[Qt-creator] Drawing on QWidget

[Alex Williams]

> Don't exaggerate... If you look through the QWidget's documentation, sooner
> or later, you must see the paintEvent() method and it's described really
> well...

OK, sorry... I looked at QPainter documentation only. Thank you all for help.
P.S.
I'm just comparing effort of starting to paint with other toolkits :)
VCL - 5 minutes, wxWidgets - 1 hour, Qt - 4 days :)