OnHistoryTime picture event

Declaration
 ENTRY OnHistoryTime(IN TIME _newTime)
 ; actions
 END OnHistoryTime
Parameters
_newTimeTime of the picture.
Description
The picture event is being generated by a change of the picture time in the History mode. There are the following examples:
  • the first entry into script after the picture was switched to History mode (OnHistoryBegin); data from archive exist there, time is set on begin of interval or it is set according to request from script that was sent after the history had been activated
  • change of history time
  • deactivating the History mode in the picture
The value of the parameter _newTime will be invalid for the third example (deactivating the History mode).
Example
 BOOL _blnHistory  ; variable that specifies whether the History mode is or is not activated
 TIME _historyTime ; current history time, if exists
 
 ENTRY OnHistoryTime(IN TIME _newTime)
   IF _newTime\VLD THEN
     IF ! _blnHistory THEN
       ; activating the History mode
       _blnHistory := @TRUE
     ENDIF
     ; history time
     _historyTime := _newTime
   ELSE   ; deactivating the History mode
   _blnHistory := @FALSE
   ENDIF
 END OnHistoryTime
 
 
 BEGIN
   _blnHistory := @FALSE
 ENDIF

Related pages:

Picture event handler
Picture events
%HI_GetHistoryTime function

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