Improve sub navigations

Bitvault.Avalonia/AllNavigationView.axaml

@@ -27,6 +27,7 @@
                 <NavigateAction Region="Left" Route="ContentItemCollection">
                     <Parameter Key="Filter" Value="{Binding Filter}" />
                     <Parameter Key="Transition" Value="FromRight" />
+                    <Parameter Key="NavigationStackEnabled" Value="{x:True}" />
                 </NavigateAction>
             </ConditionAction>
         </DataTriggerBehavior>

Bitvault.Avalonia/App.axaml.cs

@@ -105,10 +105,11 @@ public partial class App : Application
                         services.AddTemplate<ItemCollectionViewModel, ItemCollectionView>("ContentItemCollection");
                         services.AddHandler<AggerateLockerItemViewModelHandler>();
 
-                        services.AddTemplate<SearchLockerActionViewModel, SearchLockerActionView>();
                         services.AddTemplate<LockerHeaderViewModel, LockerHeaderView>("LockerHeader");
-
+                        services.AddTemplate<BackActionViewModel, BackActionView>();
                         services.AddTemplate<CreateItemActionViewModel, CreateItemActionView>();
+                        services.AddTemplate<SearchLockerActionViewModel, SearchLockerActionView>();
+
                         services.AddTemplate<ItemCategoryCollectionViewModel, ItemCategoryCollectionView>("LockerItemCategoryCollection");
                         services.AddTemplate<ItemCategoryNavigationViewModel, ItemCategoryNavigationView>();
                        
@@ -116,6 +117,7 @@ public partial class App : Application
 
                         services.AddTemplate<ItemNavigationViewModel, ItemNavigationView>();
                         services.AddTemplate<ItemViewModel, ItemView>("Item");
+
                         services.AddHandler<AggerateItemViewModelHandler>();
 
                         services.AddTemplate<ItemCommandHeaderViewModel, ItemCommandHeaderView>("ItemCommandHeader");

Bitvault.Avalonia/ArchiveNavigationView.axaml

@@ -27,6 +27,7 @@
                 <NavigateAction Region="Left" Route="ContentItemCollection">
                     <Parameter Key="Filter" Value="{Binding Filter}" />
                     <Parameter Key="Transition" Value="FromRight" />
+                    <Parameter Key="NavigationStackEnabled" Value="{x:True}" />
                 </NavigateAction>
             </ConditionAction>
         </DataTriggerBehavior>

Bitvault.Avalonia/BackActionView.axaml

@@ -0,0 +1,42 @@
+<UserControl
+    x:Class="Bitvault.Avalonia.BackActionView"
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <UserControl.Resources>
+        <ResourceDictionary>
+            <x:Double x:Key="ButtonWidth">40</x:Double>
+            <x:Double x:Key="ButtonHeight">36</x:Double>
+            <SolidColorBrush x:Key="ButtonBackground" Color="{DynamicResource SubtleFillColorTransparent}" />
+            <SolidColorBrush x:Key="ButtonBackgroundPointerOver" Color="{DynamicResource SubtleFillColorSecondary}" />
+            <SolidColorBrush x:Key="ButtonBackgroundPressed" Color="{DynamicResource SubtleFillColorTertiary}" />
+            <Thickness x:Key="ButtonBorderThemeThickness">0</Thickness>
+            <ResourceDictionary.ThemeDictionaries>
+                <ResourceDictionary x:Key="Light">
+                    <SolidColorBrush x:Key="IconForegroundBrush" Color="#AB000000" />
+                </ResourceDictionary>
+                <ResourceDictionary x:Key="Dark">
+                    <SolidColorBrush x:Key="IconForegroundBrush" Color="#ABFFFFFF" />
+                </ResourceDictionary>
+            </ResourceDictionary.ThemeDictionaries>
+        </ResourceDictionary>
+    </UserControl.Resources>
+    <Button
+        Width="{StaticResource ButtonWidth}"
+        Height="{StaticResource ButtonHeight}"
+        VerticalAlignment="Center"
+        Foreground="{DynamicResource IconForegroundBrush}"
+        ToolTip.Tip="Back">
+        <TextBlock
+            Margin="0,3,0,0"
+            VerticalAlignment="Center"
+            FontFamily="{DynamicResource FluentThemeFontFamily}"
+            FontSize="16"
+            Foreground="{DynamicResource IconForegroundBrush}"
+            Text="&#xE0F5;" />
+        <Interaction.Behaviors>
+            <EventTriggerBehavior EventName="Click">
+                <NavigateBackAction Region="Left" />
+            </EventTriggerBehavior>
+        </Interaction.Behaviors>
+    </Button>
+</UserControl>

