class QPointF#

The QPointF class defines a point in the plane using floating point precision. More…

Synopsis#

Methods#

def __init__()
def __reduce__()
def __repr__()
def isNull()
def manhattanLength()
def __ne__()
def __mul__()
def __imul__()
def __add__()
def __iadd__()
def __sub__()
def __isub__()
def __div__()
def operator/=()
def __eq__()
def setX()
def setY()
def toPoint()
def toTuple()
def transposed()
def x()
def y()

Static functions#

def dotProduct()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description#

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

A point is specified by a x coordinate and an y coordinate which can be accessed using the x() and y() functions. The coordinates of the point are specified using finite floating point numbers for accuracy. The isNull() function returns true if both x and y are set to 0.0. The coordinates can be set (or altered) using the setX() and setY() functions, or alternatively the rx() and ry() functions which return references to the coordinates (allowing direct manipulation).

Given a point p, the following statements are all equivalent:

p = QPointF()
p.setX(p.x() + 1.0)
p += QPointF(1.0, 0.0)
p.rx() = p.rx() + 1

A QPointF object can also be used as a vector: Addition and subtraction are defined as for vectors (each component is added separately). A QPointF object can also be divided or multiplied by an int or a qreal.

In addition, the QPointF class provides a constructor converting a QPoint object into a QPointF object, and a corresponding toPoint() function which returns a QPoint copy of this point. Finally, QPointF objects can be streamed as well as compared.

See also

QPoint QPolygonF

__init__(p)#

Parameters:: p – QPoint

Constructs a copy of the given point.

See also

toPoint() toPointF()

__init__(xpos, ypos)

Parameters:

xpos – float
ypos – float

Constructs a point with the given coordinates (xpos, ypos).

See also

setX() setY()

__init__()

Constructs a null point, i.e. with coordinates (0.0, 0.0)

See also

isNull()

__reduce__()#

Return type:: object

__repr__()#

Return type:: object

static dotProduct(p1, p2)#

Parameters:

p1 – QPointF
p2 – QPointF

Return type:

float

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

p = QPointF( 3.1, 7.1)
q = QPointF(-1.0, 4.1)
dotProduct = QPointF.dotProduct(p, q) # dotProduct becomes 26.01()

Returns the dot product of p1 and p2.

isNull()#

Return type:: bool

Returns true if both the x and y coordinates are set to 0.0 (ignoring the sign); otherwise returns false.

manhattanLength()#

Return type:: float

Returns the sum of the absolute values of x() and y() , traditionally known as the “Manhattan length” of the vector from the origin to the point.

See also

manhattanLength()

__ne__(p2)#

Parameters:: p2 – QPointF
Return type:: bool

Returns true if p1 is sufficiently different from p2; otherwise returns false.

Warning

This function does not check for strict inequality; instead, it uses a fuzzy comparison to compare the points’ coordinates.

See also

qFuzzyCompare

__mul__(matrix)#

Parameters:: matrix – QMatrix4x4
Return type:: QPointF

Note

This function is deprecated.

__mul__(matrix)

Parameters:: matrix – QMatrix4x4
Return type:: QPointF

__mul__(m)

Parameters:: m – QTransform
Return type:: QPointF

__mul__(c)

Parameters:: c – float
Return type:: QPointF

This is an overloaded function.

Returns a copy of the given point, multiplied by the given finite factor.

__mul__(c)

Parameters:: c – float
Return type:: QPointF

Returns a copy of the given point, multiplied by the given finite factor.

See also

operator*=()

__imul__(c)#

Parameters:: c – float
Return type:: QPointF

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

Multiplies this point’s coordinates by the given finite factor, and returns a reference to this point. For example:

p = QPointF(-1.1, 4.1)
 = 2.5 # p becomes (-2.75, 10.25)

See also

operator/=()

__add__()#

Return type:: QPointF

Returns point unmodified.

__add__(p2)

Parameters:: p2 – QPointF
Return type:: QPointF

Returns a QPointF object that is the sum of the given points, p1 and p2; each component is added separately.

See also

operator+=()

__iadd__(p)#

Parameters:: p – QPointF
Return type:: QPointF

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

Adds the given point to this point and returns a reference to this point. For example:

p = QPointF( 3.1, 7.1)
q = QPointF(-1.0, 4.1)
p += q # p becomes (2.1, 11.2)

See also

operator-=()

__sub__()#

Return type:: QPointF

This is an overloaded function.

Returns a QPointF object that is formed by changing the sign of each component of the given point.

Equivalent to QPointF(0,0) - point.

__sub__(p2)

Parameters:: p2 – QPointF
Return type:: QPointF

Returns a QPointF object that is formed by subtracting p2 from p1; each component is subtracted separately.

See also

operator-=()

__isub__(p)#

Parameters:: p – QPointF
Return type:: QPointF

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

Subtracts the given point from this point and returns a reference to this point. For example:

p = QPointF( 3.1, 7.1)
q = QPointF(-1.0, 4.1)
p -= q # p becomes (4.1, 3.0)

See also

operator+=()

__div__(divisor)#

Parameters:: divisor – float
Return type:: QPointF

Returns the QPointF object formed by dividing each component of the given point by the given divisor.

The divisor must not be zero or NaN.

See also

operator/=()

operator/=(c)

Parameters:: c – float
Return type:: QPointF

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

Divides both x and y by the given divisor, and returns a reference to this point. For example:

p = QPointF(-2.75, 10.25)
p /= 2.5 # p becomes (-1.1, 4.1)

The divisor must not be zero or NaN.

See also

operator*=()

__eq__(p2)#

Parameters:: p2 – QPointF
Return type:: bool

Returns true if p1 is approximately equal to p2; otherwise returns false.

Warning

This function does not check for strict equality; instead, it uses a fuzzy comparison to compare the points’ coordinates.

See also

qFuzzyCompare

setX(x)#

Parameters:: x – float

Sets the x coordinate of this point to the given finite x coordinate.

See also

x() setY()

setY(y)#

Parameters:: y – float

Sets the y coordinate of this point to the given finite y coordinate.

See also

y() setX()

toPoint()#

Return type:: QPoint

Rounds the coordinates of this point to the nearest integer, and returns a QPoint object with the rounded coordinates.

See also

QPointF() toPointF()

toTuple()#

Return type:: object

transposed()#

Return type:: QPointF

Returns a point with x and y coordinates exchanged:

QPointF{1.0, 2.0}.transposed() // {2.0, 1.0}
See also

x() y() setX() setY()

x()#

Return type:: float

Returns the x coordinate of this point.

See also

setX() rx()

y()#

Return type:: float

Returns the y coordinate of this point.

See also

setY() ry()