fixed bug, when on clearing grouped collection, adapter did not remove subscriptions from each group, increased version to 2.0.2

Author: Alex-Dobrynin

MPowerKit.VirtualizeListView/Adapters/GroupableDataAdapter.cs

@@ -7,7 +7,7 @@ public class GroupableDataAdapter(VirtualizeListView listView) : DataAdapter(lis
 {
     public class GroupItem(IEnumerable group, object data) : AdapterItem(data)
     {
-        public object Group { get; set; } = group;
+        public IEnumerable Group { get; set; } = group;
     }
     public class GroupHeaderItem(IEnumerable group) : GroupItem(group, group) { }
     public class GroupFooterItem(IEnumerable group) : GroupItem(group, group) { }
@@ -345,6 +345,8 @@ protected override void OnCollectionChangedReset(IEnumerable? itemsSource)
             return;
         }
 
+        ResetGroups(InternalItems.OfType<GroupItem>().DistinctBy(i => i.Group).Select(i => i.Group));
+
         if (itemsSource is not IEnumerable<IEnumerable> groups)
         {
             throw new ArgumentException("The collection type for IsGrouped should be only typeof(IEnumerable<IEnumerable>) or derived interfaces or classes from it");

MPowerKit.VirtualizeListView/MPowerKit.VirtualizeListView.csproj

@@ -20,7 +20,7 @@
 
 		<GeneratePackageOnBuild>True</GeneratePackageOnBuild>
 		<Title>MPowerKit.VirtualizeListView</Title>
-		<Version>2.0.1</Version>
+		<Version>2.0.2</Version>
 		<Authors>MPowerKit,Alex Dobrynin</Authors>
 		<Description>MAUI Virtualize ListView with smooth scrolling and without platform-specific code</Description>
 		<Copyright>MPowerKit</Copyright>

Sample/MainPage.xaml

@@ -30,7 +30,7 @@
                                       Padding="15"
                                       Grid.Row="2"
                                       BackgroundColor="Aqua"
-                                      IsGrouped="False">
+                                      IsGrouped="True">
             <mpowerkit:VirtualizeListView.Resources>
                 <ResourceDictionary>
                     <Style TargetType="mpowerkit:LinearItemsLayoutManager">
@@ -47,15 +47,15 @@
                                       VerticalItemSpacing="15" />-->
             </mpowerkit:VirtualizeListView.ItemsLayout>
 
-            <!--<mpowerkit:VirtualizeListView.GroupHeaderTemplate>
+            <mpowerkit:VirtualizeListView.GroupHeaderTemplate>
                 <DataTemplate x:DataType="local:ItemsGroup">
                     <Grid Padding="15"
                           BackgroundColor="Aqua">
                         <Label Text="{Binding Key}"
                                TextColor="Black" />
                     </Grid>
                 </DataTemplate>
-            </mpowerkit:VirtualizeListView.GroupHeaderTemplate>-->
+            </mpowerkit:VirtualizeListView.GroupHeaderTemplate>
             <mpowerkit:VirtualizeListView.ItemTemplate>
                 <local:ItemTemplateSelector>
                     <local:ItemTemplateSelector.EvenTemplate>

Sample/MainPage.xaml.cs

@@ -54,6 +54,8 @@ public MainPage()
 
     private void FillItems()
     {
+        (listView.ItemsSource as ObservableRangeCollection<ItemsGroup>)?.Clear();
+
         var items = new ObservableRangeCollection<Item>();
 
         for (int i = 0; i < 500; i++)
@@ -68,7 +70,7 @@ private void FillItems()
             });
         }
 
-        listView.ItemsSource = items;//.GroupBy(i => (int)(i.Id / 10.0)).Select(g => new ItemsGroup(g, g.Key));
+        listView.ItemsSource = new ObservableRangeCollection<ItemsGroup>(items.GroupBy(i => (int)(i.Id / 10.0)).Select(g => new ItemsGroup(g, g.Key)));
     }
 
     private async void FixedRefreshView_Refreshing(object sender, EventArgs e)