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# Qt Namespace Reference
[QtCore module]

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

     #include <Qt>

- Qt 3 support members

### Types

- flags Alignment
- enum AlignmentFlag { AlignLeft, AlignRight, AlignHCenter, AlignJustify, ..., AlignVertical_Mask }
- enum AnchorAttribute { AnchorName, AnchorHref }
- enum ApplicationAttribute { AA_ImmediateWidgetCreation, AA_MSWindowsUseDirect3DByDefault }
- 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 { DirectConnection, QueuedConnection, BlockingQueuedConnection, AutoConnection }
- enum ContextMenuPolicy { NoContextMenu, PreventContextMenu, DefaultContextMenu, ActionsContextMenu, CustomContextMenu }
- enum Corner { TopLeftCorner, TopRightCorner, BottomLeftCorner, BottomRightCorner }
- enum CursorShape { ArrowCursor, UpArrowCursor, CrossCursor, WaitCursor, ..., BitmapCursor }
- enum DateFormat { TextDate, ISODate, LocalDate, SystemLocaleDate, LocaleDate }
- enum DayOfWeek { Monday, Tuesday, Wednesday, Thursday, ..., Sunday }
- enum DockWidgetArea { LeftDockWidgetArea, RightDockWidgetArea, TopDockWidgetArea, BottomDockWidgetArea, AllDockWidgetAreas, NoDockWidgetArea }
- flags DockWidgetAreas
- enum DropAction { CopyAction, MoveAction, LinkAction, ActionMask, IgnoreAction }
- 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 GlobalColor { white, black, red, darkRed, ..., color1 }
- typedef HANDLE
- enum HitTestAccuracy { ExactHit, FuzzyHit }
- enum ImageConversionFlag { AutoColor, ColorOnly, MonoOnly, DiffuseDither, ..., AvoidDither }
- flags ImageConversionFlags
- enum InputMethodQuery { ImMicroFocus, ImFont, ImCursorPosition, ImSurroundingText, ImCurrentSelection }
- enum ItemDataRole { DisplayRole, DecorationRole, EditRole, ToolTipRole, ..., UserRole }
- enum ItemFlag { ItemIsSelectable, ItemIsEditable, ItemIsDragEnabled, ItemIsDropEnabled, ..., 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 Modifier { SHIFT, META, CTRL, ALT, UNICODE_ACCEL }
- enum MouseButton { NoButton, LeftButton, RightButton, MidButton, XButton1, XButton2 }
- flags MouseButtons
- 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, WindowShortcut, ApplicationShortcut }
- 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 TimeSpec { LocalTime, UTC }
- enum ToolBarArea { LeftToolBarArea, RightToolBarArea, TopToolBarArea, BottomToolBarArea, AllToolBarAreas, NoToolBarArea }
- flags ToolBarAreas
- enum ToolButtonStyle { ToolButtonIconOnly, ToolButtonTextOnly, ToolButtonTextBesideIcon, ToolButtonTextUnderIcon }
- 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_StyledBackground }
- flags WindowFlags
- enum WindowModality { NonModal, WindowModal, ApplicationModal }
- enum WindowState { WindowNoState, WindowMinimized, WindowMaximized, WindowFullScreen, WindowActive }
- flags WindowStates
- enum WindowType { Widget, Window, Dialog, Sheet, ..., WMacNoSheet }

### Functions

- 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:

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.

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

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

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

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

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

Masks:

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

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:

Constant | Value | Description
--- | --- | ---
`Qt::AnchorName` | `0` | the name attribute of the anchor. This attribute is used when scrolling to an anchor in the document.
`Qt::AnchorHref` | `1` | the href attribute of the anchor. This attribute is used when a link is clicked to determine what content to load.

