--- loncom/interface/lonnavmaps.pm	2003/04/19 20:47:41	1.177
+++ loncom/interface/lonnavmaps.pm	2003/04/22 17:54:27	1.178
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.177 2003/04/19 20:47:41 www Exp $
+# $Id: lonnavmaps.pm,v 1.178 2003/04/22 17:54:27 bowersj2 Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -169,30 +169,34 @@ sub real_handler {
         return OK;
     }
 
-    # See if there's only one map in the top-level... if so,
-    # automatically display it
-    my $iterator = $navmap->getIterator(undef, undef, undef, 0);
-    my $depth = 1;
-    $iterator->next();
-    my $curRes = $iterator->next();
-    my $sequenceCount = 0;
-    my $sequenceId;
-    while ($depth > 0) {
-        if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
-        if ($curRes == $iterator->END_MAP()) { $depth--; }
-
-        if (ref($curRes) && $curRes->is_sequence()) {
-            $sequenceCount++;
-            $sequenceId = $curRes->map_pc();
+    # See if there's only one map in the top-level, if we don't
+    # already have a filter... if so, automatically display it
+    if (!defined($ENV{'form.filter'})) {
+        my $iterator = $navmap->getIterator(undef, undef, undef, 0);
+        my $depth = 1;
+        $iterator->next();
+        my $curRes = $iterator->next();
+        my $sequenceCount = 0;
+        my $sequenceId;
+        while ($depth > 0) {
+            if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
+            if ($curRes == $iterator->END_MAP()) { $depth--; }
+            
+            if (ref($curRes) && $curRes->is_sequence()) {
+                $sequenceCount++;
+                $sequenceId = $curRes->map_pc();
+        }
+            
+            $curRes = $iterator->next();
+        }
+        
+        if ($sequenceCount == 1) {
+            # The automatic iterator creation in the render call 
+            # will pick this up. We know the condition because
+            # the defined($ENV{'form.filter'}) also ensures this
+            # is a fresh call.
+            $ENV{'form.filter'} = "$sequenceId";
         }
-
-        $curRes = $iterator->next();
-    }
-
-    if ($sequenceCount == 1) {
-        # The automatic iterator creation in the render call 
-        # will pick this up.
-        $ENV{'form.filter'} = "$sequenceId";
     }
 
     # renderer call