info: open at most one metadata directory

lib/widgets/fullscreen/info/metadata_section.dart

@@ -26,6 +26,7 @@ class MetadataSectionSliver extends StatefulWidget {
 class _MetadataSectionSliverState extends State<MetadataSectionSliver> with AutomaticKeepAliveClientMixin {
   List<_MetadataDirectory> _metadata = [];
   String _loadedMetadataUri;
+  final ValueNotifier<String> _expandedDirectoryNotifier = ValueNotifier(null);
 
   bool get isVisible => widget.visibleNotifier.value;
 
@@ -81,6 +82,8 @@ class _MetadataSectionSliverState extends State<MetadataSectionSliver> with Auto
           }
           final dir = directoriesWithTitle[index - 1 - untitledDirectoryCount];
           return ExpansionTileCard(
+            value: dir.name,
+            expandedNotifier: _expandedDirectoryNotifier,
             title: _DirectoryTitle(dir.name),
             children: [
               const Divider(thickness: 1.0, height: 1.0),
@@ -91,6 +94,7 @@ class _MetadataSectionSliverState extends State<MetadataSectionSliver> with Auto
               ),
             ],
             baseColor: Colors.grey[900],
+            expandedColor: Colors.grey[850],
           );
         },
         childCount: 1 + _metadata.length,
@@ -119,6 +123,7 @@ class _MetadataSectionSliverState extends State<MetadataSectionSliver> with Auto
       _metadata = [];
       _loadedMetadataUri = null;
     }
+    _expandedDirectoryNotifier.value = null;
     if (mounted) setState(() {});
   }
 

pubspec.lock

@@ -104,9 +104,11 @@ packages:
   expansion_tile_card:
     dependency: "direct main"
     description:
-      name: expansion_tile_card
-      url: "https://pub.dartlang.org"
-    source: hosted
+      path: "."
+      ref: HEAD
+      resolved-ref: edb6b11bb448fc2f30e566a20605b37093503176
+      url: "git://github.com/deckerst/expansion_tile_card.git"
+    source: git
     version: "1.0.3"
   flushbar:
     dependency: "direct main"

pubspec.yaml

@@ -20,10 +20,14 @@ dependencies:
   charts_flutter:
   collection:
   draggable_scrollbar:
+#    path: ../flutter-draggable-scrollbar
     git:
       url: git://github.com/deckerst/flutter-draggable-scrollbar.git
   event_bus:
   expansion_tile_card:
+#    path: ../expansion_tile_card
+    git:
+      url: git://github.com/deckerst/expansion_tile_card.git
   flushbar:
     #   flushbar-1.9.1 cannot be built with Flutter 1.15.17
     git: