On Sat, 2002-01-19 at 18:04, Derek Atkins wrote: > Hi, > > In my work on the Entry Ledger, I've come across a problem. I'm > trying to write some code to determine _which_ cells changed. In > particular, I want to find out if a particular cell is the only cell > that changed within a particular cursor. Is there an easy way to do > that? > > I know that I could do this by running a loop over all my cells, by > name, and testing whether the cell changed by calling: > > gnc_table_layout_get_cell_changed (ledger->table->layout, cell_name, > TRUE)) > > However, that seems like a lot more work, IMHO. The cursor clearly > knows whether there were any changes[0]. > > Question: since the cells are actually numbered in the Cursor[1], > can't we provide a bitmask for all the cells that changed, and provide > a function that gives the bit position of a cell in a cursor based on > it's name? Then I could see if the bitmask is all negative in all > positions other than the one in question.
This exposes a lot of implementation detail just to answer a simple question, I think. > Another solution to my particular problem would be a function to > return the number (count) of changed cells. If the count != 1 then I > know that something else was changed other than the cell in question. This sounds much better. If we need something more general, returning a list of changed cells would work, too. dave
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