dispatch

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po.dispatch(o)

Assigns on and off methods to the given object, returing a bound dispatch function. The returned function is typically assigned to the dispatch property of the same object, but this is not required.

dispatch.on(t, f)

Registers the given event listener f to receive events of type t, where f is a function and t is a string; returns this. When an event of the given type is dispatched, any registered listeners will receive the given event as a single argument to the function f. The this context of the function will be this dispatch object.

This method is similar to the W3C-specified addEventListener.

dispatch.off(t, f)

Removes the given event listener f from events of type t, where f is a function and t is a string; returns this. If the listener f is not registered to receive events of type t then this method has no effect.

This method is similar to the W3C-specified removeEventListener.

dispatch.dispatch(e)

Dispatches the given event e to any registered listeners. The event e must have a type string attribute, which determines which listeners will be notified. This method is typically not needed unless implementing a custom layer.