... Since the widget is a QNPWidget, it can be used as a plugin window, // returned by Grapher ::newWindow() below. // class Graph : public QNPWidget { Q_OBJECT public: // Constructs a Graph to display a GraphModel // Graph (GraphModel ); ~ Graph (); // Two styles are available - Pie and Bar graph // enum Style { Pie, Bar }; static const char* styleName[]; void setStyle(Style); void setStyle(const char*); // Timer event processing rotates the pie ...