The QPolygonF class provides a vector of points using floating point precision. More...

Inheritance diagram for QPolygonF:

Public Methods
	QPolygonF ()

	QPolygonF (const QPolygon &polygon)

	QPolygonF (const QPolygonF &other)

	QPolygonF (const QRectF &rect)

	QPolygonF (const QVector< QPointF > &points)

	QPolygonF (int size)

	QPolygonF (QPolygonF &&other)

	QPolygonF (QVector< QPointF > &&points)

	~QPolygonF ()

QRectF	boundingRect () const

bool	containsPoint (const QPointF &point, Qt::FillRule fillRule) const

QPolygonF	intersected (const QPolygonF &other) const

bool	intersects (const QPolygonF &other) const

bool	isClosed () const

	operator QVariant () const

QPolygonF &	operator= (const QPolygonF &other)

QPolygonF &	operator= (QPolygonF &&other)

QPolygonF	subtracted (const QPolygonF &other) const

void	swap (QPolygonF &other)

QPolygon	toPolygon () const

void	translate (const QPointF &offset)

void	translate (qreal dx, qreal dy)

QPolygonF	translated (const QPointF &offset) const

QPolygonF	translated (qreal dx, qreal dy) const

QPolygonF	united (const QPolygonF &other) const

Public Methods inherited from QVector< QPointF >
	QVector () = default

	QVector (const QVector< QPointF > &other) = default

	QVector (Input_Iterator first, Input_Iterator last)

	QVector (QVector< QPointF > &&other) = default

	QVector (size_type size)

	QVector (size_type size, const QPointF &value)

	QVector (std::initializer_list< QPointF > args)

	~QVector () = default

void	append (const QPointF &value)

void	append (const QVector< QPointF > &other)

void	append (Iter begin, Iter end)

void	append (QPointF &&value)

const_reference	at (size_type pos) const

reference	back ()

const_reference	back () const

iterator	begin ()

const_iterator	begin () const

size_type	capacity () const

const_iterator	cbegin () const

const_iterator	cend () const

void	clear ()

const_iterator	constBegin () const

const QPointF *	constData () const

const_iterator	constEnd () const

const_reference	constFirst () const

const_reference	constLast () const

bool	contains (const QPointF &value) const

size_type	count () const

size_type	count (const QPointF &value) const

const_reverse_iterator	crbegin () const

const_reverse_iterator	crend () const

QPointF *	data ()

const QPointF *	data () const

bool	empty () const

iterator	end ()

const_iterator	end () const

bool	endsWith (const QPointF &value) const

iterator	erase (const_iterator begin, const_iterator end)

iterator	erase (const_iterator pos)

QVector< QPointF > &	fill (const QPointF &value, size_type size=-1)

reference	first ()

const_reference	first () const

reference	front ()

const_reference	front () const

size_type	indexOf (const QPointF &value, size_type from=0) const

iterator	insert (iterator before, const QPointF &value)

iterator	insert (iterator before, size_type count, const QPointF &value)

iterator	insert (iterator pos, Iter begin, Iter end)

void	insert (size_type pos, const QPointF &value)

void	insert (size_type pos, size_type count, const QPointF &value)

bool	isEmpty () const

reference	last ()

const_reference	last () const

size_type	lastIndexOf (const QPointF &value, size_type from=-1) const

size_type	length () const

QVector< QPointF >	mid (size_type pos, size_type length=-1) const

void	move (size_type from, size_type to)

bool	operator!= (const QVector< QPointF > &other) const

QVector< QPointF >	operator+ (const QVector< QPointF > &other) const

QVector< QPointF > &	operator+= (const QPointF &value)

QVector< QPointF > &	operator+= (const QVector< QPointF > &other)

QVector< QPointF > &	operator<< (const QPointF &value)

QVector< QPointF > &	operator<< (const QVector< QPointF > &other)

