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version 1.24, 2001/08/13 21:01:32 version 1.106, 2006/03/27 21:18:16
Line 1 Line 1
 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # mutliple choice style responses  # mutliple choice style responses
 # 2/21 Guy  #
   # $Id$
   #
   # 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/
   #
   
 package Apache::radiobuttonresponse;  package Apache::radiobuttonresponse;
 use strict;  use strict;
   use HTML::Entities();
   use Apache::lonlocal;
   use Apache::lonnet;
   
 sub BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));      &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));
 }  }
   
 sub start_radiobuttonresponse {  sub start_radiobuttonresponse {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   #when in a radiobutton response use these      my $result;
   &Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));      #when in a radiobutton response use these
   my $id = &Apache::response::start_response($parstack,$safeeval);      &Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
   return '';      push (@Apache::lonxml::namespace,'radiobuttonresponse');
       my $id = &Apache::response::start_response($parstack,$safeeval);
       %Apache::hint::radiobutton=();
       undef(%Apache::response::foilnames);
       if ($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($token).
       &Apache::loncommon::help_open_topic('Radio_Response_Problems').
       "</td><td>Delete:".
       &Apache::edit::deletelist($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::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}.}';
    }
    $result .= '\begin{enumerate}';
       } elsif ($target eq 'analyze') {
    my $part_id="$Apache::inputtags::part.$id";
    push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
       }
       return $result;
 }  }
   
 sub end_radiobuttonresponse {  sub end_radiobuttonresponse {
   &Apache::response::end_response;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   return '';      my $result;
       if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
       if ($target eq 'tex') { $result .= '\end{enumerate}'; }
       &Apache::response::end_response;
       pop @Apache::lonxml::namespace;
       &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 {
   %Apache::response::foilgroup={};      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   $Apache::radiobuttonresponse::conceptgroup=0;      my $result;
   &Apache::response::setrandomnumber();      %Apache::response::foilgroup=();
   return '';      $Apache::radiobuttonresponse::conceptgroup=0;
       &Apache::response::pushrandomnumber();
       if ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') {
    $result.='\item[\textbf{'.$Apache::lonxml::counter.'}.]';
       }
       return $result;
 }  }
   
 sub storesurvey {  sub storesurvey {
   if ( defined $ENV{'form.submitted'}) {      if ( !&Apache::response::submitted() ) { return ''; }
     my $response = $ENV{'form.HWVAL'.$Apache::inputtags::response['-1']};      my $response = $env{'form.HWVAL_'.$Apache::inputtags::response['-1']};
     &Apache::lonxml::debug("Here I am!:$response:");      &Apache::lonxml::debug("Here I am!:$response:");
     if ( $response =~ /[^\s]/) {      if ( $response !~ /[0-9]+/) { return ''; }
       my $id = $Apache::inputtags::response['-1'];      my $part = $Apache::inputtags::part;
       $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=$response;      my $id = $Apache::inputtags::response['-1'];
       $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='SUBMITTED';      my @whichfoils=@{ $Apache::response::foilgroup{'names'} };
       &Apache::lonxml::debug("submitted a $response<br />\n");      my %responsehash;
       $responsehash{$whichfoils[$response]}=$response;
       my $responsestr=&Apache::lonnet::hash2str(%responsehash);
       $Apache::lonhomework::results{"resource.$part.$id.submission"}=
    $responsestr;
       my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
       my $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='SUBMITTED';
       &Apache::response::handle_previous(\%previous,$ad);
       &Apache::lonxml::debug("submitted a $response<br />\n");
       return '';
   }
   
