#include <qapplication.h>#include <qmainwindow.h>#include <qtoolbar.h>#include <qaction.h>#include "labelonoff.xpm"int main( int argc, char **argv ){    QApplication app( argc, argv );    QMainWindow * window = new QMainWindow;    window->setCaption("Qt Example - Toggleaction");    QToolBar * toolbar = new QToolBar( window );    QAction * labelonoffaction = new QAction( window, "labelonoff", TRUE );      labelonoffaction->setText( "labels on/off" );     labelonoffaction->setAccel( Qt::ALT+Qt::Key_L );    labelonoffaction->setIconSet( (QPixmap) labelonoff_xpm );                                     QObject::connect( labelonoffaction, SIGNAL( toggled( bool ) ),                       window, SLOT( setUsesTextLabel( bool ) ) );    labelonoffaction->addTo( toolbar );     app.setMainWidget( window );    window->show();    return app.exec();}