trusty (3) QwtDynGridLayout.3.gz

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>

   Public Member Functions
       QwtDynGridLayout (QWidget *, int margin=0, int space=-1)
       QwtDynGridLayout (int space=-1)
       virtual ~QwtDynGridLayout ()
       virtual void invalidate ()
       void setMaxCols (uint maxCols)
       uint maxCols () const
       uint numRows () const
       uint numCols () const
       virtual void addItem (QLayoutItem *)
       virtual QLayoutItem * itemAt (int index) const
       virtual QLayoutItem * takeAt (int index)
       virtual int count () const
       void setExpandingDirections (Qt::Orientations)
       virtual Qt::Orientations expandingDirections () const
       QList< QRect > layoutItems (const QRect &, uint numCols) 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

   Protected Member Functions
       void layoutGrid (uint numCols, QVector< int > &rowHeight, QVector< int > &colWidth) const
       void stretchGrid (const QRect &rect, uint numCols, 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 maxCols()).

Constructor & Destructor Documentation

   QwtDynGridLayout::QwtDynGridLayout (QWidget *parent, intmargin = 0, intspacing = -1) [explicit] Parameters:
           parent Parent widget
           margin Margin
           spacing Spacing

   QwtDynGridLayout::QwtDynGridLayout (intspacing = -1) [explicit] Parameters:
           spacing Spacing

   QwtDynGridLayout::~QwtDynGridLayout () [virtual]
       Destructor.

Member Function Documentation

   void QwtDynGridLayout::addItem (QLayoutItem *item) [virtual]
       Adds item to the next free position.

   uint QwtDynGridLayout::columnsForWidth (intwidth) 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:
           maxCols(), setMaxCols()

   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.
       See also:
           setExpandingDirections()

   bool QwtDynGridLayout::hasHeightForWidth () const [virtual] Returns:
           true: QwtDynGridLayout implements heightForWidth.

       See also:
           heightForWidth()

   int QwtDynGridLayout::heightForWidth (intwidth) const [virtual] Returns:
           The preferred height for this layout, given the width w.

       See also:
           hasHeightForWidth()

   void QwtDynGridLayout::invalidate () [virtual]
       Invalidate all internal caches.

   bool QwtDynGridLayout::isEmpty () const [virtual] Returns:
           true if this layout is empty.

   QLayoutItem * QwtDynGridLayout::itemAt (intindex) const [virtual] Find the item at a spcific index
       Parameters:
           index Index

       See also:
           takeAt()

   uint QwtDynGridLayout::itemCount () const Returns:
           number of layout items

   void QwtDynGridLayout::layoutGrid (uintnumCols, QVector< int > &rowHeight, QVector< 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.

   QList< QRect > QwtDynGridLayout::layoutItems (const QRect &rect, uintnumCols) 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:
           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:
           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:
           numCols()

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

   void QwtDynGridLayout::setExpandingDirections (Qt::Orientationsexpanding) 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 widgets within the rectangle rect.
       Parameters:
           rect Layout geometry

   void QwtDynGridLayout::setMaxCols (uintmaxCols) Limit the number of columns.
       Parameters:
           maxCols upper limit, 0 means unlimited

       See also:
           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:
           maxCols(), setMaxCols()

   void QwtDynGridLayout::stretchGrid (const QRect &rect, uintnumCols, 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.
       See also:
           setExpanding(), expanding()

   QLayoutItem * QwtDynGridLayout::takeAt (intindex) [virtual] Find the item at a spcific index and remove it
       from the layout
       Parameters:
           index Index

       See also:
           itemAt()

Author

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