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Implicitly Shared Classes

These classes are normally-heavy classes which in Qt have been optimized by the use of reference counter and common data so they can be passed around.

The only important effect is that the classes listed here can be passed around as arguments efficiently, even though they may seem heavyweight.

QBitArray	Array of bits
QBrush	Defines the fill pattern of shapes drawn by a QPainter
QByteArray	Array of bytes
QCache	Template class that provides a cache
QCursor	Mouse cursor with an arbitrary shape
QFont	Font used for drawing text
QFontInfo	General information about fonts
QFontMetrics	Font metrics information
QFontMetricsF	Font metrics information
QHash	Template class that provides a hash-table-based dictionary
QIcon	Scalable icons in different modes and states
QImage	Hardware-independent pixmap that allows direct access to the pixel data, and can be used as a paint device
QLinkedList	Template class that provides linked lists
QList	Template class that provides lists
QMap	Template class that provides a skip-list-based dictionary
QMultiHash	Convenience QHash subclass that provides multi-valued hashes
QMultiMap	Convenience QMap subclass that provides multi-valued maps
QPair	Template class that stores a pair of items
QPalette	Color groups for each widget state
QPen	Defines how a QPainter should draw lines and outlines of shapes
QPicture	Paint device that records and replays QPainter commands
QPixmap	Off-screen, pixel-based paint device
QPolygon	Vector of points
QPolygonF	Vector of floating point points
QQueue	Generic container that provides a queue
QRegExp	Pattern matching using regular expressions
QSet	Template class that provides a hash-table-based set
QStack	Template class that provides a stack
QString	Unicode character string
QStringList	List of strings
QVector	Template class that provides a dynamic array