sig-with-foreign-struct Regress.TestObj::sig-with-foreign-struct def callback(test_obj, cr, user_param1, ...) <code>test_obj</code>

instance of that is emitting the signal

 <code>cr</code>

A cairo context.

 <code>user_param1</code>

first user parameter (if any) specified with the connect() method

<code>...</code>

additional user parameters (if any)