# Defold Druid UI Library

# Module `DruidEvent`

Lua event small library

## Functions

initialize(self, initial_callback) | Event constructur
subscribe(self, callback) | Subscribe callback on event
unsubscribe(self, callback) | Unsubscribe callback on event
is_exist(self) | Return true, if event have at lease one handler
clear(self) | Clear the all event handlers
trigger(self, ...) | Trigger the event and call all subscribed callbacks

## Functions

initialize(self, initial_callback)
  Event constructur

  ### Parameters:

  - self DruidEvent
  - initial_callback function Subscribe the callback on new event, if callback exist
subscribe(self, callback)
  Subscribe callback on event

  ### Parameters:

  - self DruidEvent
  - callback function Callback itself
unsubscribe(self, callback)
  Unsubscribe callback on event

  ### Parameters:

  - self DruidEvent
  - callback function Callback itself
is_exist(self)
  Return true, if event have at lease one handler

  ### Parameters:

  - self DruidEvent

  ### Returns:

  bool True if event have handlers
clear(self)
  Clear the all event handlers

  ### Parameters:

  - self DruidEvent
trigger(self, ...)
  Trigger the event and call all subscribed callbacks

  ### Parameters:

  - self DruidEvent
  - ... any All event params

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