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QwtDynGridLayout Class Reference

List of all members.

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 maxCols()).


Public Member Functions

 QwtDynGridLayout (QWidget *, int margin=0, int space=-1, const char *name=0)
 QwtDynGridLayout (QLayout *, int space=-1, const char *name=0)
 QwtDynGridLayout (int space=-1, const char *name=0)
virtual ~QwtDynGridLayout ()
void setMaxCols (uint maxCols)
uint maxCols () const
uint numRows () const
uint numCols () const
virtual void addItem (QLayoutItem *)
virtual QLayoutIterator iterator ()
virtual int maxItemWidth () const
virtual void setGeometry (const QRect &rect)
virtual bool hasHeightForWidth () const
virtual int heightForWidth (int) const
virtual QSize sizeHint () const
void setExpanding (QSizePolicy::ExpandData)
virtual QSizePolicy::ExpandData expanding () const
virtual bool isEmpty () const
virtual uint columnsForWidth (int width) const
QValueList< QRect > layoutItems (const QRect &, uint numCols) const

Protected Member Functions

void layoutGrid (uint numCols, QwtArray< int > &rowHeight, QwtArray< int > &colWidth) const
void stretchGrid (const QRect &rect, uint numCols, QwtArray< int > &rowHeight, QwtArray< int > &colWidth) const


Constructor & Destructor Documentation

QwtDynGridLayout::QwtDynGridLayout QWidget *  parent,
int  margin = 0,
int  space = -1,
const char *  name = 0
 

Parameters:
parent Parent widget
margin Margin
space Spacing
name Widget name

QwtDynGridLayout::QwtDynGridLayout QLayout *  parent,
int  space = -1,
const char *  name = 0
 

Parameters:
parent Parent widget
space Spacing
name Widget name

QwtDynGridLayout::QwtDynGridLayout int  space = -1,
const char *  name = 0
 

Parameters:
space Spacing
name Widget name

QwtDynGridLayout::~QwtDynGridLayout  )  [virtual]
 

Destructor.


Member Function Documentation

void QwtDynGridLayout::addItem QLayoutItem *   )  [virtual]
 

Adds item to the next free position.

uint QwtDynGridLayout::columnsForWidth int  width  )  const [virtual]
 

Calculate the number of columns for a given width. It tries to use as many columns as possible (limited by maxCols())

Parameters:
width Available width for all columns
See also:
QwtDynGridLayout::maxCols(), QwtDynGridLayout::setMaxCols()

QSizePolicy::ExpandData QwtDynGridLayout::expanding  )  const [virtual]
 

Returns whether this layout can make use of more space than sizeHint(). A value of Vertical or Horizontal means that it wants to grow in only one dimension, while BothDirections means that it wants to grow in both dimensions.

See also:
QwtDynGridLayout::setExpanding()

bool QwtDynGridLayout::hasHeightForWidth  )  const [virtual]
 

Returns:
TRUE: QwtDynGridLayout implements heightForWidth.
See also:
QwtDynGridLayout::heightForWidth()

int QwtDynGridLayout::heightForWidth int  width  )  const [virtual]
 

Returns:
The preferred height for this layout, given the width w.
See also:
QwtDynGridLayout::hasHeightForWidth()

bool QwtDynGridLayout::isEmpty  )  const [virtual]
 

Returns:
TRUE if this layout is empty.

QLayoutIterator QwtDynGridLayout::iterator  )  [virtual]
 

Returns:
An iterator over the children of this layout.

void QwtDynGridLayout::layoutGrid uint  numCols,
QwtArray< int > &  rowHeight,
QwtArray< int > &  colWidth
const [protected]
 

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

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

QValueList< QRect > QwtDynGridLayout::layoutItems const QRect &  rect,
uint  numCols
const
 

Calculate the geometries of the layout items for a layout with numCols columns and a given rect.

Parameters:
rect Rect where to place the items
numCols Number of columns
Returns:
item geometries

uint QwtDynGridLayout::maxCols  )  const
 

Return the upper limit for the number of columns. 0 means unlimited, what is the default.

See also:
QwtDynGridLayout::setMaxCols()

int QwtDynGridLayout::maxItemWidth  )  const [virtual]
 

Returns:
the maximum width of all layout items

uint QwtDynGridLayout::numCols  )  const
 

Returns:
Number of columns of the current layout.
See also:
QwtDynGridLayout::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:
QwtDynGridLayout::numCols
Warning:
The number of rows might change whenever the geometry changes

void QwtDynGridLayout::setExpanding QSizePolicy::ExpandData  expanding  ) 
 

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

See also:
QwtDynGridLayout::expanding()

void QwtDynGridLayout::setGeometry const QRect &  rect  )  [virtual]
 

Reorganizes columns and rows and resizes managed widgets within the rectangle rect.

void QwtDynGridLayout::setMaxCols uint  maxCols  ) 
 

Limit the number of columns.

Parameters:
maxCols upper limit, 0 means unlimited
See also:
QwtDynGridLayout::maxCols()

QSize QwtDynGridLayout::sizeHint  )  const [virtual]
 

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

See also:
QwtDynGridLayout::maxCols(), QwtDynGridLayout::setMaxCols()

void QwtDynGridLayout::stretchGrid const QRect &  rect,
uint  numCols,
QwtArray< int > &  rowHeight,
QwtArray< 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.

See also:
QwtDynGridLayout::setExpanding(), QwtDynGridLayout::expanding()


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