QPoint ¶

概要 ¶

函数 ¶

def __add__ (, p2)
def __div__ (, c)
def __eq__ (, p2)
def __iadd__ (p)
def __idiv__ (c)
def __imul__ (c)
def __imul__ (c)
def __imul__ (c)
def __isub__ (p)
def __mul__ (, c)
def __mul__ (, c)
def __mul__ (, c)
def __mul__ (, m)
def __mul__ (, m)
def __mul__ (, matrix)
def __mul__ (c)
def __mul__ (c)
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 toTuple ()
def x ()
def y ()

详细描述 ¶

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 或 qreal .

此外， 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.

另请参阅

PySide.QtCore.QPointF PySide.QtGui.QPolygon

class PySide.QtCore. QPoint ¶

class PySide.QtCore. QPoint ( QPoint )

class PySide.QtCore. QPoint ( xpos , ypos )

参数：	ypos – `PySide.QtCore.int` xpos – `PySide.QtCore.int` QPoint – `PySide.QtCore.QPoint`

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

另请参阅

PySide.QtCore.QPoint.isNull()

构造点采用给定坐标 ( x , y ).

另请参阅

PySide.QtCore.QPoint.setX() PySide.QtCore.QPoint.setY()

PySide.QtCore.QPoint. __reduce__ ( ) ¶

返回类型：	`PyObject`

PySide.QtCore.QPoint. __repr__ ( ) ¶

返回类型：	`PyObject`

PySide.QtCore.QPoint. isNull ( ) ¶

返回类型：	`PySide.QtCore.bool`

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

PySide.QtCore.QPoint. manhattanLength ( ) ¶

返回类型：	`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 ) ¶

参数：	p2 – `PySide.QtCore.QPoint`
返回类型：	`PySide.QtCore.bool`

PySide.QtCore.QPoint. __mul__ ( c ) ¶

参数：	c – `PySide.QtCore.float`
返回类型：	`PySide.QtCore.QPoint`