writing a simple linux desktop environment in c++

writing a simple linux desktop environment in c++

I would like to write a very simple Linux desktop environment or a program
that runs without a DE, and here is my requirements
the application or DE will be a IPTV player (as a IPTV set-top boxes)
1- the DE will be full screen
2- no need to run any other GUI programs, just command line programs
called through my application, so no need to window manager nor display
manager (if possible)
3-minimal services, just want to connect to LAN and read rtp (udp) streams
4-use Qt and Qt Quick to write this DE or application, and if couldn't use
openGL
5-MUST use libvlc or any other library to read and play rtp streams
6-use apt-get to install or remove packages
7- keyboard and mouse support
I am a c++ and Qt programmer and I have a good Linux administration
background
if you have any idea to help write the DE or if any existing one that run
directly on XWindow, please help
the DE will be used as if the PC a a normal DVB receiver to list channels
and select one to view