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Qt Namespace Reference
[QtCore module]

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

 #include <Qt>


flags Alignment
enum AlignmentFlag { AlignLeft, AlignRight, AlignHCenter, AlignJustify, ..., AlignVertical_Mask }
enum AnchorAttribute { AnchorName, AnchorHref }
enum AnchorPoint { AnchorLeft, AnchorHorizontalCenter, AnchorRight, AnchorTop, AnchorVerticalCenter, AnchorBottom }
enum ApplicationAttribute { AA_ImmediateWidgetCreation, AA_MSWindowsUseDirect3DByDefault, AA_DontShowIconsInMenus, AA_NativeWindows, ..., AA_S60DontConstructApplicationPanes }
enum ArrowType { NoArrow, UpArrow, DownArrow, LeftArrow, RightArrow }
enum AspectRatioMode { IgnoreAspectRatio, KeepAspectRatio, KeepAspectRatioByExpanding }
enum Axis { XAxis, YAxis, ZAxis }
enum BGMode { TransparentMode, OpaqueMode }
enum BrushStyle { NoBrush, SolidPattern, Dense1Pattern, Dense2Pattern, ..., TexturePattern }
enum CaseSensitivity { CaseInsensitive, CaseSensitive }
enum CheckState { Unchecked, PartiallyChecked, Checked }
enum ClipOperation { NoClip, ReplaceClip, IntersectClip, UniteClip }
enum ConnectionType { AutoConnection, DirectConnection, QueuedConnection, BlockingQueuedConnection, UniqueConnection, AutoCompatConnection }
enum ContextMenuPolicy { NoContextMenu, PreventContextMenu, DefaultContextMenu, ActionsContextMenu, CustomContextMenu }
enum CoordinateSystem { DeviceCoordinates, LogicalCoordinates }
enum Corner { TopLeftCorner, TopRightCorner, BottomLeftCorner, BottomRightCorner }
enum CursorShape { ArrowCursor, UpArrowCursor, CrossCursor, WaitCursor, ..., BitmapCursor }
enum DateFormat { TextDate, ISODate, SystemLocaleShortDate, SystemLocaleLongDate, ..., LocalDate }
enum DayOfWeek { Monday, Tuesday, Wednesday, Thursday, ..., Sunday }
enum DockWidgetArea { LeftDockWidgetArea, RightDockWidgetArea, TopDockWidgetArea, BottomDockWidgetArea, AllDockWidgetAreas, NoDockWidgetArea }
flags DockWidgetAreas
enum DropAction { CopyAction, MoveAction, LinkAction, ActionMask, IgnoreAction, TargetMoveAction }
flags DropActions
enum EventPriority { HighEventPriority, NormalEventPriority, LowEventPriority }
enum FillRule { OddEvenFill, WindingFill }
enum FocusPolicy { TabFocus, ClickFocus, StrongFocus, WheelFocus, NoFocus }
enum FocusReason { MouseFocusReason, TabFocusReason, BacktabFocusReason, ActiveWindowFocusReason, ..., OtherFocusReason }
enum GestureFlag { DontStartGestureOnChildren, ReceivePartialGestures }
flags GestureFlags
enum GestureState { GestureStarted, GestureUpdated, GestureFinished, GestureCanceled }
enum GestureType { TapGesture, TapAndHoldGesture, PanGesture, PinchGesture, SwipeGesture, CustomGesture }
enum GlobalColor { white, black, red, darkRed, ..., color1 }
typedef HANDLE
enum HitTestAccuracy { ExactHit, FuzzyHit }
enum ImageConversionFlag { AutoColor, ColorOnly, MonoOnly, DiffuseDither, ..., NoOpaqueDetection }
flags ImageConversionFlags
enum InputMethodHint { ImhNone, ImhHiddenText, ImhNoAutoUppercase, ImhPreferNumbers, ..., ImhExclusiveInputMask }
flags InputMethodHints
enum InputMethodQuery { ImMicroFocus, ImFont, ImCursorPosition, ImSurroundingText, ..., ImAnchorPosition }
enum ItemDataRole { DisplayRole, DecorationRole, EditRole, ToolTipRole, ..., UserRole }
enum ItemFlag { NoItemFlags, ItemIsSelectable, ItemIsEditable, ItemIsDragEnabled, ..., ItemIsTristate }
flags ItemFlags
enum ItemSelectionMode { ContainsItemShape, IntersectsItemShape, ContainsItemBoundingRect, IntersectsItemBoundingRect }
enum Key { Key_Escape, Key_Tab, Key_Backtab, Key_Backspace, ..., Key_Cancel }
enum KeyboardModifier { NoModifier, ShiftModifier, ControlModifier, AltModifier, ..., GroupSwitchModifier }
flags KeyboardModifiers
enum LayoutDirection { LeftToRight, RightToLeft }
enum MaskMode { MaskInColor, MaskOutColor }
enum MatchFlag { MatchExactly, MatchFixedString, MatchContains, MatchStartsWith, ..., MatchRecursive }
flags MatchFlags
enum MouseButton { NoButton, LeftButton, RightButton, MidButton, XButton1, XButton2 }
flags MouseButtons
enum NavigationMode { NavigationModeNone, NavigationModeKeypadTabOrder, NavigationModeKeypadDirectional, NavigationModeCursorAuto, NavigationModeCursorForceVisible }
enum Orientation { Horizontal, Vertical }
flags Orientations
enum PenCapStyle { FlatCap, SquareCap, RoundCap }
enum PenJoinStyle { MiterJoin, BevelJoin, RoundJoin, SvgMiterJoin }
enum PenStyle { NoPen, SolidLine, DashLine, DotLine, ..., CustomDashLine }
enum ScrollBarPolicy { ScrollBarAsNeeded, ScrollBarAlwaysOff, ScrollBarAlwaysOn }
enum ShortcutContext { WidgetShortcut, WidgetWithChildrenShortcut, WindowShortcut, ApplicationShortcut }
enum SizeHint { MinimumSize, PreferredSize, MaximumSize, MinimumDescent }
enum SizeMode { AbsoluteSize, RelativeSize }
enum SortOrder { AscendingOrder, DescendingOrder }
enum TextElideMode { ElideLeft, ElideRight, ElideMiddle, ElideNone }
enum TextFlag { TextSingleLine, TextDontClip, TextExpandTabs, TextShowMnemonic, ..., TextJustificationForced }
enum TextFormat { PlainText, RichText, AutoText, LogText }
enum TextInteractionFlag { NoTextInteraction, TextSelectableByMouse, TextSelectableByKeyboard, LinksAccessibleByMouse, ..., TextBrowserInteraction }
flags TextInteractionFlags
enum TileRule { StretchTile, RepeatTile, RoundTile }
enum TimeSpec { LocalTime, UTC, OffsetFromUTC }
enum ToolBarArea { LeftToolBarArea, RightToolBarArea, TopToolBarArea, BottomToolBarArea, AllToolBarAreas, NoToolBarArea }
flags ToolBarAreas
enum ToolButtonStyle { ToolButtonIconOnly, ToolButtonTextOnly, ToolButtonTextBesideIcon, ToolButtonTextUnderIcon, ToolButtonFollowStyle }
enum TouchPointState { TouchPointPressed, TouchPointMoved, TouchPointStationary, TouchPointReleased }
flags TouchPointStates
enum TransformationMode { FastTransformation, SmoothTransformation }
enum UIEffect { UI_AnimateMenu, UI_FadeMenu, UI_AnimateCombo, UI_AnimateTooltip, UI_FadeTooltip, UI_AnimateToolBox }
typedef WFlags
enum WhiteSpaceMode { WhiteSpaceNormal, WhiteSpacePre, WhiteSpaceNoWrap }
enum WidgetAttribute { WA_AcceptDrops, WA_AlwaysShowToolTips, WA_ContentsPropagated, WA_CustomWhatsThis, ..., WA_MergeSoftkeysRecursively }
flags WindowFlags
enum WindowFrameSection { NoSection, LeftSection, TopLeftSection, TopSection, ..., TitleBarArea }
enum WindowModality { NonModal, WindowModal, ApplicationModal }
enum WindowState { WindowNoState, WindowMinimized, WindowMaximized, WindowFullScreen, WindowActive }
flags WindowStates
enum WindowType { Widget, Window, Dialog, Sheet, ..., WMacNoSheet }


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

Detailed Description

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

Type Documentation

enum Qt::AlignmentFlag
flags Qt::Alignment

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

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

The horizontal flags are:

Qt::AlignLeft0x0001Aligns with the left edge.
Qt::AlignRight0x0002Aligns with the right edge.
Qt::AlignHCenter0x0004Centers horizontally in the available space.
Qt::AlignJustify0x0008Justifies the text in the available space.

