--- loncom/interface/statistics/lonstudentassessment.pm	2006/03/11 19:51:38	1.134
+++ loncom/interface/statistics/lonstudentassessment.pm	2010/02/12 15:11:08	1.150.2.4
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonstudentassessment.pm,v 1.134 2006/03/11 19:51:38 bowersj2 Exp $
+# $Id: lonstudentassessment.pm,v 1.150.2.4 2010/02/12 15:11:08 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -50,16 +50,20 @@ Presents assessment data about a student
 package Apache::lonstudentassessment;
 
 use strict;
-use Apache::lonstatistics;
-use Apache::lonhtmlcommon;
+use Apache::lonstatistics();
+use Apache::lonhtmlcommon();
 use Apache::loncommon();
 use Apache::loncoursedata;
 use Apache::lonnet; # for logging porpoises
 use Apache::lonlocal;
-use Apache::grades;
+use Apache::grades();
+use Apache::lonmsgdisplay();
 use Time::HiRes;
 use Spreadsheet::WriteExcel;
 use Spreadsheet::WriteExcel::Utility();
+use lib '/home/httpd/lib/perl/';
+use LONCAPA;
+ 
 
 #######################################################
 #######################################################
@@ -146,6 +150,7 @@ sub BuildStudentAssessmentPage {
                                'chartoutputmode' => 'scalar',
                                'chartoutputdata' => 'scalar',
                                'Section' => 'array',
+                               'Groups' => 'array',
                                'StudentData' => 'array',
                                'Maps' => 'array');
     &Apache::loncommon::store_course_settings('chart',\%Saveable_Parameters);
@@ -243,14 +248,14 @@ sub next_and_previous_buttons {
     if (defined($previous)) {
         my $sname = $previous->{'username'}.':'.$previous->{'domain'};
         $previousbutton .= '<input type="button" value="'.
-            'Previous Student ('.
-            $previous->{'username'}.'@'.$previous->{'domain'}.')'.
+            &mt('Previous Student ([_1])',
+            $previous->{'username'}.':'.$previous->{'domain'}).
             '" onclick="document.Statistics.SelectedStudent.value='.
             "'".$sname."'".';'.
             'document.Statistics.submit();" />';
     } else {
         $previousbutton .= '<input type="button" value="'.
-            'Previous student (none)'.'" />';
+            &mt('Previous student').'" disabled="disabled" />';
     }
     #
     # Build the next student link
@@ -259,19 +264,19 @@ sub next_and_previous_buttons {
     if (defined($next)) {
         my $sname = $next->{'username'}.':'.$next->{'domain'};
         $nextbutton .= '<input type="button" value="'.
-            'Next Student ('.
-            $next->{'username'}.'@'.$next->{'domain'}.')'.
+            &mt('Next Student ([_1])',
+            $next->{'username'}.':'.$next->{'domain'}).
             '" onclick="document.Statistics.SelectedStudent.value='.
-            "'".$sname."'".';'.
+            "'$sname'".';'.
             'document.Statistics.submit();" />';
     } else {
         $nextbutton .= '<input type="button" value="'.
-            'Next student (none)'.'" />';
+            &mt('Next student').'" disabled="disabled" />';
     }
     #
     # Build the 'all students' button
     my $all = '';
-    $all .= '<input type="button" value="All Students" '.
+    $all .= '<input type="button" value="'.&mt('All Students').'" '.
             '" onclick="document.Statistics.SelectedStudent.value='.
             "''".';'.'document.Statistics.submit();" />';
     $Str .= $previousbutton.('&nbsp;'x5).$all.('&nbsp;'x5).$nextbutton;
@@ -313,14 +318,24 @@ the chart page.
 #######################################################
 sub CreateInterface {
     my $Str = '';
-    $Str .= &Apache::lonhtmlcommon::breadcrumbs(undef,'Chart');
+    $Str .= &Apache::lonhtmlcommon::breadcrumbs('Chart','Chart_Description:Chart_Sections:Chart_Student_Data:Chart_Enrollment_Status:Chart_Sequences:Chart_Output_Formats:Chart_Output_Data');
 #    $Str .= &CreateLegend();
     $Str .= '<table cellspacing="5">'."\n";
     $Str .= '<tr>';
-    $Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>';
-    $Str .= '<td align="center"><b>'.&mt('Student Data</b>').'</td>';
-    $Str .= '<td align="center"><b>'.&mt('Enrollment Status').'</b></td>';
-    $Str .= '<td align="center"><b>'.&mt('Sequences and Folders').'</b></td>';
+    $Str .= '<td align="center"><b>'.&mt('Sections').'</b>'.
+	&Apache::loncommon::help_open_topic("Chart_Sections").
+	'</td>';
+    $Str .= '<td align="center"><b>'.&mt('Groups').'</b>'.
+	'</td>';
+    $Str .= '<td align="center"><b>'.&mt('Student Data').'</b>'.
+	&Apache::loncommon::help_open_topic("Chart_Student_Data").
+	'</td>';
+    $Str .= '<td align="center"><b>'.&mt('Access Status').'</b>'.
+	&Apache::loncommon::help_open_topic("Chart_Enrollment_Status").
+	'</td>';
+    $Str .= '<td align="center"><b>'.&mt('Sequences and Folders').'</b>'.
+	&Apache::loncommon::help_open_topic("Chart_Sequences").
+	'</td>';
     $Str .= '<td align="center"><b>'.&mt('Output Format').'</b>'.
         &Apache::loncommon::help_open_topic("Chart_Output_Formats").
         '</td>';
@@ -332,6 +347,8 @@ sub CreateInterface {
     $Str .= '<tr><td align="center">'."\n";
     $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
     $Str .= '</td><td align="center">';
+    $Str .= &Apache::lonstatistics::GroupSelect('Group','multiple',5);
+    $Str .= '</td><td align="center">';
     $Str .= &Apache::lonstatistics::StudentDataSelect('StudentData','multiple',
                                                       5,undef);
     $Str .= '</td><td>'."\n";
@@ -344,19 +361,20 @@ sub CreateInterface {
     $Str .= &CreateAndParseOutputDataSelector();
     $Str .= '</td></tr>'."\n";
     $Str .= '</table>'."\n";
-    $Str .= '<input type="submit" name="Generate Chart" value="'.
-        &mt('Generate Chart').'" />';
-    $Str .= '&nbsp;'x5;
+    $Str .= '<p>'.
+            &mt('Status:').' '.
+            '<input type="text" name="stats_status" size="60" value="" readonly="readonly" />'.
+            '</p>';
     $Str .= '<input type="submit" name="selectstudent" value="'.
         &mt('Select One Student').'" />';
     $Str .= '&nbsp;'x5;
     $Str .= '<input type="submit" name="ClearCache" value="'.
         &mt('Clear Caches').'" />';
-    $Str .= '&nbsp;'x5;
-    $Str .= 
-        &mt('Status [_1]',
-            '<input type="text" name="stats_status" size="60" value="" />');
-    $Str .= '<br />';
+    $Str .= '<p>'.
+            '<input type="submit" name="Generate Chart"'.
+            ' value="'.&mt('Generate Chart').'" />'.
+            '</p>';
+
     return $Str;
 }
 
