#run when adding
'new_callback' => sub { my( $cgi, $object, $fields_listref ) = @_; },
+ #run before display to return a different value
+ 'value_callback' => sub { my( $columname, $value } ) = @_; },
+
#XXX describe
'field_callback' => sub { },
% #$field .= $fieldnum;
% $onchange .= "\nspawn_$field(what);";
% } else {
-% $curr_value = $object->$field();
+% $curr_value =
+% ($opt{'value_callback'} && $mode ne 'error')
+% ? &{ $opt{'value_callback'} }( $f->{'field'}, $object->$field() )
+% : $object->$field();
% }
%
% my @include = &{ $include_sub }(