   sub grade_response {
       my ($max,$randomize)=@_;
       #keep the random numbers the same must always call this
       my ($answer,@whichfoils)=&whichfoils($max,$randomize);
       if ( !&Apache::response::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;
   return '';      &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' || $target eq 'web') {      if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
     my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval,'-2');   $target eq 'tex' || $target eq 'analyze') {
     if ( $style eq 'survey' ) {   my $style = $Apache::lonhomework::type;
       if ($target eq 'web') {   my $direction = &Apache::lonxml::get_param('direction',$parstack,
  $result=&displayallfoils();     $safeeval,'-2');
       } elsif ( $target eq 'grade' ) {   if ( $style eq 'survey'  && $target ne 'analyze') {
  $result=&storesurvey();      if ($target eq 'web' || $target eq 'tex') {
       }   $result=&displayallfoils($direction);
     } else {      } elsif ( $target eq 'answer' ) {
       my $name;   $result=&displayallanswers();
       my ($truecnt,$falsecnt,$max) = &getfoilcounts($parstack,$safeeval);      } elsif ( $target eq 'grade' ) {
       my $count=0;   $result=&storesurvey();
       # we will add in 1 of the true statements      }
       if (($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; }   } else {
       my $answer = int(rand ($count));      my $name;
       &Apache::lonxml::debug("Answer is $answer, $count from $max, $falsecnt");      my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,
       if ($target eq 'web') {   '-2');
  $result=&displayfoils($max,$answer);      my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
       } elsif ( $target eq 'grade') {         $safeeval,'-2');
  if ( defined $ENV{'form.submitted'}) {      if ($target eq 'web' || $target eq 'tex') {
   my $response = $ENV{'form.HWVAL'.$Apache::inputtags::response['-1']};   $result=&displayfoils($target,$max,$randomize,$direction);
   if ( $response =~ /[^\s]/) {      } elsif ($target eq 'answer' ) {
     my $id = $Apache::inputtags::response['-1'];   $result=&displayanswers($max,$randomize);
     $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=$response;      } elsif ( $target eq 'grade') {
     &Apache::lonxml::debug("submitted a $response<br />\n");   &grade_response($max,$randomize);
     if ($response == $answer) {      }  elsif ( $target eq 'analyze') {
       $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='EXACT_ANS';   my @shown = &whichfoils($max,$randomize);
     } else {   &Apache::response::analyze_store_foilgroup(\@shown,
       $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='INCORRECT';     ['text','value','location']);
    my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
    push (@{ $Apache::lonhomework::analyze{"$part_id.options"} },
         ('true','false'));
     }      }
   }  
  }   }
       }  
     }      }
   }      &Apache::response::poprandomnumber();
   return $result;      &Apache::lonxml::increment_counter();
       return $result;
 }  }
   
 sub getfoilcounts {  sub getfoilcounts {
   my ($parstack,$safeeval)=@_;      my @names;
   my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');      my $truecnt=0;
   my @names = @{ $Apache::response::foilgroup{'names'} };      my $falsecnt=0;
   my $truecnt=0;      my $name;
   my $falsecnt=0;      if ( $Apache::response::foilgroup{'names'} ) {
   my $name;   @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++;  
     }      }
   }      foreach $name (@names) {
   return ($truecnt,$falsecnt,$max);   if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
       $truecnt++;
    } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
       $falsecnt++;
    }
       }
       return ($truecnt,$falsecnt);
 }  }
   