@@ -529,7 +547,7 @@ my @OutputDataOptions =
        summary_table => 1,
        maximum_row => 0,
        ignore_weight => 1,
-       shortdesc => 'Number of Problem Parts completed successfully.',
+       shortdesc => 'Number of Problem Parts completed successfully',
        longdesc => 'The Number of Problem Parts completed successfully and '.
            'the maximum possible for each student',
        },
@@ -537,7 +555,8 @@ my @OutputDataOptions =
 
 sub HTMLifyOutputDataDescriptions {
     my $Str = '';
-    $Str .= "<h2>Output Data</h2>\n";
+    $Str .= '<h2>'.&mt('Output Data').'</h2>'."\n";
+
     $Str .= "<dl>\n";
     foreach my $option (@OutputDataOptions) {
         $Str .= '    <dt>'.$option->{'name'}.'</dt>';
@@ -646,27 +665,29 @@ sub html_initialize {
         &Apache::lonstatistics::selected_sequences_with_assessments();
     if (! ref($navmap)) {
         # Unable to get data, so bail out
-        $r->print("<h3>".
+        $r->print('<p class="LC_error">'.
                   &mt('Unable to retrieve course information.').
-                  '</h3>');
+                  '</p>');
     }
 
     # If we're showing links, show a checkbox to open in new
     # windows.
     if ($show_links ne 'no') {
+        my $labeltext = &mt('Show links in new window:');
         $r->print(<<NEW_WINDOW_CHECKBOX);
-<script>new_window = true;</script>
-<p>Show links in new window: 
-<input type="checkbox" checked="1" onclick="new_window=this.checked" /></p>
+<script type="text/javascript">new_window = true;</script>
+<p><label>$labeltext 
+<input type="checkbox" checked="checked" onclick="new_window=this.checked" />
+</label></p>
 NEW_WINDOW_CHECKBOX
     }
 
     #
     $r->print("<h3>".$env{'course.'.$env{'request.course.id'}.'.description'}.
-              "&nbsp;&nbsp;".localtime(time)."</h3>");
+              "&nbsp;&nbsp;".&Apache::lonlocal::locallocaltime(time)."</h3>");
     #
     if ($chosen_output->{'base'} !~ /^final table/) {
-        $r->print("<h3>".$chosen_output->{'shortdesc'}."</h3>");        
+        $r->print("<h3>".&mt($chosen_output->{'shortdesc'})."</h3>");        
     }
     my $Str = "<pre>\n";
     # First, the @StudentData fields need to be listed
@@ -732,7 +753,7 @@ NEW_WINDOW_CHECKBOX
     $r->rflush();
 
     $r->print(<<JS);
-<script>
+<script type="text/javascript">
 // get the left offset of a given widget as an absolute position
 function getLeftOffset (element) {
     return collect(element, "offsetLeft");
@@ -753,23 +774,20 @@ function collect(element, att) {
 }
 
 var currentDiv;
-var oldBorder;
 var currentElement;
 function popup_score(element, score) {
     popdown_score();
     var left = getLeftOffset(element);
     var top = getTopOffset(element);
     var div = document.createElement("div");
-    div.style.border = "1px solid #8888FF";
-    div.style.backgroundColor = "#CCCCFF";
+    div.className = "LC_chrt_popup";
     div.appendChild(document.createTextNode(score));
     div.style.position = "absolute";
     div.style.top = (top - 25) + "px";
     div.style.left = (left - 10) + "px";
     currentDiv = div;
     document.body.insertBefore(div, document.body.childNodes[0]);
-    oldBorder = element.style.border;
-    element.style.border = "1px solid yellow";
+    element.className = "LC_chrt_popup_up";
     currentElement = element;
 }
 
@@ -778,7 +796,7 @@ function popdown_score() {
         document.body.removeChild(currentDiv);
     }
     if (currentElement) {
-        currentElement.style.border = oldBorder;
+        currentElement.className = 'LC_chrt_popup_exists';
     }
     currentDiv = undefined;
 }
@@ -828,12 +846,20 @@ sub html_outputstudent {
     my @tmp = &Apache::loncoursedata::get_current_state
         ($student->{'username'},$student->{'domain'},undef,
          $env{'request.course.id'});
-    if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:/)) {
+    if ((scalar @tmp > 0) && ($tmp[0] !~ /^error:(.*)/)) {
         %StudentsData = @tmp;
-    }
-    if (scalar(@tmp) < 1) {
+    } else {
+	my $error = $1;
+	if (scalar(@tmp) < 1) {
+	    $Str .= '<span class="LC_warning">'
+                   .&mt('No Course Data')
+                   .'</span>'."\n";
+	} else {
+            $Str .= '<span class="LC_error">'
+                   .&mt('Error getting student data ([_1])',$error)
+                   .'</span>'."\n";
+	}
         $nodata_count++;
-        $Str .= '<font color="blue">No Course Data</font>'."\n";
         $r->print($Str);
         $r->rflush();
         return;
@@ -938,12 +964,12 @@ sub html_finish {
 
