QPolygonF¶

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

Synopsis¶

Functions¶

def __add__ (l)
def __eq__ (v)
def __iadd__ (t)
def __iadd__ (t)
def __lshift__ (t)
def __mul__ (, m)
def __mul__ (, m)
def __ne__ (v)
def append (l)
def append (t)
def append (t)
def at (i)
def back ()
def boundingRect ()
def capacity ()
def clear ()
def constData ()
def constFirst ()
def constLast ()
def contains (t)
def containsPoint (pt, fillRule)
def count ()
def count (t)
def data ()
def empty ()
def endsWith (t)
def fill (t[, size=-1])
def first ()
def front ()
def indexOf (t[, from=0])
def insert (i, n, t)
def insert (i, t)
def insert (i, t)
def intersected (r)
def intersects (r)
def isClosed ()
def isEmpty ()
def isSharedWith (other)
def last ()
def lastIndexOf (t[, from=-1])
def length ()
def mid (pos[, len=-1])
def move (from, to)
def operator[] (i)
def pop_back ()
def pop_front ()
def prepend (t)
def prepend (t)
def push_back (t)
def push_back (t)
def push_front (t)
def push_front (t)
def remove (i)
def remove (i, n)
def removeAll (t)
def removeAt (i)
def removeFirst ()
def removeLast ()
def removeOne (t)
def replace (i, t)
def reserve (size)
def resize (size)
def setSharable (sharable)
def shrink_to_fit ()
def size ()
def squeeze ()
def startsWith (t)
def subtracted (r)
def swap (other)
def takeAt (i)
def takeFirst ()
def takeLast ()
def toList ()
def toPolygon ()
def translate (dx, dy)
def translate (offset)
def translated (dx, dy)
def translated (offset)
def united (r)
def value (i)
def value (i, defaultValue)

Static functions¶

def fromList (list)

Detailed Description¶

A QPolygonF is a QVector < QPointF >. The easiest way to add points to a QPolygonF is to use its streaming operator, as illustrated below:
polygon = QPolygonF()
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 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

class QPolygonF¶

QPolygonF(v)

QPolygonF(a)

QPolygonF(a)

QPolygonF(r)

QPolygonF(v)

QPolygonF(size)

param size

int

param a

QPolygon

param r

QRectF

param v

QVector

Constructs a polygon with no points.

See also

isEmpty()

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

See also

isEmpty()

PySide2.QtGui.QPolygonF.append(t)¶

Parameters: t – QPointF

PySide2.QtGui.QPolygonF.append(t)

Parameters: t – QPointF

PySide2.QtGui.QPolygonF.append(l)

Parameters: l –

PySide2.QtGui.QPolygonF.at(i)¶

Parameters: i – int
Return type: QPointF

PySide2.QtGui.QPolygonF.back()¶

Return type: QPointF

PySide2.QtGui.QPolygonF.boundingRect()¶

Return type: QRectF

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

See also

isEmpty()

PySide2.QtGui.QPolygonF.capacity()¶

Return type: int

PySide2.QtGui.QPolygonF.clear()¶

PySide2.QtGui.QPolygonF.constData()¶

Return type: QPointF

PySide2.QtGui.QPolygonF.constFirst()¶

Return type: QPointF

PySide2.QtGui.QPolygonF.constLast()¶

Return type: QPointF

PySide2.QtGui.QPolygonF.contains(t)¶

Parameters: t – QPointF
Return type: bool

PySide2.QtGui.QPolygonF.containsPoint(pt, fillRule)¶

Parameters

pt – QPointF
fillRule – FillRule

Return type

bool

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

PySide2.QtGui.QPolygonF.count()¶

Return type: int

PySide2.QtGui.QPolygonF.count(t)

Parameters: t – QPointF
Return type: int

PySide2.QtGui.QPolygonF.data()¶

Return type: QPointF

PySide2.QtGui.QPolygonF.empty()¶

Return type: bool

PySide2.QtGui.QPolygonF.endsWith(t)¶

Parameters: t – QPointF
Return type: bool

PySide2.QtGui.QPolygonF.fill(t[, size=-1])¶

Parameters

t – QPointF
size – int

Return type

PySide2.QtGui.QPolygonF.first()¶

Return type: QPointF

static PySide2.QtGui.QPolygonF.fromList(list)¶

Parameters: list –
Return type

PySide2.QtGui.QPolygonF.front()¶

Return type: QPointF

PySide2.QtGui.QPolygonF.indexOf(t[, from=0])¶

Parameters

t – QPointF
from – int

Return type

int

PySide2.QtGui.QPolygonF.insert(i, t)¶

Parameters

i – int
t – QPointF

PySide2.QtGui.QPolygonF.insert(i, t)

Parameters

i – int
t – QPointF

PySide2.QtGui.QPolygonF.insert(i, n, t)

Parameters

i – int
n – int
t – QPointF

PySide2.QtGui.QPolygonF.intersected(r)¶

Parameters: r – QPolygonF
Return type: QPolygonF

Returns a polygon which is the intersection of this polygon and r .

Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.

See also

intersects()

PySide2.QtGui.QPolygonF.intersects(r)¶

Parameters: r – QPolygonF
Return type: bool

Returns true if the current polygon intersects at any point the given polygon p . Also returns true if the current polygon contains or is contained by any part of p .

Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.