The vertical flags are:

Qt::AlignTop0x0020Aligns with the top.
Qt::AlignBottom0x0040Aligns with the bottom.
Qt::AlignVCenter0x0080Centers vertically in the available space.

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

Qt::AlignCenterAlignVCenter | AlignHCenterCenters 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:

Qt::AlignAbsolute0x0010If 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::AlignLeadingAlignLeftSynonym for Qt::AlignLeft.
Qt::AlignTrailingAlignRightSynonym for Qt::AlignRight.


Qt::AlignHorizontal_MaskAlignLeft | AlignRight | AlignHCenter | AlignJustify | AlignAbsolute
Qt::AlignVertical_MaskAlignTop | AlignBottom | AlignVCenter

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::AnchorAttribute

An anchor has one or more of the following attributes:

Qt::AnchorName0the name attribute of the anchor. This attribute is used when scrolling to an anchor in the document.
Qt::AnchorHref1the href attribute of the anchor. This attribute is used when a link is clicked to determine what content to load.

enum Qt::AnchorPoint

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

Qt::AnchorLeft0The left side of a layout item.
Qt::AnchorHorizontalCenter1A "virtual" side that is centered between the left and the right side of a layout item.
Qt::AnchorRight2The right side of a layout item.
Qt::AnchorTop3The top side of a layout item.
Qt::AnchorVerticalCenter4A "virtual" side that is centered between the top and the bottom side of a layout item.
Qt::AnchorBottom5The bottom side of a layout item.

See also QGraphicsAnchorLayout.

enum Qt::ApplicationAttribute

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

Qt::AA_ImmediateWidgetCreation0Ensures that widgets are created as soon as they are constructed. By default, resources for widgets are allocated on demand to improve efficiency and minimize resource usage. Setting or clearing this attribute affects widgets constructed after the change. Setting it tells Qt to create toplevel windows immediately. Therefore, if it is important to minimize resource consumption, do not set this attribute.
Qt::AA_MSWindowsUseDirect3DByDefault1This value is obsolete and has no effect.
Qt::AA_DontShowIconsInMenus2Actions 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 Mac OS X menubar may not pick up a change in this attribute. Changes in the QAction::iconVisibleInMenu property will always be picked up.
Qt::AA_NativeWindows3Ensures that widgets have native windows.
Qt::AA_DontCreateNativeWidgetSiblings4Ensures that siblings of native widgets stay non-native unless specifically set by the Qt::WA_NativeWindow attribute.
Qt::AA_MacPluginApplication5Stops the Qt mac application from doing specific initializations that do not necessarily make sense when using Qt to author a plugin. This includes avoiding loading our nib for the main menu and not taking possession of the native menu bar. When setting this attribute to true will also set the AA_DontUseNativeMenuBar attribute to true.
Qt::AA_DontUseNativeMenuBar6All 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 Mac OS X or at the bottom in Windows CE).
Qt::AA_MacDontSwapCtrlAndMeta7On Mac OS X by default, Qt swaps the Control and Meta (Command) keys (i.e., whenever Control is pressed, Qt sends Meta, and whenever Meta is pressed Control is sent). When this attribute is true, Qt will not do the flip. QKeySequence::StandardShortcuts will also flip accordingly (i.e., QKeySequence::Copy will be Command+C on the keyboard regardless of the value set, though what is output for QKeySequence::toString(QKeySequence::PortableText) will be different).
Qt::AA_S60DontConstructApplicationPanes8Stops Qt from initializing the S60 status pane and softkey pane on Symbian. This is useful to save memory and reduce startup time for applications that will run in fullscreen mode during their whole lifetime. This attribute must be set before QApplication is constructed.

enum Qt::ArrowType


enum Qt::AspectRatioMode

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

Qt::IgnoreAspectRatio0The size is scaled freely. The aspect ratio is not preserved.
Qt::KeepAspectRatio1The size is scaled to a rectangle as large as possible inside a given rectangle, preserving the aspect ratio.
Qt::KeepAspectRatioByExpanding2The size is scaled to a rectangle as small as possible outside a given rectangle, preserving the aspect ratio.

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

enum Qt::Axis

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

Qt::XAxis0The X axis.
Qt::YAxis1The Y axis.
Qt::ZAxis2The Z axis.

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

enum Qt::BGMode

Background mode:


enum Qt::BrushStyle

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

Brush Styles

Qt::NoBrush0No brush pattern.
Qt::SolidPattern1Uniform color.
Qt::Dense1Pattern2Extremely dense brush pattern.
Qt::Dense2Pattern3Very dense brush pattern.
Qt::Dense3Pattern4Somewhat dense brush pattern.
Qt::Dense4Pattern5Half dense brush pattern.
Qt::Dense5Pattern6Somewhat sparse brush pattern.
Qt::Dense6Pattern7Very sparse brush pattern.
Qt::Dense7Pattern8Extremely sparse brush pattern.
Qt::HorPattern9Horizontal lines.
Qt::VerPattern10Vertical lines.
Qt::CrossPattern11Crossing horizontal and vertical lines.
Qt::BDiagPattern12Backward diagonal lines.
Qt::FDiagPattern13Forward diagonal lines.
Qt::DiagCrossPattern14Crossing diagonal lines.
Qt::LinearGradientPattern15Linear gradient (set using a dedicated QBrush constructor).
Qt::ConicalGradientPattern17Conical gradient (set using a dedicated QBrush constructor).
Qt::RadialGradientPattern16Radial gradient (set using a dedicated QBrush constructor).
Qt::TexturePattern24Custom pattern (see QBrush::setTexture()).

See also QBrush.

enum Qt::CaseSensitivity


enum Qt::CheckState

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

Qt::Unchecked0The item is unchecked.
Qt::PartiallyChecked1The item is partially checked. Items in hierarchical models may be partially checked if some, but not all, of their children are checked.
Qt::Checked2The item is checked.

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

enum Qt::ClipOperation

Qt::NoClip0This operation turns clipping off.
Qt::ReplaceClip1Replaces the current clip path/rect/region with the one supplied in the function call.
Qt::IntersectClip2Intersects the current clip path/rect/region with the one supplied in the function call.
Qt::UniteClip3Unites 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.

Qt::AutoConnection0(default) Same as DirectConnection, if the emitter and receiver are in the same thread. Same as QueuedConnection, if the emitter and receiver are in different threads.
Qt::DirectConnection1The slot is invoked immediately, when the signal is emitted.
Qt::QueuedConnection2The 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::BlockingQueuedConnection4Same as QueuedConnection, except the current thread blocks until the slot returns. This connection type should only be used where the emitter and receiver are in different threads. Note: Violating this rule can cause your application to deadlock.
Qt::UniqueConnection0x80Same as AutoConnection, but the connection is made only if it does not duplicate an existing connection. i.e., if the same signal is already connected to the same slot for the same pair of objects, then the connection will fail. This connection type was introduced in Qt 4.6.
Qt::AutoCompatConnection3The default type when Qt 3 support is enabled. Same as AutoConnection but will also cause warnings to be output in certain situations. See Compatibility Signals and Slots for further information.

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

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

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

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

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

enum Qt::ContextMenuPolicy

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

Qt::NoContextMenu0the widget does not feature a context menu, context menu handling is deferred to the widget's parent.
Qt::PreventContextMenu4the 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 mousePressEvent(), and mouseReleaseEvent().
Qt::DefaultContextMenu1the widget's QWidget::contextMenuEvent() handler is called.
Qt::ActionsContextMenu2the widget displays its QWidget::actions() as context menu.
Qt::CustomContextMenu3the widget emits the QWidget::customContextMenuRequested() signal.

enum Qt::CoordinateSystem

This enum specifies the coordinate system.

