@startuml titlescreen startup
skinparam DefaultFontName Courier
skinparam Shadowing false

participant usc
participant "titlescreen.lua" as main
participant pageview
collections pages

usc -> main : load titlescreen.lua

activate main

group construct screens
    main -> pageview : create
    main -> pageview : set callbacks
    main -> pages : create
    main -> pages : set callbacks
    main -> usc : get persistent states
    main <-- usc
end

main -> usc : get last screen value
main <-- usc

main -> main : set last screen value as current screen

main -> pageview : set current screen as rootPage

pageview --> main : onNavigated() event
activate main

main -> usc : set current screen as last screen value
deactivate main

main -> pages : init()
activate pages

pages --> main : onInit() event fired
activate main
deactivate main

loop main render loop
    main -> pageview : render()
    pageview -> pages : render()
    activate pages
    deactivate pages
end

@enduml