--- loncom/homework/radiobuttonresponse.pm	2007/06/29 12:49:10	1.121
+++ loncom/homework/radiobuttonresponse.pm	2008/08/08 16:37:13	1.134
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # mutliple choice style responses
 #
-# $Id: radiobuttonresponse.pm,v 1.121 2007/06/29 12:49:10 foxr Exp $
+# $Id: radiobuttonresponse.pm,v 1.134 2008/08/08 16:37:13 bisitz Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -18,8 +18,7 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with LON-CAPA; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+# along with LON-CAPA; if not, write to the Free Software# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #
 # /home/httpd/html/adm/gpl.txt
 #
@@ -56,8 +55,6 @@ sub start_radiobuttonresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
 
-
-
     #when in a radiobutton response use these
     &Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
     push (@Apache::lonxml::namespace,'radiobuttonresponse');
@@ -106,6 +103,7 @@ sub start_radiobuttonresponse {
 	$result .= '\begin{enumerate}';
     } elsif ($target eq 'analyze') {
 	my $part_id="$Apache::inputtags::part.$id";
+        $Apache::lonhomework::analyze{"$part_id.type"} = 'radiobuttonresponse';
 	push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
     }
     return $result;
@@ -158,15 +156,14 @@ sub storesurvey {
 
 
 sub grade_response {
-    my ($max,$randomize, $bubbles_per_line)=@_;
-    #keep the random numbers the same must always call this
-    my ($answer,@whichfoils)=&whichfoils($max,$randomize);
+    my ($answer, $whichfoils, $bubbles_per_line)=@_;
+
     if ( !&Apache::response::submitted() ) { return; }
     my $response;
     
     if ($env{'form.submitted'} eq 'scantron') {
 	$response = &Apache::response::getresponse(1,undef,
-						   &bubble_line_count(scalar(@whichfoils),
+						   &bubble_line_count(scalar(@{ $whichfoils}),
 								      $bubbles_per_line),
 						   $bubbles_per_line);
 
@@ -179,7 +176,7 @@ sub grade_response {
     my $part=$Apache::inputtags::part;
     my $id = $Apache::inputtags::response['-1'];
     my %responsehash;
-    $responsehash{$whichfoils[$response]}=$response;
+    $responsehash{$whichfoils->[$response]}=$response;
     my $responsestr=&Apache::lonnet::hash2str(%responsehash);
     my %previous=&Apache::response::check_for_previous($responsestr,
 						       $part,$id);
@@ -203,7 +200,8 @@ sub end_foilgroup {
     my $bubble_lines;
     my $bubbles_per_line;
     my $answer_count;
-    my $id = $Apache::inputtags::response['-1'];
+    my $id   = $Apache::inputtags::response['-1'];
+    my $part = $Apache::inputtags::part;
     $bubbles_per_line = 
 	&Apache::response::get_response_param($Apache::inputtags::part."_$id",
 					      'numbubbles',
@@ -232,26 +230,27 @@ sub end_foilgroup {
 						 '-2');
 	    my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
 						       $safeeval,'-2');
-	    my @shown = &whichfoils($max,$randomize);
+	    my ($answer, @shown) = &whichfoils($max, $randomize);
 	    $answer_count = scalar(@shown);
 
 	    if ($target eq 'web' || $target eq 'tex') {
 		$result=&displayfoils($target,
-				      $max,
-				      $randomize,
+				      $answer, \@shown,
 				      $direction,
 				      $bubbles_per_line);
 	    } elsif ($target eq 'answer' ) {
-		$result=&displayanswers($max,$randomize);
+		$result=&displayanswers($answer, \@shown, $bubbles_per_line);
 	    } elsif ( $target eq 'grade') {
-		&grade_response($max,$randomize,
-                                $bubbles_per_line);
+		&grade_response($answer, \@shown, $bubbles_per_line);
 	    }  elsif ( $target eq 'analyze') {
+		my $bubble_lines = &bubble_line_count($answer_count, 
+						      $bubbles_per_line);
 		&Apache::response::analyze_store_foilgroup(\@shown,
 							   ['text','value','location']);
-		my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
+		my $part_id="$part.$id";
 		push (@{ $Apache::lonhomework::analyze{"$part_id.options"} },
 		      ('true','false'));
+
 	    }
 	}
 	$Apache::lonxml::post_evaluate=0;
@@ -260,9 +259,13 @@ sub end_foilgroup {
 	&Apache::response::setup_prior_tries_hash(\&format_prior_answer,
 						  [\%Apache::response::foilgroup]);
     }
-    $bubble_lines = &bubble_line_count($answer_count, $bubbles_per_line);
     &Apache::response::poprandomnumber();
-    &Apache::lonxml::increment_counter($bubble_lines);
+    $bubble_lines = &bubble_line_count($answer_count, $bubbles_per_line);
+    &Apache::lonxml::increment_counter($bubble_lines,
+				       "$part.$id");
+    if ($target eq 'analyze') {
+	&Apache::lonhomework::set_bubble_lines();
+    }
     return $result;
 }
 
