QtCore.QMetaType Class Reference

The QMetaType class manages named types in the meta-object system. More...

Inheritance diagram for QtCore.QMetaType:

Collaboration diagram for QtCore.QMetaType:

Public Types
enum	Type {   Bool = 1, Char = 131, Double = 6, FirstCoreExtType = 128,   FirstGuiType = 63, Float = 135, Int = 2, LastCoreExtType = 138,   LastCoreType = 29, LastGuiType = 86, Long = 129, LongLong = 4,   QBitArray = 13, QBitmap = 73, QBrush = 66, QByteArray = 12,   QChar = 7, QColor = 67, QCursor = 74, QDate = 14,   QDateTime = 16, QEasingCurve = 29, QFont = 64, QIcon = 69,   QImage = 70, QKeySequence = 76, QLine = 23, QLineF = 24,   QLocale = 18, QMatrix = 80, QMatrix4x4 = 82, QObjectStar = 136,   QPalette = 68, QPen = 77, QPixmap = 65, QPoint = 25,   QPointF = 26, QPolygon = 71, QQuaternion = 86, QReal = 6,   QRect = 19, QRectF = 20, QRegExp = 27, QRegion = 72,   QSize = 21, QSizeF = 22, QSizePolicy = 75, QString = 10,   QStringList = 11, QTextFormat = 79, QTextLength = 78, QTime = 15,   QTransform = 81, QUrl = 17, QVariant = 138, QVariantHash = 28,   QVariantList = 9, QVariantMap = 8, QVector2D = 83, QVector3D = 84,   QVector4D = 85, QWidgetStar = 137, Short = 130, UChar = 134,   UInt = 3, ULong = 132, ULongLong = 5, UShort = 133,   User = 256, Void = 0, VoidStar = 128 }
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Public Member Functions
	QMetaType ()
	QMetaType (QMetaType copy)
virtual void	CreateProxy ()
new void	Dispose ()

Static Public Member Functions
static bool	IsRegistered (int type)
static int	RegisterTypedef (string typeName, int aliasId)
static int	type (string typeName)
static string	TypeName (int type)
static void	UnregisterType (string typeName)

Protected Member Functions
	QMetaType (System.Type dummy)

Protected Attributes
SmokeInvocation	interceptor

Properties
virtual System.IntPtr	SmokeObject [get, set]

Detailed Description

The QMetaType class manages named types in the meta-object system.

The class is used as a helper to marshall types in QVariant and in queued signals and slots connections. It associates a type name to a type so that it can be created and destructed dynamically at run-time. Declare new types with Q_DECLARE_METATYPE() to make them available to QVariant and other template-based functions. Call qRegisterMetaType() to make type available to non-template based functions, such as the queued signal and slot connections.

Any class or struct that has a public default constructor, a public copy constructor, and a public destructor can be registered.

The following code allocates and destructs an instance of MyClass:

int id = QMetaType::type("MyClass");

if (id != 0) {

void *myClassPtr = QMetaType::construct(id);

...

QMetaType::destroy(id, myClassPtr);

myClassPtr = 0;

}

If we want the stream operators operator<<() and operator>>() to work on QVariant objects that store custom types, the custom type must provide operator<<() and operator>>() operators.

See also Q_DECLARE_METATYPE(), QVariant::setValue(), QVariant::value(), and QVariant::fromValue().

Member Enumeration Documentation

enum QtCore.QMetaType.Type

These are the built-in types supported by QMetaType:

Additional types can be registered using Q_DECLARE_METATYPE().

See also type() and typeName().

Enumerator:

Bool	Bool
Char	Char
Double	Double
FirstCoreExtType
FirstGuiType
Float	Float
Int	Int
LastCoreExtType
LastCoreType
LastGuiType
Long	Long
LongLong	LongLong
QBitArray	QBitArray
QBitmap	QBitmap
QBrush	QBrush
QByteArray	QByteArray
QChar	QChar
QColor	QColor
QCursor	QCursor
QDate	QDate
QDateTime	QDateTime
QEasingCurve	QEasingCurve
QFont	QFont
QIcon	QIcon
QImage	QImage
QKeySequence	QKeySequence
QLine	QLine
QLineF	QLineF
QLocale	QLocale
QMatrix	QMatrix
QMatrix4x4	QMatrix4x4
QObjectStar	QObject *
QPalette	QPalette
QPen	QPen
QPixmap	QPixmap
QPoint	QPoint
QPointF	QPointF
QPolygon	QPolygon
QQuaternion	QQuaternion
QReal
QRect	QRect
QRectF	QRectF
QRegExp	QRegExp
QRegion	QRegion
QSize	QSize
QSizeF	QSizeF
QSizePolicy	QSizePolicy
QString	QString
QStringList	QStringList
QTextFormat	QTextFormat
QTextLength	QTextLength
QTime	QTime
QTransform	QTransform
QUrl	QUrl
QVariant	QVariant
QVariantHash	QVariantHash
QVariantList	QVariantList
QVariantMap	QVariantMap
QVector2D	QVector2D
QVector3D	QVector3D
QVector4D	QVector4D
QWidgetStar	QWidget *
Short	Short
UChar	Unsigned char
UInt	Unsigned int
ULong	Unsigned long
ULongLong	ULongLong
UShort	Unsigned short
User	Base value for user types
Void	Void
VoidStar	Void *

Constructor & Destructor Documentation

QtCore.QMetaType.QMetaType ( System.Type  dummy )

protected

QtCore.QMetaType.QMetaType

(

)

QtCore.QMetaType.QMetaType

(

QMetaType

copy

)

Member Function Documentation

virtual void QtCore.QMetaType.CreateProxy ( )

virtual

new void QtCore.QMetaType.Dispose

(

)

static bool QtCore.QMetaType.IsRegistered ( int  type )

static

Returns true if the datatype with ID type is registered; otherwise returns false.

See also type(), typeName(), and Type.

static int QtCore.QMetaType.RegisterTypedef ( string  typeName, int  aliasId  )

static

static int QtCore.QMetaType.type ( string  typeName )

static

Returns a handle to the type called typeName, or 0 if there is no such type.

See also isRegistered(), typeName(), and Type.

static string QtCore.QMetaType.TypeName ( int  type )

static

Returns the type name associated with the given type, or 0 if no matching type was found. The returned pointer must not be deleted.

See also type(), isRegistered(), and Type.

static void QtCore.QMetaType.UnregisterType ( string  typeName )

static

Unregisters a user type, with typeName.

This function was introduced in Qt 4.4.

See also type() and typeName().

Member Data Documentation

SmokeInvocation QtCore.QMetaType.interceptor

protected

Property Documentation

virtual System.IntPtr QtCore.QMetaType.SmokeObject

getset