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- untested but looking pretty good (no grading yet)

    1: # The LearningOnline Network with CAPA
    2: # iimage click response style
    3: 
    4: package Apache::imageresponse;
    5: use strict;
    6: 
    7: sub BEGIN {
    8:   &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
    9: }
   10: 
   11: sub start_imageresponse {
   12:   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
   13:   #when in a radiobutton response use these
   14:   &Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil','text','image','rectangle'));
   15:   my $id = &Apache::response::start_response($parstack,$safeeval);
   16:   return '';
   17: }
   18: 
   19: sub end_imageresponse {
   20:   &Apache::response::end_response;
   21:   return '';
   22: }
   23: 
   24: %Apache::response::foilgroup={};
   25: sub start_foilgroup {
   26:   %Apache::response::foilgroup={};
   27:   return '';
   28: }
   29: 
   30: sub setrandomnumber {
   31:   my $rndseed=&Apache::lonnet::rndseed();
   32:   $rndseed=unpack("%32i",$rndseed);
   33:   $rndseed=$rndseed
   34:     +&Apache::lonnet::numval($Apache::inputtags::part)
   35:       +&Apache::lonnet::numval($Apache::inputtags::response['-1']);
   36:   srand($rndseed);
   37:   return '';
   38: }
   39: 
   40: sub getfoilcounts {
   41:   my ($parstack,$safeeval)=@_;
   42:   my $rrargs ='';
   43:   if ( $#$parstack > 0 ) { $rrargs=$$parstack['-2']; }
   44:   my $max = &Apache::run::run("{$rrargs;".'return $max}',$safeeval);
   45:   my $count = $#{ $Apache::response::foilgroup{'names'} };
   46:   return ($count,$max);
   47: }
   48: 
   49: sub whichfoils {
   50:   my ($max)=@_;
   51:   my @names = @{ $Apache::response::foilgroup{'names'} };
   52:   my @whichopt =();
   53:   while ((($#whichopt+1) < $max) && ($#names > -1)) {
   54:     my $aopt=int rand $#names;
   55:     &Apache::lonxml::debug("From $#names elms, picking $aopt");
   56:     $aopt=splice(@names,$aopt,1);
   57:     &Apache::lonxml::debug("Picked $aopt");
   58:     push (@whichopt,$aopt);
   59:   }
   60:   return @whichopt;
   61: }
   62: 
   63: sub displayfoils {
   64:   my (@whichopt) = @_;
   65:   my $result ='';
   66:   #<input type=image name=timg0 src=/~walt/kap18/picts/ch1map.gif>
   67:   my $name;
   68:   my $temp=1;
   69:   foreach $name (@whichopt) {
   70:     $result.=$Apache::response::foilgroup{"$name.text"}."<br />\n";
   71:     my $image=$Apache::response::foilgroup{"$name.image"};
   72:     $result.="<input type=\"image\" name=\"HWVAL_$Apache::inputtags::response['-1']:$temp\" src=\"$image\"/> <br />\n";
   73:     $temp++;
   74:   }
   75:   return $result;
   76: }
   77: 
   78: sub end_foilgroup {
   79:   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
   80:   my $result='';
   81:   if ($target eq 'web' || $target eq 'grade') {
   82:     &setrandomnumber();
   83:     my ($count,$max) = &getfoilcounts($parstack,$safeeval);
   84:     if ($count>$max) { $count=$max }
   85:     &Apache::lonxml::debug("Count is $count from $max");
   86:     my @whichopt = &whichfoils($max);
   87:   }
   88:   if ($target eq 'web') {
   89:     $result=&displayfoils(@whichopt);
   90:   }
   91:   if ($target eq 'grade') {
   92:     &gradefoils(@whichopt);
   93:   }
   94:   return $result;
   95: }
   96: 
   97: sub start_conceptgroup {
   98: }
   99: 
  100: sub end_conceptgroup {
  101: }
  102: 
  103: $Apache::imageresponse::curname='';
  104: sub start_foil {
  105:   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  106:   if ($target eq 'web' || $target eq 'grade') {
  107:     my $args ='';
  108:     if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
  109:     my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);
  110:     push @{ $Apache::response::foilgroup{'names'} }, $name;
  111:     $Apache::imageresponse::curname=$name;
  112:   }
  113:   return '';
  114: }
  115: 
  116: sub end_foil {
  117:   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  118:   return '';
  119: }
  120: 
  121: sub start_text {
  122:   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  123:   if ($target eq 'web') { 
  124:     $Apache::lonxml::redirection--; 
  125:   }
  126:   return '';
  127: }
  128: 
  129: sub end_text {
  130:   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  131:   if ($target eq 'web') {
  132:     my $name = $Apache::imageresponse::curname;
  133:     $Apache::response::foilgroup{"$name.text"} = $Apache::lonxml::outputstack;
  134:     if ($target eq 'web' ) {
  135:       $Apache::lonxml::redirection++;
  136:       if ($Apache::lonxml::redirection == 1) { 
  137: 	$Apache::lonxml::outputstack=''; 
  138:       }
  139:     }
  140:   }
  141:   return '';
  142: }
  143: 
  144: sub start_image {
  145:   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  146:   if ($target eq 'web') { $Apache::lonxml::redirection--; }
  147:   return '';
  148: }
  149: 
  150: sub end_image {
  151:   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  152:   if ($target eq 'web') {
  153:     my $name = $Apache::imageresponse::curname;
  154:     $Apache::response::foilgroup{"$name.image"} = $Apache::lonxml::outputstack;
  155:     if ($target eq 'web' ) {
  156:       $Apache::lonxml::redirection++;
  157:       if ($Apache::lonxml::redirection == 1) {$Apache::lonxml::outputstack='';}
  158:     }
  159:   }
  160:   return '';
  161: }
  162: 
  163: sub start_rectangle {
  164:   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  165:   if ($target eq 'web') { $Apache::lonxml::redirection--; }
  166:   return '';
  167: }
  168: 
  169: sub end_rectangle {
  170:   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
  171:   if ($target eq 'web') {
  172:     my $name = $Apache::imageresponse::curname;
  173:     push ${ $Apache::response::foilgroup{"$name.area"}},"rectangle:$Apache::lonxml::outputstack";
  174:     if ($target eq 'web' ) {
  175:       $Apache::lonxml::redirection++;
  176:       if ($Apache::lonxml::redirection == 1) {$Apache::lonxml::outputstack='';}
  177:     }
  178:   }
  179: }
  180: 1;
  181: __END__
  182: