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QSpacerItem Class Reference
^{[QtGui module]}

The QSpacerItem class provides blank space in a layout. More...

 #include <QSpacerItem>

Inherits QLayoutItem.

• List of all members, including inherited members

Public Functions

• QSpacerItem ( int w, int h, QSizePolicy::Policy hPolicy = QSizePolicy::Minimum, QSizePolicy::Policy vPolicy = QSizePolicy::Minimum )
• void changeSize ( int w, int h, QSizePolicy::Policy hPolicy = QSizePolicy::Minimum, QSizePolicy::Policy vPolicy = QSizePolicy::Minimum )
• virtual bool isEmpty () const
• virtual QSpacerItem * spacerItem ()

• 16 public functions inherited from QLayoutItem

Detailed Description

The QSpacerItem class provides blank space in a layout.

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:

See also QLayout, QWidgetItem, and QLayoutItem::spacerItem().

Member Function Documentation

QSpacerItem::QSpacerItem ( 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.

void QSpacerItem::changeSize ( 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.

See also QSpacerItem::invalidate().

bool QSpacerItem::isEmpty () const   [virtual]

Returns true.

Reimplemented from QLayoutItem.

QSpacerItem * QSpacerItem::spacerItem ()   [virtual]

Returns a pointer to this object.

Reimplemented from QLayoutItem.