### 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_ImmediateWidgetCreation` | `0` | Ensures that widgets are created as soon as they are constructed. By default, resources for widgets are allocated on demand to improve efficiency and minimize resource usage. Setting or clearing this attribute affects widgets constructed after the change. Setting it tells Qt to create toplevel windows immediately. Therefore, if it is important to minimize resource consumption, do not set this attribute.
`Qt::AA_MSWindowsUseDirect3DByDefault` | `1` | Is a Windows specific attribute, that will make the Direct3D paint engine the default Qt widget paint engine. Note that you can toggle usage of the Direct3D engine on individual QWidgets by setting/clearing the `WA_MSWindowsUseDirect3D` attribute on a specific widget. This functionality is experimental.

### enum Qt::ArrowType

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

### enum Qt::AspectRatioMode

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

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

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

### enum Qt::Axis

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

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

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

### enum Qt::BGMode

Background mode:

Constant | Value
--- | ---
`Qt::TransparentMode` | `0`
`Qt::OpaqueMode` | `1`

### enum Qt::BrushStyle

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

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

See also QBrush.

### enum Qt::CaseSensitivity

Constant | Value
--- | ---
`Qt::CaseInsensitive` | `0`
`Qt::CaseSensitive` | `1`

### enum Qt::CheckState

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

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

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

### enum Qt::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.
`Qt::UniteClip` | `3` | Unites 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::DirectConnection` | `1` | When emitted, the signal is immediately delivered to the slot.
`Qt::QueuedConnection` | `2` | When emitted, the signal is queued until the event loop is able to deliver it to the slot.
`Qt::BlockingQueuedConnection` | `4` | Same as QueuedConnection, except that the current thread blocks until the slot has been delivered. This connection type should only be used for receivers in a different thread. Note that misuse of this type can lead to dead locks in your application.
`Qt::AutoConnection` | `0` | If the signal is emitted from the thread in which the receiving object lives, the slot is invoked directly, as with Qt::DirectConnection; otherwise the signal is queued, as with Qt::QueuedConnection.

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.

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.

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 mousePressEvent(), and 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::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::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
`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::BitmapCursor` | `24` |

### enum Qt::DateFormat

Constant | Value | Description
--- | --- | ---
`Qt::TextDate` | `0` | The default Qt format.
`Qt::ISODate` | `1` | ISO 8601 extended format (YYYY-MM-DD, or with time, YYYY-MM-DDTHH:MM:SS).
`Qt::LocalDate` | `SystemLocaleDate` | This attribute has been deprecated. Use Qt::LocaleDate or Qt::SystemLocaleDate instead.
`Qt::SystemLocaleDate` | `2` | The format used by the operating system.
`Qt::LocaleDate` | ? | The format used by the default application locale. This is the locale set with QLocale::setDefault(), or the operating system locale if no default locale has been set.

### enum Qt::DayOfWeek

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

### enum Qt::DockWidgetArea
flags Qt::DockWidgetAreas

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

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

### enum Qt::DropAction
flags Qt::DropActions

Constant | Value | Description
--- | --- | ---
`Qt::CopyAction` | `0x1` | Copy the data to the target.
`Qt::MoveAction` | `0x2` | Move the data from the source to the target.
`Qt::LinkAction` | `0x4` | Create a link from the source to the target.
`Qt::ActionMask` | `0xff` |
`Qt::IgnoreAction` | `0x0` | Ignore the action (do nothing with the data).

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.

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

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

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

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

         // A critical event
         CriticalEventPriority = 100 * MoreImportantEventPriority,

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

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

See also QCoreApplication::postEvent().

### enum Qt::FillRule

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

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

### enum Qt::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 Mac OS X 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 popup that grabbed/released the keyboard focus.
`Qt::ShortcutFocusReason` | `5` | The user typed a label's buddy shortcut
`Qt::MenuBarFocusReason` | `6` | The menu bar took focus.
`Qt::OtherFocusReason` | `7` | Another reason, usually application-specific.

See also Keyboard Focus.

### enum Qt::GlobalColor

Qt's predefined QColor objects:

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

See also QColor.

### typedef Qt::HANDLE

Platform-specific handle type for system objects. This is equivalent to `void *` on Windows and Mac OS X, and embedded Linux, and to `unsigned long` on X11.

