Index: openacs-4/packages/dotlrn-ecommerce/lib/tree-chunk.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/dotlrn-ecommerce/lib/tree-chunk.tcl,v
diff -u -N -r1.79 -r1.80
--- openacs-4/packages/dotlrn-ecommerce/lib/tree-chunk.tcl	27 Apr 2006 21:49:15 -0000	1.79
+++ openacs-4/packages/dotlrn-ecommerce/lib/tree-chunk.tcl	12 May 2006 19:20:48 -0000	1.80
@@ -12,7 +12,7 @@
     instructor:optional
     { orderby course_name }
     { groupby course_name }
-    {show_hidden "f"}
+    show_hidden:optional
 
     {active_calendar_id 0}
     {all_sessions_p 0}
@@ -251,8 +251,14 @@
     set show_hidden f
     set hidden_filter_hide_p 1
 }
-lappend filters show_hidden [list hide_p $hidden_filter_hide_p label [_ dotlrn-ecommerce.Hidden_Courses] values { {[_ dotlrn-ecommerce.Show] t} {[_ dotlrn-ecommerce.Hide] f}} where_clause " (display_section_p <> :show_hidden or display_section_p is null or display_section_p = 't') "]
+lappend filters show_hidden [list hide_p $hidden_filter_hide_p label [_ dotlrn-ecommerce.Hidden_Courses] values { {[_ dotlrn-ecommerce.Show] t} } where_clause ""]
 
+if { ![exists_and_not_null show_hidden] } {
+    set show_hidden_not_exists_clause "and (display_section_p is null or display_section_p = 't')"
+} else {
+    set show_hidden_not_exists_clause ""
+}
+
 set actions [list]
 
 lappend actions "[_ dotlrn-ecommerce.View_All]" ? "[_ dotlrn-ecommerce.View_All]"
@@ -303,6 +309,7 @@
 	spacing {
 	    label ""
 	    display_template {
+
 	    }
 	    html { width 10% bgcolor=white }
 	}