CopperSpice API  1.7.4
QPolygonF Class Reference

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

Inheritance diagram for QPolygonF:
QVector< QPointF >

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 i) 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 QPointFconstData () 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
 
QPointFdata ()
 
const QPointFdata () 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 newSize=-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< QPointFmid (size_type pos, size_type length=-1) const
 
void move (size_type from, size_type to)
 
bool operator!= (const QVector< QPointF > &other) const
 
QVector< QPointFoperator+ (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 i)
 
QPointF takeFirst ()
 
QPointF takeLast ()
 
QList< QPointFtoList () const
 
std::vector< QPointFtoStdVector () const
 
QPointF value (size_type i) const
 
QPointF value (size_type i, const QPointF &defaultValue) const
 

Related Functions

These are not member functions

QDataStreamoperator<< (QDataStream &stream, const QPolygonF &polygon)
 
QDataStreamoperator>> (QDataStream &stream, QPolygonF &polygon)
 

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< QPointFfromList (const QList< QPointF > &list)
 
static QVector< QPointFfromStdVector (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.

See also
setPoints()
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 
)
related

Writes the given polygon to the given stream, and returns a reference to the stream.

See also
Refer to Serializing Data Types for additional information
QDataStream & operator>> ( QDataStream stream,
QPolygonF &  polygon 
)
related

Reads a polygon from the given stream into the given polygon, and returns a reference to the stream.

See also
Refer to Serializing Data Types for additional information