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Diff for /loncom/homework/radiobuttonresponse.pm between versions 1.75 and 1.88

version 1.75, 2003/10/24 17:58:55 version 1.88, 2004/05/07 17:18:45
Line 25 Line 25
 #  #
 # 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;
   
 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)=@_;
   my $result;      my $result;
   #when in a radiobutton response use these      #when in a radiobutton response use these
   &Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));      &Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
   push (@Apache::lonxml::namespace,'radiobuttonresponse');      push (@Apache::lonxml::namespace,'radiobuttonresponse');
   my $id = &Apache::response::start_response($parstack,$safeeval);      my $id = &Apache::response::start_response($parstack,$safeeval);
   %Apache::hint::radiobutton=();      %Apache::hint::radiobutton=();
   if ($target eq 'meta') {      undef(%Apache::response::foilnames);
     $result=&Apache::response::meta_package_write('radiobuttonresponse');      if ($target eq 'meta') {
   } elsif ($target eq 'edit' ) {   $result=&Apache::response::meta_package_write('radiobuttonresponse');
     $result.=&Apache::edit::start_table($token).      } elsif ($target eq 'edit' ) {
  '<tr><td>'.&Apache::lonxml::description($token)."</td><td>Delete:".   $result.=&Apache::edit::start_table($token).
  &Apache::edit::deletelist($target,$token)      '<tr><td>'.&Apache::lonxml::description($token).
  ."</td><td>&nbsp".&Apache::edit::end_row()      &Apache::loncommon::help_open_topic('Radio_Response_Problems').
         .&Apache::edit::start_spanning_row();      "</td><td>Delete:".
       &Apache::edit::deletelist($target,$token)
     $result.=      ."</td><td>&nbsp".&Apache::edit::end_row()
  &Apache::edit::text_arg('Max Number Of Shown Foils:','max',$token,'4').      .&Apache::edit::start_spanning_row();
  &Apache::edit::select_arg('Randomize Foil Order','randomize',   $result.=
   ['yes','no'],$token).      &Apache::edit::text_arg('Max Number Of Shown Foils:','max',
         &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n";      $token,'4').
   } elsif ($target eq 'modified') {      &Apache::edit::select_arg('Randomize Foil Order','randomize',
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,        ['yes','no'],$token).
  $safeeval,'max','randomize');        &Apache::edit::end_row().
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }        &Apache::edit::start_spanning_row()."\n";
   } elsif ($target eq 'tex') {      } elsif ($target eq 'modified') {
       my $type=&Apache::lonxml::get_param('TeXtype',$parstack,$safeeval,undef,0);   my $constructtag=&Apache::edit::get_new_args($token,$parstack,
       if ($type eq '1') {       $safeeval,'max',
   $result .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}';       'randomize');
       } elsif ($type eq 'A') {   if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
   $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';      } elsif ($target eq 'tex') {
       } elsif ($type eq 'a') {   my $type=&Apache::lonxml::get_param('TeXtype',$parstack,$safeeval,
   $result .= ' \renewcommand{\labelenumi}{\alph{enumi}.}';      undef,0);
       } elsif ($type eq 'i') {   if ($type eq '1') {
   $result .= ' \renewcommand{\labelenumi}{\roman{enumi}.}';      $result .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}';
       }   } elsif ($type eq 'A') {
       $result .= '\begin{enumerate}';      $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
   }   } elsif ($type eq 'a') {
   return $result;      $result .= ' \renewcommand{\labelenumi}{\alph{enumi}.}';
    } elsif ($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 {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $result;      my $result;
   if ($target eq 'edit') { $result=&Apache::edit::end_table(); }      if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
   if ($target eq 'tex') { $result .= '\end{enumerate}'; }      if ($target eq 'tex') { $result .= '\end{enumerate}'; }
   &Apache::response::end_response;      &Apache::response::end_response;
   pop @Apache::lonxml::namespace;      pop @Apache::lonxml::namespace;
   &Apache::lonxml::deregister('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));      &Apache::lonxml::deregister('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
   return $result;      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;      my $result;
   %Apache::response::foilgroup=();      %Apache::response::foilgroup=();
