event.coffee

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event.coffee
¶

Event system that can be used to register callbacks that get fired during certain times in the render process.
```
class Event
  @events = {}
```

All of the supported event types

  @types = [
    "processStart"
    "processComplete"
    "renderStart"
    "renderFinished"
    "blockStarted"
    "blockFinished"
  ]

Trigger an event

  @trigger: (target, type, data) ->
    if @events[type] and @events[type].length
      for event in @events[type]
        if event.target is null or target.id is event.target.id
          event.fn.call target, data

¶

Listen for an event. Optionally bind the listen to a single CamanInstance or all CamanInstances.
```
  @listen: (target, type, fn) ->
```

Adjust arguments if target is omitted

    if typeof target is "string"
      _type = target
      _fn = type

      target = null
      type = _type
      fn = _fn

Validation

    return false if type not in @types

    @events[type] = [] if not @events[type]
    @events[type].push target: target, fn: fn

    return true

Caman.Event = Event