#1608 query bar unfocus when navigating away

lib/widgets/collection/app_bar.dart

@@ -18,6 +18,7 @@ import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
 import 'package:aves/theme/themes.dart';
 import 'package:aves/view/view.dart';
+import 'package:aves/widgets/aves_app.dart';
 import 'package:aves/widgets/collection/collection_page.dart';
 import 'package:aves/widgets/collection/entry_set_action_delegate.dart';
 import 'package:aves/widgets/collection/filter_bar.dart';
@@ -56,7 +57,7 @@ class CollectionAppBar extends StatefulWidget {
   State<CollectionAppBar> createState() => _CollectionAppBarState();
 }
 
-class _CollectionAppBarState extends State<CollectionAppBar> with SingleTickerProviderStateMixin, WidgetsBindingObserver {
+class _CollectionAppBarState extends State<CollectionAppBar> with RouteAware, SingleTickerProviderStateMixin, WidgetsBindingObserver {
   final Set<StreamSubscription> _subscriptions = {};
   final EntrySetActionDelegate _actionDelegate = EntrySetActionDelegate();
   late AnimationController _browseToSelectAnimation;
@@ -122,6 +123,15 @@ class _CollectionAppBarState extends State<CollectionAppBar> with SingleTickerPr
     });
   }
 
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    final route = ModalRoute.of(context);
+    if (route is PageRoute) {
+      AvesApp.pageRouteObserver.subscribe(this, route);
+    }
+  }
+
   @override
   void didUpdateWidget(covariant CollectionAppBar oldWidget) {
     super.didUpdateWidget(oldWidget);
@@ -140,6 +150,7 @@ class _CollectionAppBarState extends State<CollectionAppBar> with SingleTickerPr
       ..forEach((sub) => sub.cancel())
       ..clear();
     WidgetsBinding.instance.removeObserver(this);
+    AvesApp.pageRouteObserver.unsubscribe(this);
     super.dispose();
   }
 
@@ -151,6 +162,13 @@ class _CollectionAppBarState extends State<CollectionAppBar> with SingleTickerPr
     widget.collection.filterChangeNotifier.removeListener(_onFilterChanged);
   }
 
+  @override
+  void didPushNext() {
+    // unfocus when navigating away, so that when navigating back,
+    // the query bar does not get back focus and bring the keyboard
+    _queryBarFocusNode.unfocus();
+  }
+
   @override
   void didChangeMetrics() {
     // when top padding or text scale factor change

lib/widgets/filter_grids/common/app_bar.dart

@@ -11,6 +11,7 @@ import 'package:aves/model/source/collection_source.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/themes.dart';
 import 'package:aves/view/view.dart';
+import 'package:aves/widgets/aves_app.dart';
 import 'package:aves/widgets/common/action_controls/togglers/title_search.dart';
 import 'package:aves/widgets/common/app_bar/app_bar_subtitle.dart';
 import 'package:aves/widgets/common/app_bar/app_bar_title.dart';
@@ -78,7 +79,7 @@ class FilterGridAppBar<T extends CollectionFilter, CSAD extends ChipSetActionDel
   }
 }
 
-class _FilterGridAppBarState<T extends CollectionFilter, CSAD extends ChipSetActionDelegate<T>> extends State<FilterGridAppBar<T, CSAD>> with SingleTickerProviderStateMixin, WidgetsBindingObserver {
+class _FilterGridAppBarState<T extends CollectionFilter, CSAD extends ChipSetActionDelegate<T>> extends State<FilterGridAppBar<T, CSAD>> with RouteAware, SingleTickerProviderStateMixin, WidgetsBindingObserver {
   final Set<StreamSubscription> _subscriptions = {};
   late AnimationController _browseToSelectAnimation;
   final ValueNotifier<bool> _isSelectingNotifier = ValueNotifier(false);
@@ -112,6 +113,15 @@ class _FilterGridAppBarState<T extends CollectionFilter, CSAD extends ChipSetAct
     WidgetsBinding.instance.addPostFrameCallback((_) => _updateAppBarHeight());
   }
 
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    final route = ModalRoute.of(context);
+    if (route is PageRoute) {
+      AvesApp.pageRouteObserver.subscribe(this, route);
+    }
+  }
+
   @override
   void dispose() {
     _queryBarFocusNode.dispose();
@@ -122,9 +132,17 @@ class _FilterGridAppBarState<T extends CollectionFilter, CSAD extends ChipSetAct
       ..forEach((sub) => sub.cancel())
       ..clear();
     WidgetsBinding.instance.removeObserver(this);
+    AvesApp.pageRouteObserver.unsubscribe(this);
     super.dispose();
   }
 
+  @override
+  void didPushNext() {
+    // unfocus when navigating away, so that when navigating back,
+    // the query bar does not get back focus and bring the keyboard
+    _queryBarFocusNode.unfocus();
+  }
+
   @override
   void didChangeMetrics() {
     // when text scale factor changes