I am unable to find any open source libraries to render ODF documents using C++. I found ODKit suporting Java and AODL for .NET C#.
Does any one have any idea or provide
KOffice supports ODF and is written in C++. I suspect they may have solved whatever it is you are trying to solve. http://www.koffice.org
It may not be the most elegant solution but OpenOffice itself is capable of rendering and the OOoSDK can be used from C++ as seen here for writer and here for spreadsheet.
I found a Qt source to parse ODF. Qt already has built in ODF writer.
KOffice can be an idea, but if I just want to display an odt file in a nice Qt QWidget, but I don't want to depends on DBus and a lots of Kde feature.
The Idea is to take a look a Flake and KoText libs as Thomas Zanders says on this Forum.
There is none. You're better AODL or any of the other libs available (python, perl, java, etc) and doing a binding to it