#include <qapplication.h>#include <qwidget.h>#include <qpainter.h>#include <qfont.h>class MyMainWindow:public QWidget{ public:    MyMainWindow(); private:    void paintEvent(QPaintEvent*);    QPainter *paint;};void MyMainWindow::paintEvent(QPaintEvent*){ paint = new QPainter; paint->begin(this); paint->setFont(QFont("Arial",16,QFont::Bold)); paint->drawText(20,20,260,60,AlignCenter,"Font:Arial,Size:16,Sytle:Bold"); paint->end();}MyMainWindow::MyMainWindow(){ setGeometry(100,100,300,100);}main(int argc,char **argv){ QApplication a(argc,argv); MyMainWindow w; a.setMainWidget(&w); w.show(); a.exec();}