   $Apache::radiobuttonresponse::conceptgroup=0;      $Apache::radiobuttonresponse::conceptgroup=0;
   &Apache::response::setrandomnumber();      &Apache::response::setrandomnumber();
   if ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') {      if ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') {
       $result.='\item[\textbf{'.$Apache::lonxml::counter.'}.]';   $result.='\item[\textbf{'.$Apache::lonxml::counter.'}.]';
   }      }
   return $result;      return $result;
 }  }
   
 sub storesurvey {  sub storesurvey {
   if ( !defined($ENV{'form.submitted'})) { return ''; }      if ( !defined($ENV{'form.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 !~ /[0-9]+/) { return ''; }      if ( $response !~ /[0-9]+/) { return ''; }
   my $id = $Apache::inputtags::response['-1'];      my $id = $Apache::inputtags::response['-1'];
   my @whichfoils=@{ $Apache::response::foilgroup{'names'} };      my @whichfoils=@{ $Apache::response::foilgroup{'names'} };
   my %responsehash;      my %responsehash;
   $responsehash{$whichfoils[$response]}=$response;      $responsehash{$whichfoils[$response]}=$response;
   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=&Apache::lonnet::hash2str(%responsehash);      $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=&Apache::lonnet::hash2str(%responsehash);
   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='SUBMITTED';      $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='SUBMITTED';
   &Apache::lonxml::debug("submitted a $response<br />\n");      &Apache::lonxml::debug("submitted a $response<br />\n");
   return '';      return '';
 }  }
   
 sub grade_response {  sub grade_response {
   my ($max,$randomize)=@_;      my ($max,$randomize)=@_;
   #keep the random numbers the same must always call this      #keep the random numbers the same must always call this
   my ($answer,@whichfoils)=&whichfoils($max,$randomize);      my ($answer,@whichfoils)=&whichfoils($max,$randomize);
   if (!defined($ENV{'form.submitted'})) { return; }      if (!defined($ENV{'form.submitted'})) { return; }
   my $response;      my $response;
   if ($ENV{'form.submitted'} eq 'scantron') {      if ($ENV{'form.submitted'} eq 'scantron') {
       $response=&Apache::response::getresponse();   $response=&Apache::response::getresponse();
   } else {      } else {
       $response = $ENV{'form.HWVAL_'.$Apache::inputtags::response['-1']};   $response = $ENV{'form.HWVAL_'.$Apache::inputtags::response['-1']};
   }      }
   if ( $response !~ /[0-9]+/) { return; }      if ( $response !~ /[0-9]+/) { return; }
   my $part=$Apache::inputtags::part;      my $part=$Apache::inputtags::part;
   my $id = $Apache::inputtags::response['-1'];      my $id = $Apache::inputtags::response['-1'];
   my %responsehash;      my %responsehash;
   $responsehash{$whichfoils[$response]}=$response;      $responsehash{$whichfoils[$response]}=$response;
   my $responsestr=&Apache::lonnet::hash2str(%responsehash);      my $responsestr=&Apache::lonnet::hash2str(%responsehash);
   my %previous=&Apache::response::check_for_previous($responsestr,      my %previous=&Apache::response::check_for_previous($responsestr,
      $part,$id);         $part,$id);
   $Apache::lonhomework::results{"resource.$part.$id.submission"}=      $Apache::lonhomework::results{"resource.$part.$id.submission"}=
     $responsestr;   $responsestr;
   &Apache::lonxml::debug("submitted a $response<br />\n");      &Apache::lonxml::debug("submitted a $response<br />\n");
   my $ad;      my $ad;
   if ($response == $answer) {      if ($response == $answer) {
     $ad='EXACT_ANS';   $ad='EXACT_ANS';
   } else {      } else {
     $ad='INCORRECT';   $ad='INCORRECT';
   }      }
   $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;      $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
   &Apache::response::handle_previous(\%previous,$ad);      &Apache::response::handle_previous(\%previous,$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' || $target eq 'tex') {      if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
     my $style = $Apache::lonhomework::type;   $target eq 'tex' || $target eq 'analyze') {
     if ( $style eq 'survey' ) {   my $style = $Apache::lonhomework::type;
       if ($target eq 'web' || $target eq 'answer' || $target eq 'tex') {   if ( $style eq 'survey'  && $target ne 'analyze') {
  $result=&displayallfoils();      if ($target eq 'web' || $target eq 'tex') {
       } elsif ( $target eq 'grade' ) {   $result=&displayallfoils();