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.

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.

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):

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 for RGB channels:

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

Dithering mode preference for alpha channel:

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

Color matching versus dithering preference:

Constant | Value | Description
--- | --- | ---
`Qt::PreferDither` | `0x00000040` | (default when converting to a pixmap) - Always dither 32-bit images when the image is converted to 8 bits.
`Qt::AvoidDither` | `0x00000080` | (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.

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

### enum Qt::InputMethodQuery

Constant | Value | Description
--- | --- | ---
`Qt::ImMicroFocus` | `0` | The rectangle covering the area of the input cursor in widget coordinates.
`Qt::ImFont` | `1` | The currently used font for text input.
`Qt::ImCursorPosition` | `2` | The logical position of the cursor within the text surrounding the input area (see ImSurroundingText).
`Qt::ImSurroundingText` | `3` | The plain text around the input area, for example the current paragraph.
`Qt::ImCurrentSelection` | `4` | The currently selected text.

### 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.

The general purpose roles are:

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

Roles describing appearance and meta data:

Constant | Value | Description
--- | --- | ---
`Qt::FontRole` | `6` | The font used for items rendered with the default delegate.
`Qt::TextAlignmentRole` | `7` | The alignment of the text for items rendered with the default delegate.
`Qt::BackgroundRole` | `8` | The background brush used for items rendered with the default delegate.
`Qt::BackgroundColorRole` | `8` | This role is obsolete. Use BackgroundRole instead.
`Qt::ForegroundRole` | `9` | The foreground brush (text color, typically) used for items rendered with the default delegate.
`Qt::TextColorRole` | `9` | This role is obsolete. Use ForegroundRole instead.
`Qt::CheckStateRole` | `10` | This role is used to obtain the checked state of an item (see Qt::CheckState).

Accessibility roles:

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

User roles:

Constant | Value | Description
--- | --- | ---
`Qt::UserRole` | `32` | The first role that can be used for application-specific purposes.

### enum Qt::ItemFlag
flags Qt::ItemFlags

This enum describes the properties of an item:

Constant | Value | Description
--- | --- | ---
`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::ItemIsTristate` | `64` | The 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.

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

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

### enum Qt::Key

The key names used by Qt.

Constant | Value | Description
--- | --- | ---
`Qt::Key_Escape` | `0x01000000` |
`Qt::Key_Tab` | `0x01000001` |
`Qt::Key_Backtab` | `0x01000002` |
`Qt::Key_Backspace` | `0x01000003` |
`Qt::Key_Return` | `0x01000004` |
`Qt::Key_Enter` | `0x01000005` |
`Qt::Key_Insert` | `0x01000006` |
`Qt::Key_Delete` | `0x01000007` |
`Qt::Key_Pause` | `0x01000008` |
`Qt::Key_Print` | `0x01000009` |
`Qt::Key_SysReq` | `0x0100000a` |
`Qt::Key_Clear` | `0x0100000b` |
`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 Mac OS X, this corresponds to the Command keys.
`Qt::Key_Meta` | `0x01000022` | On Mac OS X, this corresponds to the Control keys.
`Qt::Key_Alt` | `0x01000023` |
`Qt::Key_AltGr` | `0x01001103` |
`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_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` |
`Qt::Key_MediaStop` | `0x01000081` |
`Qt::Key_MediaPrevious` | `0x01000082` |
`Qt::Key_MediaNext` | `0x01000083` |
`Qt::Key_MediaRecord` | `0x01000084` |
`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_MediaLast` | `0x0100ffff` |
`Qt::Key_unknown` | `0x01ffffff` |
`Qt::Key_Call` | `0x01100004` |
`Qt::Key_Context1` | `0x01100000` |
`Qt::Key_Context2` | `0x01100001` |
`Qt::Key_Context3` | `0x01100002` |
`Qt::Key_Context4` | `0x01100003` |
`Qt::Key_Flip` | `0x01100006` |
`Qt::Key_Hangup` | `0x01100005` |
`Qt::Key_No` | `0x01010002` |
`Qt::Key_Select` | `0x01010000` |
`Qt::Key_Yes` | `0x01010001` |
`Qt::Key_Execute` | `0x01020003` |
`Qt::Key_Printer` | `0x01020002` |
`Qt::Key_Play` | `0x01020005` |
`Qt::Key_Sleep` | `0x01020004` |
`Qt::Key_Zoom` | `0x01020006` |
`Qt::Key_Cancel` | `0x01020001` |

See also QKeyEvent::key().