 sub StudentAverageTotal {
     my $Str = '<h3>'.&mt('Summary Tables').'</h3>'.$/;
-    $Str .= '<table border=2 cellspacing="1">'."\n";
-    $Str .= '<tr>'.
+    $Str .= &Apache::loncommon::start_data_table();
+    $Str .= &Apache::loncommon::start_data_table_header_row().
         '<th>'.&mt('Title').'</th>'.
         '<th>'.&mt('Average').'</th>'.
         '<th>'.&mt('Maximum').'</th>'.
-        '</tr>'.$/;
+        &Apache::loncommon::end_data_table_header_row().$/;
     foreach my $seq (@sequences) {
         my $symb = $seq->symb;
         my $ave;
@@ -957,46 +983,53 @@ sub StudentAverageTotal {
         }
         my $max = $Statistics->{$symb}->{'max'};
         $ave = sprintf("%.2f",$ave);
-        $Str .= '<tr><td>'.$seq->compTitle.'</td>'.
+        $Str .= &Apache::loncommon::start_data_table_row().
+            '<td>'.$seq->compTitle.'</td>'.
             '<td align="right">'.$ave.'&nbsp;</td>'.
-            '<td align="right">'.$max.'&nbsp;'.'</td></tr>'."\n";
+            '<td align="right">'.$max.'&nbsp;'.'</td>'.
+            &Apache::loncommon::end_data_table_row()."\n";
     }
-    $Str .= "</table>\n";
+    $Str .= &Apache::loncommon::end_data_table()."\n";
     return $Str;
 }
 
 sub SingleStudentTotal {
     return if (! defined($navmap));
     my $student = &Apache::lonstatistics::current_student();
-    my $Str = '<h3>'.&mt('Summary table for [_1] ([_2]@[_3])',
+    my $Str = '<h3>'.&mt('Summary table for [_1] ([_2])',
                          $student->{'fullname'},
-                         $student->{'username'},$student->{'domain'}).'</h3>';
+                         $student->{'username'}.':'.$student->{'domain'}).'</h3>';
     $Str .= $/;
-    $Str .= '<table border=2 cellspacing="1">'."\n";
+    $Str .= &Apache::loncommon::start_data_table()."\n";
     $Str .= 
-        '<tr>'.
+        &Apache::loncommon::start_data_table_header_row().
         '<th>'.&mt('Sequence or Folder').'</th>';
     if ($chosen_output->{'base'} eq 'tries') {
         $Str .= '<th>'.&mt('Parts Correct').'</th>';
     } else {
         $Str .= '<th>'.&mt('Score').'</th>';
     }
-    $Str .= '<th>'.&mt('Maximum').'</th>'."</tr>\n";
+    $Str .= '<th>'.&mt('Maximum').'</th>'.
+            &Apache::loncommon::end_data_table_header_row()."\n";
     my $total = 0;
     my $total_max = 0;
     foreach my $seq (@sequences) {
         my $value = $Statistics->{$seq->symb}->{'score'};
         my $max = $Statistics->{$seq->symb}->{'max'};
-        $Str .= '<tr><td>'.&HTML::Entities::encode($seq->compTitle).'</td>'.
+        $Str .= &Apache::loncommon::start_data_table_row().
+            '<td>'.&HTML::Entities::encode($seq->compTitle).'</td>'.
             '<td align="right">'.$value.'</td>'.
-                '<td align="right">'.$max.'</td></tr>'."\n";
+            '<td align="right">'.$max.'</td>'.
+            &Apache::loncommon::end_data_table_row()."\n";
         $total += $value;
         $total_max +=$max;
     }
-    $Str .= '<tr><td><b>'.&mt('Total').'</b></td>'.
+    $Str .= &Apache::loncommon::start_data_table_row().
+        '<td><b>'.&mt('Total').'</b></td>'.
         '<td align="right">'.$total.'</td>'.
-        '<td align="right">'.$total_max."</td></tr>\n";
-    $Str .= "</table>\n";
+        '<td align="right">'.$total_max.'</td>'.
+        &Apache::loncommon::end_data_table_row()."\n";
+    $Str .= &Apache::loncommon::end_data_table()."\n";
     return $Str;
 }
 
