The QVBoxLayout class lays out child widgets in a grid. ... QGridLayout  ( QWidget * parent, int nRows, int nCols, int border=0, int autoBorder = -1, const char * name=0 )  . ... void  addWidget  ( QWidget *, int row, int col, int align = 0 )  . ... void  setRowStretch  ( int row, int stretch )  . ... QGridLayout takes the space it gets (from its parent layout or from the mainWidget ()), divides it up into rows and columns, and puts each of the child widgets it manages into the correct cell(s). ...