### enum Qt::KeyboardModifier
flags Qt::KeyboardModifiers

This enum describes the modifier keys.

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.

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

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:

Constant | Value | Description
--- | --- | ---
`Qt::LeftToRight` | `0` | Left-to-right layout.
`Qt::RightToLeft` | `1` | Right-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.

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

### enum Qt::MatchFlag
flags Qt::MatchFlags

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

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

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

See also QString::compare() and QRegExp.

### enum Qt::Modifier

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

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

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

See also KeyboardModifier and MouseButton.

### enum Qt::MouseButton
flags Qt::MouseButtons

This enum type describes the different mouse buttons.

Constant | Value | Description
--- | --- | ---
`Qt::NoButton` | `0x00000000` | The button state does not refer to any button (see QMouseEvent::button()).
`Qt::LeftButton` | `0x00000001` | The left button is pressed, or an event refers to the left button. (The left button may be the right button on left-handed mice.)
`Qt::RightButton` | `0x00000002` | The right button.
`Qt::MidButton` | `0x00000004` | The middle button.
`Qt::XButton1` | `0x00000008` | The first X button.
`Qt::XButton2` | `0x00000010` | The 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::Orientation
flags Qt::Orientations

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

Constant | Value
--- | ---
`Qt::Horizontal` | `0x1`
`Qt::Vertical` | `0x2`

Orientation is used with QScrollBar for example.

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

### enum Qt::PenCapStyle

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

Qt::SquareCap | Qt::FlatCap | Qt::RoundCap

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

See also QPen.

### enum Qt::PenJoinStyle

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

Qt::BevelJoin | Qt::MiterJoin | Qt::RoundJoin

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

See also QPen.

### enum Qt::PenStyle

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

Qt::SolidLine | Qt::DashLine | Qt::DotLine
Qt::DashDotLine | Qt::DashDotDotLine | Qt::CustomDashLine

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

See also QPen.

### enum Qt::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.

(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:

Constant | Value | Description
--- | --- | ---
`Qt::WidgetShortcut` | `0` | The shortcut is active when its parent widget has focus.
`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::SortOrder

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

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

### enum Qt::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://www.troll...ovingto/beijing/"), whereas Qt::ElideRight is appropriate for other strings (e.g., "Deploying Applications on Ma...").

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

### enum Qt::TextFlag

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

Constant | Value | Description
--- | --- | ---
`Qt::TextSingleLine` | `0x0100` | Treats all whitespace as spaces and prints just one line.
`Qt::TextDontClip` | `0x0200` | If it's impossible to stay within the given bounds, it prints outside.
`Qt::TextExpandTabs` | `0x0400` | Makes the U+0009 (ASCII tab) character move to the next tab stop.
`Qt::TextShowMnemonic` | `0x0800` | Displays the string "&P" as P (see QButton for an example). 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` | Don't automatically delete trailing whitespace.
`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, 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.

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 using the current Q3StyleSheet::defaultSheet().
`Qt::AutoText` | `2` | The text string is interpreted as for Qt::RichText if Qt::mightBeRichText() returns true, otherwise as Qt::PlainText.
`Qt::LogText` | `3` | A special, limited text format which is only used by QTextEdit in an optimized mode.

### 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::TimeSpec

Constant | Value | Description
--- | --- | ---
`Qt::LocalTime` | `0` | Locale dependent time (Timezones and Daylight Savings Time).
`Qt::UTC` | `1` | Coordinated Universal Time, replaces Greenwich Mean Time.

