@startuml
!theme plain
hide empty description
top to bottom direction

title Placed audio player - public state model

skinparam backgroundColor transparent
skinparam shadowing false
skinparam roundcorner 14
skinparam ArrowThickness 1.2
skinparam DefaultFontName "DejaVu Sans"
skinparam DefaultFontSize 13

skinparam state {
  BackgroundColor #F8F8F8
  BorderColor #555555
  FontColor #222222
  StartColor #555555
  EndColor #555555

  BackgroundColor<<blue>> #DCEEFF
  BorderColor<<blue>> #3A7FC4
  FontColor<<blue>> #123A63

  BackgroundColor<<green>> #E3F6E3
  BorderColor<<green>> #3C9D40
  FontColor<<green>> #1E5C22

  BackgroundColor<<purple>> #F0E6FF
  BorderColor<<purple>> #8A5CC2
  FontColor<<purple>> #4B2A73

  BackgroundColor<<orange>> #FFE8CC
  BorderColor<<orange>> #D8842A
  FontColor<<orange>> #7A4A12

  BackgroundColor<<red>> #FFE5E5
  BorderColor<<red>> #CC3333
  FontColor<<red>> #7A1F1F
}

state NotInitialized <<purple>>
state FatalError <<red>>
state Terminated <<purple>>

[*] -[#8A5CC2]-> NotInitialized

NotInitialized -[#3A7FC4]-> Initialized : init
NotInitialized -[#CC3333]-> FatalError : command before init

state Initialized {

  [*] -[#3A7FC4]-> Stopped

  state Stopped <<blue>> {
    Stopped : volume(p) / set volume
    Stopped : stop / ignore
  }

  state Playing <<orange>> {
    Playing : seek(p) / seek decoder
    Playing : volume(p) / set volume
  }

  state Paused <<green>> {
    Paused : seek(p) / seek decoder
    Paused : volume(p) / set volume
  }

  Stopped -[#D8842A]-> Playing : open(file)

  Playing -[#3C9D40]-> Paused : pause #t
  Paused -[#D8842A]-> Playing : pause #f

  Playing -[#3A7FC4]-> Stopped : audio done
  Playing -[#3A7FC4]-> Stopped : stop
  Paused -[#3A7FC4]-> Stopped : stop

  Playing -[#D8842A]-> Playing : open(new-file)

  Playing -[#3A7FC4]-> Stopped : worker exception
  Paused -[#3A7FC4]-> Stopped : worker exception
}

Initialized -[#8A5CC2]-> Terminated : quit / cleanup

FatalError -[#555555]-> [*]
Terminated -[#555555]-> [*]

@enduml