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Diff for /loncom/homework/radiobuttonresponse.pm between versions 1.67 and 1.153.6.6

version 1.67, 2003/04/07 22:28:08 version 1.153.6.6, 2012/01/25 11:37:32
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 # GNU General Public License for more details.  # GNU General Public License for more details.
 #  #
 # You should have received a copy of the GNU General Public License  # You should have received a copy of the GNU General Public License
 # along with LON-CAPA; if not, write to the Free Software  # along with LON-CAPA; if not, write to the Free Software# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  
 #  #
 # /home/httpd/html/adm/gpl.txt  # /home/httpd/html/adm/gpl.txt
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
 # 2/21 Guy  
   
 package Apache::radiobuttonresponse;  package Apache::radiobuttonresponse;
 use strict;  use strict;
 use HTML::Entities();  use HTML::Entities();
   use Apache::lonlocal;
   use Apache::lonnet;
   use Apache::response;
   use Apache::caparesponse;
   
   my $default_bubbles_per_line = 10;
   my @alphabet      = ( 'A' .. 'Z' ); # Foil labels.
   
   
   
 BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));      &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 {  sub start_radiobuttonresponse {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
   my $result;        @_;
   #when in a radiobutton response use these      my $result;
   &Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));  
   push (@Apache::lonxml::namespace,'radiobuttonresponse');      #when in a radiobutton response use these
   my $id = &Apache::response::start_response($parstack,$safeeval);      &Apache::lonxml::register( 'Apache::radiobuttonresponse',
   %Apache::hint::radiobutton=();          ( 'foilgroup', 'foil', 'conceptgroup' ) );
   if ($target eq 'meta') {      push( @Apache::lonxml::namespace, 'radiobuttonresponse' );
     $result=&Apache::response::meta_package_write('radiobuttonresponse');      my $id = &Apache::response::start_response( $parstack, $safeeval );
   } elsif ($target eq 'edit' ) {  
     $result.=&Apache::edit::start_table($token).      %Apache::hint::radiobutton = ();
  '<tr><td>'.&Apache::lonxml::description($token)."</td><td>Delete:".      undef(%Apache::response::foilnames);
  &Apache::edit::deletelist($target,$token)      if ( $target eq 'meta' ) {
  ."</td><td>&nbsp".&Apache::edit::end_row()          $result = &Apache::response::meta_package_write('radiobuttonresponse');
         .&Apache::edit::start_spanning_row();      }
       elsif ( $target eq 'edit' ) {
     $result.=          $result .=
  &Apache::edit::text_arg('Max Number Of Shown Foils:','max',$token,'4').              &Apache::edit::start_table($token)
  &Apache::edit::select_arg('Randomize Foil Order','randomize',            . '<tr><td>'
   ['yes','no'],$token).            . &Apache::lonxml::description($token)
         &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n";            . &Apache::loncommon::help_open_topic('Radio_Response_Problems')
   } elsif ($target eq 'modified') {            . '</td>'
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,            . '<td><span class="LC_nobreak">'
  $safeeval,'max','randomize');            . &mt('Delete?') . ' '
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }            . &Apache::edit::deletelist( $target, $token )
   } elsif ($target eq 'tex') {            . '</span></td>'
       $result .= '\begin{enumerate}';            . '<td>&nbsp;'
   }            . &Apache::edit::end_row()
   return $result;            . &Apache::edit::start_spanning_row();
           $result .= &Apache::edit::text_arg( 'Max Number Of Shown Foils:',
               'max', $token, '4' )
             . '&nbsp;' x 3
             . &Apache::edit::select_arg( 'Randomize Foil Order:',
               'randomize', [ 'yes', 'no' ], $token )
             . '&nbsp;' x 3
             . &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, $safeeval, 'max',
               'randomize', 'direction' );
           if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       }
       elsif ( $target eq 'tex' ) {
           my $type =
             &Apache::lonxml::get_param( 'TeXtype', $parstack, $safeeval, undef,
               0 );
           if ( $type eq '1' ) {
               $result .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}';
           }
           elsif ( $type eq 'A' ) {
               $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
           }
           elsif ( $type eq 'a' ) {
               $result .= ' \renewcommand{\labelenumi}{\alph{enumi}.}';
           }
           elsif ( $type eq 'i' ) {
               $result .= ' \renewcommand{\labelenumi}{\roman{enumi}.}';
           }
           else {
               $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
           }
   
       }
       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;
 }  }
   
 sub end_radiobuttonresponse {  sub end_radiobuttonresponse {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
   my $result;        @_;
   if ($target eq 'edit') { $result=&Apache::edit::end_table(); }      my $result;
   if ($target eq 'tex') { $result .= '\end{enumerate}'; }      if ( $target eq 'edit' ) { $result = &Apache::edit::end_table(); }
   &Apache::response::end_response;  
   pop @Apache::lonxml::namespace;      &Apache::response::end_response;
   &Apache::lonxml::deregister('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));      pop @Apache::lonxml::namespace;
   return $result;      &Apache::lonxml::deregister( 'Apache::radiobuttonresponse',
           ( 'foilgroup', 'foil', 'conceptgroup' ) );
       undef(%Apache::response::foilnames);
       return $result;
 }  }
   
 %Apache::response::foilgroup=();  %Apache::response::foilgroup = ();
   
 sub start_foilgroup {  sub start_foilgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
   my $result;        @_;
   %Apache::response::foilgroup=();      %Apache::response::foilgroup               = ();
   $Apache::radiobuttonresponse::conceptgroup=0;      $Apache::radiobuttonresponse::conceptgroup = 0;
   &Apache::response::setrandomnumber();      &Apache::response::pushrandomnumber( undef, $target );
   if ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') {      return;
       $result.='\item[\textbf{'.$Apache::lonxml::counter.'}.]';  
   }  
   return $result;  
 }  }
   
 sub storesurvey {  sub storesurvey {
   if ( !defined($ENV{'form.submitted'})) { return ''; }      my ($style) = @_;
   my $response = $ENV{'form.HWVAL'.$Apache::inputtags::response['-1']};      if ( !&Apache::response::submitted() ) { return ''; }
   &Apache::lonxml::debug("Here I am!:$response:");      my $response = $env{ 'form.HWVAL_' . $Apache::inputtags::response['-1'] };
   if ( $response !~ /[0-9]+/) { return ''; }      &Apache::lonxml::debug("Here I am!:$response:");
   my $id = $Apache::inputtags::response['-1'];      if ( $response !~ /[0-9]+/ ) { return ''; }
   my @whichfoils=@{ $Apache::response::foilgroup{'names'} };      my $part       = $Apache::inputtags::part;
   my %responsehash;      my $id         = $Apache::inputtags::response['-1'];
   $responsehash{$whichfoils[$response]}=$response;      my @whichfoils = @{ $Apache::response::foilgroup{'names'} };
   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=&Apache::lonnet::hash2str(%responsehash);      my %responsehash;
   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='SUBMITTED';      $responsehash{ $whichfoils[$response] } = $response;
   &Apache::lonxml::debug("submitted a $response<br />\n");      my $responsestr = &Apache::lonnet::hash2str(%responsehash);
   return '';      $Apache::lonhomework::results{"resource.$part.$id.submission"} =
         $responsestr;
       my %previous =
         &Apache::response::check_for_previous( $responsestr, $part, $id );
       my $ad;
   
