--- loncom/homework/caparesponse/caparesponse.pm	2003/06/24 20:41:56	1.105
+++ loncom/homework/caparesponse/caparesponse.pm	2003/10/23 19:36:02	1.107.2.4
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # caparesponse definition
 #
-# $Id: caparesponse.pm,v 1.105 2003/06/24 20:41:56 albertel Exp $
+# $Id: caparesponse.pm,v 1.107.2.4 2003/10/23 19:36:02 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -114,7 +114,6 @@ sub end_numericalresponse {
 	    if ( $response =~ /[^\s]/) {
 		my $ad;
 		my %previous = &Apache::response::check_for_previous($response,$partid,$id);
-		$Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
 		&Apache::lonxml::debug("submitted a $response<br>\n");
 		&Apache::lonxml::debug($$parstack[-1] . "\n<br>");
 		
@@ -131,6 +130,7 @@ sub end_numericalresponse {
 		    $response =~ s/\\/\\\\/g;
 		    $response =~ s/\'/\\\'/g;
 		}
+		$Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
 		&Apache::lonxml::debug("current $response");
 		my $expression="&caparesponse_check_list('".$response."','".
 		    $$parstack[-1];
@@ -169,10 +169,7 @@ sub end_numericalresponse {
 						     $safeeval);
 	my $award = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
 	my $status = $Apache::inputtags::status['-1'];
-	if (   ($award =~ /^correct/
-                && lc($Apache::lonhomework::problemstatus) ne 'no')
-             || $status eq "SHOW_ANSWER"
-             || $ENV{'form.texaward'} eq 'SHOW_ANSWER') {
+	if (  &Apache::response::show_answer() ) {
 	    my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,
 							 $safeeval);
 	    my $unit=&Apache::lonxml::get_param_var('unit',$parstack,
@@ -234,11 +231,16 @@ sub end_numericalresponse {
 		if ($$tagstack[-1] eq 'numericalresponse') {
 		    if ($unit=~/\S/) {$result.=' (in '.$unit.')<br /><br />';}
 		    $result.= '<table border="1"><tr>';
+		    my $previous=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.$id.submission"};
 		    for (my $ind=0;$ind<$number_of_bubbles;$ind++) {
+			my $checked='';
+			if ($previous eq $bubble_values[$ind]) {
+			    $checked=" checked='on' ";
+			}
 			$result.='<td><input type="radio" name="HWVAL_'.$id.
-			    '" value="'.$bubble_values[$ind].'"><b>'.
-				$alphabet[$ind].'</b>: '.
-				    $bubble_values[$ind].'</td>';
+			    '" value="'.$bubble_values[$ind].'" '.$checked
+			    .' /><b>'.$alphabet[$ind].'</b>: '.
+			    $bubble_values[$ind].'</td>';
 		    }
 		    $result.='</tr></table>';
 		} elsif ($$tagstack[-1] eq 'formularesponse') {
@@ -247,7 +249,7 @@ sub end_numericalresponse {
                            </textarea></font> <br /><br />';
 		}
 	    } elsif ($target eq 'tex') {
-		if (defined $unit and $Apache::lonhomework::type eq 'exam') {
+		if ((defined $unit) and ($unit=~/\S/) and ($Apache::lonhomework::type eq 'exam')) {
 		    $result.=' \textit{(in} \verb|'.$unit.'|\textit{)} ';
 		}
 		if ($$tagstack[-1] eq 'numericalresponse') {
@@ -324,7 +326,7 @@ sub end_numericalresponse {
 		if ($high && $$tagstack[-1] eq 'numericalresponse') { $ans.=' ['.$low.','.$high.']'; }
 		if ($sighigh && $$tagstack[-1] eq 'numericalresponse') {
 		    if ($ENV{'form.answer_output_mode'} eq 'tex') {
-			$ans.= " Sig \\textit{$siglow - $sighigh}";
+			$ans.= " Sig $siglow - $sighigh";
 		    } else {
 			$ans.= " Sig <i>$siglow - $sighigh</i>";
 		    }
@@ -343,7 +345,7 @@ sub end_numericalresponse {
 	    if ($target eq 'answer') {
 		if ($ENV{'form.answer_output_mode'} eq 'tex') {
 		    $result.=&Apache::response::answer_part($$tagstack[-1],
-							    "Unit: \\verb|$unit|");
+							    " Unit: $unit ");
 		} else {
 		    $result.=&Apache::response::answer_part($$tagstack[-1],
 							    "Unit: <b>$unit</b>");
@@ -443,6 +445,7 @@ sub format_number {
 
 sub make_numerical_bubbles {
     my ($number_of_bubbles,$target,$answer,$format) =@_;
+    my @oldseed=&Math::Random::random_get_seed();
     my @bubble_values = ();
     my @factors = (1.13,1.17,1.25,1.33,1.45); #default values of factors
     my @powers = (1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0); #default values for powers
@@ -457,6 +460,7 @@ sub make_numerical_bubbles {
 					       $format,$target);
 
     }
+    &Math::Random::random_set_seed(@oldseed);
     return @bubble_values;
 }