This example demontrates several drawing functions and printer output. ... DrawThing ourDrawFunctions[] = { { drawColorWheel, Draw color wheel }, { drawFonts, Draw fonts }, { drawShapes, Draw shapes }, { drawPathText, Draw path text }, { 0, 0 } }; // // DrawView has installable draw routines, just add a function pointer // and a text in the table above. // class DrawView : public QWindow { Q_OBJECT public: DrawView (); public slots: void updateIt( int ); ...