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version 1.10, 2001/01/19 21:44:12 version 1.76, 2003/10/24 18:06:06
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 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # mutliple choice style responses  # mutliple choice style responses
   #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   # 2/21 Guy
   
 package Apache::radiobuttonresponse;  package Apache::radiobuttonresponse;
 use strict;  use strict;
   use HTML::Entities();
   
 sub BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));    &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));
 }  }
   
 sub start_radiobuttonresponse {  sub start_radiobuttonresponse {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
   #when in a radiobutton response use these    #when in a radiobutton response use these
   &Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil'));    &Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
     push (@Apache::lonxml::namespace,'radiobuttonresponse');
   my $id = &Apache::response::start_response($parstack,$safeeval);    my $id = &Apache::response::start_response($parstack,$safeeval);
   return '';    %Apache::hint::radiobutton=();
     if ($target eq 'meta') {
       $result=&Apache::response::meta_package_write('radiobuttonresponse');
     } elsif ($target eq 'edit' ) {
       $result.=&Apache::edit::start_table($token).
    '<tr><td>'.&Apache::lonxml::description($token)."</td><td>Delete:".
    &Apache::edit::deletelist($target,$token)
    ."</td><td>&nbsp".&Apache::edit::end_row()
           .&Apache::edit::start_spanning_row();
   
       $result.=
    &Apache::edit::text_arg('Max Number Of Shown Foils:','max',$token,'4').
    &Apache::edit::select_arg('Randomize Foil Order','randomize',
     ['yes','no'],$token).
           &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n";
     } elsif ($target eq 'modified') {
       my $constructtag=&Apache::edit::get_new_args($token,$parstack,
    $safeeval,'max','randomize');
       if ($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}.}';
         }
         $result .= '\begin{enumerate}';
     }
     return $result;
 }  }
   
 sub end_radiobuttonresponse {  sub end_radiobuttonresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
     if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
     if ($target eq 'tex') { $result .= '\end{enumerate}'; }
   &Apache::response::end_response;    &Apache::response::end_response;
   return '';    pop @Apache::lonxml::namespace;
     &Apache::lonxml::deregister('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
     return $result;
 }  }
   
 %Apache::response::foilgroup={};  %Apache::response::foilgroup=();
 sub start_foilgroup {  sub start_foilgroup {
   %Apache::response::foilgroup={};    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   return '';    my $result;
     %Apache::response::foilgroup=();
     $Apache::radiobuttonresponse::conceptgroup=0;
     &Apache::response::setrandomnumber();
     if ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') {
         $result.='\item[\textbf{'.$Apache::lonxml::counter.'}.]';
     }
     return $result;
 }  }
   
 sub setrandomnumber {  sub storesurvey {
   my $rndseed=&Apache::lonnet::rndseed();    if ( !defined($ENV{'form.submitted'})) { return ''; }
   $rndseed=unpack("%32i",$rndseed);    my $response = $ENV{'form.HWVAL_'.$Apache::inputtags::response['-1']};
   $rndseed=$rndseed    &Apache::lonxml::debug("Here I am!:$response:");
     +&Apache::lonnet::numval($Apache::inputtags::part)    if ( $response !~ /[0-9]+/) { return ''; }
       +&Apache::lonnet::numval($Apache::inputtags::response['-1']);    my $id = $Apache::inputtags::response['-1'];
   srand($rndseed);    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';
     &Apache::lonxml::debug("submitted a $response<br />\n");
   return '';    return '';
 }  }
   
