Man page - qwtdyngridlayout(3)
Packages contains this manual
Manual
QwtDynGridLayout
NAMESYNOPSIS
Public Member Functions
Protected Member Functions
Detailed Description
Constructor & Destructor Documentation
QwtDynGridLayout::QwtDynGridLayout (QWidget * parent, int margin = 0, intspacing = -1) [explicit]
QwtDynGridLayout::QwtDynGridLayout (int spacing = -1) [explicit]
Member Function Documentation
void QwtDynGridLayout::addItem (QLayoutItem * item) [virtual]
uint QwtDynGridLayout::columnsForWidth (int width) const [virtual]
int QwtDynGridLayout::count () const [virtual]
Qt::Orientations QwtDynGridLayout::expandingDirections () const [virtual]
bool QwtDynGridLayout::hasHeightForWidth () const [virtual]
int QwtDynGridLayout::heightForWidth (int width) const [virtual]
bool QwtDynGridLayout::isEmpty () const [virtual]
QLayoutItem * QwtDynGridLayout::itemAt (int index) const [virtual]
uint QwtDynGridLayout::itemCount () const
void QwtDynGridLayout::layoutGrid (uint numColumns, QVector< int > &rowHeight, QVector< int > & colWidth) const [protected]
QList< QRect > QwtDynGridLayout::layoutItems (const QRect & rect, uintnumColumns) const
uint QwtDynGridLayout::maxColumns () const
int QwtDynGridLayout::maxItemWidth () const [virtual]
uint QwtDynGridLayout::numColumns () const
uint QwtDynGridLayout::numRows () const
void QwtDynGridLayout::setExpandingDirections (Qt::Orientations expanding)
void QwtDynGridLayout::setGeometry (const QRect & rect) [virtual]
void QwtDynGridLayout::setMaxColumns (uint maxColumns)
QSize QwtDynGridLayout::sizeHint () const [virtual]
void QwtDynGridLayout::stretchGrid (const QRect & rect, uint numColumns,QVector< int > & rowHeight, QVector< int > & colWidth) const[protected]
QLayoutItem * QwtDynGridLayout::takeAt (int index) [virtual]
Author
NAME
QwtDynGridLayout - The QwtDynGridLayout class lays out widgets in a grid, adjusting the number of columns and rows to the current size.
SYNOPSIS
#include <qwt_dyngrid_layout.h>
Inherits QLayout.
Public Member Functions
QwtDynGridLayout
(QWidget *, int margin=0, int spacing=-1)
QwtDynGridLayout
(int spacing=-1)
virtual
˜QwtDynGridLayout
()
Destructor.
virtual void
invalidate
()
Invalidate all internal caches.
void
setMaxColumns
(uint
maxColumns
)
uint
maxColumns
() const
Return the upper limit for the number of columns.
uint
numRows
() const
uint
numColumns
() const
virtual void
addItem
(QLayoutItem *)
Add an item to the next free position.
virtual QLayoutItem *
itemAt
(int index) const
virtual QLayoutItem *
takeAt
(int index)
virtual int
count
() const
void
setExpandingDirections
(Qt::Orientations)
virtual Qt::Orientations
expandingDirections
() const
Returns whether this layout can make use of more space than
sizeHint()
.
QList< QRect >
layoutItems
(const QRect &,
uint
numColumns
) const
virtual int
maxItemWidth
() const
virtual void
setGeometry
(const QRect &rect)
virtual bool
hasHeightForWidth
() const
virtual int
heightForWidth
(int) const
virtual QSize
sizeHint
() const
virtual bool
isEmpty
() const
uint
itemCount
() const
virtual uint
columnsForWidth
(int width) const
Calculate the number of columns for a given width.
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
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() ).
Constructor & Destructor Documentation
QwtDynGridLayout::QwtDynGridLayout (QWidget * parent, int margin = 0, intspacing = -1) [explicit]
Parameters:
parent
Parent widget
margin
Margin
spacing
Spacing
QwtDynGridLayout::QwtDynGridLayout (int spacing = -1) [explicit]
Parameters:
spacing Spacing
Member Function Documentation
void QwtDynGridLayout::addItem (QLayoutItem * item) [virtual]
Add an item to the next free position.
Parameters:
item Layout item
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()
int QwtDynGridLayout::count () const [virtual]
Returns:
Number of items in the layout
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()
bool QwtDynGridLayout::hasHeightForWidth () const [virtual]
Returns:
true: QwtDynGridLayout implements heightForWidth() .
See also:
heightForWidth()
int QwtDynGridLayout::heightForWidth (int width) const [virtual]
Returns:
The preferred height for this layout, given a width.
See also:
hasHeightForWidth()
bool QwtDynGridLayout::isEmpty () const [virtual]
Returns:
true if this layout is empty.
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()
uint QwtDynGridLayout::itemCount () const
Returns:
number of layout items
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.
QList< QRect > QwtDynGridLayout::layoutItems (const QRect & rect, uintnumColumns) 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
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()
int QwtDynGridLayout::maxItemWidth () const [virtual]
Returns:
the maximum width of all layout items
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
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
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()
void QwtDynGridLayout::setGeometry (const QRect & rect) [virtual]
Reorganizes columns and rows and resizes managed items within a rectangle.
Parameters:
rect Layout geometry
void QwtDynGridLayout::setMaxColumns (uint maxColumns)
Limit the number of columns.
Parameters:
maxColumns upper limit, 0 means unlimited
See also:
maxColumns()
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()
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()
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()
Author
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