       if ( $style eq 'anonsurvey' ) {
           $ad = $Apache::lonhomework::results{"resource.$part.$id.awarddetail"} =
             'ANONYMOUS';
       }
       elsif ( $style eq 'anonsurveycred' ) {
           $ad = $Apache::lonhomework::results{"resource.$part.$id.awarddetail"} =
             'ANONYMOUS_CREDIT';
       }
       elsif ( $style eq 'surveycred' ) {
           $ad = $Apache::lonhomework::results{"resource.$part.$id.awarddetail"} =
             'SUBMITTED_CREDIT';
       }
       else {
           $ad = $Apache::lonhomework::results{"resource.$part.$id.awarddetail"} =
             'SUBMITTED';
       }
       &Apache::response::handle_previous( \%previous, $ad );
       &Apache::lonxml::debug("submitted a $response<br />\n");
       return '';
 }  }
   
 sub grade_response {  sub grade_response {
   my ($max,$randomize)=@_;      my ( $answer, $whichfoils, $bubbles_per_line ) = @_;
   #keep the random numbers the same must always call this  
   my ($answer,@whichfoils)=&whichfoils($max,$randomize);      if ( !&Apache::response::submitted() ) { return; }
   if (!defined($ENV{'form.submitted'})) { return; }      my $response;
   my $response;  
   if ($ENV{'form.submitted'} eq 'scantron') {      if ( $env{'form.submitted'} eq 'scantron' ) {
       my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,          $response =
       'H'=>7,'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,            &Apache::response::getresponse( 1, undef,
       'O'=>14,'P'=>15,'Q'=>16,'R'=>17,'S'=>18,'T'=>19,'U'=>20,              &bubble_line_count( scalar( @{$whichfoils} ), $bubbles_per_line ),
       'V'=>21,'W'=>22,'X'=>23,'Y'=>24,'Z'=>25);              $bubbles_per_line );
       $response = $ENV{'scantron.'.$Apache::lonxml::counter.'.answer'};  
       $response = $let_to_num{$response};      }
   } else {      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;      if ( $response !~ /[0-9]+/ ) { return; }
   my $id = $Apache::inputtags::response['-1'];      my $part = $Apache::inputtags::part;
   my %responsehash;      my $id   = $Apache::inputtags::response['-1'];
   $responsehash{$whichfoils[$response]}=$response;      my %responsehash;
   my $responsestr=&Apache::lonnet::hash2str(%responsehash);      $responsehash{ $whichfoils->[$response] } = $response;
   my %previous=&Apache::response::check_for_previous($responsestr,      my $responsestr = &Apache::lonnet::hash2str(%responsehash);
      $part,$id);      my %previous =
   $Apache::lonhomework::results{"resource.$part.$id.submission"}=        &Apache::response::check_for_previous( $responsestr, $part, $id );
     $responsestr;      $Apache::lonhomework::results{"resource.$part.$id.submission"} =
   &Apache::lonxml::debug("submitted a $response<br />\n");        $responsestr;
   my $ad;      &Apache::lonxml::debug("submitted a $response<br />\n");
   if ($response == $answer) {      my $ad;
     $ad='EXACT_ANS';  
   } else {      if ( $response == $answer ) {
     $ad='INCORRECT';          $ad = 'EXACT_ANS';
   }      }
   $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;      else {
   &Apache::response::handle_previous(\%previous,$ad);          $ad = 'INCORRECT';
       }
       $Apache::lonhomework::results{"resource.$part.$id.awarddetail"} = $ad;
       &Apache::response::handle_previous( \%previous, $ad );
 }  }
   
 sub end_foilgroup {  sub end_foilgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
         @_;
   
   my $result;      my $result;
   if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex') {      my $bubble_lines;
     my $style = $Apache::lonhomework::type;      my $answer_count;
     if ( $style eq 'survey' ) {      my $id               = $Apache::inputtags::response['-1'];
       if ($target eq 'web' || $target eq 'answer' || $target eq 'tex') {      my $part             = $Apache::inputtags::part;
  $result=&displayallfoils();      my $bubbles_per_line = &getbubblesnum( $part, $id );
       } elsif ( $target eq 'grade' ) {  
  $result=&storesurvey();      if (   $target eq 'grade'
       }          || $target eq 'web'
     } else {          || $target eq 'answer'
       my $name;          || $target eq 'tex'
       my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');          || $target eq 'analyze' )
       my $randomize = &Apache::lonxml::get_param('randomize',$parstack,      {
  $safeeval,'-2');          my $style = $Apache::lonhomework::type;
       if ($target eq 'web' || $target eq 'tex') {          my $direction =
  $result=&displayfoils($target,$max,$randomize);            &Apache::lonxml::get_param( 'direction', $parstack, $safeeval, '-2' );
       } elsif ($target eq 'answer' ) {          if (
  $result=&displayanswers($max,$randomize);              (
       } elsif ( $target eq 'grade') {                     ( $style eq 'survey' )
  &grade_response($max,$randomize);                  || ( $style eq 'surveycred' )
       }                  || ( $style eq 'anonsurvey' )
     }                  || ( $style eq 'anonsurveycred' )
   }              )
   &Apache::lonxml::increment_counter();              && ( $target ne 'analyze' )
   return $result;            )
           {
               if ( $target eq 'web' || $target eq 'tex' ) {
                   $result = &displayallfoils( $direction, $target );
               }
               elsif ( $target eq 'answer' ) {
                   $result = &displayallanswers();
               }
               elsif ( $target eq 'grade' ) {
                   $result = &storesurvey($style);
               }
               $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, $answer, \@shown, $direction,
                       $bubbles_per_line );
               }
               elsif ( $target eq 'answer' ) {
                   $result =
                     &displayanswers( $answer, \@shown, $bubbles_per_line );
               }
               elsif ( $target eq 'grade' ) {
                   &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 $part_id = "$part.$id";
                   push(
                       @{ $Apache::lonhomework::analyze{"$part_id.options"} },
                       ( '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();
       $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;
   }
   
   sub getbubblesnum {
       my ( $part, $id ) = @_;
       my $bubbles_per_line;
       my $default_numbubbles = $default_bubbles_per_line;
       if (   ( $env{'form.bubbles_per_row'} =~ /^\d+$/ )
           && ( $env{'form.bubbles_per_row'} > 0 ) )
       {
           $default_numbubbles = $env{'form.bubbles_per_row'};
       }
       $bubbles_per_line = &Apache::response::get_response_param( $part . "_$id",
           'numbubbles', $default_numbubbles );
       return $bubbles_per_line;
 }  }
   
 sub getfoilcounts {  sub getfoilcounts {
   my @names;      my @names;
   my $truecnt=0;      my $truecnt  = 0;
   my $falsecnt=0;      my $falsecnt = 0;
   my $name;      my $name;
   if ( $Apache::response::foilgroup{'names'} ) {      if ( $Apache::response::foilgroup{'names'} ) {
     @names= @{ $Apache::response::foilgroup{'names'} };          @names = @{ $Apache::response::foilgroup{'names'} };
   }  
   foreach $name (@names) {  
     if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {  
       $truecnt++;  
     } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {  
       $falsecnt++;  
     }  
   }  
   return ($truecnt,$falsecnt);  
 }  
   
