Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.
One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.
QPen pen( red, 2 );
painter.begin( this ); // if it is in void in the paintEvent
painter.setPen( pen );
painter.drawLine( 40, 30, 240,130 );
painter.drawLine( 240,130, 140,80 );
painter.drawLine( 140, 80, 40,30 );
painter.end();
Basic Drawing Example
http://www.greyc.ensicaen.fr/ensicaen/Docs/Qt4/painting-basicdrawing.html