QLine ¶

概要 ¶

详细描述 ¶

A QLine describes a finite length line (or a line segment) on a two-dimensional surface. The start and end points of the line are specified using integer point accuracy for coordinates. Use the QLineF constructor to retrieve a floating point copy.

The positions of the line’s start and end points can be retrieved using the p1() , x1() , y1() , p2() , x2() ，和 y2() functions. The dx() and dy() functions return the horizontal and vertical components of the line. Use isNull() to determine whether the QLine represents a valid line or a null line.

Finally, the line can be translated a given offset using the translate() 函数。

另请参阅

QLineF QPolygon QRect

class QLine ¶

QLine(QLine)

QLine(pt1, pt2)

QLine(x1, y1, x2, y2)

param QLine

QLine

param y1

int

param y2

int

param pt1

QPoint

param x1

int

param pt2

QPoint

param x2

int

Constructs a null line.

Constructs a line object that represents the line between p1 and p2 .

Constructs a line object that represents the line between ( x1 , y1 ) 和 ( x2 , y2 ).

PySide2.QtCore.QLine. __reduce__ ( ) ¶

返回类型

PyObject

PySide2.QtCore.QLine. __repr__ ( ) ¶

返回类型

PyObject

PySide2.QtCore.QLine. center ( ) ¶

返回类型

QPoint

Returns the center point of this line. This is equivalent to ( p1() + p2() ) / 2, except it will never overflow.

PySide2.QtCore.QLine. dx ( ) ¶

返回类型

int

Returns the horizontal component of the line’s vector.

另请参阅

dy()

PySide2.QtCore.QLine. dy ( ) ¶

返回类型

int

Returns the vertical component of the line’s vector.

另请参阅

dx()

PySide2.QtCore.QLine. isNull ( ) ¶

返回类型

bool

返回 true if the line is not set up with valid start and end point; otherwise returns false .

PySide2.QtCore.QLine. __ne__ ( d ) ¶

参数

d – QLine

返回类型

bool

返回 true 若给定 line is not the same as this line.

A line is different from another line if any of their start or end points differ, or the internal order of the points is different.

PySide2.QtCore.QLine. __mul__ ( m ) ¶

参数

m – QMatrix

返回类型

QLine

PySide2.QtCore.QLine. __mul__ ( m ) ¶

参数

m – QTransform

返回类型

QLine

PySide2.QtCore.QLine. __eq__ ( d ) ¶

参数

d – QLine

返回类型

bool

返回 true 若给定 line 如同 this line.

A line is identical to another line if the start and end points are identical, and the internal order of the points is the same.

PySide2.QtCore.QLine. p1 ( ) ¶

返回类型

QPoint

Returns the line’s start point.

另请参阅

setP1() x1() y1() p2()

PySide2.QtCore.QLine. p2 ( ) ¶

返回类型

QPoint

Returns the line’s end point.

另请参阅

setP2() x2() y2() p1()

PySide2.QtCore.QLine. setLine ( x1 , y1 , x2 , y2 ) ¶

参数

• x1 – int

• y1 – int

• x2 – int

• y2 – int

Sets this line to the start in x1 , y1 and end in x2 , y2 .

另请参阅

setP1() setP2() p1() p2()

PySide2.QtCore.QLine. setP1 ( p1 ) ¶

参数

p1 – QPoint

Sets the starting point of this line to p1 .

另请参阅

setP2() p1()

PySide2.QtCore.QLine. setP2 ( p2 ) ¶

参数

p2 – QPoint

Sets the end point of this line to p2 .

另请参阅

setP1() p2()

PySide2.QtCore.QLine. setPoints ( p1 , p2 ) ¶

参数

• p1 – QPoint

• p2 – QPoint

Sets the start point of this line to p1 and the end point of this line to p2 .

另请参阅

setP1() setP2() p1() p2()

PySide2.QtCore.QLine. toTuple ( ) ¶

返回类型

PyObject

PySide2.QtCore.QLine. translate ( p ) ¶

参数

p – QPoint

Translates this line by the given offset .

PySide2.QtCore.QLine. translate ( dx , dy ) ¶

参数

• dx – int

• dy – int

这是重载函数。

Translates this line the distance specified by dx and dy .

PySide2.QtCore.QLine. translated ( p ) ¶

参数

p – QPoint

返回类型

QLine

Returns this line translated by the given offset .

PySide2.QtCore.QLine. translated ( dx , dy ) ¶

参数

• dx – int

• dy – int

返回类型

QLine

这是重载函数。

Returns this line translated the distance specified by dx and dy .

PySide2.QtCore.QLine. x1 ( ) ¶

返回类型

int

Returns the x-coordinate of the line’s start point.

另请参阅

p1()

PySide2.QtCore.QLine. x2 ( ) ¶

返回类型

int

Returns the x-coordinate of the line’s end point.

另请参阅

p2()

PySide2.QtCore.QLine. y1 ( ) ¶

返回类型

int

Returns the y-coordinate of the line’s start point.

另请参阅

p1()

PySide2.QtCore.QLine. y2 ( ) ¶

返回类型

int

Returns the y-coordinate of the line’s end point.

另请参阅

p2()