Using dbus.service.signal decorator

[Bogdan Lotko]

Hello,

Attempting to send a signal using the dbus.service.signal decorator (Python 2.6) I've encountered following problem:

  @dbus.service.signal('myInterface', 'v(sav(iii))' )
  def mySignal(self, message):
     pass
  ...
  e = Emitter(bus)
  e.mySignal( ('myString', [(1, 1, 1)]) )

Raises the "signal signature is longer than the number of arguments provided" error.

The signal to be sent on wire is:

variant   struct {
     string "myString"
     array [
        variant       struct {
             int32          1
             int32          1
             int32          1
        }
     ]
 }

I think it is exactly what 'v(sav(iii))'defines (one variant).
also ('myString', [(1, 1, 1)]) defines one struct argument

I don't understand the reason of the error in this solution.

Using another approach:

  @dbus.service.signal('myInterface', 'v' )
  def mySignal(self, message):
     pass
  ...
  e = Emitter(bus)
  ...
  arr = dbus.Array( [], signature='(iii)' )
  s1 = dbus.Struct( (1,1,1), signature='(iii)', variant_level=1 )
  arr.append(s1)
  e.mySignal( ('myString', arr) )

works as requested.

Thank you for your help,

with best regards,
-- 

*Bogdan Lotko*

b.lotko at chello.at
Phone: +43 1 2852458
Mobile: +43 676 6615012
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