   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; }
     my $response;
     if ($ENV{'form.submitted'} eq 'scantron') {
         $response=&Apache::response::getresponse();
     } 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;
     my $responsestr=&Apache::lonnet::hash2str(%responsehash);
     my %previous=&Apache::response::check_for_previous($responsestr,
        $part,$id);
     $Apache::lonhomework::results{"resource.$part.$id.submission"}=
       $responsestr;
     &Apache::lonxml::debug("submitted a $response<br />\n");
     my $ad;
     if ($response == $answer) {
       $ad='EXACT_ANS';
     } else {
       $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,$parstack,$parser,$safeeval,$style)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     
   my $result;    my $result;
   if ($target ne 'meta') {    if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex') {
     my $name;      my $style = $Apache::lonhomework::type;
     &setrandomnumber();      if ( $style eq 'survey' ) {
     my ($truecnt,$falsecnt,$max) = &getfoilcounts($parstack,$safeeval);        if ($target eq 'web' || $target eq 'answer' || $target eq 'tex') {
     my $count=0;   $result=&displayallfoils();
     # we will add in 1 of the true statements        } elsif ( $target eq 'grade' ) {
     if (($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; }   $result=&storesurvey();
     my $answer = int(rand ($count));        }
     &Apache::lonxml::debug("Answer is $answer, $count from $max, $falsecnt");      } else {
     if ($target eq 'web') {        my $name;
       $result=&displayfoils($max,$answer);        my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
     } elsif ( $target eq 'grade') {        my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
       if ( defined $ENV{'form.submitted'}) {   $safeeval,'-2');
  my $response = $ENV{'form.HWVAL'.$Apache::inputtags::response['-1']};        if ($target eq 'web' || $target eq 'tex') {
  if ( $response =~ /[^\s]/) {   $result=&displayfoils($target,$max,$randomize);
   my $id = $Apache::inputtags::response['-1'];        } elsif ($target eq 'answer' ) {
   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=$response;   $result=&displayanswers($max,$randomize);
   &Apache::lonxml::debug("submitted a $response<br>\n");        } elsif ( $target eq 'grade') {
   if ($response == $answer) {   &grade_response($max,$randomize);
     $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='EXACT_ANS';  
   } else {  
     $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='INCORRECT';  
   }  
  }  
       }        }
     }      }
   }    }
     &Apache::lonxml::increment_counter();
   return $result;    return $result;
 }  }
   
 sub getfoilcounts {  sub getfoilcounts {
   my ($parstack,$safeeval)=@_;    my @names;
   my $rrargs ='';  
   if ( $#$parstack > 0 ) { $rrargs=$$parstack['-2']; }  
   my $max = &Apache::run::run("{$rrargs;".'return $max}',$safeeval);  
   my @names = @{ $Apache::response::foilgroup{'names'} };  
   my $truecnt=0;    my $truecnt=0;
   my $falsecnt=0;    my $falsecnt=0;
   my $name;    my $name;
     if ( $Apache::response::foilgroup{'names'} ) {
       @names= @{ $Apache::response::foilgroup{'names'} };
     }
   foreach $name (@names) {    foreach $name (@names) {
     if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {      if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
       $truecnt++;        $truecnt++;
Line 88  sub getfoilcounts { Line 193  sub getfoilcounts {
       $falsecnt++;        $falsecnt++;
     }      }
   }    }
   return ($truecnt,$falsecnt,$max);    return ($truecnt,$falsecnt);
 }  }
   
 sub displayfoils {  sub displayallfoils {
   my ($max,$answer)=@_;    my $result;
     &Apache::lonxml::debug("survey style display");
   my @names = @{ $Apache::response::foilgroup{'names'} };    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::response::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 my $name (@names) {
         if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {
    $result.="<br /><input type=\"radio\" name=\"HWVAL_$Apache::inputtags::response['-1']\" value=\"$temp\" ";
    if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }
    $result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</input>\n";
    $temp++;
         }
       }
     }
     return $result;
   }
   
   sub whichfoils {
     my ($max,$randomize)=@_;
   
