--- loncom/interface/spreadsheet/Spreadsheet.pm	2003/05/19 13:58:05	1.2
+++ loncom/interface/spreadsheet/Spreadsheet.pm	2003/05/22 21:16:35	1.3
@@ -1,5 +1,5 @@
 #
-# $Id: Spreadsheet.pm,v 1.2 2003/05/19 13:58:05 matthew Exp $
+# $Id: Spreadsheet.pm,v 1.3 2003/05/22 21:16:35 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -98,6 +98,10 @@ sub new {
         coursedesc => $ENV{'course.'.$ENV{'request.course.id'}.'.description'},
         coursefilename => $ENV{'request.course.fn'},
         #
+        # blackout is used to determine if any data needs to be hidden from the
+        # student.
+        blackout => 0,
+        #
         # Data storage
         formulas    => {},
         constants   => {},
@@ -1508,6 +1512,12 @@ sub othersheets {
     return @alternatives; 
 }
 
+sub blackout {
+    my $self = shift;
+    $self->{'blackout'} = $_[0] if (@_);
+    return $self->{'blackout'};
+}
+
 sub get_row {
     my $self = shift;
     my ($n)=@_;