time.
Qt::OffsetFromUTC	2	An offset in seconds from Coordinated Universal Time.
Qt::TimeZone	3	A named time zone.

Both LocalTime and TimeZone will take care of transitions, such as the start and end of daylight-saving time. UTC is the standard time relative to which time-zones are usually specified: Greenwich Mean Time has zero offset from it. Neither UTC nor OffsetFromUTC has any transitions.

After a change to the system time-zone setting, the behavior of LocalTime-based QDateTime objects created before the change is undefined: QDateTime may have cached data that the change invalidates. (This is not triggered by transitions of the system time-zone.) In long-running processes, updates to the system's time-zone data (e.g. when politicians change the rules for a zone) may likewise lead to conflicts between the updated time-zone information and data cached by QDateTime objects created before the update, using either LocalTime or TimeZone.

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
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::TouchPointUnknownState	0x00	The state of the touch point is not known.
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.

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.

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

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_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_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_MacOpaqueSizeGrip	85	Indicates that the native 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_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_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	Indicates that the widget should be taken into account when deciding whether to quit the application when the last window is closed. This behavior can be modified with the QGuiApplication::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. WA_StyleSheet is set whenever a widget is subject to a style sheet, even if the style sheet did not affect the widget appearance.
Qt::WA_StyleSheetTarget	131	Indicates that the widget appearance was modified by a style sheet. WA_StyleSheet will also be set. This value was introduced in Qt 5.12.
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. As of Qt 5.0, toggling this attribute after the widget has been shown is not uniformly supported across platforms. When translucent background is desired, set the attribute early when creating the widget, and avoid altering it afterwards.
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_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 (since Qt 5.4)	128	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
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

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.

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. This feature is obsolete. Setting the flag has no effect.
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::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.

The use of this flag is not recommended in multi-monitor environments. This is because the system will enforce that the window maintains its native size when moving it across screens. This is particularly undesirable when using monitors with different resolutions.

Constant	Value	Description
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.

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.

If the window manager relies on the frame to interactively manipulate the window, the user can no longer move or resize the window via the window system, but this side effect should not be relied on. To produce a fixed size window that can not be resized, please set QWindow::setMinimumSize() and QWindow::setMaximumSize() to the same size.

Constant	Value	Description
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.

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.

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.

Function Documentation▲

[since 6.2] void beginPropertyUpdateGroup()▲

Marks the beginning of a property update group. Inside this group, changing a property does neither immediately update any dependent properties nor does it trigger change notifications. Those are instead deferred until the group is ended by a call to endPropertyUpdateGroup.

Groups can be nested. In that case, the deferral ends only after the outermost group has been ended.

Change notifications are only send after all property values affected by the group have been updated to their new values. This allows re-establishing a class invariant if multiple properties need to be updated, preventing any external observer from noticing an inconsistent state.

This function was introduced in Qt 6.2.

[since 5.14] QTextStream &Qt::bin(QTextStream &stream)▲

Calls QTextStream::setIntegerBase(2) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::bom(QTextStream &stream)▲

Toggles insertion of the Byte Order Mark on stream when QTextStream is used with a UTF encoding.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::center(QTextStream &stream)▲

Calls QTextStream::setFieldAlignment(QTextStream::AlignCenter) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::dec(QTextStream &stream)▲

Calls QTextStream::setIntegerBase(10) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 6.2] void endPropertyUpdateGroup()▲

Ends a property update group. If the outermost group has been ended, and deferred binding evaluations and notifications happen now.

Calling endPropertyUpdateGroup without a preceding call to beginPropertyUpdateGroup results in undefined behavior.

This function was introduced in Qt 6.2.

[since 5.14] QTextStream &Qt::endl(QTextStream &stream)▲

Writes '\n' to the stream and flushes the stream.

Equivalent to

Sélectionnez

stream &lt;&lt; '\n' &lt;&lt; Qt::flush;

Note: On Windows, all '\n' characters are written as '\r\n' if QTextStream's device or string is opened using the QIODevice::Text flag.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::fixed(QTextStream &stream)▲

Calls QTextStream::setRealNumberNotation(QTextStream::FixedNotation) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::flush(QTextStream &stream)▲

Calls QTextStream::flush() on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::forcepoint(QTextStream &stream)▲

Calls QTextStream::setNumberFlags(QTextStream::numberFlags() | QTextStream::ForcePoint) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::forcesign(QTextStream &stream)▲

Calls QTextStream::setNumberFlags(QTextStream::numberFlags() | QTextStream::ForceSign) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::hex(QTextStream &stream)▲

Calls QTextStream::setIntegerBase(16) on stream and returns stream.