 sub displayallfoils {  sub displayallfoils {
   my $result;      my ($direction)=@_;
   &Apache::lonxml::debug("survey style display");      my $result;
   my @names = @{ $Apache::response::foilgroup{'names'} };      &Apache::lonxml::debug("survey style display");
   my $temp=0;      my @names;
   my $id=$Apache::inputtags::response['-1'];      if ( $Apache::response::foilgroup{'names'} ) {
   my $part=$Apache::inputtags::part;   @names= @{ $Apache::response::foilgroup{'names'} };
   my $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};      }
   foreach my $name (@names) {      my $temp=0;
     if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {      my $id=$Apache::inputtags::response['-1'];
       $result.="<br /><input type=\"radio\" name=\"HWVAL$Apache::inputtags::response['-1']\" value=\"$temp\" ";      my $part=$Apache::inputtags::part;
       if ($lastresponse eq $temp) { $result .= 'checked="on"'; }      my $lastresponse=
       $result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</input>\n";   $Apache::lonhomework::history{"resource.$part.$id.submission"};
       $temp++;      if ($direction eq 'horizontal') { $result.='<table><tr>'; }
       my %lastresponse=&Apache::lonnet::str2hash($lastresponse);
       if (&Apache::response::show_answer() ) {
    foreach my $name (@names) {
       if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {
    if ($direction eq 'horizontal') {
       $result.="<td>";
    } else {
       $result.="<br />";
    }
    if (defined($lastresponse{$name})) {
       $result.='<b>';
    }
    $result .= $Apache::response::foilgroup{$name.'.text'};
    if (defined($lastresponse{$name})) {
       $result.='</b>';
    }
    if ($direction eq 'horizontal') { $result.="</td>"; }
       }
    }
       } else {
    foreach my $name (@names) {
       if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {
    if ($direction eq 'horizontal') {
       $result.="<td>";
    } else {
       $result.="<br />";
    }
                   $result .= '<label>';
    $result.="<input type=\"radio\" name=\"HWVAL_$Apache::inputtags::response['-1']\" value=\"$temp\" ";
    if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }
    $result .= '>'.$Apache::response::foilgroup{$name.'.text'}.
                       '</label>';
    $temp++;
    if ($direction eq 'horizontal') { $result.="</td>"; }
       }
    }
       }
       if ($direction eq 'horizontal') { $result.='</tr></table>'; }
       return $result;
   }
   
   sub whichfoils {
       my ($max,$randomize)=@_;
   
       my @truelist;
       my @falselist;
       my @whichfalse =();
       my ($truecnt,$falsecnt) = &getfoilcounts();
       my $count=0;
       # we will add in 1 of the true statements
       if ( $max>0 && ($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; $max=$count; }
       my $answer=int(&Math::Random::random_uniform() * ($count));
       &Apache::lonxml::debug("Count is $count, $answer is $answer");
       my @names;
       if ( $Apache::response::foilgroup{'names'} ) {
    @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 $name in <foilgroup>",'<>&"'));
       }
    }
    if (!$havetrue && $Apache::lonhomework::type ne 'survey') {
       &Apache::lonxml::error("There are no true statements available.<br />");
    }
       } else {
    my $current=0;
    &Apache::lonhomework::showhash(%Apache::response::foilgroup);
    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') {
       $dosplice=0;
       &Apache::lonxml::error("There are no true statements available.<br />");
    }
    #insert the true statement, keeping track of where it wants to be
    if ($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;
       $dosplice=0;
    } else {
       if ($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]); }
     }      }
   }      &Apache::lonxml::debug("Answer is $answer");
   return $result;      return ($answer,@whichfalse);
 }  }
   
