QGraphicsLineItem ¶

概要 ¶

详细描述 ¶

PySide.QtGui.QGraphicsLineItem class provides a line item that you can add to a PySide.QtGui.QGraphicsScene .

要设置项的线条，传递 PySide.QtCore.QLineF to PySide.QtGui.QGraphicsLineItem ‘s constructor, or call the PySide.QtGui.QGraphicsLineItem.setLine() function. The PySide.QtGui.QGraphicsLineItem.line() function returns the current line. By default the line is black with a width of 0, but you can change this by calling PySide.QtGui.QGraphicsLineItem.setPen() .

PySide.QtGui.QGraphicsLineItem uses the line and the pen width to provide a reasonable implementation of PySide.QtGui.QGraphicsLineItem.boundingRect() , PySide.QtGui.QGraphicsLineItem.shape() ，和 PySide.QtGui.QGraphicsLineItem.contains() 。 PySide.QtGui.QGraphicsLineItem.paint() function draws the line using the item's associated pen.

另请参阅

PySide.QtGui.QGraphicsPathItem PySide.QtGui.QGraphicsRectItem PySide.QtGui.QGraphicsEllipseItem PySide.QtGui.QGraphicsTextItem PySide.QtGui.QGraphicsPolygonItem PySide.QtGui.QGraphicsPixmapItem 图形视图框架

class PySide.QtGui. QGraphicsLineItem ( [ parent=None [ , scene=None ] ] ) ¶

class PySide.QtGui. QGraphicsLineItem ( line [ , parent=None [ , scene=None ] ] )

class PySide.QtGui. QGraphicsLineItem ( x1 , y1 , x2 , y2 [ , parent=None [ , scene=None ] ] )

参数：	line – PySide.QtCore.QLineF scene – PySide.QtGui.QGraphicsScene parent – PySide.QtGui.QGraphicsItem y1 – PySide.QtCore.qreal x1 – PySide.QtCore.qreal y2 – PySide.QtCore.qreal x2 – PySide.QtCore.qreal

PySide.QtGui.QGraphicsLineItem. line ( ) ¶

返回类型：	PySide.QtCore.QLineF

返回项的线条，或 null 线条若未设置线条。

另请参阅

PySide.QtGui.QGraphicsLineItem.setLine()

PySide.QtGui.QGraphicsLineItem. pen ( ) ¶

返回类型：	PySide.QtGui.QPen

返回项的钢笔，或黑色 0 宽度实心钢笔若未设置钢笔。

另请参阅

PySide.QtGui.QGraphicsLineItem.setPen()

PySide.QtGui.QGraphicsLineItem. setLine ( x1 , y1 , x2 , y2 ) ¶

参数：	x1 – PySide.QtCore.qreal y1 – PySide.QtCore.qreal x2 – PySide.QtCore.qreal y2 – PySide.QtCore.qreal

这是重载函数。

Sets the item's line to be the line between ( x1 , y1 ) 和 ( x2 , y2 ).

这如同调用 setLine(QLineF(x1, y1, x2, y2)) .

PySide.QtGui.QGraphicsLineItem. setLine ( line )

参数：	line – PySide.QtCore.QLineF

将项的线条设为给定 line .

另请参阅

PySide.QtGui.QGraphicsLineItem.line()

PySide.QtGui.QGraphicsLineItem. setPen ( pen ) ¶

参数：	pen – PySide.QtGui.QPen

将项的钢笔设为 pen 。若未设置钢笔，将使用黑色 0 宽度实心钢笔绘制线条。

另请参阅

PySide.QtGui.QGraphicsLineItem.pen()