The Symbian Foundation and Nokia with Maemo (now MeeGo) are building two widget sets on top of QGraphicsView – while both are called Direct UI, they are entirely different (I’ll refer to them as SDUI and MDUI from now on).

Symbian Foundation employee Mark Wilcox is the one who seems to see the seriousness the most that it’s totally braindead to have incompatibe widget sets. Ironically MDUI seems to be the portable one. Hopefully the Foundation understands the problem now and throws away SDUI and adopts the MDUI library for Symbian.

rest here