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klippy: Add a basic event dispatch mechanism 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-10-07 12:22:10 -04:00
parent fedf90680e
commit 216905ceca
1 changed files with 5 additions and 0 deletions
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klippy/klippy.py
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@ -58,6 +58,7 @@ class Printer:
self.is_shutdown = False
self.run_result = None
self.state_cb = [gc.printer_state]
self.event_handlers = {}
def get_start_args(self):
return self.start_args
def get_reactor(self):
@ -188,6 +189,10 @@ class Printer:
def invoke_async_shutdown(self, msg):
self.reactor.register_async_callback(
(lambda e: self.invoke_shutdown(msg)))
def register_event_handler(self, event, callback):
self.event_handlers.setdefault(event, []).append(callback)
def send_event(self, event, *params):
return [cb(*params) for cb in self.event_handlers.get(event, [])]
def request_exit(self, result):
self.run_result = result
self.reactor.end()