LibPubSub-1.0
LibPubSub-1.0
Simple embeddable publish-subscribe implementation.
Including LibPubSub functionality
The easiest method for utilising LibPubSub is a mixin, like so:
MyAddon = LibStub('AceAddon-3.0'):NewAddon('MyAddon', 'LibPubSub-1.0')
If you're not using AceAddon, you can still embed LibPubSub in an object/table via LibPubSub's Embed() function:
LibStub('LibPubSub-1.0'):Embed(MyObject)
If you don't want to embed LibPubSub's methods in your objects, you can get a separate LibPubSub object:
local Observer = LibStub('LibPubSub-3.0'):New()
In the following examples, please replace Observer
with the right
object.
API
Observer:Publish(message, ...)
This calls all listeners subscribed to this message, and passes the arguments given after the message. Multiple objects or functions can be subscribed to the same message.
Parameters
-
message (string)
- The message to publish
-
... (mixed)
- Any arguments to pass to the listeners
Observer:Subscribe(message[, object][, function])
There are multiple ways to subscribe to messages, and multiple listeners can be attached for the same message:
Observer:Subscribe('NAME_OF_MESSAGE') -- calls Observer:NAME_OF_MESSAGE()
Observer:Subscribe('NAME_OF_MESSAGE', funcref) -- calls funcref()
Observer:Subscribe('NAME_OF_MESSAGE', 'FunctionName') -- calls Observer:FunctionName()
Observer:Subscribe('NAME_OF_MESSAGE', Object) -- calls Object:NAME_OF_MESSAGE()
Observer:Subscribe('NAME_OF_MESSAGE', Object, 'FunctionName') -- calls Object:FunctionName()
The second, third and fourth versions of attaching listeners can also be passed as a table, as shorthand for attaching listeners for multiple messages:
Observer:Subscribe({NAME_OF_MESSAGE = funcref, OTHER_MESSAGE = 'FunctionName'})
The arguments passed to the listener are the arguments passed to the
Publish
function after the message name.
Parameters
-
message (string)
- The message to subscribe to
-
object (table)
- The object the function should be called on
-
function (string/funcref)
- The function to call
Observer:Unsubscribe(message[, object][, function])
This works exactly the same as subscribing to a message. Note that you
need to pass the same arguments to Unsubscribe
as you passed to
Subscribe
to remove a listener for a message. That means that, if you
subscribed using Observer:Subscribe('NAME_OF_MESSAGE', funcref)
you
need to unsubscribe using Observer:Unsubscribe('NAME_OF_MESSAGE',
funcref)
.
The possible ways to call this function:
Observer:Unsubscribe('NAME_OF_MESSAGE')
Observer:Unsubscribe('NAME_OF_MESSAGE', funcref)
Observer:Unsubscribe('NAME_OF_MESSAGE', 'FunctionName')
Observer:Unsubscribe('NAME_OF_MESSAGE', Object)
Observer:Unsubscribe('NAME_OF_MESSAGE', Object, 'FunctionName')
Observer:Unsubscribe({NAME_OF_MESSAGE = funcref, OTHER_MESSAGE = 'FunctionName'})
Parameters
-
message (string)
- The message to unsubscribe from
-
object (table)
- The object the function would be called on
-
function (string/funcref)
- The subscribed function
Observer:UnsubscribeAll()
Removes all currently subscribed listeners immediately.
Parameters
None.
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