 sub displayallfoils {  
   my $result;  
   &Apache::lonxml::debug("survey style display");  
   my @names = @{ $Apache::response::foilgroup{'names'} };  
   my $temp=0;  
   my $id=$Apache::inputtags::response['-1'];  
   my $part=$Apache::inputtags::part;  
   my $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};  
   my %lastresponse=&Apache::lonnet::str2hash($lastresponse);  
   if (($Apache::lonhomework::history{"resource.$part.solved"} =~ /^correct/)  || ($Apache::inputtags::status[-1] eq  'SHOW_ANSWER')) {  
     foreach my $name (@names) {  
       if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {  
  $result.="<br />".$Apache::response::foilgroup{$name.'.value'};  
  if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {  
   $result.='<b>';  
  }  
  $result .= $Apache::response::foilgroup{$name.'.text'};  
  if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {  
   $result.='</b>';  
  }  
       }  
     }      }
   } else {      foreach $name (@names) {
     foreach my $name (@names) {          if ( $Apache::response::foilgroup{ $name . '.value' } eq 'true' ) {
       if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {              $truecnt++;
  $result.="<br /><input type=\"radio\" name=\"HWVAL$Apache::inputtags::response['-1']\" value=\"$temp\" ";          }
  if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }          elsif ( $Apache::response::foilgroup{ $name . '.value' } eq 'false' ) {
  $result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</input>\n";              $falsecnt++;
  $temp++;          }
       }  
     }      }
   }      return ( $truecnt, $falsecnt );
   return $result;  }
   
   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, $target ) = @_;
       my $result;
       &Apache::lonxml::debug("survey style display");
       my @names;
       if ( $Apache::response::foilgroup{'names'} ) {
           @names = @{ $Apache::response::foilgroup{'names'} };
       }
   
       # Figure out how to bracket the list of foils for
       # the TeX target:
       #
   
       my $begin_environment;
       my $end_environment;
       
       if ($target eq 'tex') {
   
    # Decide how to bracket the list of foils:
   
   
           if (   $env{'form.pdfFormFields'} eq 'yes'
               && $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
           {
               $begin_environment = '\begin{itemize}';
       $end_environment   = '\end{itemize}';
           }
           else {
               $begin_environment = '\begin{enumerate}';
       $end_environment   = '\end{enumerate}';
           }
    $result .= $begin_environment;
       }
   
       my $temp = 0;
       my $i    = 0;
       my $id   = $Apache::inputtags::response['-1'];
       my $part = $Apache::inputtags::part;
       my ( $lastresponse, $newvariation, $showanswer );
       if (
           (
               (
                   $Apache::lonhomework::history{"resource.$part.type"} eq
                   'randomizetry'
               )
               || ( $Apache::lonhomework::type eq 'randomizetry' )
           )
           && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
         )
       {
           if ( $env{ 'form.' . $part . '.rndseed' } ne
               $Apache::lonhomework::history{"resource.$part.rndseed"} )
           {
               $newvariation = 1;
           }
       }
       $showanswer = &Apache::response::show_answer();
       unless (
           (
               (
                   $Apache::lonhomework::history{"resource.$part.type"} eq
                   'anonsurvey'
               )
               || ( $Apache::lonhomework::history{"resource.$part.type"} eq
                   'anonsurveycred' )
           )
           && ( defined( $env{'form.grade_symb'} ) )
           || ( $newvariation && !$showanswer )
         )
       {
           $lastresponse =
             $Apache::lonhomework::history{"resource.$part.$id.submission"};
       }
       if ( $direction eq 'horizontal' ) { $result .= '<table><tr>'; }
       my %lastresponse = &Apache::lonnet::str2hash($lastresponse);
       if ($showanswer) {
           foreach my $name (@names) {
               if ( $Apache::response::foilgroup{ $name . '.value' } ne 'unused' )
               {
                   if ( ( $direction eq 'horizontal' ) && ( $target ne 'tex' ) ) {
                       $result .= "<td>";
                   }
                   else {
                       if ( $target eq 'tex' ) {
                           $result .= '\item \vskip -2mm ';
                       }
                       else {
                           $result .= "<br />";
                       }
                   }
                   if ( defined( $lastresponse{$name} ) ) {
                       if ( $target eq 'tex' ) {
                           $result .= '}';
                       }
                       else {
                           $result .= '<b>';
                       }
                   }
                   $result .= $Apache::response::foilgroup{ $name . '.text' };
                   if ( defined( $lastresponse{$name} ) && ( $target ne 'tex' ) ) {
                       $result .= '</b>';
                   }
                   if ( ( $direction eq 'horizontal' ) && ( $target ne 'tex' ) ) {
                       $result .= "</td>";
                   }
               }
           }
       }
       else {
           foreach my $name (@names) {
               if ( $Apache::response::foilgroup{ $name . '.value' } ne 'unused' )
               {
                   if ( $direction eq 'horizontal' ) {
                       $result .= "<td>";
                   }
                   else {
                       if ( $target eq 'tex' ) {
                           if (   $env{'form.pdfFormFields'} eq 'yes'
                               && $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
                           {
                               my $fieldname =
                                   $env{'request.symb'} 
                                 . '&part_'
                                 . $Apache::inputtags::part
                                 . '&radiobuttonresponse'
                                 . '&HWVAL_'
                                 . $Apache::inputtags::response['-1'];
                               $result .= '\item[{'
                                 . &Apache::lonxml::print_pdf_radiobutton(
                                   $fieldname, $temp )
                                 . '}]'
                                 . $Apache::response::foilgroup{ $name . '.text' }
                                 . "\n";
                           }
                           else {
                               $result .= '\item \vskip -2mm ';
                           }
                       }
                       else {
                           $result .= "<br />";
                       }
                   }
                   if ( $target eq 'tex' ) {
                       if (   $env{'form.pdfFormFields'} ne 'yes'
                           or $Apache::inputtags::status[-1] ne 'CAN_ANSWER' )
                       {
                           $result .=
                               '$\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="checked"';
                       }
                       $result .= ' />'
                         . $Apache::response::foilgroup{ $name . '.text' }
                         . '</label>';
                   }
                   $temp++;
                   if ( $target ne 'tex' ) {
                       if (   ( $direction eq 'horizontal' )
                           && ( $target ne 'tex' ) )
                       {
                           $result .= "</td>";
                       }
                   }
                   else {
                       $result .= '\vskip 0 mm ';
                   }
               }
           }
       }
   
       if ( ( $direction eq 'horizontal' ) && ( $target ne 'tex' ) ) {
           $result .= '</tr></table>';
       }
   
       # Close tex bracketing:
   
       if ($target eq 'tex') {
    $result .= $end_environment;
       }
       return $result;
   }
   