  $result=&storesurvey();      } elsif ( $target eq 'answer' ) {
       }   $result=&displayallanswers();
     } else {      } elsif ( $target eq 'grade' ) {
       my $name;   $result=&storesurvey();
       my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');      }
       my $randomize = &Apache::lonxml::get_param('randomize',$parstack,   } else {
  $safeeval,'-2');      my $name;
       if ($target eq 'web' || $target eq 'tex') {      my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,
  $result=&displayfoils($target,$max,$randomize);   '-2');
       } elsif ($target eq 'answer' ) {      my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
  $result=&displayanswers($max,$randomize);         $safeeval,'-2');
       } elsif ( $target eq 'grade') {      if ($target eq 'web' || $target eq 'tex') {
  &grade_response($max,$randomize);   $result=&displayfoils($target,$max,$randomize);
       }      } elsif ($target eq 'answer' ) {
     }   $result=&displayanswers($max,$randomize);
   }      } elsif ( $target eq 'grade') {
   if ($target ne 'answer') {&Apache::lonxml::increment_counter();}   &grade_response($max,$randomize);
   return $result;      }  elsif ( $target eq 'analyze') {
    my @shown = &whichfoils($max,$randomize);
    &Apache::response::analyze_store_foilgroup(\@shown,
      ['text','value','location']);
    my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
    push (@{ $Apache::lonhomework::analyze{"$part_id.options"} },
         ('true','false'));
       }
    }
       }
       &Apache::lonxml::increment_counter();
       return $result;
 }  }
   
 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++;  
     }      }
   }      foreach $name (@names) {
   return ($truecnt,$falsecnt);   if ($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 $result;
   &Apache::lonxml::debug("survey style display");      &Apache::lonxml::debug("survey style display");
   my @names = @{ $Apache::response::foilgroup{'names'} };      my @names = @{ $Apache::response::foilgroup{'names'} };
   my $temp=0;      my $temp=0;
   my $id=$Apache::inputtags::response['-1'];      my $id=$Apache::inputtags::response['-1'];
   my $part=$Apache::inputtags::part;      my $part=$Apache::inputtags::part;
   my $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};      my $lastresponse=
   my %lastresponse=&Apache::lonnet::str2hash($lastresponse);   $Apache::lonhomework::history{"resource.$part.$id.submission"};
   if (&Apache::response::show_answer() ) {      my %lastresponse=&Apache::lonnet::str2hash($lastresponse);
     foreach my $name (@names) {      if (&Apache::response::show_answer() ) {
       if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {   foreach my $name (@names) {
  $result.="<br />".$Apache::response::foilgroup{$name.'.value'};      if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {
  if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {   $result.="<br />";
   $result.='<b>';   if (defined($lastresponse{$name})) {
       $result.='<b>';
    }
    $result .= $Apache::response::foilgroup{$name.'.text'};
    if (defined($lastresponse{$name})) {
       $result.='</b>';
    }
       }
  }   }
  $result .= $Apache::response::foilgroup{$name.'.text'};      } else {
  if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {   foreach my $name (@names) {
   $result.='</b>';      if ($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++;
       }
  }   }
       }  
     }  
   } 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;
   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 $count=0;
   # we will add in 1 of the true statements      # we will add in 1 of the true statements
   if (($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; }      if (($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; }
   my $answer=int(&Math::Random::random_uniform() * ($count));      my $answer=int(&Math::Random::random_uniform() * ($count));
   &Apache::lonxml::debug("Count is $count, $answer is $answer");      &Apache::lonxml::debug("Count is $count, $answer is $answer");
   my @names;      my @names;
   if ( $Apache::response::foilgroup{'names'} ) {      if ( $Apache::response::foilgroup{'names'} ) {
       @names= @{ $Apache::response::foilgroup{'names'} };   @names= @{ $Apache::response::foilgroup{'names'} };
   }      }
   if (&Apache::response::showallfoils()) {      if (&Apache::response::showallfoils()) {
       @whichfalse=@names;   @whichfalse=@names;
   } elsif ($randomize eq 'no') {      } elsif ($randomize eq 'no') {
