--- loncom/homework/radiobuttonresponse.pm	2007/03/27 19:20:49	1.113
+++ loncom/homework/radiobuttonresponse.pm	2007/10/08 09:22:50	1.128
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # mutliple choice style responses
 #
-# $Id: radiobuttonresponse.pm,v 1.113 2007/03/27 19:20:49 albertel Exp $
+# $Id: radiobuttonresponse.pm,v 1.128 2007/10/08 09:22:50 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -31,18 +31,36 @@ use strict;
 use HTML::Entities();
 use Apache::lonlocal;
 use Apache::lonnet;
+use Apache::response;
+
+my $default_bubbles_per_line = 10;
+
 
 BEGIN {
     &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));
 }
 
+sub bubble_line_count {
+    my ($numfoils, $bubbles_per_line) = @_;
+    my $bubble_lines;
+    $bubble_lines = int($numfoils / $bubbles_per_line);
+    if (($numfoils % $bubbles_per_line) != 0) {
+	$bubble_lines++;
+    }
+    return $bubble_lines;
+    
+}
+
+
 sub start_radiobuttonresponse {
     my ($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');
     my $id = &Apache::response::start_response($parstack,$safeeval);
+
     %Apache::hint::radiobutton=();
     undef(%Apache::response::foilnames);
     if ($target eq 'meta') {
@@ -136,22 +154,29 @@ sub storesurvey {
     return '';
 }
 
+
 sub grade_response {
-    my ($max,$randomize)=@_;
-    #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();
+	$response = &Apache::response::getresponse(1,undef,
+						   &bubble_line_count(scalar(@{ $whichfoils}),
+								      $bubbles_per_line),
+						   $bubbles_per_line);
+
     } else {
 	$response = $env{'form.HWVAL_'.$Apache::inputtags::response['-1']};
     }
+
+
     if ( $response !~ /[0-9]+/) { return; }
     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);
@@ -172,6 +197,16 @@ sub end_foilgroup {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 
     my $result;
+    my $bubble_lines;
+    my $bubbles_per_line;
+    my $answer_count;
+    my $id = $Apache::inputtags::response['-1'];
+    $bubbles_per_line = 
+	&Apache::response::get_response_param($Apache::inputtags::part."_$id",
+					      'numbubbles',
+					      $default_bubbles_per_line);
+
+
     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
 	$target eq 'tex' || $target eq 'analyze') {
 	my $style = $Apache::lonhomework::type;
@@ -180,42 +215,57 @@ sub end_foilgroup {
 	if ( $style eq 'survey'  && $target ne 'analyze') {
 	    if ($target eq 'web' || $target eq 'tex') {
 		$result=&displayallfoils($direction, $target);
-		if ($target eq 'web') {
-		    &setup_prior_tries_hash();
-		}
 	    } elsif ( $target eq 'answer' ) {
 		$result=&displayallanswers();
 	    } elsif ( $target eq 'grade' ) {
 		$result=&storesurvey();
 	    }
+	    $answer_count = scalar(@{$Apache::response::foilgroup{'names'}});
+
 	} else {
+
 	    my $name;
 	    my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,
 						 '-2');
 	    my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
 						       $safeeval,'-2');
+	    my ($answer, @shown) = &whichfoils($max, $randomize);
+	    $answer_count = scalar(@shown);
+
 	    if ($target eq 'web' || $target eq 'tex') {
-		$result=&displayfoils($target,$max,$randomize,$direction);
-		if ($target eq 'web') {
-		    &setup_prior_tries_hash();
-		}
+		$result=&displayfoils($target,
+				      $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,$randomize);
+		&grade_response($answer, \@shown, $bubbles_per_line);
 	    }  elsif ( $target eq 'analyze') {
-		my @shown = &whichfoils($max,$randomize);
+		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]";
 		push (@{ $Apache::lonhomework::analyze{"$part_id.options"} },
 		      ('true','false'));
+		push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} },
+		      $bubble_lines);
 	    }
 	}
 	$Apache::lonxml::post_evaluate=0;
     }
+    if ($target eq 'web') {
+	&Apache::response::setup_prior_tries_hash(\&format_prior_answer,
+						  [\%Apache::response::foilgroup]);
+    }
     &Apache::response::poprandomnumber();
-    &Apache::lonxml::increment_counter();
+    $bubble_lines = &bubble_line_count($answer_count, $bubbles_per_line);
+    &Apache::lonxml::increment_counter($bubble_lines,
+				       $id);
+    if ($target eq 'analyze') {
+	&Apache::lonhomework::set_bubble_lines();
+    }
     return $result;
 }
 
@@ -237,18 +287,14 @@ sub getfoilcounts {
     return ($truecnt,$falsecnt);
 }
 
-sub setup_prior_tries_hash {
-    my $part=$Apache::inputtags::part;
-    my $id=$Apache::inputtags::response[-1];	
-    foreach my $i (1..$Apache::lonhomework::history{'version'}) {
-	my $key = "$i:resource.$part.$id.submission";
-	next if (!exists($Apache::lonhomework::history{"$key"}));
-	my %response = 
-	    &Apache::lonnet::str2hash($Apache::lonhomework::history{$key});
-	my ($name) = keys(%response);
-	$Apache::inputtags::submission_display{$key} = 
-	    $Apache::response::foilgroup{$name.'.text'}
-    }
+sub format_prior_answer {
+    my ($mode,$answer,$other_data) = @_;
+    my $foil_data = $other_data->[0];
+    my %response = &Apache::lonnet::str2hash($answer);
+    my ($name)   = keys(%response);
+    return '<span class="LC_prior_radiobutton">'.
+	$foil_data->{$name.'.text'}.'</span>';
+
 }
 
 sub displayallfoils {
@@ -259,6 +305,7 @@ sub displayallfoils {
     if ( $Apache::response::foilgroup{'names'} ) {
 	@names= @{ $Apache::response::foilgroup{'names'} };
     }
+
     my $temp=0;
     my $i   =0;
     my $id=$Apache::inputtags::response['-1'];
@@ -328,10 +375,39 @@ sub displayallfoils {
 	    }
 	}
     }
+    
     if (($direction eq 'horizontal') && ($target ne 'tex')) { $result.='</tr></table>'; }
     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)=@_;
 
@@ -469,10 +545,9 @@ sub whichfoils {
 }
 
 sub displayfoils {
-    my ($target,$max,$randomize,$direction)=@_;
+    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') &&
@@ -482,7 +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>'; }
 	    }
@@ -514,6 +589,8 @@ sub displayfoils {
     } else {
 	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;
@@ -522,7 +599,7 @@ 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>"; 
@@ -541,8 +618,15 @@ sub displayfoils {
 		$result .= ' />'.$Apache::response::foilgroup{$name.'.text'}."</label>";
 	    } else {
 		if ($Apache::lonhomework::type eq 'exam') {
+		    if($bubble_number >= $bubbles_per_line) {
+			$line++;
+			$i = 0;
+			$bubble_number = 0;
+			$result.='\item[\textbf{'.($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'};
 		}
@@ -565,7 +649,6 @@ sub displayallanswers {
     if ( $Apache::response::foilgroup{'names'} ) {
 	@names= @{ $Apache::response::foilgroup{'names'} };
     }
-  
     my $result=&Apache::response::answer_header('radiobuttonresponse');
     foreach my $name (@names) {
 	$result.=&Apache::response::answer_part('radiobuttonresponse',
@@ -576,15 +659,20 @@ 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'});
     }