Qt::DeviceCoordinates0Coordinates are relative to the upper-left corner of the object's paint device.
Qt::LogicalCoordinates1Coordinates are relative to the upper-left corner of the object.

This enum was introduced in Qt 4.6.

enum Qt::Corner

This enum type specifies a corner in a rectangle:

Qt::TopLeftCorner0x00000The top-left corner of the rectangle.
Qt::TopRightCorner0x00001The top-right corner of the rectangle.
Qt::BottomLeftCorner0x00002The bottom-left corner of the rectangle.
Qt::BottomRightCorner0x00003The bottom-right corner of the rectangle.

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.

Qt::ArrowCursor0 The standard arrow cursor.
Qt::UpArrowCursor1 An arrow pointing upwards toward the top of the screen.
Qt::CrossCursor2 A crosshair cursor, typically used to help the user accurately select a point on the screen.
Qt::WaitCursor3 An hourglass or watch cursor, usually shown during operations that prevent the user from interacting with the application.
Qt::IBeamCursor4 A caret or ibeam cursor, indicating that a widget can accept and display text input.
Qt::SizeVerCursor5 A cursor used for elements that are used to vertically resize top-level windows.
Qt::SizeHorCursor6 A cursor used for elements that are used to horizontally resize top-level windows.
Qt::SizeBDiagCursor7 A cursor used for elements that are used to diagonally resize top-level windows at their top-right and bottom-left corners.
Qt::SizeFDiagCursor8 A cursor used for elements that are used to diagonally resize top-level windows at their top-left and bottom-right corners.
Qt::SizeAllCursor9 A cursor used for elements that are used to resize top-level windows in any direction.
Qt::BlankCursor10A blank/invisible cursor, typically used when the cursor shape needs to be hidden.
Qt::SplitVCursor11 A cursor used for vertical splitters, indicating that a handle can be dragged horizontally to adjust the use of available space.
Qt::SplitHCursor12 A cursor used for horizontal splitters, indicating that a handle can be dragged vertically to adjust the use of available space.
Qt::PointingHandCursor13 A pointing hand cursor that is typically used for clickable elements such as hyperlinks.
Qt::ForbiddenCursor14 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::OpenHandCursor17 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::ClosedHandCursor18 A cursor representing a closed hand, typically used to indicate that a dragging operation is in progress that involves scrolling.
Qt::WhatsThisCursor15 An arrow with a question mark, typically used to indicate the presence of What's This? help for a widget.
Qt::BusyCursor16 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.

enum Qt::DateFormat

Qt::TextDate0The default Qt format, which includes the day and month name, the day number in the month, and the year in full. The day and month names will be short, localized names. This is basically equivalent to using the date format string, "ddd MMM d yyyy". See QDate::toString() for more information.
Qt::ISODate1ISO 8601 extended format: either YYYY-MM-DD for dates or YYYY-MM-DDTHH:MM:SS for combined dates and times.
Qt::SystemLocaleShortDate?The short format used by the operating system.
Qt::SystemLocaleLongDate?The long format used by the operating system.
Qt::DefaultLocaleShortDate?The short format specified by the application's locale.
Qt::DefaultLocaleLongDate?The long format used by the application's locale.
Qt::SystemLocaleDate2This enum value is deprecated. Use Qt::SystemLocaleShortDate instead (or Qt::SystemLocaleLongDate if you want long dates).
Qt::LocaleDate?This enum value is deprecated. Use Qt::DefaultLocaleShortDate instead (or Qt::DefaultLocaleLongDate if you want long dates).
Qt::LocalDateSystemLocaleDateThis enum value is deprecated. Use Qt::SystemLocaleShortDate instead (or Qt::SystemLocaleLongDate if you want long dates).

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

enum Qt::DayOfWeek


enum Qt::DockWidgetArea
flags Qt::DockWidgetAreas


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

enum Qt::DropAction
flags Qt::DropActions

Qt::CopyAction0x1Copy the data to the target.
Qt::MoveAction0x2Move the data from the source to the target.
Qt::LinkAction0x4Create a link from the source to the target.
Qt::IgnoreAction0x0Ignore the action (do nothing with the data).
Qt::TargetMoveAction0x8002On Windows, this value is used when the ownership of the D&D data should be taken over by the target application, i.e., the source application should not delete the data.
On X11 this value is used to do a move.
TargetMoveAction is not used on the Mac.

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

enum Qt::EventPriority

This enum can be used to specify event priorities.

Qt::HighEventPriority1Events with this priority are sent before events with NormalEventPriority or LowEventPriority.
Qt::NormalEventPriority0Events with this priority are sent after events with HighEventPriority, but before events with LowEventPriority.
Qt::LowEventPriority-1Events with this priority are sent after events with HighEventPriority or NormalEventPriority.

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

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

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

     // A critical event
     CriticalEventPriority = 100 * MoreImportantEventPriority,

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

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

See also QCoreApplication::postEvent().

enum Qt::FillRule

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

Qt::OddEvenFill0Specifies 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::WindingFill1Specifies 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::FocusPolicy

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

Qt::TabFocus0x1the widget accepts focus by tabbing.
Qt::ClickFocus0x2the widget accepts focus by clicking.
Qt::StrongFocusTabFocus | ClickFocus | 0x8the widget accepts focus by both tabbing and clicking. On Mac OS X this will also be indicate that the widget accepts tab focus when in 'Text/List focus mode'.
Qt::WheelFocusStrongFocus | 0x4like Qt::StrongFocus plus the widget accepts focus by using the mouse wheel.
Qt::NoFocus0the 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.

Qt::MouseFocusReason0A mouse action occurred.
Qt::TabFocusReason1The Tab key was pressed.
Qt::BacktabFocusReason2A Backtab occurred. The input for this may include the Shift or Control keys; e.g. Shift+Tab.
Qt::ActiveWindowFocusReason3The window system made this window either active or inactive.
Qt::PopupFocusReason4The application opened/closed a pop-up that grabbed/released the keyboard focus.
Qt::ShortcutFocusReason5The user typed a label's buddy shortcut
Qt::MenuBarFocusReason6The menu bar took focus.
Qt::OtherFocusReason7Another reason, usually application-specific.

See also Keyboard Focus.

enum Qt::GestureFlag
flags Qt::GestureFlags

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

Qt::DontStartGestureOnChildren0x01By 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::ReceivePartialGestures0x02Allows 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.

This enum was introduced in Qt 4.6.

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

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

enum Qt::GestureState

This enum type describes the state of a gesture.

Qt::GestureStarted1A continuous gesture has started.
Qt::GestureUpdated2A gesture continues.
Qt::GestureFinished3A gesture has finished.
Qt::GestureCanceled4A gesture was canceled.

This enum was introduced in Qt 4.6.

See also QGesture.

enum Qt::GestureType

This enum type describes the standard gestures.

Qt::TapGesture1A Tap gesture.
Qt::TapAndHoldGesture2A Tap-And-Hold (Long-Tap) gesture.
Qt::PanGesture3A Pan gesture.
Qt::PinchGesture4A Pinch gesture.
Qt::SwipeGesture5A Swipe gesture.
Qt::CustomGesture0x0100A flag that can be used to test if the gesture is a user-defined gesture ID.

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

This enum was introduced in Qt 4.6.

