--- loncom/homework/radiobuttonresponse.pm	2004/10/04 17:41:01	1.94
+++ loncom/homework/radiobuttonresponse.pm	2007/06/20 21:43:59	1.117
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # mutliple choice style responses
 #
-# $Id: radiobuttonresponse.pm,v 1.94 2004/10/04 17:41:01 matthew Exp $
+# $Id: radiobuttonresponse.pm,v 1.117 2007/06/20 21:43:59 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -30,6 +30,10 @@ package Apache::radiobuttonresponse;
 use strict;
 use HTML::Entities();
 use Apache::lonlocal;
+use Apache::lonnet;
+use Apache::response;
+
+my $bubbles_per_line = 10;
 
 BEGIN {
     &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));
@@ -38,6 +42,7 @@ BEGIN {
 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');
@@ -59,12 +64,14 @@ sub start_radiobuttonresponse {
 				    $token,'4').
 	    &Apache::edit::select_arg('Randomize Foil Order','randomize',
 				      ['yes','no'],$token).
+	    &Apache::edit::select_arg('Display Direction','direction',
+				      ['vertical','horizontal'],$token).
 				      &Apache::edit::end_row().
 				      &Apache::edit::start_spanning_row()."\n";
     } elsif ($target eq 'modified') {
 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
 						     $safeeval,'max',
-						     'randomize');
+						     'randomize','direction');
 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
     } elsif ($target eq 'tex') {
 	my $type=&Apache::lonxml::get_param('TeXtype',$parstack,$safeeval,
@@ -114,16 +121,21 @@ sub start_foilgroup {
 }
 
 sub storesurvey {
-    if ( !defined($ENV{'form.submitted'})) { return ''; }
-    my $response = $ENV{'form.HWVAL_'.$Apache::inputtags::response['-1']};
+    if ( !&Apache::response::submitted() ) { return ''; }
+    my $response = $env{'form.HWVAL_'.$Apache::inputtags::response['-1']};
     &Apache::lonxml::debug("Here I am!:$response:");
     if ( $response !~ /[0-9]+/) { return ''; }
+    my $part = $Apache::inputtags::part;
     my $id = $Apache::inputtags::response['-1'];
     my @whichfoils=@{ $Apache::response::foilgroup{'names'} };
     my %responsehash;
     $responsehash{$whichfoils[$response]}=$response;
-    $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=&Apache::lonnet::hash2str(%responsehash);
-    $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='SUBMITTED';
+    my $responsestr=&Apache::lonnet::hash2str(%responsehash);
+    $Apache::lonhomework::results{"resource.$part.$id.submission"}=
+	$responsestr;
+    my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
+    my $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='SUBMITTED';
+    &Apache::response::handle_previous(\%previous,$ad);
     &Apache::lonxml::debug("submitted a $response<br />\n");
     return '';
 }
@@ -132,12 +144,49 @@ sub grade_response {
     my ($max,$randomize)=@_;
     #keep the random numbers the same must always call this
     my ($answer,@whichfoils)=&whichfoils($max,$randomize);
-    if (!defined($ENV{'form.submitted'})) { return; }
+    if ( !&Apache::response::submitted() ) { return; }
     my $response;
-    if ($ENV{'form.submitted'} eq 'scantron') {
-	$response=&Apache::response::getresponse();
+    if ($env{'form.submitted'} eq 'scantron') {
+	# Need to know how many foils we have so that I know how many
+	# bubble lines to consume:
+
+	my $numfoils = scalar @whichfoils;
+	my $bubble_lines = int($numfoils / $bubbles_per_line);
+	if (($numfoils % $bubbles_per_line) != 0) {
+	    $bubble_lines++;	# Partial line of bubbles too.
+	}
+	# Get an array of the lines... note offsets seem to go from 1??...
+
+	my @responses;
+	for (my $i = 1; $i <= $bubble_lines; $i++) {
+	    my $this_line = &Apache::response::getresponse($i);
+	    push(@responses, $this_line);
+
+	}
+	#  Update the lonxml::counter so that the next problem
+	# Gets the right set of answers:
+
+	&Apache::lonxml::increment_counter($bubble_lines-1);
+
+	# This code assumes that unbubbled lines will be
+	# give empties. while bubbled lines nonblank.
+
+	my $answer_line;
+	my $answer_value = '';	# By default no answer given...
+	my $num_bubbled_lines=0;
+	for (my $line_number = 0; $line_number < $bubble_lines; $line_number++) {
+	    if ($responses[$line_number] ne "") {
+		$answer_line  = $line_number;
+		$answer_value = $responses[$line_number];
+		last;
+	    }
+	}
+	
+	$response = $answer_line * $bubbles_per_line + $answer_value;
+
+
     } else {
-	$response = $ENV{'form.HWVAL_'.$Apache::inputtags::response['-1']};
+	$response = $env{'form.HWVAL_'.$Apache::inputtags::response['-1']};
     }
     if ( $response !~ /[0-9]+/) { return; }
     my $part=$Apache::inputtags::part;
@@ -171,7 +220,7 @@ sub end_foilgroup {
 						   $safeeval,'-2');
 	if ( $style eq 'survey'  && $target ne 'analyze') {
 	    if ($target eq 'web' || $target eq 'tex') {
-		$result=&displayallfoils($direction);
+		$result=&displayallfoils($direction, $target);
 	    } elsif ( $target eq 'answer' ) {
 		$result=&displayallanswers();
 	    } elsif ( $target eq 'grade' ) {
@@ -198,7 +247,13 @@ sub end_foilgroup {
 		      ('true','false'));
 	    }
 	}
+	$Apache::lonxml::post_evaluate=0;
     }
+    if ($target eq 'web') {
+	&Apache::response::setup_prior_tries_hash(\&format_prior_answer,
+						  [\%Apache::response::foilgroup]);
+    }
+    
     &Apache::response::poprandomnumber();
     &Apache::lonxml::increment_counter();
     return $result;
@@ -222,12 +277,26 @@ sub getfoilcounts {
     return ($truecnt,$falsecnt);
 }
 