### enum Qt::ToolBarArea
flags Qt::ToolBarAreas

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

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

### enum Qt::ToolButtonStyle

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

Constant | Value | Description
--- | --- | ---
`Qt::ToolButtonIconOnly` | `0` | Only display the icon.
`Qt::ToolButtonTextOnly` | `1` | Only display the text.
`Qt::ToolButtonTextBesideIcon` | `2` | The text appears beside the icon.
`Qt::ToolButtonTextUnderIcon` | `3` | The text appears under the icon.

### enum Qt::TransformationMode

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

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

See also QImage::scaled().

### enum Qt::UIEffect

This enum describes the available UI effects.

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

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

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

See also QApplication::setEffectEnabled() and 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.

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` |

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.

Constant | Value | Description
--- | --- | ---
`Qt::WA_AcceptDrops` | `78` | Allows data from drag and drop operations to be dropped onto the widget (see QWidget::setAcceptDrops()).
`Qt::WA_AlwaysShowToolTips` | `84` | Enables tooltips for inactive windows.
`Qt::WA_ContentsPropagated` | `3` | This flag is superfluous and obsolete; it no longer has any effect. Since Qt 4.1, all widgets that do not set WA_PaintOnScreen propagate their contents.
`Qt::WA_CustomWhatsThis` | `47` | Indicates that the widget wants to continue operating normally in "What's This?" mode. This is set by the widget's author.
`Qt::WA_DeleteOnClose` | `55` | Makes Qt delete this widget when the widget has accepted the close event (see QWidget::closeEvent()).
`Qt::WA_Disabled` | `0` | Indicates that the widget is disabled, i.e. it does not receive any mouse or keyboard events. There is also a getter functions QWidget::isEnabled(). This is set/cleared by the Qt kernel.
`Qt::WA_ForceDisabled` | `32` | Indicates that the widget is explicitly disabled, i.e. it will remain disabled even when all its ancestors are set to the enabled state. This implies WA_Disabled. This is set/cleared by QWidget::setEnabled() and QWidget::setDisabled().
`Qt::WA_ForceUpdatesDisabled` | `59` | Indicates that updates are explicitly disabled for the widget; i.e. it will remain disabled even when all its ancestors are set to the updates-enabled state. This implies WA_UpdatesDisabled. This is set/cleared by QWidget::setUpdatesEnabled().
`Qt::WA_GroupLeader` | `72` | This attribute has been deprecated. Use QWidget::windowModality instead.
`Qt::WA_Hover` | `74` | Forces Qt to generate paint events when the mouse enters or leaves the widget. This feature is typically used when implementing custom styles; see the Styles example for details.
`Qt::WA_InputMethodEnabled` | `14` | Enables input methods for Asian languages. Must be set when creating custom text editing widgets.
`Qt::WA_KeyboardFocusChange` | `77` | Set on a toplevel window when the users changes focus with the keyboard (tab, backtab, or shortcut).
`Qt::WA_KeyCompression` | `33` | Enables key event compression if set, and disables it if not set. By default key compression is off, so widgets receive one key press event for each key press (or more, since autorepeat is usually on). If you turn it on and your program doesn't keep up with key input, Qt may try to compress key events so that more than one character can be processed in each event. For example, a word processor widget might receive 2, 3 or more characters in each QKeyEvent::text(), if the layout recalculation takes too long for the CPU. If a widget supports multiple character unicode input, it is always safe to turn the compression on. Qt performs key event compression only for printable characters. Qt::Modifier keys, cursor movement keys, function keys and miscellaneous action keys (e.g. Escape, Enter, Backspace, PrintScreen) will stop key event compression, even if there are more compressible key events available. Not all platforms 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. This makes a difference in QMacStyle and QPlastiqueStyle for some widgets.
`Qt::WA_MacNoClickThrough` | `12` | Indicates that the window is only activated when clicked.
`Qt::WA_MacOpaqueSizeGrip` | `85` | Indicates that the native Carbon size grip should be opaque instead of transparent (the default). This attribute is only applicable to Mac OS X 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 Mac OS X.
`Qt::WA_MacNormalSize` | `89` | Indicates the widget should have the normal size for widgets in Mac OS X. This attribute is only applicable to Mac OS X.
`Qt::WA_MacSmallSize` | `90` | Indicates the widget should have the small size for widgets in Mac OS X. This attribute is only applicable to Mac OS X.
`Qt::WA_MacMiniSize` | `91` | Indicates the widget should have the mini size for widgets in Mac OS X. This attribute is only applicable to Mac OS X.
