From 00a56a79305db61f8690fd595947ed329efd7e63 Mon Sep 17 00:00:00 2001
From: Sorunome <mail@sorunome.de>
Date: Wed, 23 Dec 2020 10:25:38 +0100
Subject: [PATCH] fix: Don't re-render the lock icon nearly as often

---
 lib/components/encryption_button.dart | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/lib/components/encryption_button.dart b/lib/components/encryption_button.dart
index c00937ac..b337a7dc 100644
--- a/lib/components/encryption_button.dart
+++ b/lib/components/encryption_button.dart
@@ -49,6 +49,8 @@ class _EncryptionButtonState extends State<EncryptionButton> {
       await SimpleDialogs(context).tryRequestWithLoadingDialog(
         widget.room.enableEncryption(),
       );
+      // we want to enable the lock icon
+      setState(() => null);
     }
   }
 
@@ -60,11 +62,14 @@ class _EncryptionButtonState extends State<EncryptionButton> {
 
   @override
   Widget build(BuildContext context) {
-    _onSyncSub ??= Matrix.of(context)
-        .client
-        .onSync
-        .stream
-        .listen((s) => setState(() => null));
+    if (widget.room.encrypted) {
+      _onSyncSub ??= Matrix.of(context)
+          .client
+          .onSync
+          .stream
+          .where((s) => s.deviceLists != null)
+          .listen((s) => setState(() => null));
+    }
     return FutureBuilder<List<User>>(
         future:
             widget.room.encrypted ? widget.room.requestParticipants() : null,