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QPoint

Inheritance diagram of QPoint

Synopsis

Functions

Detailed Description

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

A point is specified by a x coordinate and an y coordinate which can be accessed using the PySide.QtCore.QPoint.x() and PySide.QtCore.QPoint.y() functions. The PySide.QtCore.QPoint.isNull() function returns true if both x and y are set to 0. The coordinates can be set (or altered) using the PySide.QtCore.QPoint.setX() and PySide.QtCore.QPoint.setY() functions, or alternatively the PySide.QtCore.QPoint.rx() and PySide.QtCore.QPoint.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 PySide.QtCore.QPoint object can also be used as a vector: Addition and subtraction are defined as for vectors (each component is added separately). A PySide.QtCore.QPoint object can also be divided or multiplied by an int or a qreal .

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

class PySide.QtCore.QPoint
class PySide.QtCore.QPoint(QPoint)
class PySide.QtCore.QPoint(xpos, ypos)
Parameters:

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

Constructs a point with the given coordinates (x , y ).

PySide.QtCore.QPoint.__reduce__()
Return type:PyObject
PySide.QtCore.QPoint.__repr__()
Return type:PyObject
PySide.QtCore.QPoint.isNull()
Return type:PySide.QtCore.bool

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

PySide.QtCore.QPoint.manhattanLength()
Return type:PySide.QtCore.int

Returns the sum of the absolute values of PySide.QtCore.QPoint.x() and PySide.QtCore.QPoint.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.

PySide.QtCore.QPoint.__ne__(p2)
Parameters:p2PySide.QtCore.QPoint
Return type:PySide.QtCore.bool
PySide.QtCore.QPoint.__mul__(c)
Parameters:cPySide.QtCore.qreal
Return type:PySide.QtCore.QPoint
PySide.QtCore.QPoint.__mul__(c)
Parameters:cPySide.QtCore.qreal
Return type:PySide.QtCore.QPoint
PySide.QtCore.QPoint.__mul__(m)
Parameters:mPySide.QtGui.QTransform
Return type:PySide.QtCore.QPoint
PySide.QtCore.QPoint.__mul__(matrix)
Parameters:matrixPySide.QtGui.QMatrix4x4
Return type:PySide.QtCore.QPoint
PySide.QtCore.QPoint.__mul__(m)
Parameters:mPySide.QtGui.QMatrix
Return type:PySide.QtCore.QPoint
PySide.QtCore.QPoint.__mul__(matrix)
Parameters:matrixPySide.QtGui.QMatrix4x4
Return type:PySide.QtCore.QPoint
PySide.QtCore.QPoint.__imul__(c)
Parameters:cPySide.QtCore.qreal
Return type:PySide.QtCore.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 PySide.QtCore.QPointF for floating point accuracy.

See also

PySide.QtCore.QPoint.operator/=()

PySide.QtCore.QPoint.__add__(p2)
Parameters:p2PySide.QtCore.QPoint
Return type:PySide.QtCore.QPoint
PySide.QtCore.QPoint.__iadd__(p)
Parameters:pPySide.QtCore.QPoint
Return type:PySide.QtCore.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

PySide.QtCore.QPoint.operator-=()

PySide.QtCore.QPoint.__sub__()
Return type:PySide.QtCore.QPoint
PySide.QtCore.QPoint.__sub__(p2)
Parameters:p2PySide.QtCore.QPoint
Return type:PySide.QtCore.QPoint
PySide.QtCore.QPoint.__isub__(p)
Parameters:pPySide.QtCore.QPoint
Return type:PySide.QtCore.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

PySide.QtCore.QPoint.operator+=()

PySide.QtCore.QPoint.__div__(c)
Parameters:cPySide.QtCore.qreal
Return type:PySide.QtCore.QPoint
PySide.QtCore.QPoint.__idiv__(c)
Parameters:cPySide.QtCore.qreal
Return type:PySide.QtCore.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 PySide.QtCore.QPointF for floating point accuracy.

See also

PySide.QtCore.QPoint.operator*=()

PySide.QtCore.QPoint.__eq__(p2)
Parameters:p2PySide.QtCore.QPoint
Return type:PySide.QtCore.bool
PySide.QtCore.QPoint.setX(x)
Parameters:xPySide.QtCore.int

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

PySide.QtCore.QPoint.setY(y)
Parameters:yPySide.QtCore.int

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

PySide.QtCore.QPoint.toTuple()
Return type:PyObject
PySide.QtCore.QPoint.x()
Return type:PySide.QtCore.int

Returns the x coordinate of this point.

See also

PySide.QtCore.QPoint.setX() PySide.QtCore.QPoint.rx()

PySide.QtCore.QPoint.y()
Return type:PySide.QtCore.int

Returns the y coordinate of this point.

See also

PySide.QtCore.QPoint.setY() PySide.QtCore.QPoint.ry()