improved empty collection placeholder

lib/widgets/album/empty.dart

@@ -2,6 +2,14 @@ import 'package:flutter/material.dart';
 import 'package:outline_material_icons/outline_material_icons.dart';
 
 class EmptyContent extends StatelessWidget {
+  final IconData icon;
+  final String text;
+
+  const EmptyContent({
+    this.icon = OMIcons.photo,
+    this.text = 'Nothing!',
+  });
+
   @override
   Widget build(BuildContext context) {
     const color = Color(0xFF607D8B);
@@ -9,16 +17,16 @@ class EmptyContent extends StatelessWidget {
       alignment: const FractionalOffset(.5, .35),
       child: Column(
         mainAxisSize: MainAxisSize.min,
-        children: const [
+        children: [
           Icon(
-            OMIcons.photo,
+            icon,
             size: 64,
             color: color,
           ),
-          SizedBox(height: 16),
+          const SizedBox(height: 16),
           Text(
-            'Nothing!',
+            text,
-            style: TextStyle(
+            style: const TextStyle(
               color: color,
               fontSize: 22,
               fontFamily: 'Concourse',

lib/widgets/album/thumbnail_collection.dart

@@ -1,4 +1,6 @@
 import 'package:aves/model/collection_lens.dart';
+import 'package:aves/model/filters/favourite.dart';
+import 'package:aves/model/filters/video.dart';
 import 'package:aves/widgets/album/collection_app_bar.dart';
 import 'package:aves/widgets/album/collection_page.dart';
 import 'package:aves/widgets/album/collection_scaling.dart';
@@ -7,6 +9,7 @@ import 'package:aves/widgets/album/empty.dart';
 import 'package:aves/widgets/common/scroll_thumb.dart';
 import 'package:draggable_scrollbar/draggable_scrollbar.dart';
 import 'package:flutter/material.dart';
+import 'package:outline_material_icons/outline_material_icons.dart';
 import 'package:provider/provider.dart';
 
 class ThumbnailCollection extends StatelessWidget {
@@ -54,7 +57,7 @@ class ThumbnailCollection extends StatelessWidget {
                     ),
                     if (collection.isEmpty)
                       SliverFillRemaining(
-                        child: EmptyContent(),
+                        child: _buildEmptyCollectionPlaceholder(collection),
                         hasScrollBody: false,
                       ),
                     ...sectionKeys.map((sectionKey) => SectionSliver(
@@ -99,4 +102,17 @@ class ThumbnailCollection extends StatelessWidget {
       ),
     );
   }
+
+  Widget _buildEmptyCollectionPlaceholder(CollectionLens collection) {
+    return collection.filters.any((filter) => filter is FavouriteFilter)
+        ? const EmptyContent(
+            icon: OMIcons.favoriteBorder,
+            text: 'No favourite!',
+          )
+        : collection.filters.any((filter) => filter is VideoFilter)
+            ? const EmptyContent(
+                icon: OMIcons.movie,
+              )
+            : const EmptyContent();
+  }
 }

lib/widgets/stats.dart

@@ -49,7 +49,7 @@ class StatsPage extends StatelessWidget {
   Widget build(BuildContext context) {
     Widget child;
     if (collection.isEmpty) {
-      child = EmptyContent();
+      child = const EmptyContent();
     } else {
       final catalogued = entries.where((entry) => entry.isCatalogued);
       final withGps = catalogued.where((entry) => entry.hasGps);