 sub displayfoils {  sub displayfoils {
   my ($max,$answer)=@_;      my ($target,$max,$randomize,$direction)=@_;
   my @names = @{ $Apache::response::foilgroup{'names'} };      my $result;
   my @truelist;  
   my @falselist;      my ($answer,@whichfoils)=&whichfoils($max,$randomize);
   my $result;      my $part=$Apache::inputtags::part;
   my $name;      my $solved=$Apache::lonhomework::history{"resource.$part.solved"};
       if ( ($target ne 'tex') &&
   foreach $name (@names) {   &Apache::response::show_answer() ) {
     #result.="<br /><b>$name</b> is <i> $Apache::response::foilgroup{$name.'.value'} </i>";   if ($direction eq 'horizontal') {
     if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {      if ($target ne 'tex') {
       push (@truelist,$name);   $result.='<table><tr>';
     } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {      }
       push (@falselist,$name);   }
     } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {   foreach my $name (@whichfoils) {
       if ($direction eq 'horizontal') {
    if ($target ne 'tex') { $result.='<td>'; }
       }
       if ($target ne 'tex') {
    $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 eq 'web') { $result.="<label>"; }
       $result.=$Apache::response::foilgroup{$name.'.text'};
       if ($target eq 'web') { $result.="</label>"; }
       if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
    if ($target ne 'tex') { $result.='</b>';} else {$result.='}';}
       }
       if ($direction eq 'horizontal') {
    if ($target ne 'tex') { $result.='</td>'; }
       }
    }
    if ($direction eq 'horizontal') {
       if ($target ne 'tex') {
    $result.='</tr></table>';
       }
    }
     } else {      } else {
       &Apache::lonxml::error("Unknown state $Apache::response::foilgroup{$name.'.value'} for $name in <foilgroup>");   my @alphabet = ('A'..'Z');
    my $i = 0;
    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($lastresponse);
    if ($target ne 'tex' && $direction eq 'horizontal') {
       $result.="<table><tr>";
    }
    foreach my $name (@whichfoils) {
       if ($target ne 'tex') {
    if ($direction eq 'horizontal') {
       $result.="<td>"; 
    } else { 
       $result.="<br />";
    } 
       }
       if ($target ne 'tex') { 
                   $result.= '<label>';
    $result.="<input type=\"radio\" name=\"HWVAL_$Apache::inputtags::response['-1']\" value=\"$temp\" ";
    if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }
    $result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</label>";
       } else {
    if ($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{$name.'.text'};
    }
       }
       if ($target ne 'tex' && $direction eq 'horizontal') {
    $result.="</td>"; 
       }
       $temp++;
    }
    if ($target ne 'tex' && $direction eq 'horizontal') {
       $result.="</tr></table>";
    }
     }      }
   }      if ($target ne 'tex') { if ($direction ne 'horizontal') { $result.="<br />";} } else { $result.='\vskip 0 mm '; }
   my $whichtrue = int(rand($#truelist+1));      return $result;
   &Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");  }
   my @whichfalse =();  
   while ((($#whichfalse+1) < $max) && ($#falselist > -1)) {  sub displayallanswers {
     &Apache::lonxml::debug("Have $#whichfalse max is $max");      my @names;
     my $afalse=int(rand($#falselist+1));      if ( $Apache::response::foilgroup{'names'} ) {
     &Apache::lonxml::debug("From $#falselist elms, picking $afalse");   @names= @{ $Apache::response::foilgroup{'names'} };
     $afalse=splice(@falselist,$afalse,1);  
     &Apache::lonxml::debug("Picked $afalse");  
     push (@whichfalse,$afalse);  
   }  
   splice(@whichfalse,$answer,0,$truelist[$whichtrue]);  
   &Apache::lonxml::debug("the true statement is $answer");  
   if ($Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"} =~ /^correct/ ) {  
     foreach $name (@whichfalse) {  
       $result.="<br />";  
       if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {   
  $result.='Correct';  
       } else {  
  $result.='Incorrect';  
       }  
       $result.=":".$Apache::response::foilgroup{$name.'.text'}."</input>\n";  
     }      }
   } else {    
     my $temp=0;      my $result=&Apache::response::answer_header('radiobuttonresponse');
     my $id=$Apache::inputtags::response['-1'];      foreach my $name (@names) {
     my $part=$Apache::inputtags::part;   $result.=&Apache::response::answer_part('radiobuttonresponse',
     my $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};   $Apache::response::foilgroup{$name.'.value'});
     foreach $name (@whichfalse) {  
        $result.="<br /><input type=\"radio\" name=\"HWVAL$Apache::inputtags::response['-1']\" value=\"$temp\" ";  
       if ($lastresponse eq $temp) { $result .= 'checked="on"'; }  
       $result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</input>\n";  
       $temp++;  
     }      }
   }      $result.=&Apache::response::answer_footer('radiobuttonresponse');
   return $result."<br />";      return $result;
   }
   