@@ -1146,11 +1179,11 @@ sub excel_initialize {
     #
     # Put the date in there too
     $excel_sheet->write($header_row,$cols_output++,
-                        'Compiled on '.localtime(time),$format->{'h3'});
+                        &mt('Compiled on [_1]',&Apache::lonlocal::locallocaltime(time)),$format->{'h3'});
     #
     $cols_output = 0;
     $excel_sheet->write($description_row,$cols_output++,
-                        $chosen_output->{'shortdesc'},
+                        &mt($chosen_output->{'shortdesc'}),
                         $format->{'b'});
     #
     $cols_output = 0;
@@ -1228,17 +1261,17 @@ sub excel_initialize {
         $formula_data{$symb}->{'Excel:scorecol'}=$cols_output;
         if ($chosen_output->{'base'} eq 'parts correct total') {
             $excel_sheet->write($resource_name_row,$cols_output++,
-                                'parts correct',
+                                &mt('parts correct'),
                                 $format->{'bold'});
         } elsif ($chosen_output->{'sequence_sum'}) {
             if ($chosen_output->{'correct'}) {
                 # Only reporting the number correct, so do not call it score
                 $excel_sheet->write($resource_name_row,$cols_output++,
-                                    'sum',
+                                    &mt('sum'),
                                     $format->{'bold'});
             } else {
                 $excel_sheet->write($resource_name_row,$cols_output++,
-                                    'score',
+                                    &mt('score'),
                                     $format->{'bold'});
             }
         }
@@ -1248,7 +1281,7 @@ sub excel_initialize {
             ($first_data_row,$cols_output-1);
         if ($chosen_output->{'sequence_max'}) {
             $excel_sheet->write($resource_name_row,$cols_output,
-                                'maximum',
+                                &mt('maximum'),
                                 $format->{'bold'});
             $formula_data{$symb}->{'Excel:maxcell'} = 
                 &Spreadsheet::WriteExcel::Utility::xl_rowcol_to_cell
@@ -1262,11 +1295,11 @@ sub excel_initialize {
         }
     }
     if ($chosen_output->{'grand_total'}) {
-        $excel_sheet->write($resource_name_row,$cols_output++,'Total',
+        $excel_sheet->write($resource_name_row,$cols_output++,&mt('Total'),
                             $format->{'bold'});
     }
     if ($chosen_output->{'grand_maximum'}) {
-        $excel_sheet->write($resource_name_row,$cols_output++,'Max. Total',
+        $excel_sheet->write($resource_name_row,$cols_output++,&mt('Max. Total'),
                             $format->{'bold'});
     }
     $total_formula = $excel_sheet->store_formula($total_formula_string);
@@ -1357,17 +1390,17 @@ sub excel_initialize {
     if ($chosen_output->{'summary_table'}) {
         $cols_output = 0;
         $excel_sheet->write($summary_header_row,$cols_output++,
-                            'Summary Table',$format->{'bold'});
+                            &mt('Summary Table'),$format->{'bold'});
         if ($chosen_output->{'maximum_row'}) {
             $excel_sheet->write($summary_header_row,$cols_output++,
-                                'Maximum',$format->{'bold'});
+                                &mt('Maximum'),$format->{'bold'});
         }
         $excel_sheet->write($summary_header_row,$cols_output++,
-                            'Average',$format->{'bold'});
+                            &mt('Average'),$format->{'bold'});
         $excel_sheet->write($summary_header_row,$cols_output++,
-                            'Median',$format->{'bold'});
+                            &mt('Median'),$format->{'bold'});