       &Apache::lonxml::debug("No randomization");   &Apache::lonxml::debug("No randomization");
       my $havetrue=0;   my $havetrue=0;
       foreach my $name (@names) {   foreach my $name (@names) {
   if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {      if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
       if (!$havetrue ) {   if (!$havetrue ) {
   push(@whichfalse,$name); $havetrue++; $answer=$#whichfalse;      push(@whichfalse,$name); $havetrue++; $answer=$#whichfalse;
       }   }
   } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {      } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
       push (@whichfalse,$name);   push (@whichfalse,$name);
   } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {      } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {
   } else {      } else {
       &Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>"));   &Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($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);      } else {
     if ($Apache::response::foilgroup{$name.'.location'} eq 'top') {   my $current=0;
  $top{$name}=$current;   &Apache::lonhomework::showhash(%Apache::response::foilgroup);
     } elsif ($Apache::response::foilgroup{$name.'.location'} eq 'bottom') {   my (%top,%bottom);
  $bottom{$name}=$current;   #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 $name in <foilgroup>",'<>&"'));
     }      }
  } elsif ($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
     #pick a true statement   my $notrue=0;
     my $notrue=0;   if (scalar(@truelist) == 0) { $notrue=1; }
     if (scalar(@truelist) == 0) { $notrue=1; }   my $whichtrue = int(&Math::Random::random_uniform() * ($#truelist+1));
     my $whichtrue = int(&Math::Random::random_uniform() * ($#truelist+1));   &Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");
     &Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");   my (@toplist, @bottomlist);
     my (@toplist, @bottomlist);   my $topcount=0;
     my $topcount=0;   my $bottomcount=0;
     my $bottomcount=0;   # assign everyone to either toplist/bottomlist or whichfalse
     # assign everyone to either toplist/bottomlist or whichfalse   # which false is randomized, toplist bottomlist are in order
     # which false is randomized, toplist bottomlist are in order   while ((($#whichfalse+$topcount+$bottomcount) < $max-2) && ($#falselist > -1)) {
     while ((($#whichfalse+$topcount+$bottomcount) < $max-2) && ($#falselist > -1)) {      &Apache::lonxml::debug("Have $#whichfalse max is $max");
  &Apache::lonxml::debug("Have $#whichfalse max is $max");      my $afalse=int(&Math::Random::random_uniform() * ($#falselist+1));
  my $afalse=int(&Math::Random::random_uniform() * ($#falselist+1));      &Apache::lonxml::debug("From $#falselist elms, picking $afalse");
  &Apache::lonxml::debug("From $#falselist elms, picking $afalse");      $afalse=splice(@falselist,$afalse,1);
  $afalse=splice(@falselist,$afalse,1);      &Apache::lonxml::debug("Picked $afalse");
  &Apache::lonxml::debug("Picked $afalse");      &Apache::lonhomework::showhash(('names'=>\@names));
  &Apache::lonhomework::showhash(('names'=>\@names));      &Apache::lonhomework::showhash(%top);
  &Apache::lonhomework::showhash(%top);      if ($top{$afalse}) {
  if ($top{$afalse}) {   $toplist[$top{$afalse}]=$afalse;
     $toplist[$top{$afalse}]=$afalse;   $topcount++;
     $topcount++;      } elsif ($bottom{$afalse}) {
  } elsif ($bottom{$afalse}) {   $bottomlist[$bottom{$afalse}]=$afalse;
     $bottomlist[$bottom{$afalse}]=$afalse;   $bottomcount++;
     $bottomcount++;      } else {
    push (@whichfalse,$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;
       $dosplice=0;
  } else {   } else {
     push (@whichfalse,$afalse);      if ($topcount>0 || $bottomcount>0) {
    $answer = int(&Math::Random::random_uniform() * ($#whichfalse+1))
       + $topcount;
       }
  }   }
     }   &Apache::lonxml::debug("Answer now wants $answer");
     &Apache::lonxml::debug("Answer wants $answer");   #add the top items to the top, bottom items to the bottom
     my $truename=$truelist[$whichtrue];   for (my $i=0;$i<=$#toplist;$i++) {
     my $dosplice=1;      if ($toplist[$i]) { unshift(@whichfalse,$toplist[$i]) }
     if ($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;   for (my $i=0;$i<=$#bottomlist;$i++) {
  $dosplice=0;      if ($bottomlist[$i]) { push(@whichfalse,$bottomlist[$i]) }
     } else {   }
  if ($topcount>0 || $bottomcount>0) {   #if the true statement is randomized insert it into the list
