Index: line_of_vias.c
===================================================================
--- line_of_vias.c	(revision 28719)
+++ line_of_vias.c	(revision 28720)
@@ -29,8 +29,23 @@
 typedef struct {
 	pcb_coord_t pitch;
 	pcb_coord_t clearance;
+
+	/* cached */
+	pcb_coord_t x1, y1, x2, y2;
+	double len, dx, dy;
 } line_of_vias;
 
+static void line_of_vias_udpate_line(line_of_vias *lov, pcb_line_t *line)
+{
+	lov->x1 = line->Point1.X;
+	lov->y1 = line->Point1.Y;
+	lov->x2 = line->Point2.X;
+	lov->y2 = line->Point2.Y;
+	lov->len = pcb_distance(line->Point1.X, line->Point1.Y, line->Point2.X, line->Point2.Y);
+	lov->dx = (double)(line->Point2.X - line->Point1.X) / lov->len;
+	lov->dy = (double)(line->Point2.Y - line->Point1.Y) / lov->len;
+}
+
 static void line_of_vias_unpack(pcb_subc_t *obj)
 {
 	line_of_vias *lov;
@@ -37,6 +52,7 @@
 	const char *s;
 	double v;
 	pcb_bool succ;
+	pcb_any_obj_t *edit;
 
 	if (obj->extobj_data == NULL)
 		obj->extobj_data = calloc(sizeof(line_of_vias), 1);
@@ -54,6 +70,11 @@
 		v = pcb_get_value(s, NULL, NULL, &succ);
 		if (succ) lov->clearance = v;
 	}
+
+
+	edit = pcb_extobj_get_editobj_by_attr(obj);
+	if ((edit != NULL) && (edit->type == PCB_OBJ_LINE))
+		line_of_vias_udpate_line(lov, (pcb_line_t *)edit);
 }
 
 /* remove all existing padstacks from the subc */
@@ -69,7 +90,7 @@
 /* create all new padstacks */
 static int line_of_vias_gen(pcb_subc_t *subc, pcb_any_obj_t *edit_obj)
 {
-	double offs, len, dx, dy, x, y, pitch;
+	double offs, x, y, pitch;
 	line_of_vias *lov;
 	pcb_line_t *line = (pcb_line_t *)edit_obj;
 	pcb_data_t *data = subc->parent.data;
@@ -80,21 +101,19 @@
 	if (subc->extobj_data == NULL)
 		line_of_vias_unpack(subc);
 	lov = subc->extobj_data;
+	line_of_vias_udpate_line(lov, line);
 
 	if (data->subc_tree != NULL)
 		pcb_r_delete_entry(data->subc_tree, (pcb_box_t *)subc);
 	pcb_undo_freeze_add();
 
-	len = pcb_distance(line->Point1.X, line->Point1.Y, line->Point2.X, line->Point2.Y);
-	dx = (double)(line->Point2.X - line->Point1.X) / len;
-	dy = (double)(line->Point2.Y - line->Point1.Y) / len;
 	x = line->Point1.X;
 	y = line->Point1.Y;
 	pitch = lov->pitch;
-	for(offs = 0; offs <= len; offs += pitch) {
+	for(offs = 0; offs <= lov->len; offs += pitch) {
 		pcb_pstk_new(subc->data, -1, 0, pcb_round(x), pcb_round(y), lov->clearance, pcb_flag_make(PCB_FLAG_CLEARLINE));
-		x += dx * pitch;
-		y += dy * pitch;
+		x += lov->dx * pitch;
+		y += lov->dy * pitch;
 	}
 
 	pcb_undo_unfreeze_add();
@@ -106,6 +125,35 @@
 }
 
 
+static void pcb_line_of_vias_draw_mark(pcb_draw_info_t *info, pcb_subc_t *subc)
+{
+	int selected = PCB_FLAG_TEST(PCB_FLAG_SELECTED, subc);
+	line_of_vias *lov;
+	double disp = PCB_MM_TO_COORD(0.05);
+	double arrow = PCB_MM_TO_COORD(0.2);
+	double ax, ay, ax1, ay1, ax2, ay2;
+
+	if (subc->extobj_data == NULL)
+		line_of_vias_unpack(subc);
+	lov = subc->extobj_data;
+
+	pcb_render->set_color(pcb_draw_out.fgGC, selected ? &conf_core.appearance.color.selected : &conf_core.appearance.color.extobj);
+	pcb_hid_set_line_width(pcb_draw_out.fgGC, -1);
+	pcb_render->draw_line(pcb_draw_out.fgGC, lov->x1 - lov->dy * +disp, lov->y1 + lov->dx * +disp, lov->x2 - lov->dy * +disp, lov->y2 + lov->dx * +disp);
+	pcb_render->draw_line(pcb_draw_out.fgGC, lov->x1 - lov->dy * -disp, lov->y1 + lov->dx * -disp, lov->x2 - lov->dy * -disp, lov->y2 + lov->dx * -disp);
+
+	pcb_hid_set_line_width(pcb_draw_out.fgGC, -2);
+	ax = lov->x1 + lov->dx * arrow;
+	ay = lov->y1 + lov->dy * arrow;
+	ax1 = lov->x1 - lov->dy * +arrow;
+	ay1 = lov->y1 + lov->dx * +arrow;
+	ax2 = lov->x1 - lov->dy * -arrow;
+	ay2 = lov->y1 + lov->dx * -arrow;
+	pcb_render->draw_line(pcb_draw_out.fgGC, ax1, ay1, ax2, ay2);
+	pcb_render->draw_line(pcb_draw_out.fgGC, ax1, ay1, ax, ay);
+	pcb_render->draw_line(pcb_draw_out.fgGC, ax2, ay2, ax, ay);
+}
+
 pcb_any_obj_t *pcb_line_of_vias_get_edit_obj(pcb_subc_t *obj)
 {
 	pcb_any_obj_t *edit = pcb_extobj_get_editobj_by_attr(obj);
@@ -133,7 +181,7 @@
 
 static pcb_extobj_t pcb_line_of_vias = {
 	"line-of-vias",
-	NULL,
+	pcb_line_of_vias_draw_mark,
 	pcb_line_of_vias_get_edit_obj,
 	pcb_line_of_vias_edit_pre,
 	pcb_line_of_vias_edit_geo