@startuml
skinparam BackgroundColor F0F0F0
participant "Application 1" as app1
participant "Application Manager" as appmgr
participant "Application 2" as app2

app1 -> appmgr: SwitchApplication("Application 2")

alt Application 1 is closeable
    appmgr -> app1: Close
else
    appmgr -> app1: Focus lost
end

app1 -> appmgr: Confirm

appmgr -> app2: Start

@enduml