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from __future__ import print_function
from gi.repository import GObject
class C(GObject.GObject):
@GObject.Signal(arg_types=(int,))
def my_signal(self, arg):
"""Decorator style signal which uses the method name as signal name and
the method as the closure.
Note that with python3 annotations can be used for argument types as follows:
@GObject.Signal
def my_signal(self, arg:int):
pass
"""
print("C: class closure for `my_signal' called with argument", arg)
@GObject.Signal
def noarg_signal(self):
"""Decoration of a signal using all defaults and no arguments."""
print("C: class closure for `noarg_signal' called")
class D(C):
def do_my_signal(self, arg):
print("D: class closure for `my_signal' called. Chaining up to C")
C.my_signal(self, arg)
def my_signal_handler(obj, arg, *extra):
print("handler for `my_signal' called with argument", arg, "and extra args", extra)
inst = C()
inst2 = D()
inst.connect("my_signal", my_signal_handler, 1, 2, 3)
inst.connect("noarg_signal", my_signal_handler, 1, 2, 3)
inst.emit("my_signal", 42)
inst.emit("noarg_signal")
inst2.emit("my_signal", 42)
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