@@ -299,7 +302,6 @@ sub displayallfoils {
     my $result;
     &Apache::lonxml::debug("survey style display");
     my @names;
-    &Apache::lonnet::loghthis("Display all foils");
     if ( $Apache::response::foilgroup{'names'} ) {
 	@names= @{ $Apache::response::foilgroup{'names'} };
     }
@@ -378,6 +380,34 @@ sub displayallfoils {
     return $result;
 }
 
+=pod
+
+=item &whichfoils($max,$randomize)
+
+Randomizes the list of foils.
+Respects
+  - each foils desire to be randomized
+  - the existance of Concept groups of foils (select 1 foil from each)
+  - and selects a single correct statement from all possilble true statments
+  - and limits it to a toal of $max foils
+
+WARNING: this routine uses the random number generator, it should only
+be called once per target, otherwise it can cause randomness changes in
+homework problems.
+
+Arguments
+  $max - maximum number of foils to select (including the true one)
+         (so a max of 5 is: 1 true, 4 false)
+
+  $randomize - whether to randomize the listing of foils, by default
+               will randomize, only if randomize is 'no' will it not
+
+Returns
+  $answer - location in the array of the correct answer
+  @foils  - array of foil names in to display order
+
+=cut
+
 sub whichfoils {
     my ($max,$randomize)=@_;
 
@@ -412,7 +442,7 @@ sub whichfoils {
 	    }
 	}
 	if (!$havetrue && $Apache::lonhomework::type ne 'survey') {
-	    &Apache::lonxml::error("There are no true statements available.<br />");
+	    &Apache::lonxml::error(&mt('There are no true statements available.').'<br />');
 	}
     } else {
 	my $current=0;
@@ -473,7 +503,7 @@ sub whichfoils {
 	my $dosplice=1;
 	if ($notrue && $Apache::lonhomework::type ne 'survey') {
 	    $dosplice=0;
-	    &Apache::lonxml::error("There are no true statements available.<br />");
+	    &Apache::lonxml::error(&mt('There are no true statements available.').'<br />');
 	}
 	#insert the true statement, keeping track of where it wants to be
 	if ($Apache::response::foilgroup{$truename.'.location'} eq 'top' && $dosplice) {
@@ -515,10 +545,9 @@ sub whichfoils {
 }
 
 sub displayfoils {
-    my ($target,$max,$randomize,$direction, $bubbles_per_line)=@_;
+    my ($target,$answer,$whichfoils,$direction, $bubbles_per_line)=@_;
     my $result;
 