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

enum Qt::GlobalColor

Qt's predefined QColor objects:

Qt::white3 White (#ffffff)
Qt::black2 Black (#000000)
Qt::red7 Red (#ff0000)
Qt::darkRed13 Dark red (#800000)
Qt::green8 Green (#00ff00)
Qt::darkGreen14 Dark green (#008000)
Qt::blue9 Blue (#0000ff)
Qt::darkBlue15 Dark blue (#000080)
Qt::cyan10 Cyan (#00ffff)
Qt::darkCyan16 Dark cyan (#008080)
Qt::magenta11 Magenta (#ff00ff)
Qt::darkMagenta17 Dark magenta (#800080)
Qt::yellow12 Yellow (#ffff00)
Qt::darkYellow18 Dark yellow (#808000)
Qt::gray5 Gray (#a0a0a4)
Qt::darkGray4 Dark gray (#808080)
Qt::lightGray6 Light gray (#c0c0c0)
Qt::transparent19a transparent black value (i.e., QColor(0, 0, 0, 0))
Qt::color000 pixel value (for bitmaps)
Qt::color111 pixel value (for bitmaps)

See also QColor.

typedef Qt::HANDLE

Platform-specific handle type for system objects. This is equivalent to void * on Mac OS X and embedded Linux, and to unsigned long on X11. On Windows it is the DWORD returned by the Win32 function getCurrentThreadId().

Warning: Using this type is not portable.

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.

Qt::ExactHit0The point at which input occurred must coincide exactly with input-sensitive parts of the document.
Qt::FuzzyHit1The point at which input occurred can lie close to input-sensitive parts of the document.

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

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):

Qt::AutoColor0x00000000(default) - If the image has depth 1 and contains only black and white pixels, the pixmap becomes monochrome.
Qt::ColorOnly0x00000003The pixmap is dithered/converted to the native display depth.
Qt::MonoOnly0x00000002The pixmap becomes monochrome. If necessary, it is dithered using the chosen dithering algorithm.

Dithering mode preference for RGB channels:

Qt::DiffuseDither0x00000000(default) - A high-quality dither.
Qt::OrderedDither0x00000010A faster, more ordered dither.
Qt::ThresholdDither0x00000020No dithering; closest color is used.

Dithering mode preference for alpha channel:

Qt::ThresholdAlphaDither0x00000000(default) - No dithering.
Qt::OrderedAlphaDither0x00000004A faster, more ordered dither.
Qt::DiffuseAlphaDither0x00000008A high-quality dither.

Color matching versus dithering preference:

Qt::PreferDither0x00000040(default when converting to a pixmap) - Always dither 32-bit images when the image is converted to 8 bits.
Qt::AvoidDither0x00000080(default when converting for the purpose of saving to file) - Dither 32-bit images only if the image has more than 256 colors and it is being converted to 8 bits.
Qt::NoOpaqueDetection0x00000100Do 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.

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

enum Qt::InputMethodHint
flags Qt::InputMethodHints

Qt::ImhNone0x0No hints.

Flags that alter the behavior:

Qt::ImhHiddenText0x1Characters should be hidden, as is typically used when entering passwords. This is automatically set when setting QLineEdit::echoMode to Password.
Qt::ImhNoAutoUppercase0x2The input method should not try to automatically switch to upper case when a sentence ends.
Qt::ImhPreferNumbers0x4Numbers are preferred (but not required).
Qt::ImhPreferUppercase0x8Upper case letters are preferred (but not required).
Qt::ImhPreferLowercase0x10Lower case letters are preferred (but not required).
Qt::ImhNoPredictiveText0x20Do not use predictive text (i.e. dictionary lookup) while typing.

Flags that restrict input (exclusive flags):

Qt::ImhDigitsOnly0x10000Only digits are allowed.
Qt::ImhFormattedNumbersOnly0x20000Only number input is allowed. This includes decimal point and minus sign.
Qt::ImhUppercaseOnly0x40000Only upper case letter input is allowed.
Qt::ImhLowercaseOnly0x80000Only lower case letter input is allowed.
Qt::ImhDialableCharactersOnly0x100000Only characters suitable for phone dialling are allowed.
Qt::ImhEmailCharactersOnly0x200000Only characters suitable for email addresses are allowed.
Qt::ImhUrlCharactersOnly0x400000Only characters suitable for URLs are allowed.


Qt::ImhExclusiveInputMask0xffff0000This mask yields nonzero if any of the exclusive flags are used.

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

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

See also QGraphicsItem::inputMethodHints().

enum Qt::InputMethodQuery

Qt::ImMicroFocus0The rectangle covering the area of the input cursor in widget coordinates.
Qt::ImFont1The currently used font for text input.
Qt::ImCursorPosition2The logical position of the cursor within the text surrounding the input area (see ImSurroundingText).
Qt::ImSurroundingText3The plain text around the input area, for example the current paragraph.
Qt::ImCurrentSelection4The currently selected text.
Qt::ImMaximumTextLength5The maximum number of characters that the widget can hold. If there is no limit, QVariant() is returned.
Qt::ImAnchorPosition6The 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.

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:

Qt::DisplayRole0The key data to be rendered in the form of text. (QString)
Qt::DecorationRole1The data to be rendered as a decoration in the form of an icon. (QColor, QIcon or QPixmap)
Qt::EditRole2The data in a form suitable for editing in an editor. (QString)
Qt::ToolTipRole3The data displayed in the item's tooltip. (QString)
Qt::StatusTipRole4The data displayed in the status bar. (QString)
Qt::WhatsThisRole5The data displayed for the item in "What's This?" mode. (QString)
Qt::SizeHintRole13The size hint for the item that will be supplied to views. (QSize)

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

Qt::FontRole6The font used for items rendered with the default delegate. (QFont)
Qt::TextAlignmentRole7The alignment of the text for items rendered with the default delegate. (Qt::AlignmentFlag)
Qt::BackgroundRole8The background brush used for items rendered with the default delegate. (QBrush)
Qt::BackgroundColorRole8This role is obsolete. Use BackgroundRole instead.
Qt::ForegroundRole9The foreground brush (text color, typically) used for items rendered with the default delegate. (QBrush)
Qt::TextColorRole9This role is obsolete. Use ForegroundRole instead.
Qt::CheckStateRole10This role is used to obtain the checked state of an item. (Qt::CheckState)

Accessibility roles (with associated types):

Qt::AccessibleTextRole11The text to be used by accessibility extensions and plugins, such as screen readers. (QString)
Qt::AccessibleDescriptionRole12A description of the item for accessibility purposes. (QString)

User roles:

Qt::UserRole32The 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:

Qt::NoItemFlags0It does not have any properties set.
Qt::ItemIsSelectable1It can be selected.
Qt::ItemIsEditable2It can be edited.
Qt::ItemIsDragEnabled4It can be dragged.
Qt::ItemIsDropEnabled8It can be used as a drop target.
Qt::ItemIsUserCheckable16It can be checked or unchecked by the user.
Qt::ItemIsEnabled32The user can interact with the item.
Qt::ItemIsTristate64The item is checkable with three separate states.

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.

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

See also QAbstractItemModel.

enum Qt::ItemSelectionMode

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

Qt::ContainsItemShape0x0The 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::IntersectsItemShape0x1The 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::ContainsItemBoundingRect0x2The 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::IntersectsItemBoundingRect0x3The output list contains both items whose bounding rectangle is fully contained inside the selection area, and items that intersect with the area's outline. This method is commonly used for determining areas that need redrawing.

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

enum Qt::Key

The key names used by Qt.

