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from thread_utils import *
MONITOR_PRIORITY = "monitor"
HIGHEST_PRIORITY = "highest"
HIGH_PRIORITY = "high"
NORMAL_PRIORITY = "normal"
LOW_PRIORITY = "low"
LOWEST_PRIORITY = "lowest"
priorities = ["lowest","low","normal","high","highest","monitor"]
events = []
class base_event():
def __init__(self,event_name):
self.name = event_name
self.cancelled = False
self._handlers = [ [],[],[],[],[],[] ]
self.cancelled_lock = threading.Lock()
def add_handler(self,function,priority):
for prior in priorities:
if prior == priority:
self._handlers[priorities.index(prior)].append(function)
def call(self,*args):
for priority in self._handlers:
for handler in priority:
handler(self,*args)
def set_cancelled(self,state):
with self.cancelled_lock:
self.cancelled = state
class utils_events(base_event):
def __init__(self,event_name):
base_event.__init__(self,event_name)
def add_event(event_name, event_class = base_event):
"""
# Adds a new event type of the given class with the given name
"""
event = event_class(event_name)
events.append(event)
def call_event(event_name,*args):
"""
# Calls the ehe event with the given arguments
"""
for event in events:
if event.name == event_name:
event.call(*args)
return event
def check_events(event_name):
"""
# Returns whether there is an event with the name event_name
"""
for event in events:
if event.name == event_name:
return True
return False
#Decorator
def utils_event(event_name, priority, create_event=base_event):
def event_decorator(function):
def wrapper(*args, **kwargs):
pass
if not check_events(event_name): #Check if the event exists, if not create it.
add_event(event_name,create_event)
for event in events: #Go through the list of events, find the one we need and call all of its handlers
if event.name == event_name:
event.add_handler(function,priority)
return wrapper
return event_decorator
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