@startuml
participant "Battery Charger" as bc
participant "Worker Event" as we
participant "Event Manager" as evm
participant "System Manager" as sm
participant "Current application" as ca
participant "TopBar" as tb
participant "Battery Widget" as bw
participant "Event Store\nBattery" as es

bc -> we : Interrupt
we -> bc : Store status to EventStore
bc -> es : modify()
we -> evm : BatteryStatusChangeMessage
group If Discharging
    evm -> sm : BatteryStatusChangeMessage
    sm -> sm : If State::ShutdownReady:\n state = State:Shutdown
end
evm -> ca : BatteryStatusChangeMessage
ca -> tb : updateBattery()
tb <-> es : get() 
tb -> bw : show(batteryContext)

@enduml