Qt 5.9 | Qt Core | C++ Classes | QVariant

Qt 5.9.9 Reference Documentation

# Obsolete Members for QVariant

The following members of class QVariant are obsolete. They are provided to keep old source code working. We strongly advise against using them in new code.

## Public Types

`(obsolete)` enum | Type { Invalid, BitArray, Bitmap, Bool, ..., UserType }

## Related Non-Members

`(obsolete)` bool | qVariantCanConvert(const QVariant &value)
`(obsolete)` QVariant | qVariantFromValue(const T &value)
`(obsolete)` void | qVariantSetValue(QVariant &variant, const T &value)
`(obsolete)` T | qVariantValue(const QVariant &value)

## Member Type Documentation

### enum QVariant::Type

This enum type defines the types of variable that a QVariant can contain.

Constant | Value | Description
--- | --- | ---
`QVariant::Invalid` | `QMetaType::UnknownType` | no type
`QVariant::BitArray` | `QMetaType::QBitArray` | a QBitArray
`QVariant::Bitmap` | `QMetaType::QBitmap` | a QBitmap
`QVariant::Bool` | `QMetaType::Bool` | a bool
`QVariant::Brush` | `QMetaType::QBrush` | a QBrush
`QVariant::ByteArray` | `QMetaType::QByteArray` | a QByteArray
`QVariant::Char` | `QMetaType::QChar` | a QChar
`QVariant::Color` | `QMetaType::QColor` | a QColor
`QVariant::Cursor` | `QMetaType::QCursor` | a QCursor
`QVariant::Date` | `QMetaType::QDate` | a QDate
`QVariant::DateTime` | `QMetaType::QDateTime` | a QDateTime
`QVariant::Double` | `QMetaType::Double` | a double
`QVariant::EasingCurve` | `QMetaType::QEasingCurve` | a QEasingCurve
`QVariant::Uuid` | `QMetaType::QUuid` | a QUuid
`QVariant::ModelIndex` | `QMetaType::QModelIndex` | a QModelIndex
`QVariant::PersistentModelIndex` | `QMetaType::QPersistentModelIndex` | a QPersistentModelIndex (since 5.5)
`QVariant::Font` | `QMetaType::QFont` | a QFont
`QVariant::Hash` | `QMetaType::QVariantHash` | a QVariantHash
`QVariant::Icon` | `QMetaType::QIcon` | a QIcon
`QVariant::Image` | `QMetaType::QImage` | a QImage
`QVariant::Int` | `QMetaType::Int` | an int
`QVariant::KeySequence` | `QMetaType::QKeySequence` | a QKeySequence
`QVariant::Line` | `QMetaType::QLine` | a QLine
`QVariant::LineF` | `QMetaType::QLineF` | a QLineF
`QVariant::List` | `QMetaType::QVariantList` | a QVariantList
`QVariant::Locale` | `QMetaType::QLocale` | a QLocale
`QVariant::LongLong` | `QMetaType::LongLong` | a qlonglong
`QVariant::Map` | `QMetaType::QVariantMap` | a QVariantMap
`QVariant::Matrix` | `QMetaType::QMatrix` | a QMatrix
`QVariant::Transform` | `QMetaType::QTransform` | a QTransform
`QVariant::Matrix4x4` | `QMetaType::QMatrix4x4` | a QMatrix4x4
`QVariant::Palette` | `QMetaType::QPalette` | a QPalette
`QVariant::Pen` | `QMetaType::QPen` | a QPen
`QVariant::Pixmap` | `QMetaType::QPixmap` | a QPixmap
`QVariant::Point` | `QMetaType::QPoint` | a QPoint
`QVariant::PointF` | `QMetaType::QPointF` | a QPointF
`QVariant::Polygon` | `QMetaType::QPolygon` | a QPolygon
`QVariant::PolygonF` | `QMetaType::QPolygonF` | a QPolygonF
`QVariant::Quaternion` | `QMetaType::QQuaternion` | a QQuaternion
`QVariant::Rect` | `QMetaType::QRect` | a QRect
`QVariant::RectF` | `QMetaType::QRectF` | a QRectF
`QVariant::RegExp` | `QMetaType::QRegExp` | a QRegExp
`QVariant::RegularExpression` | `QMetaType::QRegularExpression` | a QRegularExpression
`QVariant::Region` | `QMetaType::QRegion` | a QRegion
`QVariant::Size` | `QMetaType::QSize` | a QSize
`QVariant::SizeF` | `QMetaType::QSizeF` | a QSizeF
`QVariant::SizePolicy` | `QMetaType::QSizePolicy` | a QSizePolicy
`QVariant::String` | `QMetaType::QString` | a QString
`QVariant::StringList` | `QMetaType::QStringList` | a QStringList
`QVariant::TextFormat` | `QMetaType::QTextFormat` | a QTextFormat
`QVariant::TextLength` | `QMetaType::QTextLength` | a QTextLength
`QVariant::Time` | `QMetaType::QTime` | a QTime
`QVariant::UInt` | `QMetaType::UInt` | a uint
`QVariant::ULongLong` | `QMetaType::ULongLong` | a qulonglong
`QVariant::Url` | `QMetaType::QUrl` | a QUrl
`QVariant::Vector2D` | `QMetaType::QVector2D` | a QVector2D
`QVariant::Vector3D` | `QMetaType::QVector3D` | a QVector3D
`QVariant::Vector4D` | `QMetaType::QVector4D` | a QVector4D
`QVariant::UserType` | `QMetaType::User` | Base value for user-defined types.

## Related Non-Members

### bool qVariantCanConvert(const QVariant &value)

Returns `true` if the given value can be converted to the template type specified; otherwise returns `false`.

This function is equivalent to QVariant::canConvert(value).

Note: This function was provided as a workaround for MSVC 6 which did not support member template functions. It is advised to use the other form in new code.

See also QVariant::canConvert().

### QVariant qVariantFromValue(const T &value)

Returns a variant containing a copy of the given value with template type `T`.

This function is equivalent to QVariant::fromValue(value).

Note: This function was provided as a workaround for MSVC 6 which did not support member template functions. It is advised to use the other form in new code.

For example, a QObject pointer can be stored in a variant with the following code:

      QObject *object = getObjectFromSomewhere();
      QVariant data = QVariant::fromValue(object);

See also QVariant::fromValue().

### void qVariantSetValue(QVariant &variant, const T &value)

Sets the contents of the given variant to a copy of the value with the specified template type `T`.

This function is equivalent to QVariant::setValue(value).

Note: This function was provided as a workaround for MSVC 6 which did not support member template functions. It is advised to use the other form in new code.

See also QVariant::setValue().

### T qVariantValue(const QVariant &value)

Returns the given value converted to the template type `T`.

This function is equivalent to QVariant::value<T>(value).

Note: This function was provided as a workaround for MSVC 6 which did not support member template functions. It is advised to use the other form in new code.

See also QVariant::value() and qvariant_cast().