`Qt::WA_MacBrushedMetal` | `46` | Indicates 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_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().
`Qt::WA_MouseTracking` | `2` | Indicates that the widget has mouse tracking enabled. See QWidget::mouseTracking.
`Qt::WA_Moved` | `43` | Indicates that the widget has an explicit position. This is set/cleared by QWidget::move() and by QWidget::setGeometry().
`Qt::WA_MSWindowsUseDirect3D` | `94` | Makes drawing to a widget with this attribute set use the Direct3D paint engine, if the Direct3D paint engine is available. This functionality is experimental.
`Qt::WA_NoBackground` | `WA_OpaquePaintEvent` | This value is obsolete. Use WA_OpaquePaintEvent instead.
`Qt::WA_NoChildEventsForParent` | `58` | Indicates that the widget does not want ChildAdded or ChildRemoved events sent to its parent. This is rarely necessary but can help to avoid automatic insertion widgets like splitters and layouts. This is set by a widget's author.
`Qt::WA_NoChildEventsFromChildren` | `39` | Indicates that the widget does not want to receive ChildAdded or ChildRemoved events sent from its children. This is set by a widget's author.
`Qt::WA_NoMouseReplay` | `54` | Used for popup widgets. Indicates that the most recent mouse press event should not be replayed when the popup 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.
`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). Setting this flag implicitly disables double buffering for the widget. This is set/cleared by the widget's author.
`Qt::WA_OpaquePaintEvent` | `4` | Indicates that the widget paints all its pixels when it receives a paint event. It is thus not required for operations like updating, resizing, scrolling and focus changes to erase the widget before generating paint events. Using WA_OpaquePaintEvent is a small optimization. It can help to reduce flicker on systems that do not provide double buffer support, and it avoids the computational cycles necessary to erase the background prior to paint. Note: Unlike WA_NoSystemBackground, WA_OpaquePaintEvent makes an effort to avoid transparent window backgrounds. This is set/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. This is only supported on X11. On Qtopia Core the flag currently only works when set on a top level widget and relies on support from the active screen driver. The flag is set or cleared by the widget's author. For rendering outside of Qt's paint system; e.g. if you need to use native X11 painting primitives, you need to reimplement QWidget::paintEngine() to return 0 and set this flag.
`Qt::WA_PaintOutsidePaintEvent` | `13` | Makes it possible to use QPainter to paint on the widget outside paintEvent(). This is not supported on Windows, Mac OS X or Qtopia Core. We recommend that you use this attribute only when porting Qt 3 code to Qt 4.
`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 for which the WA_PaintOnScreen flag is 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 is set/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 is set/cleared by the Qt kernel.
`Qt::WA_QuitOnClose` | `76` | Makes Qt quit the application when the last widget with the attribute set has accepted closeEvent(). This behavior can be adjusted with the QApplication::quitOnLastWindowClosed property. By default the attribute is set for all widgets of type Qt::Window.
`Qt::WA_Resized` | `42` | Indicates that the widget has an explicit size. This is set/cleared by QWidget::resize() and by 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 is set/cleared by QWidget::setCursor() and QWidget::unsetCursor().
`Qt::WA_SetFont` | `37` | Indicates that the widget has a font of its own. This is set/cleared by QWidget::setFont().
`Qt::WA_SetPalette` | `36` | Indicates that the widget has a palette of its own. This is set/cleared by QWidget::setPalette().
`Qt::WA_SetStyle` | `86` | Indicates that the widget has a style of its own. This is set/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 the newly visible part of itself. This is set/cleared by the widget's author.
`Qt::WA_StyleSheet` | `97` | Indicates that the widget is styled using a style sheet.
`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 is set/cleared by the Qt kernel.
`Qt::WA_UpdatesDisabled` | `10` | Indicates that updates are blocked (including the system background). This flag must never be set/cleared by the widget author. It is set/cleared by the Qt kernel.
`Qt::WA_WindowModified` | `41` | Indicates that the window is marked as modified. On some platforms this will mean nothing, on others (including Mac OS X and Windows) the window will take a modified appearance. This is set/cleared by QWidget::setWindowModified().
`Qt::WA_WindowPropagation` | `80` | Makes a toplevel window inherit font and palette from its parent.
`Qt::WA_MacAlwaysShowToolWindow` | `96` | On 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_SetLocale` | `87` | Indicates the local should be taken into consideration in the widget.
`Qt::WA_StyledBackground` | `93` | Indicates the widget should be drawn using a styled background.

