repro items repeater bug

samples/ControlCatalog/MainWindow.xaml

@@ -9,68 +9,27 @@
         xmlns:v="clr-namespace:ControlCatalog.Views"
         x:Class="ControlCatalog.MainWindow" WindowState="{Binding WindowState, Mode=TwoWay}">
 
-  <NativeMenu.Menu>
-    <NativeMenu>
-      <NativeMenuItem Header="File">
-        <NativeMenuItem.Menu>
-          <NativeMenu>
-            <NativeMenuItem Icon="/Assets/test_icon.ico" Header="Open" Clicked="OnOpenClicked" Gesture="Ctrl+O"/>
-            <NativeMenuItemSeperator/>
-            <NativeMenuItem Icon="/Assets/github_icon.png" Header="Recent">
-              <NativeMenuItem.Menu>
-                <NativeMenu/>
-              </NativeMenuItem.Menu>
-            </NativeMenuItem>
-            <NativeMenuItemSeperator/>
-            <NativeMenuItem Header="{x:Static local:MainWindow.MenuQuitHeader}"
-                            Gesture="{x:Static local:MainWindow.MenuQuitGesture}"
-                            Clicked="OnCloseClicked" />
-          </NativeMenu>
-        </NativeMenuItem.Menu>
-      </NativeMenuItem>
-      <NativeMenuItem Header="Edit">
-        <NativeMenuItem.Menu>
-          <NativeMenu>
-            <NativeMenuItem Header="Copy"/>
-            <NativeMenuItem Header="Paste"/>
-          </NativeMenu>
-        </NativeMenuItem.Menu>
-      </NativeMenuItem>
-      <NativeMenuItem Header="Options">
-        <NativeMenuItem.Menu>
-          <NativeMenu>
-           <NativeMenuItem Header="Check Me (None)" 
-                            Command="{Binding ToggleMenuItemCheckedCommand}"
-                            ToggleType="None"
-                            IsChecked="{Binding IsMenuItemChecked}"  />
-            <NativeMenuItem Header="Check Me (CheckBox)" 
-                            Command="{Binding ToggleMenuItemCheckedCommand}"
-                            ToggleType="CheckBox"
-                            IsChecked="{Binding IsMenuItemChecked}"  />
-            <NativeMenuItem Header="Check Me (Radio)" 
-                            Command="{Binding ToggleMenuItemCheckedCommand}"
-                            ToggleType="Radio"
-                            IsChecked="{Binding IsMenuItemChecked}"  />
-          </NativeMenu>
-        </NativeMenuItem.Menu>
-      </NativeMenuItem>
-    </NativeMenu>
-  </NativeMenu.Menu>
+  <ScrollViewer Name="scroller" HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Auto">
+    <ItemsRepeater Name="repeater" Background="Transparent" Items="{Binding Albums}" Margin="0 60">      
+      <ItemsRepeater.Layout>
+        <UniformGridLayout ItemsJustification="SpaceEvenly" MinRowSpacing="60" Orientation="Horizontal" MaximumRowsOrColumns="4" />
+      </ItemsRepeater.Layout>
+      <ItemsRepeater.ItemTemplate>
+        <DataTemplate>
 
- <Window.DataTemplates>
-    <DataTemplate DataType="vm:NotificationViewModel">
-      <v:CustomNotificationView />
-    </DataTemplate>
-  </Window.DataTemplates>
-  <DockPanel LastChildFill="True">
-    <Menu Name="MainMenu" DockPanel.Dock="Top">
-      <MenuItem Header="File">
-        <MenuItem Header="Exit" Command="{Binding ExitCommand}" />
-      </MenuItem>
-      <MenuItem Header="Help">
-        <MenuItem Header="About" Command="{Binding AboutCommand}" />
-      </MenuItem>
-    </Menu>
-    <local:MainView />
-  </DockPanel>
+          <Border BorderBrush="Black" Height="200" Width="200" BorderThickness="1">
+            <Panel>
+
+
+              <Panel>
+                <TextBlock Text="{Binding }" FontSize="40" VerticalAlignment="Center" HorizontalAlignment="Center" />
+              </Panel>
+            </Panel>
+          </Border>
+
+
+        </DataTemplate>
+      </ItemsRepeater.ItemTemplate>
+    </ItemsRepeater>
+  </ScrollViewer>
 </Window>

samples/ControlCatalog/MainWindow.xaml.cs

@@ -28,10 +28,7 @@ namespace ControlCatalog
             };
 
             DataContext = new MainWindowViewModel(_notificationArea);
-            _recentMenu = ((NativeMenu.GetMenu(this).Items[0] as NativeMenuItem).Menu.Items[2] as NativeMenuItem).Menu;
-
-            var mainMenu = this.FindControl<Menu>("MainMenu");
-            mainMenu.AttachedToVisualTree += MenuAttached;
+            
         }
 
         public static string MenuQuitHeader => RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ? "Quit Avalonia" : "E_xit";

samples/ControlCatalog/ViewModels/MainWindowViewModel.cs

@@ -1,3 +1,5 @@
+using System.Collections.Generic;
+using System.Linq;
 using System.Reactive;
 using Avalonia.Controls;
 using Avalonia.Controls.ApplicationLifetimes;
@@ -15,6 +17,9 @@ namespace ControlCatalog.ViewModels
         private WindowState _windowState;
         private WindowState[] _windowStates;
 
+        public List<int> Albums { get; set; } = Enumerable.Range(0, 400).ToList();
+
+
         public MainWindowViewModel(IManagedNotificationManager notificationManager)
         {
             _notificationManager = notificationManager;