https://bugs.documentfoundation.org/show_bug.cgi?id=170637

            Bug ID: 170637
           Summary: FEATURE REQUEST: OnChange() formula for Calc
           Product: LibreOffice
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: medium
         Component: LibreOffice
          Assignee: [email protected]
          Reporter: [email protected]

Description:
I would like to see a function that allows cells in Calc to only be calculated
when the value or contents of another cell or range of cells is changed.  For
instance:

OnChange(A1,Now()) would only execute the Now() function when the value in A1
changes.  Other changes in the sheet would not prompt a recalculation of the
Now() function.  Similarly, OnChange(A:A,Sum(B3:B5)) would recalculate the sum
of cells B3 to B5 only when any value in column A is changed.

Actual Results:
Currently there is no formula that is only calculated when the value or content
of another cell or range of cells is changed.

Expected Results:
OnChange(A1,Now()) will display the time and date that the value of cell A1 was
changed, but will not update when the sheet is opened or when cell B1 is
updated.


Reproducible: Always


User Profile Reset: No

Additional Info:
One primary use case is for tracking changes and updates to worksheets, but
other uses can be found.

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