+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 {
-    my ($direction)=@_;
+    my ($direction, $target)=@_;
     my $result;
     &Apache::lonxml::debug("survey style display");
-    my @names = @{ $Apache::response::foilgroup{'names'} };
+    my @names;
+    if ( $Apache::response::foilgroup{'names'} ) {
+	@names= @{ $Apache::response::foilgroup{'names'} };
+    }
     my $temp=0;
+    my $i   =0;
     my $id=$Apache::inputtags::response['-1'];
     my $part=$Apache::inputtags::part;
     my $lastresponse=
@@ -237,19 +306,27 @@ sub displayallfoils {
     if (&Apache::response::show_answer() ) {
 	foreach my $name (@names) {
 	    if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {
-		if ($direction eq 'horizontal') {
+		if (($direction eq 'horizontal') && ($target ne 'tex')) {
 		    $result.="<td>";
 		} else {
-		    $result.="<br />";
+		    if ($target eq 'tex') {
+			$result .= '\item \vskip -2mm ';
+		    } else {
+			$result.="<br />";
+		    }
 		}
 		if (defined($lastresponse{$name})) {
-		    $result.='<b>';
+		    if ($target eq 'tex') {
+			$result .= '}';
+		    } else {
+			$result.='<b>';
+		    }
 		}
 		$result .= $Apache::response::foilgroup{$name.'.text'};
-		if (defined($lastresponse{$name})) {
+		if (defined($lastresponse{$name}) && ($target ne 'tex')) {
 		    $result.='</b>';
 		}
-		if ($direction eq 'horizontal') { $result.="</td>"; }
+		if (($direction eq 'horizontal') && ($target ne 'tex')) { $result.="</td>"; }
 	    }
 	}
     } else {
@@ -258,19 +335,36 @@ sub displayallfoils {
 		if ($direction eq 'horizontal') {
 		    $result.="<td>";
 		} else {
-		    $result.="<br />";
+		    if ($target eq 'tex') {
+			$result .= '\item \vskip -2mm ';
+		    } else {
+			$result.="<br />";
+		    }
+		}
+		if ($target eq 'tex') {
+		    $result .= '$\bigcirc$'.$Apache::response::foilgroup{$name.'.text'}.'\\\\';  #' stupid emacs
+		    $i++;
+		} else {
+		    $result .= '<label>';
+		    $result.="<input
+                       onchange=\"javascript:setSubmittedPart('$part');\"
+                       type=\"radio\"
+                       name=\"HWVAL_$Apache::inputtags::response['-1']\"
+                       value=\"$temp\" ";
+		    if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }
+		    $result .= ' />'.$Apache::response::foilgroup{$name.'.text'}.
+			'</label>';
 		}
-                $result .= '<label>';
-		$result.="<input type=\"radio\" name=\"HWVAL_$Apache::inputtags::response['-1']\" value=\"$temp\" ";
-		if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }
-		$result .= '>'.$Apache::response::foilgroup{$name.'.text'}.
-                    '</label>';
 		$temp++;
-		if ($direction eq 'horizontal') { $result.="</td>"; }
+		if ($target ne 'tex') {
+		    if (($direction eq 'horizontal') && ($target ne 'tex')) { $result.="</td>"; }
+		} else {
+		    $result.='\vskip 0 mm ';
+		}
 	    }
 	}
     }
-    if ($direction eq 'horizontal') { $result.='</tr></table>'; }
+    if (($direction eq 'horizontal') && ($target ne 'tex')) { $result.='</tr></table>'; }
     return $result;
 }
 