   sub displayanswers {
       my ($max,$randomize)=@_;
       my ($answer,@whichopt) = &whichfoils($max,$randomize);
       my $result=&Apache::response::answer_header('radiobuttonresponse');
       if ($Apache::lonhomework::type eq 'exam') {
    my $correct = ('A'..'Z')[$answer];
    $result.=&Apache::response::answer_part('radiobuttonresponse',
    $correct);
       }
       foreach my $name (@whichopt) {
    $result.=&Apache::response::answer_part('radiobuttonresponse',
    $Apache::response::foilgroup{$name.'.value'});
       }
       $result.=&Apache::response::answer_footer('radiobuttonresponse');
       return $result;
 }  }
   
 sub start_conceptgroup {  sub start_conceptgroup {
   $Apache::radiobuttonresponse::conceptgroup=1;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   %Apache::response::conceptgroup={};      $Apache::radiobuttonresponse::conceptgroup=1;
   return '';      %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 {  sub end_conceptgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   $Apache::radiobuttonresponse::conceptgroup=0;      $Apache::radiobuttonresponse::conceptgroup=0;
   if ($target eq 'web' || $target eq 'grade') {      my $result;
     my @names = @{ $Apache::response::conceptgroup{'names'} };      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'  ||
     my $pick=int rand $#names+1;   $target eq 'tex' || $target eq 'analyze') {
     my $name=$names[$pick];   &Apache::response::pick_foil_for_concept($target,
     push @{ $Apache::response::foilgroup{'names'} }, $name;   ['value','text','location'],
     $Apache::response::foilgroup{"$name.text"} =  $Apache::response::conceptgroup{"$name.text"};   \%Apache::hint::radiobutton,
     $Apache::response::foilgroup{"$name.value"} = $Apache::response::conceptgroup{"$name.value"};   $parstack,$safeeval);
     my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);      } elsif ($target eq 'edit') {
     $Apache::response::foilgroup{"$name.concept"} = $concept;   $result=&Apache::edit::end_table();
     &Apache::lonxml::debug("Selecting $name in $concept");      }
   }      return $result;
   return '';  }
   
   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 {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $result='';      my $result='';
   if ($target eq 'web') { &Apache::lonxml::startredirection; }      if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
   return '';   &Apache::lonxml::startredirection;
    if ($target eq 'analyze') {
       &Apache::response::check_if_computed($token,$parstack,$safeeval,'value');
    }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::text_arg('Name:','name',$token);
    $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,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $text='';      my $text='';
   if ($target eq 'web') { $text=&Apache::lonxml::endredirection; }      if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
   if ($target eq 'web' || $target eq 'grade') {   $text=&Apache::lonxml::endredirection;
     my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);  
     if ($value ne 'unused') {  
       my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);  
       if ( $Apache::radiobuttonresponse::conceptgroup ) {  
  push @{ $Apache::response::conceptgroup{'names'} }, $name;  
  $Apache::response::conceptgroup{"$name.value"} = $value;  
  $Apache::response::conceptgroup{"$name.text"} = $text;  
       } else {  
  push @{ $Apache::response::foilgroup{'names'} }, $name;  
  $Apache::response::foilgroup{"$name.value"} = $value;  
  $Apache::response::foilgroup{"$name.text"} = $text;  
       }  
     }      }
   }      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'
   return '';   || $target eq 'tex' || $target eq 'analyze') {
    my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
    if ($value ne 'unused') {
       my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
       if ($name eq "") {
    &Apache::lonxml::warning("Foils without names exist. This can cause problems to malfunction.");
    $name=$Apache::lonxml::curdepth;
       }
       if (defined($Apache::response::foilnames{$name})) {
    &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
       }
       $Apache::response::foilnames{$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 '';
 }  }
   
   sub insert_foil {
       return '
   <foil name="" value="unused">
   <startouttext />
   <endouttext />
   </foil>';
   }
 1;  1;
 __END__  __END__
     
Removed from v.1.24  
changed lines
  Added in v.1.106

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