fix: ItemContainerGenerator obsolete member after #9677

src/Avalonia.Controls/Automation/Peers/ListItemAutomationPeer.cs

@@ -36,7 +36,7 @@ namespace Avalonia.Automation.Peers
 
             if (Owner.Parent is SelectingItemsControl parent)
             {
-                var index = parent.ItemContainerGenerator.IndexFromContainer(Owner);
+                var index = parent.IndexFromContainer(Owner);
 
                 if (index != -1)
                     parent.SelectedIndex = index;
@@ -50,7 +50,7 @@ namespace Avalonia.Automation.Peers
             if (Owner.Parent is ItemsControl parent &&
                 parent.GetValue(ListBox.SelectionProperty) is ISelectionModel selectionModel)
             {
-                var index = parent.ItemContainerGenerator.IndexFromContainer(Owner);
+                var index = parent.IndexFromContainer(Owner);
 
                 if (index != -1)
                     selectionModel.Select(index);

src/Avalonia.Controls/Automation/Peers/SelectingItemsControlAutomationPeer.cs

@@ -35,7 +35,7 @@ namespace Avalonia.Automation.Peers
 
                 foreach (var i in selection.SelectedIndexes)
                 {
-                    var container = owner.ItemContainerGenerator.ContainerFromIndex(i);
+                    var container = owner.ContainerFromIndex(i);
 
                     if (container is Control c && c.IsAttachedToVisualTree)
                     {

src/Avalonia.Controls/ComboBox.cs

@@ -399,12 +399,12 @@ namespace Avalonia.Controls
             var selectedIndex = SelectedIndex;
             if (IsDropDownOpen && selectedIndex != -1)
             {
-                var container = ItemContainerGenerator.ContainerFromIndex(selectedIndex);
+                var container = ContainerFromIndex(selectedIndex);
 
                 if (container == null && SelectedIndex != -1)
                 {
                     ScrollIntoView(Selection.SelectedIndex);
-                    container = ItemContainerGenerator.ContainerFromIndex(selectedIndex);
+                    container = ContainerFromIndex(selectedIndex);
                 }
 
                 if (container != null && CanFocus(container))

src/Avalonia.Controls/MenuBase.cs

@@ -84,13 +84,13 @@ namespace Avalonia.Controls
             {
                 var index = SelectedIndex;
                 return (index != -1) ?
-                    (IMenuItem?)ItemContainerGenerator.ContainerFromIndex(index) :
+                    (IMenuItem?)ContainerFromIndex(index) :
                     null;
             }
             set
             {
                 SelectedIndex = value is Control c ?
-                    ItemContainerGenerator.IndexFromContainer(c) : -1;
+                    IndexFromContainer(c) : -1;
             }
         }
 

src/Avalonia.Controls/MenuItem.cs

@@ -13,7 +13,6 @@ using Avalonia.Data;
 using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.LogicalTree;
-using Avalonia.VisualTree;
 
 namespace Avalonia.Controls
 {
@@ -319,12 +318,12 @@ namespace Avalonia.Controls
             {
                 var index = SelectedIndex;
                 return (index != -1) ?
-                    (IMenuItem?)ItemContainerGenerator.ContainerFromIndex(index) :
+                    (IMenuItem?)ContainerFromIndex(index) :
                     null;
             }
             set
             {
-                SelectedIndex = value is Control c ? ItemContainerGenerator.IndexFromContainer(c) : -1;
+                SelectedIndex = value is Control c ? IndexFromContainer(c) : -1;
             }
         }
 
@@ -691,7 +690,7 @@ namespace Avalonia.Controls
 
             if (selected != -1)
             {
-                var container = ItemContainerGenerator?.ContainerFromIndex(selected);
+                var container = ContainerFromIndex(selected);
                 container?.Focus();
             }
         }

src/Avalonia.Controls/TabControl.cs

@@ -195,7 +195,7 @@ namespace Avalonia.Controls
             else
             {
                 var container = SelectedItem as IContentControl ??
-                    ItemContainerGenerator.ContainerFromIndex(SelectedIndex) as IContentControl;
+                    ContainerFromIndex(SelectedIndex) as IContentControl;
                 SelectedContentTemplate = container?.ContentTemplate;
                 SelectedContent = container?.Content;
             }

src/Avalonia.Controls/TreeView.cs

@@ -575,7 +575,7 @@ namespace Avalonia.Controls
                     {
                         var previous = (TreeViewItem)parentItemsControl.ContainerFromIndex(index - 1)!;
                         result = previous.IsExpanded && previous.ItemCount > 0 ?
-                            (TreeViewItem)previous.ItemContainerGenerator.ContainerFromIndex(previous.ItemCount - 1)! :
+                            (TreeViewItem)previous.ContainerFromIndex(previous.ItemCount - 1)! :
                             previous;
                     }
                     else