         $excel_sheet->write($summary_header_row,$cols_output++,
-                            'Std Dev',$format->{'bold'});
+                            &mt('Std Dev'),$format->{'bold'});
         my $row = $summary_header_row+1;
         foreach my $seq (@sequences) {
             my $symb = $seq->symb;
@@ -1407,14 +1440,10 @@ sub excel_initialize {
     if ($env{'form.SelectedStudent'}) {
         $studentcount = '1';
     }
-    if ($studentcount > 1) {
-        $r->print('<h1>'.&mt('Compiling Excel spreadsheet for [_1] students',
-                             $studentcount)."</h1>\n");
-    } else {
-        $r->print('<h1>'.
-                  &mt('Compiling Excel spreadsheet for 1 student').
-                  "</h1>\n");
-    }
+    $r->print('<p>'
+             .&mt('Compiling Excel spreadsheet for [quant,_1,student]...',$studentcount)
+            ."</p>\n"
+    );
     $r->rflush();
     #
     # Initialize progress window
@@ -1440,7 +1469,7 @@ sub excel_outputstudent {
     foreach my $field (@to_show) {
         my $value = $student->{$field};
         if ($field eq 'comments') {
-            $value = &Apache::lonmsg::retrieve_instructor_comments
+            $value = &Apache::lonmsgdisplay::retrieve_instructor_comments
                 ($student->{'username'},$student->{'domain'});
         }
         $excel_sheet->write($rows_output,$cols_output++,$value);
@@ -1562,7 +1591,7 @@ sub excel_finish {
     #
     # Tell the user where to get their excel file
     $r->print('<br />'.
-              '<a href="'.$filename.'">Your Excel spreadsheet.</a>'."\n");
+              '<a href="'.$filename.'">'.&mt('Your Excel spreadsheet').'</a>'."\n");
     $r->rflush();
     &excel_cleanup();
     return;
@@ -1685,23 +1714,23 @@ END
         $sequence_row.='"",'x$count;
         if ($chosen_output->{'sequence_sum'}) {
             if($chosen_output->{'correct'}) {
-                $resource_row .= '"sum",';
+                $resource_row .= '"'.&mt('sum').'",';
             } else {
-                $resource_row .= '"score",';
+                $resource_row .= '"'.&mt('score').'",';
             }
         }
         if ($chosen_output->{'sequence_max'}) {
             $sequence_row.= '"",';
-            $resource_row .= '"maximum possible",';
+            $resource_row .= '"'.&mt('maximum possible').'",';
         }
     }
     if ($chosen_output->{'grand_total'}) {
         $sequence_row.= '"",';
-        $resource_row.= '"Total",';
+        $resource_row.= '"'.&mt('Total').'",';
     } 
     if ($chosen_output->{'grand_maximum'}) {
         $sequence_row.= '"",';
-        $resource_row.= '"Maximum",';
+        $resource_row.= '"'.&mt('Maximum').'",';
     } 
     chomp($sequence_row);
     chomp($resource_row);
@@ -1722,7 +1751,7 @@ sub csv_outputstudent {
     foreach my $field (@to_show) {
         my $value = $student->{$field};
         if ($field eq 'comments') {
-            $value = &Apache::lonmsg::retrieve_instructor_comments
+            $value = &Apache::lonmsgdisplay::retrieve_instructor_comments
                 ($student->{'username'},$student->{'domain'});
         }        
         $Str .= '"'.&Apache::loncommon::csv_translate($value).'",';
@@ -1805,7 +1834,7 @@ sub csv_finish {
     #
     # Tell the user where to get their csv file
     $r->print('<br />'.
-              '<a href="'.$filename.'">'.&mt('Your csv file.').'</a>'."\n");
+              '<a href="'.$filename.'">'.&mt('Your CSV file.').'</a>'."\n");
     $r->rflush();
     &csv_cleanup();
     return;
@@ -1823,7 +1852,7 @@ sub show_star {
     # Escape the popup for JS.
     $popup =~ s/([^-a-zA-Z0-9:;,._ ()|!\/?=&*])/'\\' . sprintf("%lo", ord($1))/ge;
     