   
   
 sub whichfoils {  sub whichfoils {
   my ($max,$randomize)=@_;      my ( $max, $randomize ) = @_;
   
   my @truelist;      my @truelist;
   my @falselist;      my @falselist;
   my @whichfalse =();      my @whichfalse = ();
   my ($truecnt,$falsecnt) = &getfoilcounts();      my ( $truecnt, $falsecnt ) = &getfoilcounts();
   my $count=0;      my $count = 0;
   # we will add in 1 of the true statements  
   if (($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; }      # we will add in 1 of the true statements
   my $answer=int(&Math::Random::random_uniform() * ($count));      if ( $max > 0 && ( $falsecnt + 1 ) > $max ) { $count = $max }
   &Apache::lonxml::debug("Count is $count, $answer is $answer");      else { $count = $falsecnt + 1; $max = $count; }
   my @names;      my $answer = int( &Math::Random::random_uniform() * ($count) );
   if ( $Apache::response::foilgroup{'names'} ) {      &Apache::lonxml::debug("Count is $count, $answer is $answer");
       @names= @{ $Apache::response::foilgroup{'names'} };      my @names;
   }      if ( $Apache::response::foilgroup{'names'} ) {
   if (&Apache::response::showallfoils()) {          @names = @{ $Apache::response::foilgroup{'names'} };
       @whichfalse=@names;      }
   } elsif ($randomize eq 'no') {      if ( &Apache::response::showallfoils() ) {
       &Apache::lonxml::debug("No randomization");          @whichfalse = @names;
       my $havetrue=0;      }
       foreach my $name (@names) {      elsif ( $randomize eq 'no' ) {
   if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {          &Apache::lonxml::debug("No randomization");
       if (!$havetrue ) {          my $havetrue = 0;
   push(@whichfalse,$name); $havetrue++; $answer=$#whichfalse;          foreach my $name (@names) {
       }              if ( $Apache::response::foilgroup{ $name . '.value' } eq 'true' ) {
   } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {                  if ( !$havetrue ) {
       push (@whichfalse,$name);                      push( @whichfalse, $name );
   } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {                      $havetrue++;
   } else {                      $answer = $#whichfalse;
       &Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>"));                  }
   }              }
       }              elsif (
   } else {                  $Apache::response::foilgroup{ $name . '.value' } eq 'false' )
     my $current=0;              {
     &Apache::lonhomework::showhash(%Apache::response::foilgroup);                  push( @whichfalse, $name );
     my (%top,%bottom);              }
     #first find out where everyone wants to be              elsif (
     foreach my $name (@names) {                  $Apache::response::foilgroup{ $name . '.value' } eq 'unused' )
  $current++;              {
  if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {              }
     push (@truelist,$name);              else {
     if ($Apache::response::foilgroup{$name.'.location'} eq 'top') {                  &Apache::lonxml::error(
  $top{$name}=$current;                      &HTML::Entities::encode(
     } elsif ($Apache::response::foilgroup{$name.'.location'} eq 'bottom') {  "No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>",
  $bottom{$name}=$current;                          '<>&"'
                       )
                   );
               }
           }
           if (   ( !$havetrue )
               && ( $Apache::lonhomework::type ne 'survey' )
               && ( $Apache::lonhomework::type ne 'surveycred' )
               && ( $Apache::lonhomework::type ne 'anonsurvey' )
               && ( $Apache::lonhomework::type ne 'anonsurveycred' ) )
           {
               &Apache::lonxml::error(
                   &mt('There are no true statements available.') . '<br />' );
           }
       }
       else {
           my $current = 0;
           &Apache::lonhomework::showhash(%Apache::response::foilgroup);
           my ( %top, %bottom );
   
           #first find out where everyone wants to be
           foreach my $name (@names) {
               $current++;
               if ( $Apache::response::foilgroup{ $name . '.value' } eq 'true' ) {
                   push( @truelist, $name );
                   if ( $Apache::response::foilgroup{ $name . '.location' } eq
                       'top' )
                   {
                       $top{$name} = $current;
                   }
                   elsif ( $Apache::response::foilgroup{ $name . '.location' } eq
                       'bottom' )
                   {
                       $bottom{$name} = $current;
                   }
               }
               elsif (
                   $Apache::response::foilgroup{ $name . '.value' } eq 'false' )
               {
                   push( @falselist, $name );
                   if ( $Apache::response::foilgroup{ $name . '.location' } eq
                       'top' )
                   {
                       $top{$name} = $current;
                   }
                   elsif ( $Apache::response::foilgroup{ $name . '.location' } eq
                       'bottom' )
                   {
                       $bottom{$name} = $current;
                   }
               }
               elsif (
                   $Apache::response::foilgroup{ $name . '.value' } eq 'unused' )
               {
               }
               else {
                   &Apache::lonxml::error(
                       &HTML::Entities::encode(
   "No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>",
                           '<>&"'
                       )
                   );
               }
           }
   
           #pick a true statement
           my $notrue = 0;
           if ( scalar(@truelist) == 0 ) { $notrue = 1; }
           my $whichtrue =
             int( &Math::Random::random_uniform() * ( $#truelist + 1 ) );
           &Apache::lonxml::debug(
               "Max is $max, From $#truelist elms, picking $whichtrue");
           my ( @toplist, @bottomlist );
           my $topcount    = 0;
           my $bottomcount = 0;
   
           # assign everyone to either toplist/bottomlist or whichfalse
           # which false is randomized, toplist bottomlist are in order
           while (( ( $#whichfalse + $topcount + $bottomcount ) < $max - 2 )
               && ( $#falselist > -1 ) )
           {
               &Apache::lonxml::debug("Have $#whichfalse max is $max");
               my $afalse =
                 int( &Math::Random::random_uniform() * ( $#falselist + 1 ) );
               &Apache::lonxml::debug("From $#falselist elms, picking $afalse");
               $afalse = splice( @falselist, $afalse, 1 );
               &Apache::lonxml::debug("Picked $afalse");
               &Apache::lonhomework::showhash( ( 'names' => \@names ) );
               &Apache::lonhomework::showhash(%top);
               if ( $top{$afalse} ) {
                   $toplist[ $top{$afalse} ] = $afalse;
                   $topcount++;
               }
               elsif ( $bottom{$afalse} ) {
                   $bottomlist[ $bottom{$afalse} ] = $afalse;
                   $bottomcount++;
               }
               else {
                   push( @whichfalse, $afalse );
               }
           }
           &Apache::lonxml::debug("Answer wants $answer");
           my $truename = $truelist[$whichtrue];
           my $dosplice = 1;
           if (   ($notrue)
               && ( $Apache::lonhomework::type ne 'survey' )
               && ( $Apache::lonhomework::type ne 'surveycred' )
               && ( $Apache::lonhomework::type ne 'anonsurvey' )
               && ( $Apache::lonhomework::type ne 'anonsurveycred' ) )
           {
               $dosplice = 0;
               &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 )
           {
               $toplist[ $top{$truename} ] = $truename;
               $answer = -1;
               foreach my $top ( reverse(@toplist) ) {
                   if ($top) { $answer++; }
                   if ( $top eq $truename ) { last; }
               }
               $dosplice = 0;
           }
           elsif (
               $Apache::response::foilgroup{ $truename . '.location' } eq 'bottom'
               && $dosplice )
           {
               $bottomlist[ $bottom{$truename} ] = $truename;
               $answer = -1;
               foreach my $bot (@bottomlist) {
                   if ($bot) { $answer++; }
                   if ( $bot eq $truename ) { last; }
               }
               $answer += $topcount + $#whichfalse + 1;
               $dosplice = 0;
           }
           else {
               if ( $topcount > 0 || $bottomcount > 0 ) {
                   my $inc = 1;
                   if (   ( $bottomcount > 0 )
                       && ( $Apache::lonhomework::type ne 'exam' ) )
                   {
                       $inc = 2;
                   }
                   $answer = int(
                       &Math::Random::random_uniform() * ( $#whichfalse + $inc ) )
                     + $topcount;
               }
           }
           &Apache::lonxml::debug("Answer now wants $answer");
   
           #add the top items to the top, bottom items to the bottom
           for ( my $i = 0 ; $i <= $#toplist ; $i++ ) {
               if ( $toplist[$i] ) { unshift( @whichfalse, $toplist[$i] ) }
           }
           for ( my $i = 0 ; $i <= $#bottomlist ; $i++ ) {
               if ( $bottomlist[$i] ) { push( @whichfalse, $bottomlist[$i] ) }
           }
   
