QPolygonF

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

Inheritance diagram of PySide2.QtGui.QPolygonF

Synopsis

Functions

Static functions

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

tQPointF

PySide2.QtGui.QPolygonF.append(t)
Parameters

tQPointF

PySide2.QtGui.QPolygonF.append(l)
Parameters

l

PySide2.QtGui.QPolygonF.at(i)
Parameters

iint

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

tQPointF

Return type

bool

PySide2.QtGui.QPolygonF.containsPoint(pt, fillRule)
Parameters
  • ptQPointF

  • fillRuleFillRule

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

tQPointF

Return type

int

PySide2.QtGui.QPolygonF.data()
Return type

QPointF

PySide2.QtGui.QPolygonF.empty()
Return type

bool

PySide2.QtGui.QPolygonF.endsWith(t)
Parameters

tQPointF

Return type

bool

PySide2.QtGui.QPolygonF.fill(t[, size=-1])
Parameters
  • tQPointF

  • sizeint

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
  • tQPointF

  • fromint

Return type

int

PySide2.QtGui.QPolygonF.insert(i, t)
Parameters
  • iint

  • tQPointF

PySide2.QtGui.QPolygonF.insert(i, t)
Parameters
  • iint

  • tQPointF

PySide2.QtGui.QPolygonF.insert(i, n, t)
Parameters
  • iint

  • nint

  • tQPointF

PySide2.QtGui.QPolygonF.intersected(r)
Parameters

rQPolygonF

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

rQPolygonF

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
  • tQPointF

  • fromint

Return type

int

PySide2.QtGui.QPolygonF.length()
Return type

int

PySide2.QtGui.QPolygonF.mid(pos[, len=-1])
Parameters
  • posint

  • lenint

Return type

PySide2.QtGui.QPolygonF.move(from, to)
Parameters
  • fromint

  • toint

PySide2.QtGui.QPolygonF.__ne__(v)
Parameters

v

Return type

bool

PySide2.QtGui.QPolygonF.__mul__(m)
Parameters

mQMatrix

Return type

QPolygonF

PySide2.QtGui.QPolygonF.__mul__(m)
Parameters

mQTransform

Return type

QPolygonF

PySide2.QtGui.QPolygonF.__add__(l)
Parameters

l

Return type

PySide2.QtGui.QPolygonF.__iadd__(t)
Parameters

tQPointF

Return type

PySide2.QtGui.QPolygonF.__iadd__(t)
Parameters

tQPointF

Return type

PySide2.QtGui.QPolygonF.__lshift__(t)
Parameters

tQPointF

Return type

PySide2.QtGui.QPolygonF.__eq__(v)
Parameters

v

Return type

bool

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

iint

Return type

QPointF

PySide2.QtGui.QPolygonF.pop_back()
PySide2.QtGui.QPolygonF.pop_front()
PySide2.QtGui.QPolygonF.prepend(t)
Parameters

tQPointF

PySide2.QtGui.QPolygonF.prepend(t)
Parameters

tQPointF

PySide2.QtGui.QPolygonF.push_back(t)
Parameters

tQPointF

PySide2.QtGui.QPolygonF.push_back(t)
Parameters

tQPointF

PySide2.QtGui.QPolygonF.push_front(t)
Parameters

tQPointF

PySide2.QtGui.QPolygonF.push_front(t)
Parameters

tQPointF

PySide2.QtGui.QPolygonF.remove(i)
Parameters

iint

PySide2.QtGui.QPolygonF.remove(i, n)
Parameters
  • iint

  • nint

PySide2.QtGui.QPolygonF.removeAll(t)
Parameters

tQPointF

Return type

int

PySide2.QtGui.QPolygonF.removeAt(i)
Parameters

iint

PySide2.QtGui.QPolygonF.removeFirst()
PySide2.QtGui.QPolygonF.removeLast()
PySide2.QtGui.QPolygonF.removeOne(t)
Parameters

tQPointF

Return type

bool

PySide2.QtGui.QPolygonF.replace(i, t)
Parameters
  • iint

  • tQPointF

PySide2.QtGui.QPolygonF.reserve(size)
Parameters

sizeint

PySide2.QtGui.QPolygonF.resize(size)
Parameters

sizeint

PySide2.QtGui.QPolygonF.setSharable(sharable)
Parameters

sharablebool

PySide2.QtGui.QPolygonF.shrink_to_fit()
PySide2.QtGui.QPolygonF.size()
Return type

int

PySide2.QtGui.QPolygonF.squeeze()
PySide2.QtGui.QPolygonF.startsWith(t)
Parameters

tQPointF

Return type

bool

PySide2.QtGui.QPolygonF.subtracted(r)
Parameters

rQPolygonF

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

otherQPolygonF

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

PySide2.QtGui.QPolygonF.takeAt(i)
Parameters

iint

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

offsetQPointF

Translate all points in the polygon by the given offset .

See also

translated()

PySide2.QtGui.QPolygonF.translate(dx, dy)
Parameters
  • dxqreal

  • dyqreal

This is an overloaded function.

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

See also

translated()

PySide2.QtGui.QPolygonF.translated(offset)
Parameters

offsetQPointF

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
  • dxqreal

  • dyqreal

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

rQPolygonF

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.

PySide2.QtGui.QPolygonF.value(i)
Parameters

iint

Return type

QPointF

PySide2.QtGui.QPolygonF.value(i, defaultValue)
Parameters
  • iint

  • defaultValueQPointF

Return type

QPointF