minor changes

lib/widgets/album/all_collection_page.dart

@@ -7,6 +7,7 @@ import 'package:aves/widgets/debug_page.dart';
 import 'package:aves/widgets/stats.dart';
 import 'package:flutter/material.dart';
 import 'package:outline_material_icons/outline_material_icons.dart';
+import 'package:pedantic/pedantic.dart';
 import 'package:provider/provider.dart';
 
 class AllCollectionPage extends StatelessWidget {
@@ -90,13 +91,15 @@ class _AllCollectionAppBar extends SliverAppBar {
     ];
   }
 
-  static void _onActionSelected(BuildContext context, CollectionLens collection, AlbumAction action) {
+  static void _onActionSelected(BuildContext context, CollectionLens collection, AlbumAction action) async {
+    // wait for the popup menu to hide before proceeding with the action
+    await Future.delayed(const Duration(milliseconds: 300));
     switch (action) {
       case AlbumAction.debug:
-        _goToDebug(context, collection);
+        unawaited(_goToDebug(context, collection));
         break;
       case AlbumAction.stats:
-        _goToStats(context, collection);
+        unawaited(_goToStats(context, collection));
         break;
       case AlbumAction.groupByAlbum:
         settings.collectionGroupFactor = GroupFactor.album;

lib/widgets/album/collection_section.dart

@@ -25,35 +25,24 @@ class SectionSliver extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final sections = collection.sections;
+    final sectionEntries = sections[sectionKey];
+    final childCount = sectionEntries.length;
 
     final sliver = SliverGrid(
       delegate: SliverChildBuilderDelegate(
-        // TODO TLAD find out why thumbnails are rebuilt (with `initState`)
+        // TODO TLAD thumbnails at the beginning of each sections are built even though they are offscreen
-        (context, index) {
+        // because of `RenderSliverMultiBoxAdaptor.addInitialChild`
-          final sectionEntries = sections[sectionKey];
+        // called by `RenderSliverGrid.performLayout` (line 547)
-          if (index >= sectionEntries.length) return null;
+        (context, index) => index < childCount
-          final entry = sectionEntries[index];
+            ? GridThumbnail(
-          return GestureDetector(
+                collection: collection,
-            key: ValueKey(entry.uri),
+                index: index,
-            onTap: () => _showFullscreen(context, entry),
+                entry: sectionEntries[index],
-            child: Selector<MediaQueryData, double>(
+                columnCount: columnCount,
-              selector: (c, mq) => mq.size.width,
+              )
-              builder: (c, mqWidth, child) {
+            : null,
-                return MetaData(
+        childCount: childCount,
-                  metaData: ThumbnailMetadata(index, entry),
-                  child: Thumbnail(
-                    entry: entry,
-                    extent: mqWidth / columnCount,
-                    heroTag: collection.heroTag(entry),
-                  ),
-                );
-              },
-            ),
-          );
-        },
-        childCount: sections[sectionKey].length,
         addAutomaticKeepAlives: false,
-        addRepaintBoundaries: true,
       ),
       gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
         crossAxisCount: columnCount,
@@ -70,12 +59,50 @@ class SectionSliver extends StatelessWidget {
       overlapsContent: false,
     );
   }
+}
 
-  void _showFullscreen(BuildContext context, ImageEntry entry) {
+class GridThumbnail extends StatelessWidget {
+  final CollectionLens collection;
+  final int index;
+  final ImageEntry entry;
+  final int columnCount;
+  final GestureTapCallback onTap;
+
+  const GridThumbnail({
+    Key key,
+    this.collection,
+    this.index,
+    this.entry,
+    this.columnCount,
+    this.onTap,
+  }) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      key: ValueKey(entry.uri),
+      onTap: () => _showFullscreen(context),
+      child: Selector<MediaQueryData, double>(
+        selector: (c, mq) => mq.size.width,
+        builder: (c, mqWidth, child) {
+          return MetaData(
+            metaData: ThumbnailMetadata(index, entry),
+            child: Thumbnail(
+              entry: entry,
+              extent: mqWidth / columnCount,
+              heroTag: collection.heroTag(entry),
+            ),
+          );
+        },
+      ),
+    );
+  }
+
+  void _showFullscreen(BuildContext context) {
     Navigator.push(
       context,
       TransparentMaterialPageRoute(
-        pageBuilder: (context, _, __) => MultiFullscreenPage(
+        pageBuilder: (c, a, sa) => MultiFullscreenPage(
           collection: collection,
           initialEntry: entry,
         ),

pubspec.lock

@@ -129,13 +129,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.6"
-  flutter_staggered_grid_view:
-    dependency: "direct main"
-    description:
-      name: flutter_staggered_grid_view
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.3.0"
   flutter_sticky_header:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -29,7 +29,6 @@ dependencies:
       url: https://github.com/AndreHaueisen/flushbar.git
       ref: 13c55a8
   flutter_native_timezone:
-  flutter_staggered_grid_view:
   flutter_sticky_header:
     git:
       url: git://github.com/deckerst/flutter_sticky_header.git