     $answer = int(&Math::Random::random_uniform() * ($#whichfalse+1))   if ($dosplice) { splice(@whichfalse,$answer,0,$truelist[$whichtrue]); }
  + $topcount;      }
  }      &Apache::lonxml::debug("Answer is $answer");
     }      return ($answer,@whichfalse);
     &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);  
 }  }
   
 sub displayfoils {  sub displayfoils {
   my ($target,$max,$randomize)=@_;      my ($target,$max,$randomize)=@_;
   my $result;      my $result;
   
   my ($answer,@whichfoils)=&whichfoils($max,$randomize);      my ($answer,@whichfoils)=&whichfoils($max,$randomize);
   my $part=$Apache::inputtags::part;  
   my $solved=$Apache::lonhomework::history{"resource.$part.solved"};  
   if ( ($target ne 'tex') &&  
        &Apache::response::show_answer() ) {  
     foreach my $name (@whichfoils) {  
       if ($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 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 {  
     my @alphabet = ('A'..'Z');  
     my $i = 0;  
     my $temp=0;    
     my $id=$Apache::inputtags::response['-1'];  
     my $part=$Apache::inputtags::part;      my $part=$Apache::inputtags::part;
     my $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};      my $solved=$Apache::lonhomework::history{"resource.$part.solved"};
     my %lastresponse=&Apache::lonnet::str2hash($lastresponse);      if ( ($target ne 'tex') &&
     foreach my $name (@whichfoils) {   &Apache::response::show_answer() ) {
       if ($target ne 'tex') {   foreach my $name (@whichfoils) {
   $result.="<br /><input type=\"radio\" name=\"HWVAL_$Apache::inputtags::response['-1']\" value=\"$temp\" ";      if ($target ne 'tex') {
   if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }   $result.="<br />";
   $result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</input>\n";      } else {
       } else {   $result.='\item \vskip -2 mm  ';
   if ($Apache::lonhomework::type eq 'exam') {      }
       $result .= '{\small \textbf{'.$alphabet[$i].'}}$\bigcirc$'.$Apache::response::foilgroup{$name.'.text'}.'\\\\';  #' stupid emacs      if ($Apache::response::foilgroup{$name.'.value'} eq 'true') { 
       $i++;   if ($target ne 'tex') { $result.='Correct:<b>'; } else { $result.='Correct: \textbf{';}
   } else {      } else {
       $result .= '\vspace*{-2 mm}\item '.$Apache::response::foilgroup{$name.'.text'};   $result.='Incorrect:';
   }      }
       }      if ($target ne 'tex') {
       $temp++;   $result.=$Apache::response::foilgroup{$name.'.text'}."</input>\n";
     }      } else {
   }   $result.=$Apache::response::foilgroup{$name.'.text'};
   if ($target ne 'tex') { $result.="<br />"; } else { $result.='\vskip 0 mm '; }      }
   return $result;      if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
    if ($target ne 'tex') { $result.='</b>';} else {$result.='}';}
       }
    }
       } else {
    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);
    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'};
    }
       }
       $temp++;
    }
       }
       if ($target ne 'tex') { $result.="<br />"; } else { $result.='\vskip 0 mm '; }
       return $result;
   }
   
   sub displayallanswers {
       my @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 ($max,$randomize)=@_;
   my ($answer,@whichopt) = &whichfoils($max,$randomize);      my ($answer,@whichopt) = &whichfoils($max,$randomize);
   my $result=&Apache::response::answer_header('radiobuttonresponse');      my $result=&Apache::response::answer_header('radiobuttonresponse');
   foreach my $name (@whichopt) {      foreach my $name (@whichopt) {
     $result.=&Apache::response::answer_part('radiobuttonresponse',   $result.=&Apache::response::answer_part('radiobuttonresponse',
      $Apache::response::foilgroup{$name.'.value'})   $Apache::response::foilgroup{$name.'.value'})
   }   }
   $result.=&Apache::response::answer_footer('radiobuttonresponse');      $result.=&Apache::response::answer_footer('radiobuttonresponse');
   return $result;      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::radiobuttonresponse::conceptgroup=1;
   %Apache::response::conceptgroup=();      %Apache::response::conceptgroup=();
   my $result;      my $result;
   if ($target eq 'edit') {      if ($target eq 'edit') {
     $result.=&Apache::edit::tag_start($target,$token);   $result.=&Apache::edit::tag_start($target,$token);
     $result.=&Apache::edit::text_arg('Concept:','concept',$token,'50').   $result.=&Apache::edit::text_arg('Concept:','concept',$token,'50').
