#include <QtGui>
int main(int argc, char* argv[])
{
QApplication app(argc, argv);
QDialog dlg;
QPushButton *btn = new QPushButton(QObject::tr("Expand/Collapse"),&dlg);
btn->setCheckable(true);
QVBoxLayout *lay = new QVBoxLayout(&dlg);
lay->addWidget(btn);
QLabel *ext = new QLabel(QObject::tr("Extension"));
dlg.setExtension(ext);
QObject::connect(btn, SIGNAL(toggled(bool)),&dlg, SLOT(showExtension(bool)));
dlg.exec();
return app.exec();
}
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