--- loncom/interface/statistics/lonstathelpers.pm	2020/08/31 14:36:19	1.77
+++ loncom/interface/statistics/lonstathelpers.pm	2020/09/12 20:21:30	1.79
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonstathelpers.pm,v 1.77 2020/08/31 14:36:19 raeburn Exp $
+# $Id: lonstathelpers.pm,v 1.79 2020/09/12 20:21:30 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -188,7 +188,7 @@ sub problem_selector {
                     $rowspan = ' rowspan="'.$totalresps.'"';
                 }
                 $seq_str .= &Apache::loncommon::start_data_table_row().
-                            '<td'.$rowspan.' style="vertical-align:middle">'.
+                            '<td'.$rowspan.' style="vertical-align:top">'.
                             '<label><input type="radio" name="symb" value="'.$value.'"'.$checked.' />'.
                             $title.'</label>';
                 my $link = $res->link.'?symb='.&escape($res->shown_symb);
@@ -210,7 +210,9 @@ sub problem_selector {
                     my $resptype = $response_types[$i];
                     if ($resptype =~ m/$AcceptedResponseTypes/) {
                         if ($byres) {
-                            unless (exists($partsseen{$part})) {
+                            if (exists($partsseen{$part})) {
+                                $seq_str .= &Apache::loncommon::continue_data_table_row();
+                            } else {
                                 my $parttitle = $part;
                                 if ($part eq '0') {
                                     $parttitle = '';
@@ -222,7 +224,11 @@ sub problem_selector {
                                     $seq_str .= &Apache::loncommon::continue_data_table_row();
                                 }
                                 unless ($partsseen{$part}) {
-                                    $seq_str .= '<td rowspan="'.scalar(@response_ids).'" style="vertical-align:middle">'.
+                                    my $resprowspan;
+                                    if (scalar(@response_ids) > 1) {
+                                        $resprowspan = ' rowspan="'.scalar(@response_ids).'"';
+                                    }
+                                    $seq_str .= '<td'.$resprowspan.' style="vertical-align:top">'.
                                                 $parttitle.'</td>';
                                     $partsseen{$part} = scalar(@response_ids);
                                 }
@@ -256,8 +262,8 @@ sub problem_selector {
                             $seq_str .= ('&nbsp;'x2).
                                         '<a target="preview" href="'.$link.'">'.&mt('view').'</a>';
                             $seq_str .= "</td>". &Apache::loncommon::end_data_table_row()."\n";
-                            $rb_count++;
                         }
+                        $rb_count++;
                     }
                 }
             }
@@ -284,6 +290,15 @@ sub problem_selector {
         }
     }
     $Str .= &Apache::loncommon::end_data_table().&Apache::loncommon::end_scrollbox()."\n";
+    if (!$rb_count) {
+        if ($byres) {
+            $Str = '<p class="LC_info">'.&mt('No gradable problems found').'</p>';
+        } elsif ($AcceptedResponseTypes eq '.') {
+            $Str = '<p class="LC_info">'.&mt('No problems found').'</p>';
+        } else {
+            $Str = '<p class="LC_info">'.&mt('No analyzable problems found').'</p>';
+        }
+    }
     return $Str;
 }