QPointF¶

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

Synopsis¶

Functions¶

def __add__ ()
def __add__ (, p2)
def __div__ (, divisor)
def __eq__ (, p2)
def __iadd__ (p)
def __idiv__ (c)
def __imul__ (c)
def __isub__ (p)
def __mul__ (, c)
def __mul__ (, m)
def __mul__ (, m)
def __mul__ (, matrix)
def __mul__ (c)
def __mul__ (matrix)
def __ne__ (, p2)
def __reduce__ ()
def __repr__ ()
def __sub__ ()
def __sub__ (, p2)
def isNull ()
def manhattanLength ()
def setX (x)
def setY (y)
def toPoint ()
def toTuple ()
def x ()
def y ()

Static functions¶

def dotProduct (p1, p2)

Detailed Description¶

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 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()++;
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

class QPointF¶

QPointF(p)

QPointF(QPointF)

QPointF(xpos, ypos)

param ypos

qreal

param p

QPoint

param xpos

qreal

param QPointF

QPointF

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

See also

isNull()

Constructs a copy of the given point .

See also

toPoint()

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

See also

setX() setY()

PySide2.QtCore.QPointF.__reduce__()¶

Return type: PyObject

PySide2.QtCore.QPointF.__repr__()¶

Return type: PyObject

static PySide2.QtCore.QPointF.dotProduct(p1, p2)¶

Parameters

p1 – QPointF
p2 – QPointF

Return type

qreal

QPointF p( 3.1, 7.1);
QPointF q(-1.0, 4.1);
int lengthSquared = QPointF::dotProduct(p, q);   // lengthSquared becomes 26.01

Returns the dot product of p1 and p2 .

PySide2.QtCore.QPointF.isNull()¶

Return type: bool

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

PySide2.QtCore.QPointF.manhattanLength()¶

Return type: qreal

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()

PySide2.QtCore.QPointF.__ne__(p2)¶

Parameters: p2 – QPointF
Return type: bool

PySide2.QtCore.QPointF.__mul__(m)¶

Parameters: m – QMatrix
Return type: QPointF

PySide2.QtCore.QPointF.__mul__(matrix)

Parameters: matrix – QMatrix4x4
Return type: QPointF

PySide2.QtCore.QPointF.__mul__(matrix)

Parameters: matrix – QMatrix4x4
Return type: QPointF

PySide2.QtCore.QPointF.__mul__(m)

Parameters: m – QTransform
Return type: QPointF

PySide2.QtCore.QPointF.__mul__(c)

Parameters: c – qreal
Return type: QPointF

PySide2.QtCore.QPointF.__mul__(c)

Parameters: c – qreal
Return type: QPointF

PySide2.QtCore.QPointF.__imul__(c)¶

Parameters: c – qreal
Return type: QPointF

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

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

See also

operator/=()

PySide2.QtCore.QPointF.__add__()¶

Return type: QPointF

PySide2.QtCore.QPointF.__add__(p2)

Parameters: p2 – QPointF
Return type: QPointF

Returns point unmodified.

PySide2.QtCore.QPointF.__iadd__(p)¶

Parameters: p – QPointF
Return type: QPointF

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-=()

PySide2.QtCore.QPointF.__sub__()¶

Return type: QPointF

PySide2.QtCore.QPointF.__sub__(p2)

Parameters: p2 – QPointF
Return type: QPointF

This is an overloaded function.

Returns a QPointF object that is formed by changing the sign of both components of the given point .

Equivalent to QPointF(0,0) - point .

PySide2.QtCore.QPointF.__isub__(p)¶

Parameters: p – QPointF
Return type: QPointF

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+=()

PySide2.QtCore.QPointF.__div__(divisor)¶

Parameters: divisor – qreal
Return type: QPointF

PySide2.QtCore.QPointF.__idiv__(c)¶

Parameters: c – qreal
Return type: QPointF

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)

See also

operator*=()

PySide2.QtCore.QPointF.__eq__(p2)¶

Parameters: p2 – QPointF
Return type: bool

PySide2.QtCore.QPointF.setX(x)¶

Parameters: x – qreal

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

See also

x() setY()

PySide2.QtCore.QPointF.setY(y)¶

Parameters: y – qreal

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

See also

y() setX()

PySide2.QtCore.QPointF.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()

PySide2.QtCore.QPointF.toTuple()¶

Return type: PyObject

PySide2.QtCore.QPointF.x()¶

Return type: qreal

Returns the x coordinate of this point.

See also

setX() rx()

PySide2.QtCore.QPointF.y()¶

Return type: qreal

Returns the y coordinate of this point.

See also

setY() ry()

Qt Documentation

Table of Contents

QPointF¶

Synopsis¶

Functions¶

Static functions¶

Detailed Description¶