System.Internal.Event.EventHandler appMsg
A System Event Handler
default : EventHandler appMsg
Let the System decide what to do
ignore : EventHandler appMsg
Ignore the event
beforeDefault : appMsg -> EventHandler appMsg
Before the default behaviour respond with a custom appMsg
custom : appMsg -> EventHandler appMsg
Ignore the default behaviour and respond with a custom appMsg
Your components can receive Events that are being spawned by the System. It's up to your component to handle these.
{ onPIDNotFound : System.Internal.PID.PID -> EventHandler appMsg
, onStop : EventHandler appMsg
}
Components need to supply the following event handlers
systemDefault : ComponentEventHandlers appMsg
You can choose to apply a sytem default behaviour
It might be easy to start with systemDefault when specifying your components event handlers.
{ systemDefault | onStop = beforeDefault SaveProgress }
ignoreAll : ComponentEventHandlers appMsg
You can choose to ignore all events