### enum Qt::WindowModality

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

The values are:

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

See also QWidget::windowModality and QDialog.

### enum Qt::WindowState
flags Qt::WindowStates

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

The states are

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

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

### enum Qt::WindowType
flags Qt::WindowFlags

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

The main types are

Constant | Value | Description
--- | --- | ---
`Qt::Widget` | `0x00000000` | This is the default type for QWidget. Widgets of this type are child widgets if they have a parent, and independent windows if they have no parent. See also Qt::Window and Qt::SubWindow.
`Qt::Window` | `0x00000001` | Indicates that the widget is a window, usually with a window system frame and a title bar, irrespective of whether the widget has a parent or not.
`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 widget is a Macintosh sheet.
`Qt::Drawer` | `0x00000006 | Window` | Indicates that the widget is a Macintosh drawer.
`Qt::Popup` | `0x00000008 | Window` | Indicates that the widget is a popup top-level window, i.e. that it is modal, but has a window system frame appropriate for popup menus.
`Qt::Tool` | `0x0000000a | Window` | 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. It 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.
`Qt::ToolTip` | `0x0000000c | Window` | Indicates that the widget is a tooltip. This is used internally to implement tooltips.
`Qt::SplashScreen` | `0x0000000e | Window` | Indicates that the window is a splash screen. This is the default type for QSplashScreen.
`Qt::Desktop` | `0x00000010 | Window` | Indicates that this widget is the desktop. This is the type for QDesktopWidget.
`Qt::SubWindow` | `0x00000012` | Indicates that this widget is a child widget, irrespective of whether the widget has a parent or not.

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

Constant | Value | Description
--- | --- | ---
`Qt::MSWindowsFixedSizeDialogHint` | `0x00000100` | Gives the window a thin dialog border on Windows. This style is traditionally used for fixed-size dialogs.
`Qt::MSWindowsOwnDC` | `0x00000200` | Gives the window its own display context on Windows.
`Qt::X11BypassWindowManagerHint` | `0x00000400` | Bypass the window manager completely. This results in a borderless window that is not managed at all (i.e., no keyboard input unless you call QWidget::activateWindow() manually).
`Qt::FramelessWindowHint` | `0x00000800` | Produces a borderless window. The user cannot move or resize a borderless window via the window system. On X11, the result of the flag is dependent on the window manager and its ability to understand Motif and/or NETWM hints. Most existing modern window managers can handle this.
`Qt::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.
`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::WindowContextHelpButtonHint` | `0x00010000` | Adds a context help button to dialogs. On some platforms this implies Qt::WindowSystemMenuHint for it to work.
`Qt::WindowShadeButtonHint` | `0x00020000` |
`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::WindowType_Mask` | `0x000000ff` | A mask for extracting the window type part of the window flags.

