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#include <qapplication.h>
#include <qtable.h>
#include <qmessagebox.h>

class HeaderObserver : public QObject
{
public:
	HeaderObserver( QHeader* header, QObject* parent = 0 ) : QObject( parent ), head( header )	{
		head->installEventFilter( this );	
	}
	bool eventFilter( QObject*, QEvent* e ) {
		if ( e->type() == QEvent::MouseButtonDblClick ) {
			QMouseEvent* me = (QMouseEvent*) e;
			if ( me->button() == Qt::LeftButton ) {
				int n = head->sectionAt( me->y() );
				QMessageBox::information( 0, tr("Test"), tr("Double clicked at %1").arg(n) );
			}
		}
		return false;
	}
private:
	QHeader* head;
};

int main( int argc, char** argv )
{
	QApplication app( argc, argv );
	app.connect( &app, SIGNAL( lastWindowClosed() ), SLOT( quit() ) );
	QTable t( 10, 10, 0 );
	new HeaderObserver( t.verticalHeader() );
	t.show();
	return app.exec();
}