@@ -283,7 +377,7 @@ sub whichfoils {
     my ($truecnt,$falsecnt) = &getfoilcounts();
     my $count=0;
     # we will add in 1 of the true statements
-    if (($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; }
+    if ( $max>0 && ($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; $max=$count; }
     my $answer=int(&Math::Random::random_uniform() * ($count));
     &Apache::lonxml::debug("Count is $count, $answer is $answer");
     my @names;
@@ -307,6 +401,9 @@ sub whichfoils {
 		&Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>",'<>&"'));
 	    }
 	}
+	if (!$havetrue && $Apache::lonhomework::type ne 'survey') {
+	    &Apache::lonxml::error("There are no true statements available.<br />");
+	}
     } else {
 	my $current=0;
 	&Apache::lonhomework::showhash(%Apache::response::foilgroup);
@@ -453,6 +550,7 @@ sub displayfoils {
     } else {
 	my @alphabet = ('A'..'Z');
 	my $i = 0;
+	my $bubble_number = 0;
 	my $temp=0;  
 	my $id=$Apache::inputtags::response['-1'];
 	my $part=$Apache::inputtags::part;
@@ -471,13 +569,24 @@ sub displayfoils {
 	    }
 	    if ($target ne 'tex') { 
                 $result.= '<label>';
-		$result.="<input type=\"radio\" name=\"HWVAL_$Apache::inputtags::response['-1']\" value=\"$temp\" ";
+		$result.=
+		    "<input type=\"radio\"
+                            onchange=\"javascript:setSubmittedPart('$part');\"
+                            name=\"HWVAL_$Apache::inputtags::response['-1']\"
+                            value=\"$temp\" ";
 		if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }
-		$result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</label>";
+		$result .= ' />'.$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) {
+			$i = 0;
+			$bubble_number = 0;
+			&Apache::lonxml::increment_counter(1);
+			$result.='\item[\textbf{'.$Apache::lonxml::counter.'}.]';
+		    }
 		} else {
 		    $result .= '\vspace*{-2 mm}\item '.$Apache::response::foilgroup{$name.'.text'};
 		}
@@ -496,7 +605,10 @@ sub displayfoils {
 }
 
 sub displayallanswers {
-    my @names = @{ $Apache::response::foilgroup{'names'} };
+    my @names;
+    if ( $Apache::response::foilgroup{'names'} ) {
+	@names= @{ $Apache::response::foilgroup{'names'} };
+    }
   
     my $result=&Apache::response::answer_header('radiobuttonresponse');
     foreach my $name (@names) {
@@ -511,10 +623,15 @@ sub displayanswers {
     my ($max,$randomize)=@_;
     my ($answer,@whichopt) = &whichfoils($max,$randomize);
     my $result=&Apache::response::answer_header('radiobuttonresponse');
+    if ($Apache::lonhomework::type eq 'exam') {
+	my $correct = ('A'..'Z')[$answer];
+	$result.=&Apache::response::answer_part('radiobuttonresponse',
+						$correct);
+    }
     foreach my $name (@whichopt) {
 	$result.=&Apache::response::answer_part('radiobuttonresponse',
-						$Apache::response::foilgroup{$name.'.value'})
-	}
+						$Apache::response::foilgroup{$name.'.value'});
+    }
     $result.=&Apache::response::answer_footer('radiobuttonresponse');
     return $result;
 }
@@ -562,6 +679,9 @@ sub start_foil {
     my $result='';
     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
 	&Apache::lonxml::startredirection;
+	if ($target eq 'analyze') {
+	    &Apache::response::check_if_computed($token,$parstack,$safeeval,'value');
+	}
     } elsif ($target eq 'edit') {
 	$result=&Apache::edit::tag_start($target,$token);
 	$result.=&Apache::edit::text_arg('Name:','name',$token);
@@ -595,7 +715,10 @@ sub end_foil {
 	my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
 	if ($value ne 'unused') {
 	    my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
-	    if (!$name) { $name=$Apache::lonxml::curdepth; }
+	    if ($name eq "") {
+		&Apache::lonxml::warning("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));
 	    }