If the sort_info can't group, hide the grouping button and label.

2001-08-10  Christopher James Lahey  <clahey@ximian.com>

	* e-table-config.c (setup_gui): If the sort_info can't group, hide
	the grouping button and label.

	* e-table-header-item.c (ethi_header_context_menu): Removed the
	Group By This Field menu item if the sort_info doesn't support
	grouping.

	* e-table-sort-info.c, e-table-sort-info.h
	(e_table_sort_info_get_can_group,
	e_table_sort_info_set_can_group): Added these functions.

	* e-tree.c (e_tree_set_state_object, et_real_construct): Set
	can_group to FALSE for all our sort infos.
	(e_tree_get_state_object): Fixed a potential gtk_object_ref (NULL)
	here.

svn path=/trunk/; revision=11896

1 files changed, 23 insertions, 2 deletions

diff --git a/widgets/table/e-table-sort-info.c b/widgets/table/e-table-sort-info.c
index 32477cbf4b..ed10e6c73b 100644
--- a/widgets/table/e-table-sort-info.c
+++ b/widgets/table/e-table-sort-info.c
@@ -59,6 +59,7 @@ e_table_sort_info_init (ETableSortInfo *info)
 	info->frozen = 0;
 	info->sort_info_changed = 0;
 	info->group_info_changed = 0;
+	info->can_group = 1;
 }
 
 static void
@@ -179,7 +180,10 @@ e_table_sort_info_thaw               (ETableSortInfo *info)
 guint
 e_table_sort_info_grouping_get_count (ETableSortInfo *info)
 {
-	return info->group_count;
+	if (info->can_group)
+		return info->group_count;
+	else
+		return 0;
 }
 
 static void
@@ -219,7 +223,7 @@ e_table_sort_info_grouping_truncate  (ETableSortInfo *info, int length)
 ETableSortColumn
 e_table_sort_info_grouping_get_nth   (ETableSortInfo *info, int n)
 {
-	if (n < info->group_count) {
+	if (info->can_group && n < info->group_count) {
 		return info->groupings[n];
 	} else {
 		ETableSortColumn fake = {0, 0};
@@ -450,5 +454,22 @@ e_table_sort_info_duplicate (ETableSortInfo *info)
 	new_info->sortings = g_new(ETableSortColumn, new_info->sort_count);
 	memmove(new_info->sortings, info->sortings, sizeof (ETableSortColumn) * new_info->sort_count);
 
+	new_info->can_group = info->can_group;
+
 	return new_info;
 }
+
+void
+e_table_sort_info_set_can_group       (ETableSortInfo   *info,
+				       gboolean          can_group)
+{
+	info->can_group = can_group;
+}
+
+gboolean
+e_table_sort_info_get_can_group       (ETableSortInfo   *info)
+{
+	return info->can_group;
+}
+
+