QSpacerItem Class Reference
The QSpacerItem class provides blank space in a layout. More...
#include <QSpacerItem>Inherits: QLayoutItem.
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 ) |
Reimplemented Public Functions
| virtual Qt::Orientations | expandingDirections () const |
| virtual QRect | geometry () const |
| virtual bool | isEmpty () const |
| virtual QSize | maximumSize () const |
| virtual QSize | minimumSize () const |
| virtual void | setGeometry ( const QRect & r ) |
| virtual QSize | sizeHint () const |
| virtual QSpacerItem * | spacerItem () |
- 17 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:
| Class | Functions |
|---|---|
| QHBoxLayout | addSpacing(), addStretch(), insertSpacing(), insertStretch() |
| QGridLayout | setRowMinimumHeight(), setRowStretch(), setColumnMinimumWidth(), setColumnStretch() |
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().
Qt::Orientations QSpacerItem::expandingDirections () const [virtual]
Reimplemented from QLayoutItem::expandingDirections().
QRect QSpacerItem::geometry () const [virtual]
Reimplemented from QLayoutItem::geometry().
See also setGeometry().
bool QSpacerItem::isEmpty () const [virtual]
Reimplemented from QLayoutItem::isEmpty().
Returns true.
QSize QSpacerItem::maximumSize () const [virtual]
Reimplemented from QLayoutItem::maximumSize().
QSize QSpacerItem::minimumSize () const [virtual]
Reimplemented from QLayoutItem::minimumSize().
void QSpacerItem::setGeometry ( const QRect & r ) [virtual]
Reimplemented from QLayoutItem::setGeometry().
See also geometry().
QSize QSpacerItem::sizeHint () const [virtual]
Reimplemented from QLayoutItem::sizeHint().
QSpacerItem * QSpacerItem::spacerItem () [virtual]
Reimplemented from QLayoutItem::spacerItem().
Returns a pointer to this object.
No notes