-    return "<span onmouseover='popup_score(this, \"$popup\");return false;' onmouseout='popdown_score();return false;' style='border: 1px solid #339933; margin: -1px;'>$symbol</span>";
+    return "<span class=\"LC_chrt_popup_exists\" onmouseover='popup_score(this, \"$popup\");return false;' onmouseout='popdown_score();return false;'>$symbol</span>";
 }
 
 #######################################################
@@ -1891,7 +1920,7 @@ sub student_tries_on_sequence {
                 if ($status eq 'excused') {
                     $symbol = 'x';
                     $max--;
-                } elsif ($status eq 'correct_by_override') {
+                } elsif ($status eq 'correct_by_override' && !$resource->is_task()) {
                     $symbol = '+';
                     $sum++;
                 } elsif ($tries > 0) {
@@ -1936,11 +1965,8 @@ sub student_tries_on_sequence {
             #
             if ( ($links eq 'yes' && $symbol ne ' ') ||
                  ($links eq 'all')) {
-                if (length($symbol) > 1) {
-                    &Apache::lonnet::logthis('length of symbol "'.$symbol.'" > 1');
-                }
                 my $link = '/adm/grades'.
-                    '?symb='.&Apache::lonnet::escape($resource->symb).
+                    '?symb='.&escape($resource->shown_symb).
                         '&student='.$student->{'username'}.
                             '&userdom='.$student->{'domain'}.
                                 '&command=submission';
@@ -2095,7 +2121,7 @@ sub student_performance_on_sequence {
             #
             if ( ($links eq 'yes' && $symbol ne ' ') || ($links eq 'all')) {
                 my $link = '/adm/grades' .
-                    '?symb='.&Apache::lonnet::escape($symb).
+                    '?symb='.&escape($resource->shown_symb).
                     '&student='.$student->{'username'}.
                     '&userdom='.$student->{'domain'}.
                     '&command=submission';