Launch UI from State Actor

[Quiztus2]

The state actor template shipping with State Actor launches a UI actor, which launches a nested idle state actor.

What happens if I launch a UI in idle's actor core? Will this launch a UI everytime I switch state from running to idle?

I am asking because I find it sometimes more natural if the model launches its UI.

[justACS · Accepted solution]

You only ever launch one actor core, regardless of the number of states you have.  When I have used the state pattern actor, that actor core has belonged to the immediate child of State Actor (which I typically refer to as the "context").  That actor core runs exactly once, for the life of the state actor, so you could launch a nested actor from there.

In the example, Process State is the context actor.  It has an actor core, which actually does launch a nested actor - Process Actor.  Idle and Running do not have actor core overrides.  Launching either Idle or Running will start Process State:Actor Core, which will launch Process Actor.

[Quiztus2]

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@justACS wrote:

You only ever launch one actor core, regardless of the number of states you have.

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This was not obvious to me, but it makes complete sense.