SpinButton: how to avoid calling signal handler when set_value()

[pozzugno <pozzugno gmail com>]

I have a SpinButton with an associated Adjustment. I connected a handler 
for "value-changed" signal, because I have to make something when the 
user changes the value. I sometimes need to change the value in the 
code, using set_value() method of SpinButton or Adjustment. In this 
case, I don't want to execute the signal handler.

I will try to describe the situation. I have many widgets on the window, 
mainly SpinButton (but I have Entry too). I retrieve the values from 
remote, so I use set_value() methods for each widget when the values are 
received. The user can change some values and I need to detect this, 
because I have to send the new values to remote. So I have to connect a 
custom signal handler. Of course, I have to avoid calling the signal 
handler when the values are changed by code.

Is it possible?