QVector< QPointF > &	operator= (const QVector< QPointF > &other) = default

QVector< QPointF > &	operator= (QVector< QPointF > &&other) = default

bool	operator== (const QVector< QPointF > &other) const

reference	operator[] (size_type i)

const_reference	operator[] (size_type i) const

void	pop_back ()

void	pop_front ()

void	prepend (const QPointF &value)

void	push_back (const QPointF &value)

void	push_back (QPointF &&value)

void	push_front (const QPointF &value)

void	push_front (QPointF &&value)

reverse_iterator	rbegin ()

const_reverse_iterator	rbegin () const

void	remove (size_type pos)

void	remove (size_type pos, size_type count)

size_type	removeAll (const QPointF &value)

void	removeAt (size_type pos)

void	removeFirst ()

void	removeLast ()

bool	removeOne (const QPointF &value)

reverse_iterator	rend ()

const_reverse_iterator	rend () const

void	replace (size_type i, const QPointF &value)

void	reserve (size_type size)

void	resize (size_type size)

size_type	size () const

void	squeeze ()

bool	startsWith (const QPointF &value) const

void	swap (QVector< QPointF > &other)

QPointF	takeAt (size_type pos)

QPointF	takeFirst ()

QPointF	takeLast ()

QList< QPointF >	toList () const

std::vector< QPointF >	toStdVector () const

QPointF	value (size_type pos) const

QPointF	value (size_type pos, const QPointF &defaultValue) const

Related Functions
These are not member functions
QDataStream &	operator<< (QDataStream &stream, const QPolygonF &polygon)

QDataStream &	operator>> (QDataStream &stream, QPolygonF &polygon)

Related Functions inherited from QVector< QPointF >
bool	operator< (const QVector< QPointF > &lhs, const QVector< QPointF > &rhs)

QDataStream &	operator<< (QDataStream &stream, const QVector< QPointF > &vector)

bool	operator<= (const QVector< QPointF > &lhs, const QVector< QPointF > &rhs)

bool	operator> (const QVector< QPointF > &lhs, const QVector< QPointF > &rhs)

bool	operator>= (const QVector< QPointF > &lhs, const QVector< QPointF > &rhs)

QDataStream &	operator>> (QDataStream &stream, QVector< QPointF > &vector)

Additional Inherited Members
Public Typedefs inherited from QVector< QPointF >
using	allocator_type = typename std::vector< QPointF >::allocator_type

using	const_iterator = typename std::vector< QPointF >::const_iterator

using	const_pointer = typename std::vector< QPointF >::const_pointer

using	const_reference = typename std::vector< QPointF >::const_reference

using	const_reverse_iterator = typename std::vector< QPointF >::const_reverse_iterator

using	difference_type = typename std::vector< QPointF >::difference_type

using	iterator = typename std::vector< QPointF >::iterator

using	Java_Iterator = QVectorIterator< QPointF >

using	Java_MutableIterator = QMutableVectorIterator< QPointF >

using	pointer = typename std::vector< QPointF >::pointer

using	reference = typename std::vector< QPointF >::reference

using	reverse_iterator = typename std::vector< QPointF >::reverse_iterator

using	size_type = typename std::vector< QPointF >::difference_type

using	value_type = typename std::vector< QPointF >::value_type

Static Public Methods inherited from QVector< QPointF >
static QVector< QPointF >	fromList (const QList< QPointF > &list)

static QVector< QPointF >	fromStdVector (const std::vector< QPointF > &vector)

Detailed Description

The QPolygonF class provides a vector of points using floating point precision.

A QPolygonF is a QVector<QPointF>. The easiest way to add points to a QPolygonF is to use the streaming operator, as illustrated below.

QPolygonF polygon;

polygon << QPointF(10.4, 20.5) << QPointF(20.2, 30.2);

In addition to the functions provided by QVector, QPolygonF provides the boundingRect() and translate() functions for geometry operations. Use the QMatrix::map() function for more general transformations of QPolygonFs.

QPolygonF also provides the isClosed() function to determine whether a polygon's start and end points are the same, and the toPolygon() function returning an integer precision copy of this polygon.

The QPolygonF class is implicitly shared.

See also: QVector, QPolygon, QLineF

Constructor & Destructor Documentation

QPolygonF::QPolygonF ( )

inline

Constructs a polygon with no points.

