--- loncom/homework/optionresponse.pm	2008/12/10 21:48:21	1.157
+++ loncom/homework/optionresponse.pm	2010/02/05 15:34:02	1.159
@@ -1,7 +1,7 @@
 # LearningOnline Network with CAPA
 # option list style responses
 #
-# $Id: optionresponse.pm,v 1.157 2008/12/10 21:48:21 raeburn Exp $
+# $Id: optionresponse.pm,v 1.159 2010/02/05 15:34:02 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -439,7 +439,8 @@ sub displayfoils {
       my $lastopt=$lastresponse{$name};
       my $optionlist="<option></option>\n";
 
-      if($target eq 'tex' and $env{'form.pdfFormFields'} eq 'yes') {
+      if($target eq 'tex' and $env{'form.pdfFormFields'} eq 'yes'
+         && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
           my $fieldname = $env{'request.symb'}.'&part_'.$Apache::inputtags::part.'&optionresponse'.'&HWVAL_'.$Apache::inputtags::response['-1'].':'.$temp;
           $optionlist =  &Apache::lonxml::print_pdf_start_combobox($fieldname);
       }
@@ -447,25 +448,54 @@ sub displayfoils {
       foreach my $option (@opt) {
 	  my $escopt=&HTML::Entities::encode($option,'\'"&<>');
           if ($option eq $lastopt) {
-              if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes') {
+              if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes'
+                  && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                   $optionlist .= &Apache::lonxml::print_pdf_add_combobox_option($option);
               } else {
                   $optionlist.="<option value='".$escopt."' selected=\"selected\">$option</option>\n";
               }
           } else {
-              if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes') {
+              if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes'
+                  && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                   $optionlist .= &Apache::lonxml::print_pdf_add_combobox_option($option);
               } else {
                   $optionlist.="<option value='".$escopt."'>$option</option>\n";
               }
           }
       }
+# debug for checkbox
+      my $checkboxopt='';
+# end debug for checkbox
       if ($target ne 'tex') {
 	  if ($Apache::lonhomework::type ne 'exam') {
-	      $optionlist='<select onchange="javascript:setSubmittedPart(\''.
+# we are on the web, this is not an exam, and the problem can be answered
+              if ($checkboxopt) {
+# generate checkboxes
+                  my $fieldname=$Apache::inputtags::response['-1'].':'.$temp;
+                  my $altopt=$opt[0];
+                  if ($opt[0] eq $checkboxopt) {
+                     $altopt=$opt[1];
+                  }
+                  my $defopt=$lastopt;
+                  unless ($defopt) { $defopt=$altopt; }
+                  my $escdefopt=&HTML::Entities::encode($defopt,'\'"&<>');
+                  my $esccheckboxopt=&HTML::Entities::encode($checkboxopt,'\'"&<>');
+                  my $escaltopt=&HTML::Entities::encode($altopt,'\'"&<>');
+# checkboxopt is how the box is labelled
+# altopt is the alternative option
+# lastopt is what the user submitted before
+# defopt is what the field is going to start out with: either previous choice or altopt
+# fieldname is this input field's name after HWVAL_
+                  $optionlist='<input type="hidden" name="HWVAL_'.$fieldname.'" value="'.$escdefopt.'" />'.
+                  '<label><input type="checkbox" name="HWCHK_'.$fieldname.'" onclick="javascript:if (this.form.elements[\'HWCHK_'.
+                  $fieldname.'\'].checked) { this.form.elements[\'HWVAL_'.$fieldname.'\'].value=\''.$esccheckboxopt.'\'; } else { this.form.elements[\'HWVAL_'.$fieldname.'\'].value=\''.$escaltopt.'\'; };setSubmittedPart(\''.$part.'\');"'.($defopt eq $checkboxopt?' checked="checked"':'').' /><i>'.$checkboxopt.":</i></label>\n";
+              } else {
+# classic selection list
+	          $optionlist='<select onchange="javascript:setSubmittedPart(\''.
 		  $part.'\');" name="HWVAL_'.
 		  $Apache::inputtags::response['-1'].':'.$temp.'">'.
 		  $optionlist."</select>\n";
+              }
 	  } else {
 	      $optionlist='<u>'.('&nbsp;'x10).'</u>';
 	  }
@@ -516,9 +546,9 @@ sub displayfoils {
 		  '\end{enumerate} \vskip -8 mm \strut ';
 	      $internal_counter++;
 	  }
-          if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes') {
-              $text =~ s/.*indent(.*)$/$1/;
-              $text = $1;
+          if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes'
+              && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
+              $text =~ s/\\item//m;
               $result .= " $optionlist ". &Apache::lonxml::print_pdf_end_combobox($text).'\strut \\\\';
               $temp++;
           }