The QwtDynGridLayout class lays out widgets in a grid, adjusting the number of columns and rows to the current size. More...

#include <qwt_dyngrid_layout.h>

Inheritance diagram for QwtDynGridLayout:

[legend]

Classes
class	PrivateData

Public Member Functions
virtual void	addItem (QLayoutItem *) QWT_OVERRIDE
	Add an item to the next free position. More...

virtual uint	columnsForWidth (int width) const
	Calculate the number of columns for a given width. More...

virtual int	count () const QWT_OVERRIDE

virtual Qt::Orientations	expandingDirections () const QWT_OVERRIDE
	Returns whether this layout can make use of more space than sizeHint(). More...

virtual bool	hasHeightForWidth () const QWT_OVERRIDE

virtual int	heightForWidth (int) const QWT_OVERRIDE

virtual void	invalidate () QWT_OVERRIDE
	Invalidate all internal caches. More...

virtual bool	isEmpty () const QWT_OVERRIDE

virtual QLayoutItem *	itemAt (int index) const QWT_OVERRIDE

uint	itemCount () const

QList< QRect >	layoutItems (const QRect &, uint numColumns) const

uint	maxColumns () const
	Return the upper limit for the number of columns. More...

virtual int	maxItemWidth () const

uint	numColumns () const

uint	numRows () const

	QwtDynGridLayout (int spacing=-1)

	QwtDynGridLayout (QWidget *, int margin=0, int spacing=-1)

void	setExpandingDirections (Qt::Orientations)

virtual void	setGeometry (const QRect &) QWT_OVERRIDE

void	setMaxColumns (uint maxColumns)

virtual QSize	sizeHint () const QWT_OVERRIDE

virtual QLayoutItem *	takeAt (int index) QWT_OVERRIDE

virtual	~QwtDynGridLayout ()
	Destructor. More...

Protected Member Functions
void	layoutGrid (uint numColumns, QVector< int > &rowHeight, QVector< int > &colWidth) const

void	stretchGrid (const QRect &rect, uint numColumns, QVector< int > &rowHeight, QVector< int > &colWidth) const

Private Member Functions
void	init ()

int	maxRowWidth (int numColumns) const

Private Attributes
PrivateData *	m_data

Detailed Description

The QwtDynGridLayout class lays out widgets in a grid, adjusting the number of columns and rows to the current size.

QwtDynGridLayout takes the space it gets, divides it up into rows and columns, and puts each of the widgets it manages into the correct cell(s). It lays out as many number of columns as possible (limited by maxColumns()).

Definition at line 27 of file qwt_dyngrid_layout.h.

Constructor & Destructor Documentation

◆ QwtDynGridLayout() [1/2]

QwtDynGridLayout::QwtDynGridLayout	(	QWidget *	parent,
		int	margin = `0`,
		int	spacing = `-1`
	)

explicit

Parameters

parent	Parent widget
margin	Margin
spacing	Spacing

Definition at line 58 of file qwt_dyngrid_layout.cpp.

◆ QwtDynGridLayout() [2/2]

QwtDynGridLayout::QwtDynGridLayout ( int spacing = -1 )

explicit

Parameters

spacing Spacing

Definition at line 71 of file qwt_dyngrid_layout.cpp.

◆ ~QwtDynGridLayout()

QwtDynGridLayout::~QwtDynGridLayout ( )

virtual

Destructor.

Definition at line 88 of file qwt_dyngrid_layout.cpp.

Member Function Documentation

◆ addItem()

void QwtDynGridLayout::addItem ( QLayoutItem * item )

virtual

Add an item to the next free position.

Parameters

item	Layout item

Definition at line 128 of file qwt_dyngrid_layout.cpp.

◆ columnsForWidth()

uint QwtDynGridLayout::columnsForWidth ( int width ) const

virtual

Calculate the number of columns for a given width.

The calculation tries to use as many columns as possible ( limited by maxColumns() )

Parameters

width Available width for all columns

Returns: Number of columns for a given width

See also: maxColumns(), setMaxColumns()

Definition at line 256 of file qwt_dyngrid_layout.cpp.

◆ count()

int QwtDynGridLayout::count ( ) const

virtual

Returns: Number of items in the layout

Definition at line 182 of file qwt_dyngrid_layout.cpp.

◆ expandingDirections()

Qt::Orientations QwtDynGridLayout::expandingDirections ( ) const

virtual

Returns whether this layout can make use of more space than sizeHint().

A value of Qt::Vertical or Qt::Horizontal means that it wants to grow in only one dimension, while Qt::Vertical | Qt::Horizontal means that it wants to grow in both dimensions.

Returns: Orientations, where the layout expands

See also: setExpandingDirections()

Definition at line 211 of file qwt_dyngrid_layout.cpp.

◆ hasHeightForWidth()

bool QwtDynGridLayout::hasHeightForWidth ( ) const

virtual

Returns: true: QwtDynGridLayout implements heightForWidth().

See also: heightForWidth()

Definition at line 446 of file qwt_dyngrid_layout.cpp.

◆ heightForWidth()

int QwtDynGridLayout::heightForWidth ( int width ) const

virtual

Returns: The preferred height for this layout, given a width.

See also: hasHeightForWidth()

Definition at line 455 of file qwt_dyngrid_layout.cpp.

◆ init()

void QwtDynGridLayout::init ( )

private

Initialize the layout with default values.

Definition at line 80 of file qwt_dyngrid_layout.cpp.

◆ invalidate()

void QwtDynGridLayout::invalidate ( )

virtual

Invalidate all internal caches.

Definition at line 95 of file qwt_dyngrid_layout.cpp.

◆ isEmpty()

bool QwtDynGridLayout::isEmpty ( ) const

virtual

Returns: true if this layout is empty.

Definition at line 137 of file qwt_dyngrid_layout.cpp.

◆ itemAt()

QLayoutItem * QwtDynGridLayout::itemAt ( int index ) const

virtual

Find the item at a specific index

Parameters

index Index

Returns: Item at a specific index

See also: takeAt()

Definition at line 157 of file qwt_dyngrid_layout.cpp.

◆ itemCount()

uint QwtDynGridLayout::itemCount ( ) const

Returns: number of layout items

Definition at line 145 of file qwt_dyngrid_layout.cpp.

◆ layoutGrid()

void QwtDynGridLayout::layoutGrid	(	uint	numColumns,
		QVector< int > &	rowHeight,
		QVector< int > &	colWidth
	)		const

protected

Calculate the dimensions for the columns and rows for a grid of numColumns columns.

Parameters

numColumns	Number of columns.
rowHeight	Array where to fill in the calculated row heights.
colWidth	Array where to fill in the calculated column widths.

Definition at line 419 of file qwt_dyngrid_layout.cpp.

◆ layoutItems()

QList< QRect > QwtDynGridLayout::layoutItems	(	const QRect &	rect,
		uint	numColumns
	)		const

Calculate the geometries of the layout items for a layout with numColumns columns and a given rectangle.

Parameters

rect	Rect where to place the items
numColumns	Number of columns

Returns: item geometries

Definition at line 344 of file qwt_dyngrid_layout.cpp.

◆ maxColumns()

uint QwtDynGridLayout::maxColumns ( ) const

Return the upper limit for the number of columns.

0 means unlimited, what is the default.

Returns: Upper limit for the number of columns

See also: setMaxColumns()

Definition at line 119 of file qwt_dyngrid_layout.cpp.

◆ maxItemWidth()

int QwtDynGridLayout::maxItemWidth ( ) const

virtual

Returns: the maximum width of all layout items

Definition at line 316 of file qwt_dyngrid_layout.cpp.

◆ maxRowWidth()

int QwtDynGridLayout::maxRowWidth ( int numColumns ) const

private

Calculate the width of a layout for a given number of columns.

Parameters

numColumns	Given number of columns
itemWidth	Array of the width hints for all items

Definition at line 285 of file qwt_dyngrid_layout.cpp.

◆ numColumns()

uint QwtDynGridLayout::numColumns ( ) const

Returns: Number of columns of the current layout.

See also: numRows()

Warning: The number of columns might change whenever the geometry changes

Definition at line 596 of file qwt_dyngrid_layout.cpp.

◆ numRows()

uint QwtDynGridLayout::numRows ( ) const

Returns: Number of rows of the current layout.

See also: numColumns()

Warning: The number of rows might change whenever the geometry changes

Definition at line 586 of file qwt_dyngrid_layout.cpp.

◆ setExpandingDirections()

void QwtDynGridLayout::setExpandingDirections ( Qt::Orientations expanding )

Set whether this layout can make use of more space than sizeHint(). A value of Qt::Vertical or Qt::Horizontal means that it wants to grow in only one dimension, while Qt::Vertical | Qt::Horizontal means that it wants to grow in both dimensions. The default value is 0.

Parameters

expanding Or'd orientations

See also: expandingDirections()

Definition at line 196 of file qwt_dyngrid_layout.cpp.

◆ setGeometry()

void QwtDynGridLayout::setGeometry ( const QRect & rect )

virtual

Reorganizes columns and rows and resizes managed items within a rectangle.

Parameters

rect	Layout geometry

Definition at line 222 of file qwt_dyngrid_layout.cpp.

◆ setMaxColumns()

void QwtDynGridLayout::setMaxColumns ( uint maxColumns )

Limit the number of columns.

Parameters

maxColumns upper limit, 0 means unlimited

See also: maxColumns()

Definition at line 106 of file qwt_dyngrid_layout.cpp.

◆ sizeHint()

QSize QwtDynGridLayout::sizeHint ( ) const

virtual

Return the size hint. If maxColumns() > 0 it is the size for a grid with maxColumns() columns, otherwise it is the size for a grid with only one row.

Returns: Size hint

See also: maxColumns(), setMaxColumns()

Definition at line 550 of file qwt_dyngrid_layout.cpp.

◆ stretchGrid()

void QwtDynGridLayout::stretchGrid	(	const QRect &	rect,
		uint	numColumns,
		QVector< int > &	rowHeight,
		QVector< int > &	colWidth
	)		const

protected

Stretch columns in case of expanding() & QSizePolicy::Horizontal and rows in case of expanding() & QSizePolicy::Vertical to fill the entire rect. Rows and columns are stretched with the same factor.

Parameters

rect	Bounding rectangle
numColumns	Number of columns
rowHeight	Array to be filled with the calculated row heights
colWidth	Array to be filled with the calculated column widths

See also: setExpanding(), expanding()

Definition at line 491 of file qwt_dyngrid_layout.cpp.

◆ takeAt()

QLayoutItem * QwtDynGridLayout::takeAt ( int index )

virtual

Find the item at a specific index and remove it from the layout

Parameters

index Index

Returns: Layout item, removed from the layout

See also: itemAt()

Definition at line 172 of file qwt_dyngrid_layout.cpp.

Member Data Documentation

◆ m_data

PrivateData* QwtDynGridLayout::m_data

private

Definition at line 80 of file qwt_dyngrid_layout.h.

The documentation for this class was generated from the following files:

Classes

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ QwtDynGridLayout() [1/2]

◆ QwtDynGridLayout() [2/2]

◆ ~QwtDynGridLayout()

Member Function Documentation

◆ addItem()

◆ columnsForWidth()

◆ count()

◆ expandingDirections()

◆ hasHeightForWidth()

◆ heightForWidth()

◆ init()

◆ invalidate()

◆ isEmpty()

◆ itemAt()

◆ itemCount()

◆ layoutGrid()

◆ layoutItems()

◆ maxColumns()

◆ maxItemWidth()

◆ maxRowWidth()

◆ numColumns()

◆ numRows()

◆ setExpandingDirections()

◆ setGeometry()

◆ setMaxColumns()

◆ sizeHint()

◆ stretchGrid()

◆ takeAt()

Member Data Documentation

◆ m_data