   my @truelist;    my @truelist;
   my @falselist;    my @falselist;
   my $result;    my @whichfalse =();
   my $name;    my ($truecnt,$falsecnt) = &getfoilcounts();
     my $count=0;
   foreach $name (@names) {    # we will add in 1 of the true statements
     #result.="<br><b>$name</b> is <i> $Apache::response::foilgroup{$name.'.value'} </i>";    if (($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; }
     if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {    my $answer=int(&Math::Random::random_uniform() * ($count));
       push (@truelist,$name);    &Apache::lonxml::debug("Count is $count, $answer is $answer");
     } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {    my @names;
       push (@falselist,$name);    if ( $Apache::response::foilgroup{'names'} ) {
     } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {        @names= @{ $Apache::response::foilgroup{'names'} };
     }
     if (&Apache::response::showallfoils()) {
         @whichfalse=@names;
     } elsif ($randomize eq 'no') {
         &Apache::lonxml::debug("No randomization");
         my $havetrue=0;
         foreach my $name (@names) {
     if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
         if (!$havetrue ) {
     push(@whichfalse,$name); $havetrue++; $answer=$#whichfalse;
         }
     } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
         push (@whichfalse,$name);
     } elsif ($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>"));
     }
         }
     } 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) {
    $dosplice=0;
    &Apache::lonxml::error("There are no true statements available.<br />");
       }
       #insert the true statement, keeping track of where it wants to be
       if ($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 {      } else {
       &Apache::lonxml::error("Unknown state $Apache::response::foilgroup{$name.'.value'} for $name in <foilgroup>");   if ($topcount>0 || $bottomcount>0) {
       $answer = int(&Math::Random::random_uniform() * ($#whichfalse+1))
    + $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]); }
   }    }
   my $whichtrue = rand $#truelist;    &Apache::lonxml::debug("Answer is $answer");
   &Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");    return ($answer,@whichfalse);
   my @whichfalse =();  }
   while ((($#whichfalse+2) < $max) && ($#falselist > -1)) {  
     my $afalse=rand $#falselist;  sub displayfoils {
     &Apache::lonxml::debug("From $#falselist elms, picking $afalse");    my ($target,$max,$randomize)=@_;
     $afalse=splice(@falselist,$afalse,1);    my $result;
     &Apache::lonxml::debug("Picked $afalse");  
     push (@whichfalse,$afalse);    my ($answer,@whichfoils)=&whichfoils($max,$randomize);
   }    my $part=$Apache::inputtags::part;
   splice(@whichfalse,$answer,0,$truelist[$whichtrue]);    my $solved=$Apache::lonhomework::history{"resource.$part.solved"};
   &Apache::lonxml::debug("the true statement is $answer");    if ( ($target ne 'tex') &&
   if ($Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"} =~ /^correct/ ) {         &Apache::response::show_answer() ) {
     foreach $name (@whichfalse) {      foreach my $name (@whichfoils) {
       $result.="<br />".$Apache::response::foilgroup{$name.'.value'}.        if ($target ne 'tex') {
  ":".$Apache::response::foilgroup{$name.'.text'}."</input>\n";    $result.="<br />";
         } else {
     $result.='\item \vskip -2 mm  ';
         }
         if ($Apache::response::foilgroup{$name.'.value'} eq 'true') { 
     if ($target ne 'tex') { $result.='Correct:<b>'; } else { $result.='Correct: \textbf{';}
         } else {
    $result.='Incorrect:';
         }
         if ($target ne 'tex') {
     $result.=$Apache::response::foilgroup{$name.'.text'}."</input>\n";
         } else {
     $result.=$Apache::response::foilgroup{$name.'.text'};
         }
         if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
     if ($target ne 'tex') { $result.='</b>';} else {$result.='}';}
         }
     }      }
   } else {    } else {
     my $temp=0;      my @alphabet = ('A'..'Z');
     foreach $name (@whichfalse) {      my $i = 0;
       $result.="<br /><input type=\"radio\" name=\"HWVAL$Apache::inputtags::response['-1']\" value=\"$temp\">".$Apache::response::foilgroup{$name.'.text'}."</input>\n";      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);
       foreach my $name (@whichfoils) {
         if ($target ne 'tex') {
     $result.="<br /><input type=\"radio\" name=\"HWVAL_$Apache::inputtags::response['-1']\" value=\"$temp\" ";
     if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }
     $result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</input>\n";
         } else {
     if ($Apache::lonhomework::type eq 'exam') {
         $result .= '{\small \textbf{'.$alphabet[$i].'}}$\bigcirc$'.$Apache::response::foilgroup{$name.'.text'}.'\\\\';  #' stupid emacs
         $i++;
     } else {
         $result .= '\vspace*{-2 mm}\item '.$Apache::response::foilgroup{$name.'.text'};
     }
         }
       $temp++;        $temp++;
     }      }
   }    }
   return $result."<br />";    if ($target ne 'tex') { $result.="<br />"; } else { $result.='\vskip 0 mm '; }
     return $result;
   }
   