Obsolete flags:

Constant | Value | Description
--- | --- | ---
`Qt::WMouseNoMask` | `0x00080000` | Use Qt::WA_MouseNoMask instead.
`Qt::WDestructiveClose` | `0x00100000` | Use Qt::WA_DeleteOnClose instead.
`Qt::WStaticContents` | `0x00200000` | Use Qt::WA_StaticContents instead.
`Qt::WGroupLeader` | `0x00400000` | No longer needed.
`Qt::WShowModal` | `0x00800000` | Use QWidget::windowModality instead.
`Qt::WNoMousePropagation` | `0x01000000` | Use Qt::WA_NoMousePropagation instead.
`Qt::WType_TopLevel` | `Window` | Use Qt::Window instead.
`Qt::WType_Dialog` | `Dialog` | Use Qt::Dialog instead.
`Qt::WType_Popup` | `Popup` | Use Qt::Popup instead.
`Qt::WType_Desktop` | `Desktop` | Use Qt::Desktop instead.
`Qt::WType_Mask` | `WindowType_Mask` | Use Qt::WindowType_Mask instead.
`Qt::WStyle_Customize` | `0` | No longer needed.
`Qt::WStyle_NormalBorder` | `0` | No longer needed.
`Qt::WStyle_DialogBorder` | `MSWindowsFixedSizeDialogHint` | Use Qt::MSWindowsFixedSizeDialogHint instead.
`Qt::WStyle_NoBorder` | `FramelessWindowHint` | Use Qt::FramelessWindowHint instead.
`Qt::WStyle_Title` | `WindowTitleHint` | Use Qt::WindowTitleHint instead.
`Qt::WStyle_SysMenu` | `WindowSystemMenuHint` | Use Qt::WindowSystemMenuHint instead.
`Qt::WStyle_Minimize` | `WindowMinimizeButtonHint` | Use Qt::WindowMinimizeButtonHint instead.
`Qt::WStyle_Maximize` | `WindowMaximizeButtonHint` | Use Qt::WindowMaximizeButtonHint instead.
`Qt::WStyle_MinMax` | `WStyle_Minimize | WStyle_Maximize` | Use Qt::WindowMinMaxButtonsHint instead.
`Qt::WStyle_Tool` | `Tool` | Use Qt::Tool instead.
`Qt::WStyle_StaysOnTop` | `WindowStaysOnTopHint` | Use Qt::WindowStaysOnTopHint instead.
`Qt::WStyle_ContextHelp` | `WindowContextHelpButtonHint` | Use Qt::WindowContextHelpButtonHint instead.
`Qt::WPaintDesktop` | `0` | No longer needed.
`Qt::WPaintClever` | `0` | No longer needed.
`Qt::WX11BypassWM` | `X11BypassWindowManagerHint` | Use Qt::X11BypassWindowManagerHint instead.
`Qt::WWinOwnDC` | `MSWindowsOwnDC` | Use Qt::MSWindowsOwnDC instead.
`Qt::WMacSheet` | `Sheet` | Use Qt::Sheet instead.
`Qt::WMacDrawer` | `Drawer` | Use Qt::Drawer instead.
`Qt::WStyle_Splash` | `SplashScreen` | Use Qt::SplashScreen instead.
`Qt::WNoAutoErase` | `0` | No longer needed.
`Qt::WRepaintNoErase` | `0` | No longer needed.
`Qt::WNorthWestGravity` | `WStaticContents` | Use Qt::WA_StaticContents instead.
`Qt::WType_Modal` | `Dialog | WShowModal` | Use Qt::Dialog and QWidget::windowModality instead.
`Qt::WStyle_Dialog` | `Dialog` | Use Qt::Dialog instead.
`Qt::WStyle_NoBorderEx` | `FramelessWindowHint` | Use Qt::FramelessWindowHint instead.
`Qt::WResizeNoErase` | `0` | No longer needed.
`Qt::WMacNoSheet` | `0` | No 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.

Example:

     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.