QGraphicsScale Class Reference
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QtGui

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QGraphicsScale 类提供比例缩放变换。更多...

继承 QGraphicsTransform .

方法

__init__ ( self , QObject parent = None)
applyTo ( self , QMatrix4x4 matrix )
QVector3D origin ( self )
setOrigin ( self , QVector3D point )
setXScale ( self , float)
setYScale ( self , float)
setZScale ( self , float)
float xScale ( self )
float yScale ( self )
float zScale ( self )

Qt Signals

void originChanged ()
void scaleChanged ()
void xScaleChanged ()
void yScaleChanged ()
void zScaleChanged ()

详细描述

QGraphicsScale 类提供比例缩放变换。

QGraphicsScene 提供 certain parameters to help control how the scale should be applied.

The origin is the point that the item is scaled from (i.e., it stays fixed relative to the parent as the rest of the item grows). By default the origin is QPointF (0, 0).

参数 xScale , yScale ，和 zScale describe the scale factors to apply in horizontal, vertical, and depth directions. They can take on any value, including 0 (to collapse the item to a point) or negative value. A negative xScale value will mirror the item horizontally. A negative yScale value will flip the item vertically. A negative zScale will flip the item end for end.

方法文档编制

QGraphicsScale.init ( self , QObject parent = None)

parent argument, if not None, causes self to be owned by Qt instead of PyQt.

构造空 QGraphicsScale 对象采用给定 parent .

QGraphicsScale.applyTo ( self , QMatrix4x4 matrix )

重实现自 QGraphicsTransform.applyTo ().

QVector3D QGraphicsScale.origin ( self )

QGraphicsScale.setOrigin ( self , QVector3D point )

QGraphicsScale.setXScale ( self , float)

QGraphicsScale.setYScale ( self , float)

QGraphicsScale.setZScale ( self , float)

float QGraphicsScale.xScale ( self )