rubyx-debugger/app/main/controllers/eventable.rb
2015-07-29 20:50:39 +03:00

38 lines
1.1 KiB
Ruby

# A simple event registering/triggering module to mix into classes.
# Events are stored in the `@events` ivar.
module Eventable
# Register a handler for the given event name.
# The event name is the method name called on the handler object
#
# obj.on(:foo , some_object_that_implements foo( whateverargs)
#
# @param [String, Symbol] name event name
# @param [Object] object handling the event, ie implement the function name
# @return handler
def register_event(name, handler)
event_table[name] << handler
handler
end
def unregister_event(name, handler)
event_table[name].delete handler
end
def event_table
return @event_table if @event_table
@event_table = Hash.new { |hash, key| hash[key] = [] }
end
# Trigger the given event name and passes all args to each handler
# for this event.
#
# obj.trigger(:foo)
# obj.trigger(:foo, 1, 2, 3)
#
# @param [String, Symbol] name event name to trigger
def trigger(name, *args)
event_table[name].each { |handler| handler.send( name.to_sym , *args) }
end
end