Custom-Shaped Widget

[[Po]lentino]

Hi all,
I need some help on creating a widget shaped with an icon I choosed, and with the same icon displayed.
For the first part, all is simple:

...
QDialog myDialog;
QPixmap myPixmap = QPixmap( QString::fromUTF8(":/img/logo.svg") );
myDialog.setMask( pixmap.mask() );

...
QDialog myDialog;
QPixmap myPixmap = QPixmap( QString::fromUTF8(":/img/logo.svg") );
myDialog.setMask( pixmap.mask() );

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Now, how can I embed the same .svg icon inside the shaped dialog, in order to display it ??
Or, there is a simpler way to do it ??
Thanks in advance, cheers !