Slots

add

Void add(|Event| cb)

Add a listener callback function

fire

Void fire(Event? event)

Fire the event to all the listeners

isEmpty

Bool isEmpty()

Return if size is zero.

list

|Event|[] list()

Get the list of registered callback functions.

listeners

private |Event|[] listeners := |Event->Void|[,]

List of listeners

modified

internal Void modified()

Fire internal modified event

onModify

internal |EventListeners|? onModify

Callback when list of listeners is modified

remove

Void remove(|Event| cb)

Remove a listener callback function

size

Int size()

Return number of registered callback functions.