           #if the true statement is randomized insert it into the list
           if ($dosplice) {
               splice( @whichfalse, $answer, 0, $truelist[$whichtrue] );
           }
       }
       &Apache::lonxml::debug("Answer is $answer");
       return ( $answer, @whichfalse );
   }
   
   ## 
   #  Return a list  of foil texts given foil names.
   #  
   # @param $whichfoils - Reference to a list of foil names.
   #
   # @return array
   # @retval foil texts
   #
   sub get_foil_texts {
       my ($whichfoils) = @_;
       my @foil_texts;
   
       foreach my $name (@{$whichfoils}) {
    push(@foil_texts, $Apache::response::foilgroup{$name . '.text'});
       }
       return @foil_texts;
   }
   
   ##
   # Generate the HTML for a single html foil.
   # @param $part           - The part for which the response is being generated.
   # @param $fieldname      - The basename of the radiobutton field
   # @param $name           - The foilname.
   # @param $last_responses - Reference to a hash that holds the most recent
   #                          responses.
   # @param $value          - radiobutton value.
   # 
   # @return text
   # @retval The generated html.
   #
   sub html_radiobutton {
       my ($part, $fieldname, $name, $last_responses, $value) = @_;
   
       my $result='<label>';
       
       $result .= '<input type="radio"
                   onchange="javascript:setSubmittedPart(' . "'$part');\""
    . 'name="HWVAL_' . $fieldname . '"'
    . "value='$value'";
   
       if (defined($last_responses->{$name})) {
    $result .= '  checked="checked" ';
       }
       $result .= ' />';
       $result .= $Apache::response::foilgroup{$name . '.text'};
       $result .= '</label>';
   
       return $result;
   
   }
   ##
   # Return a reference to the last response hash. This hash has exactly
   # one or zero entries.  The one entry is keyed by the foil 'name' of
   # the prior response
   #
   # @param $part - Number of the problem part.
   # 
   # @return reference to a hash.
   # @retval see above.
   #
   sub get_last_response {
       my ($part) = @_;
   
       my $id = $Apache::inputtags::response['-1'];
       my ( $lastresponse, $newvariation );
       
       if ((( $Apache::lonhomework::history{"resource.$part.type"} eq  'randomizetry')
    || ( $Apache::lonhomework::type eq 'randomizetry' )
    )
    && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
    )
       {
   
    if ( $env{ 'form.' . $part . '.rndseed' } ne
        $Apache::lonhomework::history{"resource.$part.rndseed"} )
    {
       $newvariation = 1;
    }
       }
       unless ($newvariation) {
    $lastresponse =
       $Apache::lonhomework::history{"resource.$part.$id.submission"};
       }
       my %lastresponse = &Apache::lonnet::str2hash($lastresponse);
   
       return \%lastresponse;
   }
   
   ##
   # Display foils in html rendition.:
   #
   # @param $whichfoils - Set of foils to display.
   # @param $target     - Rendition target...there are several html targets.
   # @param $direction  - 'horizontal' if layout is horizontal.
   # @param $part       - Part of the problem that's being displayed.
   # @param $solved     - Solution state of the problem.
   # @param $show_answer- True if answers should be shown.
   #
   # @return string
   # @retval generated html.
   #
   sub display_foils_html {
       my ($whichfoils, $target, $direction, $part, $solved, $show_answer) = @_;
       my $result;
   
       # if the answers get shown, we need to label each item as correct or
       # incorrect.
   
       if ($show_answer) {
    my $item_pretext     = '<br />'; # html prior to each item
    my $item_posttext    = ''; # html after each item.
    my $finalclose       = ''; # html to close off the whole shebang
   
   
    # Horizontal layout is a table with each foil in a cell
   
    if ($direction eq 'horizontal') {
       $result        = '<table><tr>';
       $item_pretext  = '<td>' . $item_pretext;
       $item_posttext = '</td>';
       $finalclose    = '</tr></table>';
    } 
   
    foreach my $name (@{$whichfoils}) {
   
       # If the item gets further surrounded by tags, this 
       # holds the closures for those tages.
   
       my $item_closetag = '';
   
       $result .= $item_pretext;
   
       # Label each foil as correct or incorrect:
   
       if ($Apache::response::foilgroup{$name . '.value'} eq 'true') {
    $result .= &mt('Correct:') . '<b>';
    $item_closetag .= '</b>';
   
       } else {
    $result .= &mt('Incorrect');
       }
   
       # Web rendition encloses the 
       # item text in a label tag as well:
   
       if ($target eq 'web') {
    $result .= '<label>';
    $item_closetag = '</label>' . $item_closetag;
       }
       $result .= $Apache::response::foilgroup{$name . '.text'};
       $result .= $item_closetag;
       $result .= $item_posttext;
       $result .= "\n"; # make the html a bit more readable.
    }
   
    $result .= $finalclose;
   
       } else {
    $result .= '<br />'; # end line prior to foilgroup:
   
    #  Not showing the answers, we need to generate the HTML appropriate
    #  to allowing the student to respond.
   
    my $item_pretext;
    my $item_posttext;
    my $lastresponse = &get_last_response($part);
   
    if ( $direction eq 'horizontal' ) {
       $item_pretext  = '<td>';
       $item_posttext = '</td>';
    }
    else {
       $item_pretext = '<br/>';
    }
    my $item_no = 0;
    foreach my $name (@{$whichfoils}) {
       $result .= $item_pretext;
       $result .= &html_radiobutton(
    $part, $Apache::inputtags::response[-1],
    $name, $lastresponse, $item_no
    );
       $result .= $item_posttext;
       $item_no++;
    }
   
    if ($direction eq 'horizontal' ) {
               $result .= "</tr></table>";
           } else {
        $result .= "<br />"; 
    }
       }
   
       return $result;
   }
   ##
   #  Display foils in exam mode for latex
   #
   # @param $whichfoils       - Reference to an array that contains the foil names to display
   # @param $bubbles_per_line - Number of bubbles on a line.
   # @param $direction        - Rendering direction 'horizontal' is what we're looking for.
   # @param $vbegin           - Start latex fragment in vertical rendering.
   # @param $vend             - End latex fragmentin vertical rendering.
   #
   # @return string
   # @return the latex rendering of the exam problem.
   #
   #
   sub display_latex_exam {
       my ($whichfoils, $bubbles_per_line, $direction, $vbegin, $vend) = @_;
       my $result;
       my $numlines;
       my $bubble_number = 0;
       my $line          = 0;
       my $i             = 0;
   
   
       if ($direction eq  'horizontal') {
   
    # Marshall the display text for each foil and turn things over to
    # Apache::response::make_horizontal_bubbles:
   
    my @foil_texts = &get_foil_texts($whichfoils);
    $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
       $whichfoils, \@foil_texts, '$\bigcirc$');
   
   
       } else {
    $result .= $vbegin;
   
