The QPixmapCache class provides an application-global cache for pixmaps. ... QPixmap*  find  ( const char * key )  . bool  find  ( const char * key, QPixmap & )  . bool  insert  ( const char * key, QPixmap * )  . void  insert  ( const char * key, const QPixmap & )  . ... Otherwise, we create a new pixmap, draw the radio button in the pixmap and finally insert the pixmap in the global pixmap cache, using the key above. ... The cache associates a pixmap with a normal string (key). ...