QSpacerItem Class
The QSpacerItem class provides blank space in a layout. More...
Header: | #include <QSpacerItem> |
qmake: | QT += widgets |
Inherits: | QLayoutItem |
Public Functions
virtual | ~QSpacerItem() |
void | changeSize(int w, int h, QSizePolicy::Policy hPolicy = QSizePolicy::Minimum, QSizePolicy::Policy vPolicy = QSizePolicy::Minimum) |
Reimplemented Public Functions
virtual Qt::Orientations | expandingDirections() const override |
virtual QRect | geometry() const override |
virtual bool | isEmpty() const override |
virtual QSize | maximumSize() const override |
virtual QSize | minimumSize() const override |
virtual void | setGeometry(const QRect &r) override |
virtual QSize | sizeHint() const override |
virtual QSpacerItem * | spacerItem() override |
- 9 public functions inherited from QLayoutItem
Detailed Description
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
[virtual]
QSpacerItem::~QSpacerItem()
Destructor.
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().
[override virtual]
Qt::Orientations QSpacerItem::expandingDirections() const
[override virtual]
QRect QSpacerItem::geometry() const
See also setGeometry().
[override virtual]
bool QSpacerItem::isEmpty() const
Returns true
.
[override virtual]
QSize QSpacerItem::maximumSize() const
[override virtual]
QSize QSpacerItem::minimumSize() const
[override virtual]
void QSpacerItem::setGeometry(const QRect &r)
See also geometry().
[override virtual]
QSize QSpacerItem::sizeHint() const
[override virtual]
QSpacerItem *QSpacerItem::spacerItem()
Reimplements: QLayoutItem::spacerItem().
Returns a pointer to this object.