    # This section puts out the prefix that tells the user
    # (if necessary) to only choose one bubble in the next n lines
    # for problems with more than one line worth of bubbles in the grid sheet:
   
    my $numitems = scalar( @{$whichfoils} );
    $numlines = int( $numitems / $bubbles_per_line );
    if ( ( $numitems % $bubbles_per_line ) != 0 ) {
       $numlines++;
    }
    if ( $numlines < 1 ) {
       $numlines = 1;
    }
    if ( $numlines > 1 ) {
       my $linetext;
       for ( my $i = 0 ; $i < $numlines ; $i++ ) {
    $linetext .= $Apache::lonxml::counter + $i . ', ';
     }      }
  } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {      $linetext =~ s/,\s$//;
     push (@falselist,$name);      $result .=
     if ($Apache::response::foilgroup{$name.'.location'} eq 'top') {   '\item[\small {\textbf{'
  $top{$name}=$current;   . $linetext . '}}]'
     } elsif ($Apache::response::foilgroup{$name.'.location'} eq 'bottom') {   . ' {\footnotesize '
  $bottom{$name}=$current;   . &mt( '(Bubble once in [_1] lines)', $numlines )
    . '} \hspace*{\fill} \\\\';
    }
    else {
       $result .= '\item[\textbf{' . $Apache::lonxml::counter . '}.]';
    }
   
    # Now output the bubbles themselves:
   
    foreach my $name (@{$whichfoils}) {
       if ( $bubble_number >= $bubbles_per_line ) {
    $line++;
    $i             = 0;
    $bubble_number = 0;
     }      }
  } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {      my $identifier;
  } else {      if ( $numlines > 1 ) {
     &Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>"));   $identifier = $Apache::lonxml::counter + $line;
  }      }
     }      $result .=
     #pick a true statement   '{\small \textbf{'
     my $whichtrue = int(&Math::Random::random_uniform() * ($#truelist+1));   . $identifier
     &Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");   . $alphabet[$i]
     my (@toplist, @bottomlist);   . '}}$\bigcirc$'
     my $topcount=0;   . $Apache::response::foilgroup{ $name . '.text' }
     # assign everyone to either toplist/bottomlist or whichfalse      . '\\\\';    #' stupid emacs -- it thinks it needs that apostrophe to close the quote
     # which false is randomized, toplist bottomlist are in order      
     while ((($#whichfalse) < $max-2) && ($#falselist > -1)) {      $i++;
  &Apache::lonxml::debug("Have $#whichfalse max is $max");      $bubble_number++;
  my $afalse=int(&Math::Random::random_uniform() * ($#falselist+1));  
  &Apache::lonxml::debug("From $#falselist elms, picking $afalse");  
  $afalse=splice(@falselist,$afalse,1);  
  &Apache::lonxml::debug("Picked $afalse");  
  &Apache::lonhomework::showhash(('names'=>\@names));  
  &Apache::lonhomework::showhash(%top);  
  if ($top{$afalse}) {  
     $toplist[$top{$afalse}]=$afalse;  
     $topcount++;  
  } elsif ($bottom{$afalse}) {  
     $bottomlist[$bottom{$afalse}]=$afalse;  
  } else {  
     push (@whichfalse,$afalse);  
  }  
     }  
     my $truename=$truelist[$whichtrue];  
     my $dosplice=1;  
     #insert the true statement, keeping track of where it wants to be  
     if ($Apache::response::foilgroup{$truename.'.location'} eq 'top' ) {  
  $toplist[$top{$truename}]=$truename;  
  $answer=-1;  
  foreach my $top (reverse(@toplist)) {  
     if ($top) { $answer++;}  
     if ($top eq $truename) { last; }  
  }  
  $dosplice=0;  
     } elsif ($Apache::response::foilgroup{$truename.'.location'} eq 'bottom') {  
  $bottomlist[$bottom{$truename}]=$truename;  
  $answer=-1;  
  foreach my $bot (@bottomlist) {  
     if ($bot) { $answer++;}  
     if ($bot eq $truename) { last; }  
  }   }
  $answer+=$topcount+$#whichfalse+1;   $result .= $vend
  $dosplice=0;  
       }
   
       return $result;
       
   }
   
   ##
   #  Display latex when exam mode is not on.
   #
   #  @param $whichfoils - The foils to display
   #  @param $direction  - Display direction ('horizontal' is what matters to us).
   #  @param $vbegin     - Begin the vertical environment being used.
   #  @param  $vend      - End the vertical environment being used.
   #
   #  @return string
   #  @retval - The LaTeX rendering of the resource.'
   #
   sub display_latex {
       my ($whichfoils, $direction, $vbegin, $vend) = @_;
       my $result;
   
       # how we render depends on the direction.
       # Vertical is some kind of list environment determined by vbegin/vend.
       # Horizontal is a table that is generated by 
       # Apache::caparesponse::make_horizontal_latex_bubbles with an empty string
       # for the actual bubble text.
   
       if ($direction eq 'horizontal') {
    my @foil_texts = &get_foil_texts($whichfoils);
    $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
       $whichfoils, \@foil_texts, '');
     } else {      } else {
  if ($topcount>0) {    $result .= $vbegin;
   $answer = int(&Math::Random::random_uniform() * ($#whichfalse+1))   foreach my $name (@{$whichfoils}) {
     + $topcount;      $result .=  '\vspace*{-2 mm}\item '
  }   . $Apache::response::foilgroup{ $name . '.text' };
     }   }
     #add the top items to the top, bottom items to the bottom  
     for (my $i=0;$i<=$#toplist;$i++) {   $result .= $vend;
  if ($toplist[$i]) { unshift(@whichfalse,$toplist[$i]) }      }
     }      return $result;
     for (my $i=0;$i<=$#bottomlist;$i++) {  }
  if ($bottomlist[$i]) { push(@whichfalse,$bottomlist[$i]) }  
     }  
     #if the true statement is randomized insert it into the list  ##
     if ($dosplice) { splice(@whichfalse,$answer,0,$truelist[$whichtrue]); }  #  Render foils for a PDF form. This is a variant of tex rednering that provides
   }  #  sufficient markup that the final PDF is a form that can be filled in online,
   &Apache::lonxml::debug("Answer is $answer");  #  or offline.
   return ($answer,@whichfalse);  #
   # @param $whichfoils - References an array of foils to display in the order in which
   #                     they should be displayed.
   # @param $direction  - Rendering direction.  'horiztonal' means inputs are laid out
   #                      horizontally otherwise they are stacked vertically.
   #
   # @return string
   # @retval String containing the rendering of the resource.
   #
   sub display_pdf_form {
       my ($whichfoils) = @_;
       my $temp = 0;
       my $result;
   
       foreach my $name ( @{$whichfoils} ) {
   
    my $fieldname =
       $env{'request.symb'} 
    . '&part_'
       . $Apache::inputtags::part
       . '&radiobuttonresponse'
       . '&HWVAL_'
       . $Apache::inputtags::response['-1'];
    $result .= '\item[{'
       . &Apache::lonxml::print_pdf_radiobutton( $fieldname,
         $temp )
       . '}]'
       . $Apache::response::foilgroup{ $name . '.text' }
    . "\n";
   
    $temp++;
       }
   
       return $result;
 }  }
   
   
   ##
   # Display selected foils:  This is really just a dispatchter to appropriate renderers
   #  
   # @param $target   - Target (e.g. 'tex'...).
   # @param $answer   - True if answers should be shown.
   # @param $whichfoils - Array of foil selectors that indicate which foils shouild be
   #                      rendered, in rendering order.
   # @param $direction- Rendering direction ('horizontal' is the one we look for,
   #                    otherwise foils are rendered one per line vertically.
   # @param $bubbles_per_line - number of exam bubbles per line.
   #
   # @return string
   # @retval The rendered problem.
   
 sub displayfoils {  sub displayfoils {
   my ($target,$max,$randomize)=@_;      my ( $target, $answer, $whichfoils, $direction, $bubbles_per_line ) = @_;
   my $result;      my $result;
   
       my $part   = $Apache::inputtags::part;
       my $solved = $Apache::lonhomework::history{"resource.$part.solved"};
   
