gfio: enable tree view grid lines

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/gfio.c b/gfio.c
index f09e241..0d18ef6 100644
--- a/gfio.c
+++ b/gfio.c
@@ -258,6 +258,8 @@
 
 	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree_view));
 	gtk_tree_selection_set_mode(GTK_TREE_SELECTION(selection), GTK_SELECTION_BROWSE);
+	g_object_set(G_OBJECT(tree_view), "headers-visible", TRUE,
+		"enable-grid-lines", GTK_TREE_VIEW_GRID_LINES_BOTH, NULL);
 
 	tree_view_column(tree_view, 0, "Time", ALIGN_RIGHT | UNSORTABLE);
 	tree_view_column(tree_view, 1, "Host", ALIGN_RIGHT | UNSORTABLE);
@@ -289,6 +291,9 @@
 	tree_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
 	gtk_widget_set_can_focus(tree_view, FALSE);
 
+	g_object_set(G_OBJECT(tree_view), "headers-visible", TRUE,
+		"enable-grid-lines", GTK_TREE_VIEW_GRID_LINES_BOTH, NULL);
+
 	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree_view));
 	gtk_tree_selection_set_mode(GTK_TREE_SELECTION(selection), GTK_SELECTION_BROWSE);
 
@@ -543,6 +548,9 @@
 	tree_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
 	gtk_widget_set_can_focus(tree_view, FALSE);
 
+	g_object_set(G_OBJECT(tree_view), "headers-visible", TRUE,
+		"enable-grid-lines", GTK_TREE_VIEW_GRID_LINES_BOTH, NULL);
+
 	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree_view));
 	gtk_tree_selection_set_mode(GTK_TREE_SELECTION(selection), GTK_SELECTION_BROWSE);
 
@@ -725,6 +733,9 @@
 	tree_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(model));
 	gtk_widget_set_can_focus(tree_view, FALSE);
 
+	g_object_set(G_OBJECT(tree_view), "headers-visible", TRUE,
+		"enable-grid-lines", GTK_TREE_VIEW_GRID_LINES_BOTH, NULL);
+
 	selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree_view));
 	gtk_tree_selection_set_mode(GTK_TREE_SELECTION(selection), GTK_SELECTION_BROWSE);