See also: QVector::isEmpty()

QPolygonF::QPolygonF ( int size )

inlineexplicit

Constructs a polygon of the given size. Creates an empty polygon if size == 0.

See also: QVector::isEmpty()

QPolygonF::QPolygonF ( const QPolygonF & other )

inline

Constructs a copy of other.

QPolygonF::QPolygonF ( QPolygonF && other )

inline

Move constructs a copy of other.

QPolygonF::QPolygonF ( const QVector< QPointF > & points )

inline

Constructs a polygon containing the specified points.

QPolygonF::QPolygonF ( QVector< QPointF > && points )

inline

Move constructs a polygon containing the specified points.

QPolygonF::QPolygonF ( const QRectF & rect )

Constructs a closed polygon from the specified rect. The polygon contains the four vertices of the rectangle in clockwise order starting and ending with the top-left vertex.

See also: isClosed()

QPolygonF::QPolygonF ( const QPolygon & polygon )

Constructs a float based polygon from the specified integer based polygon.

See also: toPolygon()

QPolygonF::~QPolygonF ( )

inline

Destroys the polygon.

Method Documentation

QRectF QPolygonF::boundingRect ( ) const

Returns the bounding rectangle of the polygon, or QRectF(0,0,0,0) if the polygon is empty.

See also: QVector::isEmpty()

bool QPolygonF::containsPoint	(	const QPointF &	point,
		Qt::FillRule	fillRule
	)		const

Returns true if the given point is inside the polygon according to the specified fillRule, otherwise returns false.

QPolygonF QPolygonF::intersected ( const QPolygonF & other ) const

Returns a polygon which is the intersection of this polygon and other. Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.

bool QPolygonF::intersects ( const QPolygonF & other ) const

Returns true if the current polygon intersects at any point the given other. Also returns true if the current polygon contains or is contained by any part of rectangle. Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.

bool QPolygonF::isClosed ( ) const

inline

Returns true if the polygon is closed, otherwise returns false. A polygon is said to be closed if its start point and end point are equal.

See also: QVector::first(), QVector::last()

QPolygonF::operator QVariant ( ) const

Returns the polygon as a QVariant.

QPolygonF & QPolygonF::operator= ( const QPolygonF & other )

inline

Copy assigns from other and returns a reference to this object.

QPolygonF & QPolygonF::operator= ( QPolygonF && other )

inline

Move assigns from other and returns a reference to this object.

QPolygonF QPolygonF::subtracted ( const QPolygonF & other ) const

Returns a polygon which is other subtracted from this polygon. Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.

void QPolygonF::swap ( QPolygonF & other )

inline

Swaps polygon other with this polygon. This operation is very fast and never fails.

QPolygon QPolygonF::toPolygon ( ) const

Creates and returns a QPolygon by converting each QPointF to a QPoint.

See also: QPointF::toPoint()

void QPolygonF::translate ( const QPointF & offset )

Translate all points in the polygon by the given offset.

See also: translated()

void QPolygonF::translate	(	qreal	dx,
		qreal	dy
	)

inline

Translates all points in the polygon by (dx, dy).

See also: translated()

QPolygonF QPolygonF::translated ( const QPointF & offset ) const

Returns a copy of the polygon that is translated by the given offset.

See also: translate()

QPolygonF QPolygonF::translated	(	qreal	dx,
		qreal	dy
	)		const

inline

Returns a copy of the polygon that is translated by (dx, dy).

See also: translate()

QPolygonF QPolygonF::united ( const QPolygonF & other ) const

Returns a polygon which is the union of this polygon and other. Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.

See also: intersected(), subtracted()

Friends And Related Function Documentation

QDataStream & operator<<	(	QDataStream &	stream,
		const QPolygonF &	polygon
	)

Refer to Serializing Data Types for additional information.

QDataStream & operator>>	(	QDataStream &	stream,
		QPolygonF &	polygon
	)

Refer to Serializing Data Types for additional information.

Public Methods

Related Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Method Documentation

Friends And Related Function Documentation