QwtDynGridLayout(3) Qwt User's Guide QwtDynGridLayout(3) NAME QwtDynGridLayout - The QwtDynGridLayout class lays out widgets in a grid, adjusting the number of columns and rows to the current size. SYNOPSIS #include Inherits QLayout. Public Member Functions QwtDynGridLayout (QWidget *, int margin=0, int spacing=-1) QwtDynGridLayout (int spacing=-1) virtual ~QwtDynGridLayout () Destructor. virtual void invalidate () override 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 *) override Add an item to the next free position. virtual QLayoutItem * itemAt (int index) const override virtual QLayoutItem * takeAt (int index) override virtual int count () const override void setExpandingDirections (Qt::Orientations) virtual Qt::Orientations expandingDirections () const override 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 &) override virtual bool hasHeightForWidth () const override virtual int heightForWidth (int) const override virtual QSize sizeHint () const override virtual bool isEmpty () const override 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()). Definition at line 27 of file qwt_dyngrid_layout.h. Constructor & Destructor Documentation 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::QwtDynGridLayout (int spacing = -1) [explicit] Parameters spacing Spacing Definition at line 71 of file qwt_dyngrid_layout.cpp. Member Function Documentation void QwtDynGridLayout::addItem (QLayoutItem * item) [override], [virtual] Add an item to the next free position. Parameters item Layout item Definition at line 128 of file qwt_dyngrid_layout.cpp. 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. int QwtDynGridLayout::count () const [override], [virtual] Returns Number of items in the layout Definition at line 182 of file qwt_dyngrid_layout.cpp. Qt::Orientations QwtDynGridLayout::expandingDirections () const [override], [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. bool QwtDynGridLayout::hasHeightForWidth () const [override], [virtual] Returns true: QwtDynGridLayout implements heightForWidth(). See also heightForWidth() Definition at line 446 of file qwt_dyngrid_layout.cpp. int QwtDynGridLayout::heightForWidth (int width) const [override], [virtual] Returns The preferred height for this layout, given a width. See also hasHeightForWidth() Definition at line 455 of file qwt_dyngrid_layout.cpp. bool QwtDynGridLayout::isEmpty () const [override], [virtual] Returns true if this layout is empty. Definition at line 137 of file qwt_dyngrid_layout.cpp. QLayoutItem * QwtDynGridLayout::itemAt (int index) const [override], [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. uint QwtDynGridLayout::itemCount () const Returns number of layout items Definition at line 145 of file qwt_dyngrid_layout.cpp. 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. 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. 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. int QwtDynGridLayout::maxItemWidth () const [virtual] Returns the maximum width of all layout items Definition at line 316 of file qwt_dyngrid_layout.cpp. 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. 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. 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. void QwtDynGridLayout::setGeometry (const QRect & rect) [override], [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. 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. QSize QwtDynGridLayout::sizeHint () const [override], [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. 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. QLayoutItem * QwtDynGridLayout::takeAt (int index) [override], [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. Author Generated automatically by Doxygen for Qwt User's Guide from the source code. Version 6.2.0 Sun Jul 18 2021 QwtDynGridLayout(3)