The hex modifier can only be used for writing to streams.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::left(QTextStream &stream)▲

Calls QTextStream::setFieldAlignment(QTextStream::AlignLeft) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::lowercasebase(QTextStream &stream)▲

Calls QTextStream::setNumberFlags(QTextStream::numberFlags() & ~QTextStream::UppercaseBase) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::lowercasedigits(QTextStream &stream)▲

Calls QTextStream::setNumberFlags(QTextStream::numberFlags() & ~QTextStream::UppercaseDigits) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::noforcepoint(QTextStream &stream)▲

Calls QTextStream::setNumberFlags(QTextStream::numberFlags() & ~QTextStream::ForcePoint) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::noforcesign(QTextStream &stream)▲

Calls QTextStream::setNumberFlags(QTextStream::numberFlags() & ~QTextStream::ForceSign) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::noshowbase(QTextStream &stream)▲

Calls QTextStream::setNumberFlags(QTextStream::numberFlags() & ~QTextStream::ShowBase) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::oct(QTextStream &stream)▲

Calls QTextStream::setIntegerBase(8) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::reset(QTextStream &stream)▲

Calls QTextStream::reset() on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::right(QTextStream &stream)▲

Calls QTextStream::setFieldAlignment(QTextStream::AlignRight) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::scientific(QTextStream &stream)▲

Calls QTextStream::setRealNumberNotation(QTextStream::ScientificNotation) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::showbase(QTextStream &stream)▲

Calls QTextStream::setNumberFlags(QTextStream::numberFlags() | QTextStream::ShowBase) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::uppercasebase(QTextStream &stream)▲

Calls QTextStream::setNumberFlags(QTextStream::numberFlags() | QTextStream::UppercaseBase) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::uppercasedigits(QTextStream &stream)▲

Calls QTextStream::setNumberFlags(QTextStream::numberFlags() | QTextStream::UppercaseDigits) on stream and returns stream.

This function was introduced in Qt 5.14.

[since 5.14] QTextStream &Qt::ws(QTextStream &stream)▲

Calls skipWhiteSpace() on stream and returns stream.

This function was introduced in Qt 5.14.

Qt Namespace

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Qt Namespace▲

Detailed Description▲

Namespaces▲

namespace Qt::Literals▲

Type Documentation▲

enum Qt::AlignmentFlag▲

enum Qt::AnchorPoint▲

See Also▲

enum Qt::ApplicationAttribute▲

[since 5.1] enum Qt::ApplicationState▲

enum Qt::ArrowType▲

enum Qt::AspectRatioMode▲

See Also▲

enum Qt::Axis▲

See Also▲

enum Qt::BGMode▲

enum Qt::BrushStyle▲

See Also▲

enum Qt::CaseSensitivity▲

enum Qt::CheckState▲

See Also▲

[since 5.9] enum Qt::ChecksumType▲

enum Qt::ClipOperation▲

enum Qt::ConnectionType▲

See Also▲

enum Qt::ContextMenuPolicy▲

enum Qt::CoordinateSystem▲

enum Qt::Corner▲

enum Qt::CursorMoveStyle▲

enum Qt::CursorShape▲

enum Qt::DateFormat▲

See Also▲

enum Qt::DayOfWeek▲

enum Qt::DockWidgetArea▲

See Also▲

enum Qt::DropAction▲

[since 5.1] enum Qt::Edge▲

[since 5.6] enum Qt::EnterKeyType▲

enum Qt::EventPriority▲

See Also▲

enum Qt::FillRule▲

enum Qt::FindChildOption▲

enum Qt::FocusPolicy▲

enum Qt::FocusReason▲

See Also▲

enum Qt::GestureFlag▲

See Also▲

enum Qt::GestureState▲

See Also▲

enum Qt::GestureType▲

See Also▲

enum Qt::GlobalColor▲

See Also▲

Qt::HANDLE▲

[since 5.14] enum Qt::HighDpiScaleFactorRoundingPolicy▲

See Also▲

enum Qt::HitTestAccuracy▲

enum Qt::ImageConversionFlag▲

enum Qt::InputMethodHint▲

See Also▲

enum Qt::InputMethodQuery▲

See Also▲

enum Qt::ItemDataRole▲

enum Qt::ItemFlag▲

See Also▲

enum Qt::ItemSelectionMode▲

See Also▲

enum Qt::ItemSelectionOperation▲

See Also▲

enum Qt::Key▲

See Also▲

enum Qt::KeyboardModifier▲

See Also▲

enum Qt::LayoutDirection▲

See Also▲

enum Qt::MaskMode▲