OnHistoryTime picture event

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

Strom stránky

OnHistoryTime picture event

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