Using non-standard types for properties in Designer

All,

I want to use nonstandard types for the Designer properties (that show up in Property Editor) of some custom widgets that that I have writen. I would like to be able to define a struct Structure {int Val1, Val2, Val3} that would then show up in the Properties editor within Designer as

Structure
Val1
Val2
Val2

Similar to the way that QFont works. I would also like to use my own enumerations that would show up as combo boxes with in the Property Editor (like layoutDirection). I assume that I am just missing something but whenever I try to use a nonstandard type or non-QT type, the property does not show up in the Property Editor at all.

If anyone could point me in the correct direction, that would be great,

Thanks in advance for your help