fix: mobile, query onlines, on active (#8796)

* fix: mobile, query onlines, on active

Signed-off-by: dignow <linlong1265@gmail.com>

* Update peer_tab_page.dart

---------

Signed-off-by: dignow <linlong1265@gmail.com>
Co-authored-by: RustDesk <71636191+rustdesk@users.noreply.github.com>

flutter/lib/common/widgets/peer_tab_page.dart

@@ -875,11 +875,14 @@ class _PeerSortDropdownState extends State<PeerSortDropdown> {
   @override
   void initState() {
     if (!PeerSortType.values.contains(peerSort.value)) {
+      Future.delayed(Duration.zero, () {
+        // do not change obx directly in initState, so do in future.
         peerSort.value = PeerSortType.remoteId;
         bind.setLocalFlutterOption(
           k: kOptionPeerSorting,
           v: peerSort.value,
         );
+      });
     }
     super.initState();
   }

flutter/lib/common/widgets/peers_view.dart

@@ -70,7 +70,8 @@ class _PeersView extends StatefulWidget {
 }
 
 /// State for the peer widget.
-class _PeersViewState extends State<_PeersView> with WindowListener {
+class _PeersViewState extends State<_PeersView>
+    with WindowListener, WidgetsBindingObserver {
   static const int _maxQueryCount = 3;
   final HashMap<String, String> _emptyMessages = HashMap.from({
     LoadEvent.recent: 'empty_recent_tip',
@@ -85,6 +86,7 @@ class _PeersViewState extends State<_PeersView> with WindowListener {
   var _lastQueryTime = DateTime.now();
   var _queryCount = 0;
   var _exit = false;
+  bool _isActive = true;
 
   final _scrollController = ScrollController();
 
@@ -95,12 +97,14 @@ class _PeersViewState extends State<_PeersView> with WindowListener {
   @override
   void initState() {
     windowManager.addListener(this);
+    WidgetsBinding.instance.addObserver(this);
     super.initState();
   }
 
   @override
   void dispose() {
     windowManager.removeListener(this);
+    WidgetsBinding.instance.removeObserver(this);
     _exit = true;
     super.dispose();
   }
@@ -115,6 +119,20 @@ class _PeersViewState extends State<_PeersView> with WindowListener {
     _queryCount = _maxQueryCount;
   }
 
+  // This function is required for mobile.
+  // `onWindowFocus` works fine for desktop.
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    super.didChangeAppLifecycleState(state);
+    if (isDesktop) return;
+    if (state == AppLifecycleState.resumed) {
+      _isActive = true;
+      _queryCount = 0;
+    } else if (state == AppLifecycleState.inactive) {
+      _isActive = false;
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return ChangeNotifierProvider<Peers>(
@@ -268,7 +286,7 @@ class _PeersViewState extends State<_PeersView> with WindowListener {
             _queryOnlines(false);
           }
         } else {
-          if (_queryCount < _maxQueryCount || !p) {
+          if (_isActive && (_queryCount < _maxQueryCount || !p)) {
             if (now.difference(_lastQueryTime) >= _queryInterval) {
               if (_curPeers.isNotEmpty) {
                 bind.queryOnlines(ids: _curPeers.toList(growable: false));
@@ -286,14 +304,14 @@ class _PeersViewState extends State<_PeersView> with WindowListener {
   _queryOnlines(bool isLoadEvent) {
     if (_curPeers.isNotEmpty) {
       bind.queryOnlines(ids: _curPeers.toList(growable: false));
+      _queryCount = 0;
+    }
     _lastQueryPeers = {..._curPeers};
     if (isLoadEvent) {
       _lastChangeTime = DateTime.now();
     } else {
       _lastQueryTime = DateTime.now().subtract(_queryInterval);
     }
-      _queryCount = 0;
-    }
   }
 
   Future<List<Peer>>? matchPeers(

flutter/lib/models/model.dart

@@ -384,7 +384,7 @@ class FfiModel with ChangeNotifier {
       } else if (name == 'use_texture_render') {
         _handleUseTextureRender(evt, sessionId, peerId);
       } else {
-        debugPrint('Unknown event name: $name');
+        debugPrint('Event is not handled in the fixed branch: $name');
       }
     };
   }