Qt::Key_Enter0x01000005Typically located on the keypad.
Qt::Key_Control0x01000021On Mac OS X, this corresponds to the Command keys.
Qt::Key_Meta0x01000022On Mac OS X, this corresponds to the Control keys. On Windows keyboards, this key is mapped to the Windows key.
Qt::Key_AltGr0x01001103On Windows, when the KeyDown event for this key is sent, the Ctrl+Alt modifiers are also set.
Qt::Key_Launch00x010000a2On X11 this key is mapped to "My Computer" (XF86XK_MyComputer) key for legacy reasons.
Qt::Key_Launch10x010000a3On X11 this key is mapped to "Calculator" (XF86XK_Calculator) key for legacy reasons.
Qt::Key_Launch20x010000a4On X11 this key is mapped to XF86XK_Launch0 key for legacy reasons.
Qt::Key_Launch30x010000a5On X11 this key is mapped to XF86XK_Launch1 key for legacy reasons.
Qt::Key_Launch40x010000a6On X11 this key is mapped to XF86XK_Launch2 key for legacy reasons.
Qt::Key_Launch50x010000a7On X11 this key is mapped to XF86XK_Launch3 key for legacy reasons.
Qt::Key_Launch60x010000a8On X11 this key is mapped to XF86XK_Launch4 key for legacy reasons.
Qt::Key_Launch70x010000a9On X11 this key is mapped to XF86XK_Launch5 key for legacy reasons.
Qt::Key_Launch80x010000aaOn X11 this key is mapped to XF86XK_Launch6 key for legacy reasons.
Qt::Key_Launch90x010000abOn X11 this key is mapped to XF86XK_Launch7 key for legacy reasons.
Qt::Key_LaunchA0x010000acOn X11 this key is mapped to XF86XK_Launch8 key for legacy reasons.
Qt::Key_LaunchB0x010000adOn X11 this key is mapped to XF86XK_Launch9 key for legacy reasons.
Qt::Key_LaunchC0x010000aeOn X11 this key is mapped to XF86XK_LaunchA key for legacy reasons.
Qt::Key_LaunchD0x010000afOn X11 this key is mapped to XF86XK_LaunchB key for legacy reasons.
Qt::Key_LaunchE0x010000b0On X11 this key is mapped to XF86XK_LaunchC key for legacy reasons.
Qt::Key_LaunchF0x010000b1On X11 this key is mapped to XF86XK_LaunchD key for legacy reasons.
Qt::Key_Calculator0x010000cbOn X11 this key is not mapped for legacy reasons. Use Qt::Key_Launch1 instead.

See also QKeyEvent::key().

enum Qt::KeyboardModifier
flags Qt::KeyboardModifiers

This enum describes the modifier keys.

Qt::NoModifier0x00000000No modifier key is pressed.
Qt::ShiftModifier0x02000000A Shift key on the keyboard is pressed.
Qt::ControlModifier0x04000000A Ctrl key on the keyboard is pressed.
Qt::AltModifier0x08000000An Alt key on the keyboard is pressed.
Qt::MetaModifier0x10000000A Meta key on the keyboard is pressed.
Qt::KeypadModifier0x20000000A keypad button is pressed.
Qt::GroupSwitchModifier0x40000000X11 only. A Mode_switch key on the keyboard is pressed.

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

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

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

See also MouseButton and Modifier.

enum Qt::LayoutDirection

Specifies the direction of Qt's layouts:

Qt::LeftToRight0Left-to-right layout.
Qt::RightToLeft1Right-to-left layout.

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

See also QApplication::setLayoutDirection() and QWidget::setLayoutDirection().

enum Qt::MaskMode

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

Qt::MaskInColor0Creates a mask where all pixels matching the given color are opaque.
Qt::MaskOutColor1Creates 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.

Qt::MatchExactly0Performs QVariant-based matching.
Qt::MatchFixedString8Performs string-based matching. String-based comparisons are case-insensitive unless the MatchCaseSensitive flag is also specified.
Qt::MatchContains1The search term is contained in the item.
Qt::MatchStartsWith2The search term matches the start of the item.
Qt::MatchEndsWith3The search term matches the end of the item.
Qt::MatchCaseSensitive16The search is case sensitive.
Qt::MatchRegExp4Performs string-based matching using a regular expression as the search term.
Qt::MatchWildcard5Performs string-based matching using a string with wildcards as the search term.
Qt::MatchWrap32Perform 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::MatchRecursive64Searches the entire hierarchy.

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

See also QString::compare() and QRegExp.

enum Qt::Modifier

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

Note: On Mac OS X, the CTRL value corresponds to the Command keys on the Macintosh keyboard, and the META value corresponds to the Control keys.

Qt::SHIFTQt::ShiftModifierThe Shift keys provided on all standard keyboards.
Qt::METAQt::MetaModifierThe Meta keys.
Qt::CTRLQt::ControlModifierThe Ctrl keys.
Qt::ALTQt::AltModifierThe normal Alt keys, but not keys like AltGr.
Qt::UNICODE_ACCEL0x00000000The shortcut is specified as a Unicode code point, not as a Qt Key.

See also KeyboardModifier and MouseButton.

enum Qt::MouseButton
flags Qt::MouseButtons

This enum type describes the different mouse buttons.

Qt::NoButton0x00000000The button state does not refer to any button (see QMouseEvent::button()).
Qt::LeftButton0x00000001The 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::RightButton0x00000002The right button.
Qt::MidButton0x00000004The middle button.
Qt::XButton10x00000008The first X button.
Qt::XButton20x00000010The second X button.

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

See also KeyboardModifier and Modifier.

enum Qt::NavigationMode

This enum type describes the mode for moving focus.

Qt::NavigationModeNone0Only the touch screen is used.
Qt::NavigationModeKeypadTabOrder1Qt::Key_Up and Qt::Key_Down are used to change focus.
Qt::NavigationModeKeypadDirectional2Qt::Key_Up, Qt::Key_Down, Qt::Key_Left and Qt::Key_Right are used to change focus.
Qt::NavigationModeCursorAuto3The 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::NavigationModeCursorForceVisible4The mouse cursor is used to change focus, it is displayed regardless of device type. The keypad is used to implement a virtual cursor, unless the device has an analog mouse type of input device (e.g. touchpad)

Note:: in 4.6, cursor navigation is only implemented for Symbian OS. On other platforms, it behaves as NavigationModeNone.

This enum was introduced in Qt 4.6.

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

enum Qt::Orientation
flags Qt::Orientations

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


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::FlatCap0x00a square line end that does not cover the end point of the line.
Qt::SquareCap0x10a square line end that covers the end point and extends beyond it by half the line width.
Qt::RoundCap0x20a rounded line end.

See also QPen.

enum Qt::PenJoinStyle

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


Qt::MiterJoin0x00The outer edges of the lines are extended to meet at an angle, and this area is filled.
Qt::BevelJoin0x40The triangular notch between the two lines is filled.
Qt::RoundJoin0x80A circular arc between the two lines is filled.
Qt::SvgMiterJoin0x100A miter join corresponding to the definition of a miter join in the SVG 1.2 Tiny specification.

See also QPen.

enum Qt::PenStyle

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


Qt::NoPen0no line at all. For example, QPainter::drawRect() fills but does not draw any boundary line.
Qt::SolidLine1A plain line.
Qt::DashLine2Dashes separated by a few pixels.
Qt::DotLine3Dots separated by a few pixels.
Qt::DashDotLine4Alternate dots and dashes.
Qt::DashDotDotLine5One dash, two dots, one dash, two dots.
Qt::CustomDashLine6A custom pattern defined using QPainterPathStroker::setDashPattern().

See also QPen.

enum Qt::ScrollBarPolicy

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

Qt::ScrollBarAsNeeded0QAbstractScrollArea shows a scroll bar when the content is too large to fit and not otherwise. This is the default.
Qt::ScrollBarAlwaysOff1QAbstractScrollArea never shows a scroll bar.
Qt::ScrollBarAlwaysOn2QAbstractScrollArea always shows a scroll bar.

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

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:

Qt::WidgetShortcut0The shortcut is active when its parent widget has focus.
Qt::WidgetWithChildrenShortcut3The 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::WindowShortcut1The shortcut is active when its parent widget is a logical subwidget of the active top-level window.
Qt::ApplicationShortcut2The shortcut is active when one of the applications windows are active.

enum Qt::SizeHint

This enum is used by QGraphicsLayoutItem::sizeHint()

Qt::MinimumSize0is used to specify the minimum size of a graphics layout item.
Qt::PreferredSize1is used to specify the preferred size of a graphics layout item.
Qt::MaximumSize2is used to specify the maximum size of a graphics layout item.
Qt::MinimumDescent3is used to specify the minimum descent of a text string in a graphics layout item.

This enum was introduced in Qt 4.4.

See also QGraphicsLayoutItem::sizeHint().

enum Qt::SizeMode

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

Qt::AbsoluteSize0Specifies the size using absolute measurements.
Qt::RelativeSize1Specifies the size relative to the bounding rectangle, typically using percentage measurements.

