@startuml MainTreatmentScreenTimer

    participant TD                  as TD
    participant SW                  as SW
    participant UI                  as UI
    actor       USER                as US

    'Possible actions and interaction types
    ' TD -> SW: MSG: Message
    ' SW -> UI: CMD: command
    ' UI -> UI: ACT: Action
    ' US -> UI: User actions are:
    '   ENT: User enters a value or string
    '   TCH: User touches a button (RadioButton, CheckBox, ...)
    '   SET: User sets/slides a slider
    '   SCL: User scrolls a flipable area
    '
    'Messages conventions:
    '[x<hex message ID> <Req/Rsp/Dat>  \n  <P1>,<P..>]
    '[x<hex message ID> <Req/Rsp/Dat>  \n  <P1>,# certain amount of parameters according to the content]
    '[x<hex message ID> <Req/Rsp/Dat>  \n  <P1>,X The rest of the parameters do not matter.]

    == Main Treatment Screen TImer ==
    TD -> SW: MSG: [x3B: #3] \nTD Treatment Time Data:  \
                        \n\t(U32) txDurSecs             \
                        \n\t(U32) txElapsedSec          \
                        \n\t(U32) txRemainingSecs
    SW -> UI: CMD: Update Treatment Time (VTreatmentTime):  \
                        \n\ttime_Total                      \
                        \n\ttime_Elapsed                    \
                        \n\ttime_Remaining
    US -> UI: TCH: Edit Button
    UI -> UI: ACT: Treatment Adjustment Duration Popup

    TD -> SW: MSG: [x3C: #10] \nTD Treatment States:    \
                        \n\t(U32) mSubMode              \
                        \n\t(U32) mBloodPrimeState      \
                        \n\t(U32) mDialysateState       \
                        \n\t(U32) mIsolatedUFState      \
                        \n\t(U32) mTreatmentStopState   \
                        \n\t(U32) mRinsebackState       \
                        \n\t(U32) mRecirculateState     \
                        \n\t(U32) mTreatmentEndState    \
                        \n\t(U32) mSalineState          \
                        \n\t(U32) mHeparinState
    SW -> UI: CMD: Paued State (VTDTreatmentStates):\nTREATMENT_PAUSED_STATE (txStop)
    UI -> UI: ACT: Visual Indication Treatment is Paused:       \
                        \n\tNotification on Timer               \
                        \n\tFade in/out effect of timer progress
@enduml