client.connect(): refresh display while waiting for return

[deebee.italia]

If I use client.connect(), I can't execute any method until it returns.
How can I perform an execution of a method during the waiting ot client.connect() return?

I could use interrupts, but if the method is a long-time method, I obtain a guru meditation (I know that only short and fast methods can be executed inside an interrupt).

Any help?
Thank you!