From 367cb2e76cad9279c676002c2b086890dceda20b Mon Sep 17 00:00:00 2001
From: Alain Emilia Anna Zscheile <fogti+devel@ytrizja.de>
Date: Sun, 29 Sep 2024 23:40:20 +0200
Subject: [PATCH] egui: disable 'Place Via' when no invoker is active

---
 src/bin/topola-egui/top.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/bin/topola-egui/top.rs b/src/bin/topola-egui/top.rs
index f6f1977..36b5324 100644
--- a/src/bin/topola-egui/top.rs
+++ b/src/bin/topola-egui/top.rs
@@ -186,7 +186,9 @@ impl Top {
                     });
 
                     ui.menu_button(tr.text("menu-place"), |ui| {
-                        place_via.toggle_widget(ctx, ui, &mut self.is_placing_via);
+                        ui.add_enabled_ui(arc_mutex_maybe_invoker.lock().unwrap().is_some(), |ui| {
+                            place_via.toggle_widget(ctx, ui, &mut self.is_placing_via);
+                        });
                     });
 
                     ui.menu_button(tr.text("menu-route"), |ui| {