  &Apache::edit::end_row().&Apache::edit::start_spanning_row();      &Apache::edit::end_row().&Apache::edit::start_spanning_row();
   } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,   my $constructtag=&Apache::edit::get_new_args($token,$parstack,
  $safeeval,'concept');       $safeeval,'concept');
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }   if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
   }      }
   return $result;      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;
   my $result;      my $result;
   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'  || $target eq 'tex') {      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'  ||
     if (defined(@{ $Apache::response::conceptgroup{'names'} })) {   $target eq 'tex' || $target eq 'analyze') {
       my @names = @{ $Apache::response::conceptgroup{'names'} };   &Apache::response::pick_foil_for_concept($target,
       my $pick=int(&Math::Random::random_uniform() * ($#names+1));   ['value','text','location'],
       my $name=$names[$pick];   \%Apache::hint::radiobutton,
       push @{ $Apache::response::foilgroup{'names'} }, $name;   $parstack,$safeeval);
       $Apache::response::foilgroup{"$name.text"} =  $Apache::response::conceptgroup{"$name.text"};      } elsif ($target eq 'edit') {
       $Apache::response::foilgroup{"$name.value"} = $Apache::response::conceptgroup{"$name.value"};   $result=&Apache::edit::end_table();
       $Apache::response::foilgroup{"$name.location"} = $Apache::response::conceptgroup{"$name.location"};      }
       my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);      return $result;
       $Apache::response::foilgroup{"$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 {  sub insert_conceptgroup {
   my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";      my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";
   return $result;      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' || $target eq 'tex') {      if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
     &Apache::lonxml::startredirection;   &Apache::lonxml::startredirection;
   } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
     $result=&Apache::edit::tag_start($target,$token);   $result=&Apache::edit::tag_start($target,$token);
     $result.=&Apache::edit::text_arg('Name:','name',$token);   $result.=&Apache::edit::text_arg('Name:','name',$token);
     $result.=&Apache::edit::select_or_text_arg('Correct Option:','value',   $result.=&Apache::edit::select_or_text_arg('Correct Option:','value',
        ['unused','true','false'],$token);     ['unused','true','false'],
     my $randomize=&Apache::lonxml::get_param('randomize',$parstack,     $token);
      $safeeval,'-3');   my $randomize=&Apache::lonxml::get_param('randomize',$parstack,
     if ($randomize ne 'no') {   $safeeval,'-3');
       $result.=&Apache::edit::select_arg('Location:','location',   if ($randomize ne 'no') {
  ['random','top','bottom'],$token);      $result.=&Apache::edit::select_arg('Location:','location',
     }         ['random','top','bottom'],$token);
     $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();   }
   } elsif ($target eq 'modified') {   $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
      my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,      } elsif ($target eq 'modified') {
   'value','name','location');   my $constructtag=&Apache::edit::get_new_args($token,$parstack,
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }       $safeeval,'value','name',
   }        'location');
   return $result;   if ($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' || $target eq 'tex') { $text=&Apache::lonxml::endredirection; }      if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'  || $target eq 'tex') {   $text=&Apache::lonxml::endredirection;
     my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);      }
     if ($value ne 'unused') {      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'
       my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);   || $target eq 'tex' || $target eq 'analyze') {
       my $location =&Apache::lonxml::get_param('location',$parstack,$safeeval);   my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
       if (!$name) { $name=$Apache::lonxml::curdepth; }   if ($value ne 'unused') {
       if ( $Apache::radiobuttonresponse::conceptgroup      my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
    && !&Apache::response::showallfoils() ) {      if (!$name) { $name=$Apache::lonxml::curdepth; }
  push @{ $Apache::response::conceptgroup{'names'} }, $name;      if (defined($Apache::response::foilnames{$name})) {
  $Apache::response::conceptgroup{"$name.value"} = $value;   &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
  $Apache::response::conceptgroup{"$name.text"} = $text;      }
  $Apache::response::conceptgroup{"$name.location"} = $location;      $Apache::response::foilnames{$name}++;
       } else {      my $location =&Apache::lonxml::get_param('location',$parstack,
  push @{ $Apache::response::foilgroup{'names'} }, $name;       $safeeval);
  $Apache::response::foilgroup{"$name.value"} = $value;      if ( $Apache::radiobuttonresponse::conceptgroup
  $Apache::response::foilgroup{"$name.text"} = $text;   && !&Apache::response::showallfoils() ) {
  $Apache::response::foilgroup{"$name.location"} = $location;   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 />
Removed from v.1.75  
changed lines
  Added in v.1.88

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