See also

intersected()

PySide2.QtGui.QPolygonF.isClosed()¶

Return type: bool

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

first() last()

PySide2.QtGui.QPolygonF.isEmpty()¶

Return type: bool

PySide2.QtGui.QPolygonF.isSharedWith(other)¶

Parameters: other –
Return type: bool

PySide2.QtGui.QPolygonF.last()¶

Return type: QPointF

PySide2.QtGui.QPolygonF.lastIndexOf(t[, from=-1])¶

Parameters

t – QPointF
from – int

Return type

int

PySide2.QtGui.QPolygonF.length()¶

Return type: int

PySide2.QtGui.QPolygonF.mid(pos[, len=-1])¶

Parameters

pos – int
len – int

Return type

PySide2.QtGui.QPolygonF.move(from, to)¶

Parameters

from – int
to – int

PySide2.QtGui.QPolygonF.__ne__(v)¶

Parameters: v –
Return type: bool

PySide2.QtGui.QPolygonF.__mul__(m)¶

Parameters: m – QTransform
Return type: QPolygonF

PySide2.QtGui.QPolygonF.__mul__(m)

Parameters: m – QMatrix
Return type: QPolygonF

PySide2.QtGui.QPolygonF.__add__(l)¶

Parameters: l –
Return type

PySide2.QtGui.QPolygonF.__iadd__(t)¶

Parameters: t – QPointF
Return type

PySide2.QtGui.QPolygonF.__iadd__(t)

Parameters: t – QPointF
Return type

PySide2.QtGui.QPolygonF.__lshift__(t)¶

Parameters: t – QPointF
Return type

PySide2.QtGui.QPolygonF.__eq__(v)¶

Parameters: v –
Return type: bool

PySide2.QtGui.QPolygonF.operator[](i)

Parameters: i – int
Return type: QPointF

PySide2.QtGui.QPolygonF.pop_back()¶

PySide2.QtGui.QPolygonF.pop_front()¶

PySide2.QtGui.QPolygonF.prepend(t)¶

Parameters: t – QPointF

PySide2.QtGui.QPolygonF.prepend(t)

Parameters: t – QPointF

PySide2.QtGui.QPolygonF.push_back(t)¶

Parameters: t – QPointF

PySide2.QtGui.QPolygonF.push_back(t)

Parameters: t – QPointF

PySide2.QtGui.QPolygonF.push_front(t)¶

Parameters: t – QPointF

PySide2.QtGui.QPolygonF.push_front(t)

Parameters: t – QPointF

PySide2.QtGui.QPolygonF.remove(i)¶

Parameters: i – int

PySide2.QtGui.QPolygonF.remove(i, n)

Parameters

i – int
n – int

PySide2.QtGui.QPolygonF.removeAll(t)¶

Parameters: t – QPointF
Return type: int

PySide2.QtGui.QPolygonF.removeAt(i)¶

Parameters: i – int

PySide2.QtGui.QPolygonF.removeFirst()¶

PySide2.QtGui.QPolygonF.removeLast()¶

PySide2.QtGui.QPolygonF.removeOne(t)¶

Parameters: t – QPointF
Return type: bool

PySide2.QtGui.QPolygonF.replace(i, t)¶

Parameters

i – int
t – QPointF

PySide2.QtGui.QPolygonF.reserve(size)¶

Parameters: size – int

PySide2.QtGui.QPolygonF.resize(size)¶

Parameters: size – int

PySide2.QtGui.QPolygonF.setSharable(sharable)¶

Parameters: sharable – bool

PySide2.QtGui.QPolygonF.shrink_to_fit()¶

PySide2.QtGui.QPolygonF.size()¶

Return type: int

PySide2.QtGui.QPolygonF.squeeze()¶

PySide2.QtGui.QPolygonF.startsWith(t)¶

Parameters: t – QPointF
Return type: bool

PySide2.QtGui.QPolygonF.subtracted(r)¶

Parameters: r – QPolygonF
Return type: QPolygonF

Returns a polygon which is r subtracted from this polygon.

Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.

PySide2.QtGui.QPolygonF.swap(other)¶

Parameters: other – QPolygonF

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

PySide2.QtGui.QPolygonF.takeAt(i)¶

Parameters: i – int
Return type: QPointF

PySide2.QtGui.QPolygonF.takeFirst()¶

Return type: QPointF

PySide2.QtGui.QPolygonF.takeLast()¶

Return type: QPointF

PySide2.QtGui.QPolygonF.toList()¶

Return type

PySide2.QtGui.QPolygonF.toPolygon()¶

Return type: QPolygon

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

See also

toPoint()

PySide2.QtGui.QPolygonF.translate(offset)¶

Parameters: offset – QPointF

Translate all points in the polygon by the given offset .

See also

translated()

PySide2.QtGui.QPolygonF.translate(dx, dy)

Parameters

dx – qreal
dy – qreal

This is an overloaded function.

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

See also

translated()

PySide2.QtGui.QPolygonF.translated(offset)¶

Parameters: offset – QPointF
Return type: QPolygonF

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

See also

translate()

PySide2.QtGui.QPolygonF.translated(dx, dy)

Parameters

dx – qreal
dy – qreal

Return type

QPolygonF

This is an overloaded function.

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

See also

translate()

PySide2.QtGui.QPolygonF.united(r)¶

Parameters: r – QPolygonF
Return type: QPolygonF

Returns a polygon which is the union of this polygon and r .

Set operations on polygons will treat the polygons as areas. Non-closed polygons will be treated as implicitly closed.

See also

intersected() subtracted()

PySide2.QtGui.QPolygonF.value(i)¶

Parameters: i – int
Return type: QPointF

PySide2.QtGui.QPolygonF.value(i, defaultValue)

Parameters

i – int
defaultValue – QPointF

Return type

QPointF

Qt Documentation

Table of Contents

QPolygonF¶

Synopsis¶

Functions¶

Static functions¶

Detailed Description¶