       # Show answers html.
   
       if ( ( $target ne 'tex' )
           && &Apache::response::show_answer() )
       {
   
    $result = &display_foils_html(
       $whichfoils, $target, $direction, $part, $solved, 1);
   
    # other html
       }  elsif ($target ne 'tex') {
       $result = &display_foils_html($whichfoils, $target, $direction, $part,
     0, 0);
   
          # LaTeX rendering:
       } else {
   
   my ($answer,@whichfoils)=&whichfoils($max,$randomize);          my $i             = 0;
   my $part=$Apache::inputtags::part;          my $bubble_number = 0;
   my $solved=$Apache::lonhomework::history{"resource.$part.solved"};          my $line          = 0;
   my $status=$Apache::inputtags::status[-1];          my $temp          = 0;
   if ( ($target ne 'tex') &&          my $id            = $Apache::inputtags::response['-1'];
        (($solved =~ /^correct/) || ($status eq  'SHOW_ANSWER')) ) {          my $part          = $Apache::inputtags::part;
     foreach my $name (@whichfoils) {  
       if ($target ne 'tex') {  
   $result.="<br />";  
       } else {   my $numlines;
   $result.='\item \vskip -2 mm  ';  
       }   # Decide how to bracket the list of foils:
       if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {   
   if ($target ne 'tex') { $result.='Correct:<b>'; } else { $result.='Correct: \textbf{';}   my $begin_environment;
       } else {   my $end_environment;
  $result.='Incorrect:';  
       }          if (   $env{'form.pdfFormFields'} eq 'yes'
       if ($target ne 'tex') {              && $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
   $result.=$Apache::response::foilgroup{$name.'.text'}."</input>\n";          {
       } else {              $begin_environment = '\begin{itemize}';
   $result.=$Apache::response::foilgroup{$name.'.text'};      $end_environment   = '\end{itemize}';
       }          }
       if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {          else {
   if ($target ne 'tex') { $result.='</b>';} else {$result.='}';}              $begin_environment = '\begin{enumerate}';
       }      $end_environment   = '\end{enumerate}';
     }          }
   } else {  
     my @alphabet = ('A'..'Z');   # Rendering for latex exams.
     my $i = 0;  
     my $temp=0;     if ( ( $Apache::lonhomework::type eq 'exam' ) )
     my $id=$Apache::inputtags::response['-1'];   {
     my $part=$Apache::inputtags::part;      $result .= &display_latex_exam(
     my $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};   $whichfoils, $bubbles_per_line, $direction, $begin_environment, 
     my %lastresponse=&Apache::lonnet::str2hash($lastresponse);   $end_environment);
     foreach my $name (@whichfoils) {  
       if ($target ne 'tex') {      $result .= '\vskip 0mm ';
   $result.="<br /><input type=\"radio\" name=\"HWVAL$Apache::inputtags::response['-1']\" value=\"$temp\" ";      
   if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }   } else {    
   $result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</input>\n";  
       } else {      # Different rendering for PDF form than for a
   if ($Apache::lonhomework::type eq 'exam') {      # 'regular' answer direction is honored in both of those
       $result .= '{\small \textbf{'.$alphabet[$i].'}}$\bigcirc$'.$Apache::response::foilgroup{$name.'.text'}.'\\\\';  #' stupid emacs      #
       $i++;  
   } else {      if ( ($env{'form.pdfFormFields'} eq 'yes')
       $result .= '\vspace*{-2 mm}\item '.$Apache::response::foilgroup{$name.'.text'};      && ($Apache::inputtags::status[-1] eq 'CAN_ANSWER'))
   }      {
       }   $result .= $begin_environment;
       $temp++;   $result .= &display_pdf_form($whichfoils, $direction);
     }   $result .= $end_environment;
   }      } else {
   if ($target ne 'tex') { $result.="<br />"; } else { $result.='\vskip 0 mm '; }   $result .= &display_latex(
   return $result;       $whichfoils,  $direction, $begin_environment, $end_environment
       );
       }
       $result .= '\vskip 0 mm '; 
          
    }
   
   
       }
       return $result;
   }
   
   sub displayallanswers {
       my @names;
       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',
               $Apache::response::foilgroup{ $name . '.value' } );
       }
       $result .= &Apache::response::answer_footer('radiobuttonresponse');
       return $result;
 }  }
   
 sub displayanswers {  sub displayanswers {
   my ($max,$randomize)=@_;      my ( $answer, $whichopt, $bubbles_per_line ) = @_;
   my ($answer,@whichopt) = &whichfoils($max,$randomize);      my $result;
   my $result=&Apache::response::answer_header('radiobuttonresponse');  
   foreach my $name (@whichopt) {      if ( $Apache::lonhomework::type eq 'exam' ) {
     $result.=&Apache::response::answer_part('radiobuttonresponse',          my $line    = int( $answer / $bubbles_per_line );
      $Apache::response::foilgroup{$name.'.value'})          my $correct = ( 'A' .. 'Z' )[ $answer % $bubbles_per_line ];
   }          $result .=
   $result.=&Apache::response::answer_footer('radiobuttonresponse');            &Apache::response::answer_header( 'radiobuttonresponse', $line );
   return $result;          $result .=
             &Apache::response::answer_part( 'radiobuttonresponse', $correct );
       }
       else {
           $result .= &Apache::response::answer_header('radiobuttonresponse');
       }
       foreach my $name ( @{$whichopt} ) {
           $result .=
             &Apache::response::answer_part( 'radiobuttonresponse',
               $Apache::response::foilgroup{ $name . '.value' } );
       }
       $result .= &Apache::response::answer_footer('radiobuttonresponse');
       return $result;
 }  }
   
 sub start_conceptgroup {  sub start_conceptgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
   $Apache::radiobuttonresponse::conceptgroup=1;        @_;
   %Apache::response::conceptgroup=();      $Apache::radiobuttonresponse::conceptgroup = 1;
   my $result;      %Apache::response::conceptgroup            = ();
   if ($target eq 'edit') {      my $result;
     $result.=&Apache::edit::tag_start($target,$token);      if ( $target eq 'edit' ) {
     $result.=&Apache::edit::text_arg('Concept:','concept',$token,'50').          $result .= &Apache::edit::tag_start( $target, $token );
  &Apache::edit::end_row().&Apache::edit::start_spanning_row();          $result .=
   } elsif ($target eq 'modified') {              &Apache::edit::text_arg( 'Concept:', 'concept', $token, '50' )
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,            . &Apache::edit::end_row()
  $safeeval,'concept');            . &Apache::edit::start_spanning_row();
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }      }
   }      elsif ( $target eq 'modified' ) {
   return $result;          my $constructtag =
             &Apache::edit::get_new_args( $token, $parstack, $safeeval,
               'concept' );
           if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       }
       return $result;
 }  }
   