This enum was introduced in Qt 4.4.

enum Qt::SortOrder

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

Qt::AscendingOrder0The items are sorted ascending e.g. starts with 'AAA' ends with 'ZZZ' in Latin-1 locales
Qt::DescendingOrder1The items are sorted descending e.g. starts with 'ZZZ' ends with 'AAA' in Latin-1 locales

enum Qt::TextElideMode

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

Qt::ElideLeft0The ellipsis should appear at the beginning of the text.
Qt::ElideRight1The ellipsis should appear at the end of the text.
Qt::ElideMiddle2The ellipsis should appear in the middle of the text.
Qt::ElideNone3Ellipsis should NOT appear in the text.

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

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

enum Qt::TextFlag

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

Qt::TextSingleLine0x0100Treats all whitespace as spaces and prints just one line.
Qt::TextDontClip0x0200If it's impossible to stay within the given bounds, it prints outside.
Qt::TextExpandTabs0x0400Makes the U+0009 (ASCII tab) character move to the next tab stop.
Qt::TextShowMnemonic0x0800Displays the string "&P" as P (see QButton for an example). For an ampersand, use "&&".
Qt::TextWordWrap0x1000Breaks lines at appropriate points, e.g. at word boundaries.
Qt::TextWrapAnywhere0x2000Breaks lines anywhere, even within words.
Qt::TextHideMnemonic0x8000Same as Qt::TextShowMnemonic but doesn't draw the underlines.
Qt::TextDontPrint0x4000Treat this text as "hidden" and don't print it.
Qt::IncludeTrailingSpacesTextIncludeTrailingSpacesWhen this option is set, QTextLine::naturalTextWidth() and naturalTextRect() will return a value that includes the width of trailing spaces in the text; otherwise this width is excluded.
Qt::TextIncludeTrailingSpaces0x08000000Same as IncludeTrailingSpaces
Qt::TextJustificationForced0x10000Ensures that text lines are justified.

Always use the longest variant when computing the size of a multi-variant string.

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, e.g. 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 setTextFormat() function.

Qt::PlainText0The text string is interpreted as a plain text string.
Qt::RichText1The text string is interpreted as a rich text string.
Qt::AutoText2The text string is interpreted as for Qt::RichText if Qt::mightBeRichText() returns true, otherwise as Qt::PlainText.
Qt::LogText3A special, limited text format which is only used by Q3TextEdit in an optimized mode.

enum Qt::TextInteractionFlag
flags Qt::TextInteractionFlags

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

Qt::NoTextInteraction0No interaction with the text is possible.
Qt::TextSelectableByMouse1Text can be selected with the mouse and copied to the clipboard using a context menu or standard keyboard shortcuts.
Qt::TextSelectableByKeyboard2Text can be selected with the cursor keys on the keyboard. A text cursor is shown.
Qt::LinksAccessibleByMouse4Links can be highlighted and activated with the mouse.
Qt::LinksAccessibleByKeyboard8Links can be focused using tab and activated with enter.
Qt::TextEditable16The text is fully editable.
Qt::TextEditorInteractionTextSelectableByMouse | TextSelectableByKeyboard | TextEditableThe default for a text editor.
Qt::TextBrowserInteractionTextSelectableByMouse | LinksAccessibleByMouse | LinksAccessibleByKeyboardThe 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.

Qt::StretchTile0Scale the image to fit to the available area.
Qt::RepeatTile1Repeat the image until there is no more space. May crop the last image.
Qt::RoundTile2Similar to Repeat, but scales the image down to ensure that the last tile is not cropped.

This enum was introduced in Qt 4.6.

enum Qt::TimeSpec

Qt::LocalTime0Locale dependent time (Timezones and Daylight Savings Time).
Qt::UTC1Coordinated Universal Time, replaces Greenwich Mean Time.
Qt::OffsetFromUTC2An offset in seconds from Coordinated Universal Time.

enum Qt::ToolBarArea
flags Qt::ToolBarAreas


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.

Qt::ToolButtonIconOnly0Only display the icon.
Qt::ToolButtonTextOnly1Only display the text.
Qt::ToolButtonTextBesideIcon2The text appears beside the icon.
Qt::ToolButtonTextUnderIcon3The text appears under the icon.
Qt::ToolButtonFollowStyle4Follow the style.

enum Qt::TouchPointState
flags Qt::TouchPointStates

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

Qt::TouchPointPressed0x01The touch point is now pressed.
Qt::TouchPointMoved0x02The touch point moved.
Qt::TouchPointStationary0x04The touch point did not move.
Qt::TouchPointReleased0x08The touch point was released.

This enum was introduced in Qt 4.6.

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

enum Qt::TransformationMode

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

Qt::FastTransformation0The transformation is performed quickly, with no smoothing.
Qt::SmoothTransformation1The resulting image is transformed using bilinear filtering.

See also QImage::scaled().

enum Qt::UIEffect

This enum describes the available UI effects.

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

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

Qt::UI_AnimateMenu1Show animated menus.
Qt::UI_FadeMenu2Show faded menus.
Qt::UI_AnimateCombo3Show animated comboboxes.
Qt::UI_AnimateTooltip4Show tooltip animations.
Qt::UI_FadeTooltip5Show tooltip fading effects.

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

typedef Qt::WFlags

Synonym for Qt::WindowFlags.

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.

Qt::WhiteSpaceNormal0The whitespace mode used to display normal word wrapped text in paragraphs.
Qt::WhiteSpacePre1A preformatted text mode in which whitespace is reproduced exactly.

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

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.

