Index: trunk/src_plugins/ar_extern/ar_extern.c
===================================================================
--- trunk/src_plugins/ar_extern/ar_extern.c	(revision 32362)
+++ trunk/src_plugins/ar_extern/ar_extern.c	(revision 32363)
@@ -71,12 +71,11 @@
 	return NULL;
 }
 
-static void extroute_gui(pcb_board_t *pcb)
+static void extroute_query_conf(pcb_board_t *pcb)
 {
 	const ext_router_t **r;
-		vts0_t methods = {0};
+	vts0_t methods = {0};
 
-	printf("GUI!\n");
 	for(r = routers; *r != NULL; r++) {
 		int n;
 		rnd_export_opt_t *table, *cfg;
@@ -96,6 +95,9 @@
 	vts0_uninit(&methods);
 }
 
+#include "dlg_extroute.c"
+
+/*** actions ***/
 static const char pcb_acts_extroute[] = "extroute(board|selected, router, [confkey=value, ...])";
 static const char pcb_acth_extroute[] = "Executed external autorouter to route the board or parts of the board";
 fgw_error_t pcb_act_extroute(fgw_arg_t *res, int argc, fgw_arg_t *argv)
Index: trunk/src_plugins/ar_extern/dlg_extroute.c
===================================================================
--- trunk/src_plugins/ar_extern/dlg_extroute.c	(nonexistent)
+++ trunk/src_plugins/ar_extern/dlg_extroute.c	(revision 32363)
@@ -0,0 +1,76 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  pcb-rnd, interactive printed circuit board design
+ *
+ *  auto routing with external router process: dialog box
+ *  pcb-rnd Copyright (C) 2020 Tibor 'Igor2' Palinkas
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *  Contact:
+ *    Project page: http://repo.hu/projects/pcb-rnd
+ *    lead developer: http://repo.hu/projects/pcb-rnd/contact.html
+ *    mailing list: pcb-rnd (at) list.repo.hu (send "subscribe")
+ */
+
+#include <librnd/core/hid_dad.h>
+
+typedef struct {
+	RND_DAD_DECL_NOINIT(dlg)
+	int active; /* already open - allow only one instance */
+	int whatever;
+} ar_ctx_t;
+
+static ar_ctx_t ar_ctx;
+
+static void ar_close_cb(void *caller_data, rnd_hid_attr_ev_t ev)
+{
+	ar_ctx_t *ctx = caller_data;
+	RND_DAD_FREE(ctx->dlg);
+	memset(ctx, 0, sizeof(ar_ctx_t)); /* reset all states to the initial - includes ctx->active = 0; */
+}
+
+static void extroute_gui(pcb_board_t *pcb)
+{
+	rnd_hid_dad_buttons_t clbtn[] = {{"Close", 0}, {NULL, 0}};
+
+	if (ar_ctx.active)
+		return; /* do not open another */
+
+	printf("GUI!\n");
+	extroute_query_conf(pcb);
+
+	RND_DAD_BEGIN_VBOX(ar_ctx.dlg);
+		RND_DAD_LABEL(ar_ctx.dlg, "woops\n");
+
+		
+		RND_DAD_BEGIN_HBOX(ar_ctx.dlg);
+			RND_DAD_BUTTON(ar_ctx.dlg, "Route");
+			RND_DAD_BUTTON(ar_ctx.dlg, "Re-route");
+			RND_DAD_BUTTON(ar_ctx.dlg, "Save conf");
+			RND_DAD_BUTTON(ar_ctx.dlg, "Load conf");
+			RND_DAD_BEGIN_VBOX(ar_ctx.dlg);
+				RND_DAD_COMPFLAG(ar_ctx.dlg, RND_HATF_EXPFILL);
+			RND_DAD_END(ar_ctx.dlg);
+			RND_DAD_BUTTON_CLOSES(ar_ctx.dlg, clbtn);
+		RND_DAD_END(ar_ctx.dlg);
+	RND_DAD_END(ar_ctx.dlg);
+
+	/* set up the context */
+	ar_ctx.active = 1;
+
+	RND_DAD_NEW("external_autorouter", ar_ctx.dlg, "External autorouter", &ar_ctx, rnd_false, ar_close_cb);
+}