 sub end_conceptgroup {  sub end_conceptgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
   $Apache::radiobuttonresponse::conceptgroup=0;        @_;
   my $result;      $Apache::radiobuttonresponse::conceptgroup = 0;
   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'  || $target eq 'tex') {      my $result;
     if (defined(@{ $Apache::response::conceptgroup{'names'} })) {      if (   $target eq 'web'
       my @names = @{ $Apache::response::conceptgroup{'names'} };          || $target eq 'grade'
       my $pick=int(&Math::Random::random_uniform() * ($#names+1));          || $target eq 'answer'
       my $name=$names[$pick];          || $target eq 'tex'
       push @{ $Apache::response::foilgroup{'names'} }, $name;          || $target eq 'analyze' )
       $Apache::response::foilgroup{"$name.text"} =  $Apache::response::conceptgroup{"$name.text"};      {
       $Apache::response::foilgroup{"$name.value"} = $Apache::response::conceptgroup{"$name.value"};          &Apache::response::pick_foil_for_concept( $target,
       $Apache::response::foilgroup{"$name.location"} = $Apache::response::conceptgroup{"$name.location"};              [ 'value', 'text', 'location' ],
       my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);              \%Apache::hint::radiobutton, $parstack, $safeeval );
       $Apache::response::foilgroup{"$name.concept"} = $concept;      }
       &Apache::lonxml::debug("Selecting $name in $concept");      elsif ( $target eq 'edit' ) {
       my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";          $result = &Apache::edit::end_table();
       push(@{ $Apache::hint::radiobutton{"$part_id.concepts"} },$concept);      }
       $Apache::hint::radiobutton{"$part_id.concept.$concept"}=      return $result;
   $Apache::response::conceptgroup{'names'};  
     }  
   } elsif ($target eq 'edit') {  
     $result=&Apache::edit::end_table();  
   }  
   return $result;  
 }  }
   
 sub insert_conceptgroup {  sub insert_conceptgroup {
   my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";      my $result =
   return $result;          "\n\t\t<conceptgroup concept=\"\">"
         . &insert_foil()
         . "\n\t\t</conceptgroup>\n";
       return $result;
 }  }
   
 sub start_foil {  sub start_foil {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
   my $result='';        @_;
   if ($target eq 'web' || $target eq 'tex') {      my $result = '';
     &Apache::lonxml::startredirection;      if ( $target eq 'web' || $target eq 'tex' || $target eq 'analyze' ) {
   } elsif ($target eq 'edit') {          &Apache::lonxml::startredirection;
     $result=&Apache::edit::tag_start($target,$token);          if ( $target eq 'analyze' ) {
     $result.=&Apache::edit::text_arg('Name:','name',$token);              &Apache::response::check_if_computed( $token, $parstack, $safeeval,
     $result.=&Apache::edit::select_or_text_arg('Correct Option:','value',                  'value' );
        ['unused','true','false'],$token);          }
     my $randomize=&Apache::lonxml::get_param('randomize',$parstack,      }
      $safeeval,'-3');      elsif ( $target eq 'edit' ) {
     if ($randomize ne 'no') {          $result = &Apache::edit::tag_start( $target, $token );
       $result.=&Apache::edit::select_arg('Location:','location',          $result .= &Apache::edit::text_arg( 'Name:', 'name', $token );
  ['random','top','bottom'],$token);          $result .= &Apache::edit::select_or_text_arg(
     }              'Correct Option:', 'value',
     $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();              [ 'unused', 'true', 'false' ], $token
   } elsif ($target eq 'modified') {          );
      my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,          my $randomize =
   'value','name','location');            &Apache::lonxml::get_param( 'randomize', $parstack, $safeeval, '-3' );
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }          if ( $randomize ne 'no' ) {
   }               $result .=
   return $result;                &Apache::edit::select_arg( 'Location:', 'location',
                   [ 'random', 'top', 'bottom' ], $token );
           }
           $result .=
             &Apache::edit::end_row() . &Apache::edit::start_spanning_row();
       }
       elsif ( $target eq 'modified' ) {
           my $constructtag =
             &Apache::edit::get_new_args( $token, $parstack, $safeeval, 'value',
               'name', 'location' );
           if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       }
       return $result;
 }  }
   
 sub end_foil {  sub end_foil {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
   my $text='';        @_;
   if ($target eq 'web' || $target eq 'tex') { $text=&Apache::lonxml::endredirection; }      my $text = '';
   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'  || $target eq 'tex') {      if ( $target eq 'web' || $target eq 'tex' || $target eq 'analyze' ) {
     my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);          $text = &Apache::lonxml::endredirection;
     if ($value ne 'unused') {      }
       my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);      if (   $target eq 'web'
       my $location =&Apache::lonxml::get_param('location',$parstack,$safeeval);          || $target eq 'grade'
       if (!$name) { $name=$Apache::lonxml::curdepth; }          || $target eq 'answer'
       if ( $Apache::radiobuttonresponse::conceptgroup          || $target eq 'tex'
    && !&Apache::response::showallfoils() ) {          || $target eq 'analyze' )
  push @{ $Apache::response::conceptgroup{'names'} }, $name;      {
  $Apache::response::conceptgroup{"$name.value"} = $value;          my $value = &Apache::lonxml::get_param( 'value', $parstack, $safeeval );
  $Apache::response::conceptgroup{"$name.text"} = $text;          if ( $value ne 'unused' ) {
  $Apache::response::conceptgroup{"$name.location"} = $location;              my $name =
       } else {                &Apache::lonxml::get_param( 'name', $parstack, $safeeval );
  push @{ $Apache::response::foilgroup{'names'} }, $name;              if ( $name eq "" ) {
  $Apache::response::foilgroup{"$name.value"} = $value;                  &Apache::lonxml::warning(
  $Apache::response::foilgroup{"$name.text"} = $text;                      &mt(
  $Apache::response::foilgroup{"$name.location"} = $location;  '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 [_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, $safeeval );
               if ( $Apache::radiobuttonresponse::conceptgroup
                   && !&Apache::response::showallfoils() )
               {
                   push @{ $Apache::response::conceptgroup{'names'} }, $name;
                   $Apache::response::conceptgroup{"$name.value"}    = $value;
                   $Apache::response::conceptgroup{"$name.text"}     = $text;
                   $Apache::response::conceptgroup{"$name.location"} = $location;
               }
               else {
                   push @{ $Apache::response::foilgroup{'names'} }, $name;
                   $Apache::response::foilgroup{"$name.value"}    = $value;
                   $Apache::response::foilgroup{"$name.text"}     = $text;
                   $Apache::response::foilgroup{"$name.location"} = $location;
               }
           }
     }      }
   }      return '';
   return '';  
 }  }
   
 sub insert_foil {  sub insert_foil {
   return '      return '
 <foil name="" value="unused">  <foil name="" value="unused">
 <startouttext />  <startouttext />
 <endouttext />  <endouttext />
 </foil>';  </foil>';
 }  }
   
 1;  1;
 __END__  __END__
   
   
   
   =head1 NAME
   
   Apache::radiobuttonresponse
   
   =head1 SYNOPSIS
   
   Handles multiple-choice style responses.
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   =head1 SUBROUTINES
   
   =over
   
   =item start_radiobuttonresponse()
   
   =item bubble_line_count()
   
   =item end_radiobuttonresponse()
   
   =item start_foilgroup()
   
   =item storesurvey()
   
   =item grade_response()
   
   =item end_foilgroup()
   
   =item getfoilcounts()
   
   =item format_prior_answer()
   
   =item displayallfoils()
   
   =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
   
   =item displayfoils()
   
   =item displayallanswers()
   
   =item displayanswers()
   
   =item start_conceptgroup()
   
   =item end_conceptgroup()
   
   =item insert_conceptgroup()
   
   =item start_foil()
   
   =item end_foil()
   
   =item insert_foil()
   
   =back
   
   =cut
     
Removed from v.1.67  
changed lines
  Added in v.1.153.6.6

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