Qt::WA_AcceptDrops78Allows data from drag and drop operations to be dropped onto the widget (see QWidget::setAcceptDrops()).
Qt::WA_AlwaysShowToolTips84Enables tooltips for inactive windows.
Qt::WA_ContentsPropagated3This flag is superfluous and obsolete; it no longer has any effect. Since Qt 4.1, all widgets that do not set WA_PaintOnScreen propagate their contents.
Qt::WA_CustomWhatsThis47Indicates that the widget wants to continue operating normally in "What's This?" mode. This is set by the widget's author.
Qt::WA_DeleteOnClose55Makes Qt delete this widget when the widget has accepted the close event (see QWidget::closeEvent()).
Qt::WA_Disabled0Indicates 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_DontShowOnScreen103Indicates that the widget is hidden or is not a part of the viewable Desktop.
Qt::WA_ForceDisabled32Indicates 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_ForceUpdatesDisabled59Indicates 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_GroupLeader72This attribute has been deprecated. Use QWidget::windowModality instead.
Qt::WA_Hover74Forces 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_InputMethodEnabled14Enables input methods for Asian languages. Must be set when creating custom text editing widgets. On Windows CE and Symbian this flag can be used in addition to QApplication::autoSipEnabled to automatically display the SIP when entering a widget.
Qt::WA_KeyboardFocusChange77Set on a toplevel window when the users changes focus with the keyboard (tab, backtab, or shortcut).
Qt::WA_KeyCompression33Enables 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_LayoutOnEntireRect48Indicates 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_LayoutUsesWidgetRect92Ignore the layout item rect from the style when laying out this widget with QLayout. This makes a difference in QMacStyle and QPlastiqueStyle for some widgets.
Qt::WA_MacNoClickThrough12When a widget that has this attribute set is clicked, and its window is inactive, the click will make the window active but won't be seen by the widget. Typical use of this attribute is on widgets with "destructive" actions, such as a "Delete" button. WA_MacNoClickThrough also applies to all child widgets of the widget that has it set.
Qt::WA_MacOpaqueSizeGrip85Indicates that the native Carbon size grip should be opaque instead of transparent (the default). This attribute is only applicable to Mac OS X and is set by the widget's author.
Qt::WA_MacShowFocusRect88Indicates 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 Mac OS X.
Qt::WA_MacNormalSize89Indicates the widget should have the normal size for widgets in Mac OS X. This attribute is only applicable to Mac OS X.
Qt::WA_MacSmallSize90Indicates the widget should have the small size for widgets in Mac OS X. This attribute is only applicable to Mac OS X.
Qt::WA_MacMiniSize91Indicates the widget should have the mini size for widgets in Mac OS X. This attribute is only applicable to Mac OS X.
Qt::WA_MacVariableSize102Indicates the widget can choose between alternative sizes for widgets to avoid clipping. This attribute is only applicable to Mac OS X.
Qt::WA_MacBrushedMetal46Indicates the widget should be drawn in the brushed metal style as supported by the windowing system. This attribute is only applicable to Mac OS X.
Qt::WA_Mapped11Indicates that the widget is mapped on screen. This is set/cleared by the Qt kernel.
Qt::WA_MouseNoMask71Makes 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_MouseTracking2Indicates that the widget has mouse tracking enabled. See QWidget::mouseTracking.
Qt::WA_Moved43Indicates that the widget has an explicit position. This is set/cleared by QWidget::move() and by QWidget::setGeometry().
Qt::WA_MSWindowsUseDirect3D94This value is obsolete and has no effect.
Qt::WA_NoBackgroundWA_OpaquePaintEventThis value is obsolete. Use WA_OpaquePaintEvent instead.
Qt::WA_NoChildEventsForParent58Indicates 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_NoChildEventsFromChildren39Indicates 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_NoMouseReplay54Used 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_NoMousePropagation73Prohibits mouse events from being propagated to the widget's parent. This attribute is disabled by default.
Qt::WA_TransparentForMouseEvents51When 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_NoSystemBackground9Indicates 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_OpaquePaintEvent4Indicates 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_OutsideWSRange49Indicates 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_PaintOnScreen8Indicates 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_PaintOutsidePaintEvent13Makes it possible to use QPainter to paint on the widget outside paintEvent(). This flag is not supported on Windows, Mac OS X or Embedded Linux. We recommend that you use it only when porting Qt 3 code to Qt 4.
Qt::WA_PaintUnclipped52Makes 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_PendingMoveEvent34Indicates 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_PendingResizeEvent35Indicates 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_QuitOnClose76Makes Qt quit the application when the last widget with the attribute set has accepted closeEvent(). This behavior can be modified with the QApplication::quitOnLastWindowClosed property. By default this attribute is set for all widgets of type Qt::Window.
Qt::WA_Resized42Indicates that the widget has an explicit size. This flag is set or cleared by QWidget::resize() and QWidget::setGeometry().
Qt::WA_RightToLeft56Indicates that the layout direction for the widget is right to left.
Qt::WA_SetCursor38Indicates that the widget has a cursor of its own. This flag is set or cleared by QWidget::setCursor() and QWidget::unsetCursor().
Qt::WA_SetFont37Indicates that the widget has a font of its own. This flag is set or cleared by QWidget::setFont().
Qt::WA_SetPalette36Indicates that the widget has a palette of its own. This flag is set or cleared by QWidget::setPalette().
Qt::WA_SetStyle86Indicates that the widget has a style of its own. This flag is set or cleared by QWidget::setStyle().
Qt::WA_ShowModal70This attribute has been deprecated. Use QWidget::windowModality instead.
Qt::WA_StaticContents5Indicates 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_StyleSheet97Indicates that the widget is styled using a style sheet.
Qt::WA_TranslucentBackground120Indicates that the widget should have a translucent background, i.e., any non-opaque regions of the widgets will be translucent because the widget will have an alpha channel. Setting this flag causes WA_NoSystemBackground to be set. On Windows the widget also needs the Qt::FramelessWindowHint window flag to be set. This flag is set or cleared by the widget's author.
Qt::WA_UnderMouse1Indicates 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_UpdatesDisabled10Indicates 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_WindowModified41Indicates that the window is marked as modified. On some platforms this flag will do nothing, on others (including Mac OS X and Windows) the window will take a modified appearance. This flag is set or cleared by QWidget::setWindowModified().
Qt::WA_WindowPropagation80Makes a toplevel window inherit font and palette from its parent.
Qt::WA_MacAlwaysShowToolWindow96On Mac OS X, 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_SetLocale87Indicates the locale should be taken into consideration in the widget.
Qt::WA_StyledBackground93Indicates the widget should be drawn using a styled background.
Qt::WA_ShowWithoutActivating98Show the widget without making it active.
Qt::WA_NativeWindow100Indicates 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_DontCreateNativeAncestors101Indicates that the widget's ancestors are kept non-native even though the widget itself is native.
Qt::WA_X11NetWmWindowTypeDesktop104Adds _NET_WM_WINDOW_TYPE_DESKTOP to the window's _NET_WM_WINDOW_TYPE X11 window property. See for more details. This attribute has no effect on non-X11 platforms.
Qt::WA_X11NetWmWindowTypeDock105Adds _NET_WM_WINDOW_TYPE_DOCK to the window's _NET_WM_WINDOW_TYPE X11 window property. See for more details. This attribute has no effect on non-X11 platforms.
Qt::WA_X11NetWmWindowTypeToolBar106Adds _NET_WM_WINDOW_TYPE_TOOLBAR to the window's _NET_WM_WINDOW_TYPE X11 window property. See for more details. This attribute has no effect on non-X11 platforms. Note: Qt automaticaly sets this attribute for QToolBar.
Qt::WA_X11NetWmWindowTypeMenu107Adds _NET_WM_WINDOW_TYPE_MENU to the window's _NET_WM_WINDOW_TYPE X11 window property. See 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_X11NetWmWindowTypeUtility108Adds _NET_WM_WINDOW_TYPE_UTILITY to the window's _NET_WM_WINDOW_TYPE X11 window property. See 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_X11NetWmWindowTypeSplash109Adds _NET_WM_WINDOW_TYPE_SPLASH to the window's _NET_WM_WINDOW_TYPE X11 window property. See 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_X11NetWmWindowTypeDialog110Adds _NET_WM_WINDOW_TYPE_DIALOG to the window's _NET_WM_WINDOW_TYPE X11 window property. See 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_X11NetWmWindowTypeDropDownMenu111Adds _NET_WM_WINDOW_TYPE_DROPDOWN_MENU to the window's _NET_WM_WINDOW_TYPE X11 window property. See for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for QMenus added to a QMenuBar.
Qt::WA_X11NetWmWindowTypePopupMenu112Adds _NET_WM_WINDOW_TYPE_POPUP_MENU to the window's _NET_WM_WINDOW_TYPE X11 window property. See for more details. This attribute has no effect on non-X11 platforms. Note: Qt automatically sets this attribute for QMenu.
Qt::WA_X11NetWmWindowTypeToolTip113Adds _NET_WM_WINDOW_TYPE_TOOLTIP to the window's _NET_WM_WINDOW_TYPE X11 window property. See 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_X11NetWmWindowTypeNotification114Adds _NET_WM_WINDOW_TYPE_NOTIFICATION to the window's _NET_WM_WINDOW_TYPE X11 window property. See for more details. This attribute has no effect on non-X11 platforms.
Qt::WA_X11NetWmWindowTypeCombo115Adds _NET_WM_WINDOW_TYPE_COMBO to the window's _NET_WM_WINDOW_TYPE X11 window property. See 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_X11NetWmWindowTypeDND116Adds _NET_WM_WINDOW_TYPE_DND to the window's _NET_WM_WINDOW_TYPE X11 window property. See 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_MacFrameworkScaled117Enables resolution independence aware mode on Mac when using Carbon. This attribute has no effect on Cocoa. The attribute is off by default and can be enabled on a per-window basis.
Qt::WA_AcceptTouchEvents121Allows 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_TouchPadAcceptSingleTouchEvents123Allows touchpad single touch events to be sent to the widget.
Qt::WA_MergeSoftkeys124Allows widget to merge softkeys with parent widget, i.e. widget can set only one softkeys and request softkey implementation to take rest of the softkeys from the parent. Note parents are traversed until WA_MergeSoftkeys is not set. See also Qt::WA_MergeSoftkeysRecursively This attribute currently has effect only on Symbian platforms
Qt::WA_MergeSoftkeysRecursively125Allows widget to merge softkeys recursively with all parents. If this attribute is set, the widget parents are traversed until window boundary (widget without parent or dialog) is found. This attribute currently has effect only on Symbian platforms

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.


