@startuml

title Show/Hide Onscreenapp Sequence

actor User
entity HomeScreen_Service as HSS
entity App
entity Onscreenapp
entity WindowManagere as WM

== show Onscreenapp ==
User->App: display Onscreenapp by user operation
App->HSS: subscribe replyShowWindow event
App->HSS: call showWindow()
note right
{ "application_id": "onscreenapp", 
  "parameter": { 
    "file": "qml file path", 
    "data": {...}
  }
}
end note
HSS->HSS: get app's id
HSS->Onscreenapp: push showWindow event
note right
{ "application_id": "onscreenapp", 
  "parameter": {
    "file": "qml file path", 
    "data": {...},
    "replyid": "app's id"
 }
}
end note
Onscreenapp->WM: activateWindow("on_screen.app")

alt display able
WM->Onscreenapp: SyncDraw
Onscreenapp->Onscreenapp: load app's qml
Onscreenapp->WM: EndDraw("on_screen.app")
WM->Onscreenapp: VISIBLE("on_screen.app")

else display disable
rnote over Onscreenapp
do nothing
end rnote
end

== hide Onscreenapp ==
alt touch Onscreenapp's button
User->Onscreenapp: touch Onscreenapp's button
Onscreenapp->WM: deactivateWindow("on_screen.app")
Onscreenapp->Onscreenapp: unload qml
Onscreenapp->HSS: call replyShowWindow()
note right
{ "application_id": "app's id", 
  "parameter": {
    "method": "Buttons.ButtonPress", 
    "buttonName": "pressed button name", 
    "buttonPressMode": "Short"
 }
}
end note
WM->Onscreenapp: INVISIBLE("on_screen.app")
HSS->App: push replyShowWindow event
App->App: call button function

else hide by App

App->HSS: call hideWindow("onscreenapp")
note right
{ "application_id": "onscreenapp"}
end note
HSS->Onscreenapp: push hideWindow event
Onscreenapp->Onscreenapp: unload qml
Onscreenapp->WM: deactivateWindow("on_screen.app")
WM->Onscreenapp: INVISIBLE("on_screen.app")

end

@enduml