Index: work/gtk/layersel/layersel.c
===================================================================
--- work/gtk/layersel/layersel.c	(revision 8517)
+++ work/gtk/layersel/layersel.c	(revision 8518)
@@ -63,6 +63,23 @@
 	return image;
 }
 
+/*** Sync ***/
+static void group_vis_sync(layersel_grp_t *lsg)
+{
+	if (lsg->on) {
+		pcb_gtk_widget_hide_all(lsg->grp_closed);
+		gtk_widget_set_no_show_all(lsg->grp_open, 0);
+		gtk_widget_show_all(lsg->grp_open);
+		gtk_widget_set_no_show_all(lsg->grp_open, 1);
+	}
+	else {
+		gtk_widget_set_no_show_all(lsg->grp_closed, 0);
+		gtk_widget_show_all(lsg->grp_closed);
+		gtk_widget_set_no_show_all(lsg->grp_closed, 1);
+		pcb_gtk_widget_hide_all(lsg->grp_open);
+	}
+}
+
 /*** Event handling ***/
 
 static gboolean layer_vis_press_cb(GtkWidget *widget, GdkEvent *event, gpointer user_data)
@@ -72,6 +89,22 @@
 	return TRUE;
 }
 
+static gboolean group_close_press_cb(GtkWidget *widget, GdkEvent *event, layersel_grp_t *lsg)
+{
+	lsg->on = 0;
+	group_vis_sync(lsg);
+	printf("close!\n");
+	return TRUE;
+}
+
+static gboolean group_open_press_cb(GtkWidget *widget, GdkEvent *event, layersel_grp_t *lsg)
+{
+	lsg->on = 1;
+	group_vis_sync(lsg);
+	printf("open!\n");
+	return TRUE;
+}
+
 /** Wrap w so that clicks on it are triggering a callback */
 static GtkWidget *wrap_bind_click(GtkWidget *w, GCallback cb, void *cb_data)
 {
@@ -85,7 +118,7 @@
 
 static GtkWidget *build_grp(pcb_gtk_layersel_t *ls, layersel_grp_t *lsg, const char *gname)
 {
-	GtkWidget *gn_vert, *grp_layers, *vlabel, *spring, *vis_box, *vis_ebox;
+	GtkWidget *gn_vert, *grp_layers, *vlabel, *spring, *vis_box, *vis_ebox, *opn, *cld;
 	int n;
 	char tmp[32];
 
@@ -101,6 +134,7 @@
   |+-----------------------+ |
   +--------------------------+
 */
+	lsg->ls = ls;
 	lsg->grp_row = gtkc_vbox_new(0, 0);
 	lsg->grp_closed = gtkc_hbox_new(0, 0);
 	lsg->grp_open = gtkc_hbox_new(0, 0);
@@ -109,7 +143,8 @@
 
 	gn_vert = gtkc_vbox_new(0, 0);
 	grp_layers = gtkc_vbox_new(0, 0);
-	gtk_box_pack_start(GTK_BOX(lsg->grp_open), gn_vert, FALSE, FALSE, 0);
+	opn = wrap_bind_click(gn_vert, G_CALLBACK(group_close_press_cb), lsg);
+	gtk_box_pack_start(GTK_BOX(lsg->grp_open), opn, FALSE, FALSE, 0);
 	gtk_box_pack_start(GTK_BOX(lsg->grp_open), grp_layers, FALSE, FALSE, 0);
 
 
@@ -120,7 +155,8 @@
 	gtk_misc_set_alignment(GTK_MISC(vlabel), 0, 1);
 	gtk_widget_set_size_request(vlabel, 32, 1);
 
-	gtk_box_pack_start(GTK_BOX(lsg->grp_closed), gtk_label_new(gname), FALSE, FALSE, 0);
+	cld = wrap_bind_click(gtk_label_new(gname), G_CALLBACK(group_open_press_cb), lsg);
+	gtk_box_pack_start(GTK_BOX(lsg->grp_closed), cld, FALSE, FALSE, 0);
 
 	/* install layers */
 	for(n = 0; n < 4; n++) {
@@ -146,12 +182,10 @@
 	}
 
 	/* Make sure gtk_show_all() won't mess with our hardwired hide/show */
-	gtk_widget_show_all(lsg->grp_closed);
-	gtk_widget_show_all(lsg->grp_open);
+	group_vis_sync(lsg);
 	gtk_widget_set_no_show_all(lsg->grp_closed, 1);
 	gtk_widget_set_no_show_all(lsg->grp_open, 1);
 
-	lsg->ls = ls;
 	return lsg->grp_row;
 }
 
Index: work/gtk/layersel/layersel.h
===================================================================
--- work/gtk/layersel/layersel.h	(revision 8517)
+++ work/gtk/layersel/layersel.h	(revision 8518)
@@ -19,6 +19,8 @@
 
 	layersel_layer_t layer[4];
 
+	unsigned on:1;
+
 	/* for callbacks */
 	pcb_gtk_layersel_t *ls;  /* points to parent */
 };
Index: work/gtk/layersel/layersel_demo.c
===================================================================
--- work/gtk/layersel/layersel_demo.c	(revision 8517)
+++ work/gtk/layersel/layersel_demo.c	(revision 8518)
@@ -1,4 +1,5 @@
 #include <gtk/gtk.h>
+#include <string.h>
 
 #include "layersel.h"
 #include "lib_gtk_common/compat.h"
@@ -9,6 +10,8 @@
 	GtkWidget *layer_selector;
 	pcb_gtk_layersel_t ls;
 
+	memset(&ls, 0, sizeof(ls));
+
 	/* Initialize the widget set */
 	gtk_init(&argc, &argv);
 	/* Create the main window */