This enum was introduced in Qt 4.4.

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

enum Qt::WindowModality

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

The values are:

Qt::NonModal0The window is not modal and does not block input to other windows.
Qt::WindowModal1The 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::ApplicationModal2The window is modal to the application and blocks input to all windows.

See also QWidget::windowModality and QDialog.

enum Qt::WindowState
flags Qt::WindowStates

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

The states are

Qt::WindowNoState0x00000000The window has no state set (in normal state).
Qt::WindowMinimized0x00000001The window is minimized (i.e. iconified).
Qt::WindowMaximized0x00000002The window is maximized with a frame around it.
Qt::WindowFullScreen0x00000004The window fills the entire screen without any frame around it.
Qt::WindowActive0x00000008The 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

Qt::Widget0x00000000This 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::Window0x00000001Indicates 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::Dialog0x00000002 | WindowIndicates 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::Sheet0x00000004 | WindowIndicates that the window is a Macintosh sheet. Since using a sheet implies window modality, the recommended way is to use QWidget::setWindowModality(), or QDialog::open(), instead.
Qt::Drawer0x00000006 | WindowIndicates that the widget is a Macintosh drawer.
Qt::Popup0x00000008 | WindowIndicates 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::Tool0x0000000a | WindowIndicates 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 Mac OS X, tool windows correspond to the Floating class of windows. This means that the window lives on a level above normal windows; 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::ToolTip0x0000000c | WindowIndicates that the widget is a tooltip. This is used internally to implement tooltips.
Qt::SplashScreen0x0000000e | WindowIndicates that the window is a splash screen. This is the default type for QSplashScreen.
Qt::Desktop0x00000010 | WindowIndicates that this widget is the desktop. This is the type for QDesktopWidget.
Qt::SubWindow0x00000012Indicates that this widget is a sub-window, such as a QMdiSubWindow widget.

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:

Qt::MSWindowsFixedSizeDialogHint0x00000100Gives the window a thin dialog border on Windows. This style is traditionally used for fixed-size dialogs.
Qt::MSWindowsOwnDC0x00000200Gives the window its own display context on Windows.
Qt::X11BypassWindowManagerHint0x00000400Bypass 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::FramelessWindowHint0x00000800Produces a borderless window. The user cannot move or resize a borderless window via the window system. On X11, the result of the flag is dependent on the window manager and its ability to understand Motif and/or NETWM hints. Most existing modern window managers can handle this.

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.

Qt::CustomizeWindowHint0x02000000Turns off the default window title hints.
Qt::WindowTitleHint0x00001000Gives the window a title bar.
Qt::WindowSystemMenuHint0x00002000Adds 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::WindowMinimizeButtonHint0x00004000Adds a minimize button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
Qt::WindowMaximizeButtonHint0x00008000Adds a maximize button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
Qt::WindowMinMaxButtonsHintWindowMinimizeButtonHint | WindowMaximizeButtonHintAdds a minimize and a maximize button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
Qt::WindowCloseButtonHint0x08000000Adds a close button. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
Qt::WindowContextHelpButtonHint0x00010000Adds a context help button to dialogs. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
Qt::MacWindowToolBarButtonHint0x10000000On Mac OS X adds a tool bar button (i.e., the oblong button that is on the top right of windows that have toolbars).
Qt::BypassGraphicsProxyWidget0x20000000Prevents 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::WindowStaysOnTopHint0x00040000Informs 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::WindowStaysOnBottomHint0x04000000Informs the window system that the window should stay on bottom of all other windows. Note that 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 Mac OS X.
Qt::WindowOkButtonHint0x00080000Adds an OK button to the window decoration of a dialog. Only supported for Windows CE.
Qt::WindowCancelButtonHint0x00100000Adds a Cancel button to the window decoration of a dialog. Only supported for Windows CE.
Qt::WindowSoftkeysVisibleHint0x40000000Makes softkeys visible when widget is fullscreen. Only supported for Symbian.
Qt::WindowSoftkeysRespondHint0x80000000Makes softkeys to receive key events even when invisible. With this hint the softkey actions are triggered even the softkeys are invisible i.e. the window is displayed with showFullscreen(). Only supported for Symbian.
Qt::WindowType_Mask0x000000ffA mask for extracting the window type part of the window flags.

Obsolete flags:

Qt::WMouseNoMask0x00080000Use Qt::WA_MouseNoMask instead.
Qt::WDestructiveClose0x00100000Use Qt::WA_DeleteOnClose instead.
Qt::WStaticContents0x00200000Use Qt::WA_StaticContents instead.
Qt::WGroupLeader0x00400000No longer needed.
Qt::WShowModal0x00800000Use QWidget::windowModality instead.
Qt::WNoMousePropagation0x01000000Use Qt::WA_NoMousePropagation instead.
Qt::WType_TopLevelWindowUse Qt::Window instead.
Qt::WType_DialogDialogUse Qt::Dialog instead.
Qt::WType_PopupPopupUse Qt::Popup instead.
Qt::WType_DesktopDesktopUse Qt::Desktop instead.
Qt::WType_MaskWindowType_MaskUse Qt::WindowType_Mask instead.
Qt::WStyle_Customize0No longer needed.
Qt::WStyle_NormalBorder0No longer needed.
Qt::WStyle_DialogBorderMSWindowsFixedSizeDialogHintUse Qt::MSWindowsFixedSizeDialogHint instead.
Qt::WStyle_NoBorderFramelessWindowHintUse Qt::FramelessWindowHint instead.
Qt::WStyle_TitleWindowTitleHintUse Qt::WindowTitleHint instead.
Qt::WStyle_SysMenuWindowSystemMenuHintUse Qt::WindowSystemMenuHint instead.
Qt::WStyle_MinimizeWindowMinimizeButtonHintUse Qt::WindowMinimizeButtonHint instead.
Qt::WStyle_MaximizeWindowMaximizeButtonHintUse Qt::WindowMaximizeButtonHint instead.
Qt::WStyle_MinMaxWStyle_Minimize | WStyle_MaximizeUse Qt::WindowMinMaxButtonsHint instead.
Qt::WStyle_ToolToolUse Qt::Tool instead.
Qt::WStyle_StaysOnTopWindowStaysOnTopHintUse Qt::WindowStaysOnTopHint instead.
Qt::WStyle_ContextHelpWindowContextHelpButtonHintUse Qt::WindowContextHelpButtonHint instead.
Qt::WPaintDesktop0No longer needed.
Qt::WPaintClever0No longer needed.
Qt::WX11BypassWMX11BypassWindowManagerHintUse Qt::X11BypassWindowManagerHint instead.
Qt::WWinOwnDCMSWindowsOwnDCUse Qt::MSWindowsOwnDC instead.
Qt::WMacSheetSheetUse Qt::Sheet instead.
Qt::WMacDrawerDrawerUse Qt::Drawer instead.
Qt::WStyle_SplashSplashScreenUse Qt::SplashScreen instead.
Qt::WNoAutoErase0No longer needed.
Qt::WRepaintNoErase0No longer needed.
Qt::WNorthWestGravityWStaticContentsUse Qt::WA_StaticContents instead.
Qt::WType_ModalDialog | WShowModalUse Qt::Dialog and QWidget::windowModality instead.
Qt::WStyle_DialogDialogUse Qt::Dialog instead.
Qt::WStyle_NoBorderExFramelessWindowHintUse Qt::FramelessWindowHint instead.
Qt::WResizeNoErase0No longer needed.
Qt::WMacNoSheet0No longer needed.

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

See also QWidget::windowFlags and Window Flags Example.

Function Documentation

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

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

mode defines how whitespace is handled.

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

See also escape() and mightBeRichText().

QString Qt::escape ( const QString & plain )

Converts the plain text string plain to a HTML string with HTML metacharacters <, >, &, and " replaced by HTML entities.


 QString plain = "#include <QtCore>"
 QString html = Qt::escape(plain);
 // html == "#include &lt;QtCore&gt;"

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

See also convertFromPlainText() and mightBeRichText().

bool Qt::mightBeRichText ( const QString & text )

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

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

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


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