QPoint

The QPoint class defines a point in the plane using integer precision. More

Inheritance diagram of PySide2.QtCore.QPoint

Synopsis

Functions

Static functions

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 isNull() function returns true if both x and y are set to 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 = QPoint()

p.setX(p.x() + 1)
p += QPoint(1, 0)

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

In addition, the QPoint class provides the manhattanLength() function which gives an inexpensive approximation of the length of the QPoint object interpreted as a vector. Finally, QPoint objects can be streamed as well as compared.

See also

QPointF QPolygon

class QPoint

QPoint(QPoint)

QPoint(xpos, ypos)

param QPoint

QPoint

param ypos

int

param xpos

int

Constructs a null point, i.e. with coordinates (0, 0)

See also

isNull()

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

See also

setX() setY()

PySide2.QtCore.QPoint.__reduce__()
Return type

PyObject

PySide2.QtCore.QPoint.__repr__()
Return type

PyObject

static PySide2.QtCore.QPoint.dotProduct(p1, p2)
Parameters
Return type

int

QPoint p( 3, 7);
QPoint q(-1, 4);
int lengthSquared = QPoint::dotProduct(p, q);   // lengthSquared becomes 25

Returns the dot product of p1 and p2 .

PySide2.QtCore.QPoint.isNull()
Return type

bool

Returns true if both the x and y coordinates are set to 0, otherwise returns false .

PySide2.QtCore.QPoint.manhattanLength()
Return type

int

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. For example:

class MyWidget(QWidget):

    self.oldPosition = QPointer()

    # event : QMouseEvent
    def mouseMoveEvent(QMouseEvent event):
        point = event.pos() - self.oldPosition
        if (point.manhattanLength() > 3):
            # the mouse has moved more than 3 pixels since the oldPosition
            pass

This is a useful, and quick to calculate, approximation to the true length:

trueLength = sqrt(pow(x(), 2) + pow(y(), 2))

The tradition of “Manhattan length” arises because such distances apply to travelers who can only travel on a rectangular grid, like the streets of Manhattan.

PySide2.QtCore.QPoint.__ne__(p2)
Parameters

p2QPoint

Return type

bool

PySide2.QtCore.QPoint.__mul__(matrix)
Parameters

matrixQMatrix4x4

Return type

QPoint

PySide2.QtCore.QPoint.__mul__(factor)
Parameters

factorint

Return type

QPoint

PySide2.QtCore.QPoint.__mul__(factor)
Parameters

factorint

Return type

QPoint

PySide2.QtCore.QPoint.__mul__(factor)
Parameters

factorfloat

Return type

QPoint

PySide2.QtCore.QPoint.__mul__(factor)
Parameters

factorfloat

Return type

QPoint

PySide2.QtCore.QPoint.__mul__(factor)
Parameters

factordouble

Return type

QPoint

PySide2.QtCore.QPoint.__mul__(factor)
Parameters

factordouble

Return type

QPoint

PySide2.QtCore.QPoint.__mul__(m)
Parameters

mQTransform

Return type

QPoint

PySide2.QtCore.QPoint.__mul__(matrix)
Parameters

matrixQMatrix4x4

Return type

QPoint

PySide2.QtCore.QPoint.__mul__(m)
Parameters

mQMatrix

Return type

QPoint

PySide2.QtCore.QPoint.__imul__(factor)
Parameters

factordouble

Return type

QPoint

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

p = QPoint(-1, 4)
p *= 2.5  # p becomes (-3, 10)

Note that the result is rounded to the nearest integer as points are held as integers. Use QPointF for floating point accuracy.

See also

operator/=()

PySide2.QtCore.QPoint.__imul__(factor)
Parameters

factorint

Return type

QPoint

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

See also

operator/=()

PySide2.QtCore.QPoint.__imul__(factor)
Parameters

factorfloat

Return type

QPoint

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

Note that the result is rounded to the nearest integer as points are held as integers. Use QPointF for floating point accuracy.

See also

operator/=()

PySide2.QtCore.QPoint.__add__()
Return type

QPoint

PySide2.QtCore.QPoint.__add__(p2)
Parameters

p2QPoint

Return type

QPoint

PySide2.QtCore.QPoint.__iadd__(p)
Parameters

pQPoint

Return type

QPoint

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

p = QPoint( 3, 7)
q = QPoint(-1, 4)
p += q    # p becomes (2, 11)

See also

operator-=()

PySide2.QtCore.QPoint.__sub__()
Return type

QPoint

PySide2.QtCore.QPoint.__sub__(p2)
Parameters

p2QPoint

Return type

QPoint

PySide2.QtCore.QPoint.__isub__(p)
Parameters

pQPoint

Return type

QPoint

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

p = QPoint( 3, 7)
q = QPoint(-1, 4)
p -= q    # p becomes (4, 3)

See also

operator+=()

PySide2.QtCore.QPoint.__div__(c)
Parameters

cqreal

Return type

QPoint

PySide2.QtCore.QPoint.__idiv__(divisor)
Parameters

divisorqreal

Return type

QPoint

This is an overloaded function.

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

p = QPoint(-3, 10)
p /= 2.5  # p becomes (-1, 4)

Note that the result is rounded to the nearest integer as points are held as integers. Use QPointF for floating point accuracy.

See also

operator*=()

PySide2.QtCore.QPoint.__eq__(p2)
Parameters

p2QPoint

Return type

bool

PySide2.QtCore.QPoint.setX(x)
Parameters

xint

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

See also

x() setY()

PySide2.QtCore.QPoint.setY(y)
Parameters

yint

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

See also

y() setX()

PySide2.QtCore.QPoint.toTuple()
Return type

PyObject

PySide2.QtCore.QPoint.x()
Return type

int

Returns the x coordinate of this point.

See also

setX() rx()

PySide2.QtCore.QPoint.y()
Return type

int

Returns the y coordinate of this point.

See also

setY() ry()