   sub displayanswers {
     my ($max,$randomize)=@_;
     my ($answer,@whichopt) = &whichfoils($max,$randomize);
     my $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 {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     $Apache::radiobuttonresponse::conceptgroup=1;
     %Apache::response::conceptgroup=();
     my $result;
     if ($target eq 'edit') {
       $result.=&Apache::edit::tag_start($target,$token);
       $result.=&Apache::edit::text_arg('Concept:','concept',$token,'50').
    &Apache::edit::end_row().&Apache::edit::start_spanning_row();
     } elsif ($target eq 'modified') {
       my $constructtag=&Apache::edit::get_new_args($token,$parstack,
    $safeeval,'concept');
       if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
     }
     return $result;
   }
   
   sub end_conceptgroup {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     $Apache::radiobuttonresponse::conceptgroup=0;
     my $result;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'  || $target eq 'tex') {
       if (defined(@{ $Apache::response::conceptgroup{'names'} })) {
         my @names = @{ $Apache::response::conceptgroup{'names'} };
         my $pick=int(&Math::Random::random_uniform() * ($#names+1));
         my $name=$names[$pick];
         push @{ $Apache::response::foilgroup{'names'} }, $name;
         $Apache::response::foilgroup{"$name.text"} =  $Apache::response::conceptgroup{"$name.text"};
         $Apache::response::foilgroup{"$name.value"} = $Apache::response::conceptgroup{"$name.value"};
         $Apache::response::foilgroup{"$name.location"} = $Apache::response::conceptgroup{"$name.location"};
         my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
         $Apache::response::foilgroup{"$name.concept"} = $concept;
         &Apache::lonxml::debug("Selecting $name in $concept");
         my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
         push(@{ $Apache::hint::radiobutton{"$part_id.concepts"} },$concept);
         $Apache::hint::radiobutton{"$part_id.concept.$concept"}=
     $Apache::response::conceptgroup{'names'};
       }
     } elsif ($target eq 'edit') {
       $result=&Apache::edit::end_table();
     }
     return $result;
   }
   
   sub insert_conceptgroup {
     my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";
     return $result;
 }  }
   
 sub start_foil {  sub start_foil {
   $Apache::lonxml::redirection--;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   return '';    my $result='';
     if ($target eq 'web' || $target eq 'tex') {
       &Apache::lonxml::startredirection;
     } elsif ($target eq 'edit') {
       $result=&Apache::edit::tag_start($target,$token);
       $result.=&Apache::edit::text_arg('Name:','name',$token);
       $result.=&Apache::edit::select_or_text_arg('Correct Option:','value',
          ['unused','true','false'],$token);
       my $randomize=&Apache::lonxml::get_param('randomize',$parstack,
        $safeeval,'-3');
       if ($randomize ne 'no') {
         $result.=&Apache::edit::select_arg('Location:','location',
    ['random','top','bottom'],$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,$parstack,$parser,$safeeval,$style)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   if ($target eq 'web' || $target eq 'grade') {    my $text='';
     my $args ='';    if ($target eq 'web' || $target eq 'tex') { $text=&Apache::lonxml::endredirection; }
     if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'  || $target eq 'tex') {
     my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);      my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
     push @{ $Apache::response::foilgroup{'names'} }, $name;      if ($value ne 'unused') {
     my $value = &Apache::run::run("{$args;".'return $value}',$safeeval);        my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
     $Apache::response::foilgroup{"$name.value"} = $value;        my $location =&Apache::lonxml::get_param('location',$parstack,$safeeval);
     $Apache::response::foilgroup{"$name.text"} = $Apache::lonxml::outputstack;        if (!$name) { $name=$Apache::lonxml::curdepth; }
   }        if ( $Apache::radiobuttonresponse::conceptgroup
        && !&Apache::response::showallfoils() ) {
   $Apache::lonxml::redirection++;   push @{ $Apache::response::conceptgroup{'names'} }, $name;
   if ($Apache::lonxml::redirection == 1) {    $Apache::response::conceptgroup{"$name.value"} = $value;
     $Apache::lonxml::outputstack='';    $Apache::response::conceptgroup{"$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 {
     return '
   <foil name="" value="unused">
   <startouttext />
   <endouttext />
   </foil>';
   }
 1;  1;
 __END__  __END__
     
Removed from v.1.10  
changed lines
  Added in v.1.76

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