QGridLayout Class

Member Function Documentation

QGridLayout::QGridLayout(QWidget *parent)

Constructs a new QGridLayout with parent widget, parent. The layout has one row and one column initially, and will expand when new items are inserted.

QGridLayout::QGridLayout()

Constructs a new grid layout.

You must insert this grid into another layout. You can insert widgets and layouts into this layout at any time, but laying out will not be performed before this is inserted into another layout.

QGridLayout::~QGridLayout()

Destroys the grid layout. Geometry management is terminated if this is a top-level grid.

The layout's widgets aren't destroyed.

void QGridLayout::addItem(QLayoutItem *item, int row, int column, int rowSpan = 1, int columnSpan = 1, Qt::Alignment alignment = Qt::Alignment())

Adds item at position row, column, spanning rowSpan rows and columnSpan columns, and aligns it according to alignment. If rowSpan and/or columnSpan is -1, then the item will extend to the bottom and/or right edge, respectively. The layout takes ownership of the item.

Warning: Do not use this function to add child layouts or child widget items. Use addLayout() or addWidget() instead.

[virtual protected] void QGridLayout::addItem(QLayoutItem *item)

Reimplemented from QLayout::addItem().

void QGridLayout::addLayout(QLayout *layout, int row, int column, Qt::Alignment alignment = Qt::Alignment())

Places the layout at position (row, column) in the grid. The top-left position is (0, 0).

The alignment is specified by alignment. The default alignment is 0, which means that the widget fills the entire cell.

A non-zero alignment indicates that the layout should not grow to fill the available space but should be sized according to sizeHint().

layout becomes a child of the grid layout.

void QGridLayout::addLayout(QLayout *layout, int row, int column, int rowSpan, int columnSpan, Qt::Alignment alignment = Qt::Alignment())

This is an overloaded function.

This version adds the layout layout to the cell grid, spanning multiple rows/columns. The cell will start at row, column spanning rowSpan rows and columnSpan columns.

If rowSpan and/or columnSpan is -1, then the layout will extend to the bottom and/or right edge, respectively.

void QGridLayout::addWidget(QWidget *widget, int row, int column, Qt::Alignment alignment = Qt::Alignment())

Adds the given widget to the cell grid at row, column. The top-left position is (0, 0) by default.

The alignment is specified by alignment. The default alignment is 0, which means that the widget fills the entire cell.

void QGridLayout::addWidget(QWidget *widget, int fromRow, int fromColumn, int rowSpan, int columnSpan, Qt::Alignment alignment = Qt::Alignment())

This is an overloaded function.

This version adds the given widget to the cell grid, spanning multiple rows/columns. The cell will start at fromRow, fromColumn spanning rowSpan rows and columnSpan columns. The widget will have the given alignment.

If rowSpan and/or columnSpan is -1, then the widget will extend to the bottom and/or right edge, respectively.

QRect QGridLayout::cellRect(int row, int column) const

Returns the geometry of the cell with row row and column column in the grid. Returns an invalid rectangle if row or column is outside the grid.

Warning: in the current version of Qt this function does not return valid results until setGeometry() has been called, i.e. after the parentWidget() is visible.

int QGridLayout::columnCount() const

Returns the number of columns in this grid.

int QGridLayout::columnMinimumWidth(int column) const

Returns the column spacing for column column.

See also setColumnMinimumWidth().

int QGridLayout::columnStretch(int column) const

Returns the stretch factor for column column.

See also setColumnStretch().

[virtual] int QGridLayout::count() const

Reimplemented from QLayout::count().

[virtual] Qt::Orientations QGridLayout::expandingDirections() const

Reimplemented from QLayoutItem::expandingDirections().

void QGridLayout::getItemPosition(int index, int *row, int *column, int *rowSpan, int *columnSpan) const

Returns the position information of the item with the given index.

The variables passed as row and column are updated with the position of the item in the layout, and the rowSpan and columnSpan variables are updated with the vertical and horizontal spans of the item.

See also itemAtPosition() and itemAt().

[virtual] bool QGridLayout::hasHeightForWidth() const

Reimplemented from QLayoutItem::hasHeightForWidth().

[virtual] int QGridLayout::heightForWidth(int w) const

Reimplemented from QLayoutItem::heightForWidth().

[virtual] void QGridLayout::invalidate()

Reimplemented from QLayoutItem::invalidate().

[virtual] QLayoutItem *QGridLayout::itemAt(int index) const

Reimplemented from QLayout::itemAt().

QLayoutItem *QGridLayout::itemAtPosition(int row, int column) const

Returns the layout item that occupies cell (row, column), or 0 if the cell is empty.

This function was introduced in Qt 4.4.

See also getItemPosition() and indexOf().

[virtual] QSize QGridLayout::maximumSize() const

Reimplemented from QLayoutItem::maximumSize().

[virtual] int QGridLayout::minimumHeightForWidth(int w) const

Reimplemented from QLayoutItem::minimumHeightForWidth().

[virtual] QSize QGridLayout::minimumSize() const

Reimplemented from QLayoutItem::minimumSize().

Qt::Corner QGridLayout::originCorner() const

Returns the corner that's used for the grid's origin, i.e. for position (0, 0).

See also setOriginCorner().

int QGridLayout::rowCount() const

Returns the number of rows in this grid.

int QGridLayout::rowMinimumHeight(int row) const

Returns the minimum width set for row row.

See also setRowMinimumHeight().

int QGridLayout::rowStretch(int row) const

Returns the stretch factor for row row.

See also setRowStretch().

void QGridLayout::setColumnMinimumWidth(int column, int minSize)

Sets the minimum width of column column to minSize pixels.

See also columnMinimumWidth() and setRowMinimumHeight().

void QGridLayout::setColumnStretch(int column, int stretch)

Sets the stretch factor of column column to stretch. The first column is number 0.

The stretch factor is relative to the other columns in this grid. Columns with a higher stretch factor take more of the available space.

The default stretch factor is 0. If the stretch factor is 0 and no other column in this table can grow at all, the column may still grow.

An alternative approach is to add spacing using addItem() with a QSpacerItem.

See also columnStretch() and setRowStretch().

[virtual] void QGridLayout::setGeometry(const QRect &rect)

Reimplemented from QLayoutItem::setGeometry().

void QGridLayout::setOriginCorner(Qt::Corner corner)

Sets the grid's origin corner, i.e. position (0, 0), to corner.

See also originCorner().

void QGridLayout::setRowMinimumHeight(int row, int minSize)

Sets the minimum height of row row to minSize pixels.

See also rowMinimumHeight() and setColumnMinimumWidth().

void QGridLayout::setRowStretch(int row, int stretch)

Sets the stretch factor of row row to stretch. The first row is number 0.

The stretch factor is relative to the other rows in this grid. Rows with a higher stretch factor take more of the available space.

The default stretch factor is 0. If the stretch factor is 0 and no other row in this table can grow at all, the row may still grow.

See also rowStretch(), setRowMinimumHeight(), and setColumnStretch().

void QGridLayout::setSpacing(int spacing)

This function sets both the vertical and horizontal spacing to spacing.

See also spacing(), setVerticalSpacing(), and setHorizontalSpacing().

[virtual] QSize QGridLayout::sizeHint() const

Reimplemented from QLayoutItem::sizeHint().

int QGridLayout::spacing() const

If the vertical spacing is equal to the horizontal spacing, this function returns that value; otherwise it return -1.

See also setSpacing(), verticalSpacing(), and horizontalSpacing().

[virtual] QLayoutItem *QGridLayout::takeAt(int index)

Reimplemented from QLayout::takeAt().