class QPoint¶

The QPoint class defines a point in the plane using integer 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 toPointF()
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 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)
p.rx() += 1

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

__init__()¶

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

See also

isNull()

__init__(xpos, ypos)

Parameters:

xpos – int
ypos – int

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

See also

setX() setY()

__reduce__()¶

Return type:: str

__repr__()¶

Return type:: str

static dotProduct(p1, p2)¶

Parameters:

p1 – QPoint
p2 – QPoint

Return type:

int

Warning

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

p = QPoint( 3, 7)
q = QPoint(-1, 4)
dotProduct = QPoint.dotProduct(p, q) # dotProduct becomes 25()

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, otherwise returns false.

manhattanLength()¶

Return type:: int

Warning

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

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:

oldPosition = QPoint()
MyWidget::mouseMoveEvent(QMouseEvent event)

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

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

TrueLength = std::sqrt(std::pow(x(), 2) + std::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.

__ne__(rhs)¶

Parameters:: rhs – QPoint
Return type:: bool

Returns true if lhs and rhs are not equal; otherwise returns false.

__ne__(rhs)

Parameters:: rhs – QPointF
Return type:: bool

__mul__(matrix)¶

Parameters:: matrix – QMatrix4x4
Return type:: QPoint

Note

This function is deprecated.

__mul__(matrix)

Parameters:: matrix – QMatrix4x4
Return type:: QPoint

__mul__(m)

Parameters:: m – QTransform
Return type:: QPoint

__mul__(factor)

Parameters:: factor – float
Return type:: QPoint

This is an overloaded function.