QSpacerItem Class Reference
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QtGui

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QSpacerItem 类在布局中提供空白空间。更多...

方法

__init__ ( self , int w , int h , QSizePolicy.Policy hPolicy = QSizePolicy.Minimum, QSizePolicy.Policy vPolicy = QSizePolicy.Minimum)
__init__ ( self , QSpacerItem)
changeSize ( self , int w , int h , QSizePolicy.Policy hPolicy = QSizePolicy.Minimum, QSizePolicy.Policy vPolicy = QSizePolicy.Minimum)
Qt.Orientations expandingDirections ( self )
QRect geometry ( self )
bool isEmpty ( self )
QSize maximumSize ( self )
QSize minimumSize ( self )
setGeometry ( self , QRect)
QSize sizeHint ( self )
QSpacerItem spacerItem ( self )

详细描述

QSpacerItem 类在布局中提供空白空间。

Normally, you don't need to use this class directly. Qt's built-in layout managers provide the following functions for manipulating empty space in layouts:

Class	函数
QHBoxLayout	addSpacing() , addStretch() , insertSpacing() , insertStretch()
QGridLayout	setRowMinimumHeight() , setRowStretch() , setColumnMinimumWidth() , setColumnStretch()

方法文档编制

QSpacerItem.init ( self , int w , int h , QSizePolicy.Policy hPolicy = QSizePolicy.Minimum, QSizePolicy.Policy vPolicy = QSizePolicy.Minimum)

Constructs a spacer item with preferred width w , preferred height h , horizontal size policy hPolicy and vertical size policy vPolicy .

The default values provide a gap that is able to stretch if nothing else wants the space.

QSpacerItem.init ( self , QSpacerItem )

QSpacerItem.changeSize ( self , int w , int h , QSizePolicy.Policy hPolicy = QSizePolicy.Minimum, QSizePolicy.Policy vPolicy = QSizePolicy.Minimum)

Changes this spacer item to have preferred width w , preferred height h , horizontal size policy hPolicy and vertical size policy vPolicy .

The default values provide a gap that is able to stretch if nothing else wants the space.

Note that if changeSize() is called after the spacer item has been added to a layout, it is necessary to invalidate the layout in order for the spacer item's new size to take effect.

另请参阅 QSpacerItem.invalidate ().