Qt draws block diagram

[Imio]

Hi everyone
I want to use Qt to draw the block diagram of a machine that I can see the the overview of my machine, each block's status (indicated by its color), the connection between these blocks and the status will be automatically updated after sometime. The block diagram is drew by simply rectangle, line, and text.
My issue is I dont know which method I should use to perform it ( which Qt's tool?, library or function should I use)

Could anyone help me
Thanks ( I'm sorry because of my bad English)

[Santosh Reddy]

Start here http://doc.qt.nokia.com/4.7/qgraphicsview.html