stateful_error.uml

@startuml

state "JustSubmitted" as JustSubmitted_valid
JustSubmitted_valid : State valid = True
JustSubmitted_valid : Error displayed = False
[*] -> JustSubmitted_valid

state "JustSubmitted" as JustSubmitted_invalid
JustSubmitted_invalid : State valid = False
JustSubmitted_invalid : Error displayed = False

state "DataChanged" as DataChanged_valid
DataChanged_valid : State valid = True
DataChanged_valid : Error displayed = False

state "DataChanged" as DataChanged_invalid
DataChanged_invalid : State valid = False
DataChanged_invalid : Error displayed = True

JustSubmitted_valid --> DataChanged_valid : User touched UI input elements,\nnew input valid
JustSubmitted_valid --> DataChanged_invalid : User touched UI input elements,\nnew input invalid
JustSubmitted_valid --> JustSubmitted_valid : User presses a "submit button"

JustSubmitted_invalid --> DataChanged_valid : User touched UI input elements,\nnew input valid
JustSubmitted_invalid --> DataChanged_invalid : User touched UI input elements,\nnew input invalid
JustSubmitted_invalid --> JustSubmitted_invalid : User presses a "submit button"

DataChanged_valid --> DataChanged_valid : User touched UI input elements,\nnew input valid
DataChanged_valid --> DataChanged_invalid : User touched UI input elements,\nnew input invalid
DataChanged_valid --> JustSubmitted_valid : User presses a "submit button",\nUI modifies input to a valid state
DataChanged_valid --> JustSubmitted_invalid : User presses a "submit button",\nUI modifies input to an invalid state

DataChanged_invalid --> DataChanged_valid : User touched UI input elements,\nnew input valid
DataChanged_invalid --> DataChanged_invalid : User touched UI input elements,\nnew input invalid
DataChanged_invalid --> DataChanged_invalid : User presses a "submit button"
@enduml