-    my ($answer,@whichfoils)=&whichfoils($max,$randomize);
     my $part=$Apache::inputtags::part;
     my $solved=$Apache::lonhomework::history{"resource.$part.solved"};
     if ( ($target ne 'tex') &&
@@ -528,7 +557,7 @@ sub displayfoils {
 		$result.='<table><tr>';
 	    }
 	}
-	foreach my $name (@whichfoils) {
+	foreach my $name (@{ $whichfoils }) {
 	    if ($direction eq 'horizontal') {
 		if ($target ne 'tex') { $result.='<td>'; }
 	    }
@@ -538,9 +567,13 @@ sub displayfoils {
 		$result.='\item \vskip -2 mm  ';
 	    }
 	    if ($Apache::response::foilgroup{$name.'.value'} eq 'true') { 
-		if ($target ne 'tex') { $result.='Correct:<b>'; } else { $result.='Correct: \textbf{';}
+		if ($target ne 'tex') {
+                    $result.=&mt('Correct:').'<b>';
+                } else {
+                    $result.=&mt('Correct:').' \textbf{';
+                }
 	    } else {
-		$result.='Incorrect:';
+		$result.=&mt('Incorrect:');
 	    }
 	    if ($target eq 'web') { $result.="<label>"; }
 	    $result.=$Apache::response::foilgroup{$name.'.text'};
@@ -561,6 +594,7 @@ sub displayfoils {
 	my @alphabet = ('A'..'Z');
 	my $i = 0;
 	my $bubble_number = 0;
+	my $line = 0;
 	my $temp=0;  
 	my $id=$Apache::inputtags::response['-1'];
 	my $part=$Apache::inputtags::part;
@@ -569,7 +603,7 @@ sub displayfoils {
 	if ($target ne 'tex' && $direction eq 'horizontal') {
 	    $result.="<table><tr>";
 	}
-	foreach my $name (@whichfoils) {
+	foreach my $name (@{ $whichfoils }) {
 	    if ($target ne 'tex') {
 		if ($direction eq 'horizontal') {
 		    $result.="<td>"; 
@@ -588,14 +622,15 @@ sub displayfoils {
 		$result .= ' />'.$Apache::response::foilgroup{$name.'.text'}."</label>";
 	    } else {
 		if ($Apache::lonhomework::type eq 'exam') {
-		    $result .= '{\small \textbf{'.$alphabet[$i].'}}$\bigcirc$'.$Apache::response::foilgroup{$name.'.text'}.'\\\\';  #' stupid emacs
-		    $i++;
-		    $bubble_number++;
 		    if($bubble_number >= $bubbles_per_line) {
+			$line++;
 			$i = 0;
 			$bubble_number = 0;
-			$result.='\item[\textbf{'.$Apache::lonxml::counter.'}.]';
+			$result.='\item[\textbf{'.($Apache::lonxml::counter+$line).'}.]';
 		    }
+		    $result .= '{\small \textbf{'.$alphabet[$i].'}}$\bigcirc$'.$Apache::response::foilgroup{$name.'.text'}.'\\\\';  #' stupid emacs
+		    $i++;
+		    $bubble_number++;
 		} else {
 		    $result .= '\vspace*{-2 mm}\item '.$Apache::response::foilgroup{$name.'.text'};
 		}
@@ -628,15 +663,20 @@ sub displayallanswers {
 }
 
 sub displayanswers {
-    my ($max,$randomize)=@_;
-    my ($answer,@whichopt) = &whichfoils($max,$randomize);
-    my $result=&Apache::response::answer_header('radiobuttonresponse');
+    my ($answer, $whichopt, $bubbles_per_line)=@_;
+    my $result;
+
     if ($Apache::lonhomework::type eq 'exam') {
-	my $correct = ('A'..'Z')[$answer];
-	$result.=&Apache::response::answer_part('radiobuttonresponse',
-						$correct);
+	my $line = int($answer/$bubbles_per_line);
+	my $correct = ('A'..'Z')[$answer%$bubbles_per_line];
+	$result .= &Apache::response::answer_header('radiobuttonresponse',
+						    $line);
+	$result .= &Apache::response::answer_part('radiobuttonresponse',
+						  $correct);
+    } else {
+	$result .= &Apache::response::answer_header('radiobuttonresponse');
     }
-    foreach my $name (@whichopt) {
+    foreach my $name (@{ $whichopt }) {
 	$result.=&Apache::response::answer_part('radiobuttonresponse',
 						$Apache::response::foilgroup{$name.'.value'});
     }
@@ -724,11 +764,11 @@ sub end_foil {
 	if ($value ne 'unused') {
 	    my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
 	    if ($name eq "") {
-		&Apache::lonxml::warning("Foils without names exist. This can cause problems to malfunction.");
+		&Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
 		$name=$Apache::lonxml::curdepth;
 	    }
 	    if (defined($Apache::response::foilnames{$name})) {
-		&Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
+		&Apache::lonxml::error(&mt('Foil name [_1] appears more than once. Foil names need to be unique.','<b><tt>'.$name.'</tt></b>'));
 	    }
 	    $Apache::response::foilnames{$name}++;
 	    my $location =&Apache::lonxml::get_param('location',$parstack,