Bitvault.Avalonia/BackActionView.axaml.cs

@@ -0,0 +1,9 @@
+using Avalonia.Controls;
+
+namespace Bitvault.Avalonia;
+
+public partial class BackActionView : UserControl
+{
+    public BackActionView() =>
+        InitializeComponent();
+}

Bitvault.Avalonia/CreateItemActionView.axaml

@@ -30,6 +30,7 @@
             <EventTriggerBehavior EventName="Click">
                 <NavigateAction Region="Left" Route="LockerItemCategoryCollection">
                     <Parameter Key="Transition" Value="FromRight" />
+                    <Parameter Key="NavigationStackEnabled" Value="{x:True}" />
                 </NavigateAction>
             </EventTriggerBehavior>
         </Interaction.Behaviors>

Bitvault.Avalonia/ItemCategoryNavigationView.axaml

@@ -4,4 +4,31 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:vm="using:Bitvault"
     x:DataType="vm:ItemCategoryNavigationViewModel"
-    Content="{Binding Name}" />
+    Content="{Binding Name}"
+    IsSelected="{Binding Selected, Mode=TwoWay}">
+    <Interaction.Behaviors>
+        <AttachedBehaviour>
+            <ConditionAction>
+                <ConditionAction.Condition>
+                    <ConditionalExpression ForwardChaining="And">
+                        <ComparisonCondition LeftOperand="{Binding Selected}" RightOperand="True" />
+                    </ConditionalExpression>
+                </ConditionAction.Condition>
+                <NavigateAction
+                    Region="{Binding Named, StringFormat='{}{0}:Content'}"
+                    Route="Item"
+                    Scope="self">
+                    <Parameter Key="Immutable" Value="{x:False}" />
+                </NavigateAction>
+            </ConditionAction>
+        </AttachedBehaviour>
+        <DataTriggerBehavior Binding="{Binding Selected}" Value="True">
+            <NavigateAction
+                Region="{Binding Named, StringFormat='{}{0}:Content'}"
+                Route="Item"
+                Scope="self">
+                <Parameter Key="Immutable" Value="{x:False}" />
+            </NavigateAction>
+        </DataTriggerBehavior>
+    </Interaction.Behaviors>
+</ListBoxItem>

Bitvault.Avalonia/ItemCategoryNavigationView.axaml.cs

@@ -2,7 +2,7 @@ using Avalonia.Controls;
 
 namespace Bitvault.Avalonia;
 
-public partial class ItemCategoryNavigationView : UserControl
+public partial class ItemCategoryNavigationView : ListBoxItem
 {
     public ItemCategoryNavigationView() =>
         InitializeComponent();

Bitvault.Avalonia/LockerView.axaml

@@ -13,7 +13,7 @@
             Grid.Row="0"
             Grid.ColumnSpan="3"
             Height="44"
-            Margin="8,0,0,0">
+            Margin="4,2,0,0">
             <ContentControl VerticalAlignment="Center">
                 <Interaction.Behaviors>
                     <AttachedBehaviour>

Bitvault.Avalonia/StarredNavigationView.axaml

@@ -27,6 +27,7 @@
                 <NavigateAction Region="Left" Route="ContentItemCollection">
                     <Parameter Key="Filter" Value="{Binding Filter}" />
                     <Parameter Key="Transition" Value="FromRight" />
+                    <Parameter Key="NavigationStackEnabled" Value="{x:True}" />
                 </NavigateAction>
             </ConditionAction>
         </DataTriggerBehavior>

Bitvault/BackActionViewModel.cs

@@ -0,0 +1,20 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Toolkit.Foundation;
+
+namespace Bitvault;
+
+public partial class BackActionViewModel(IServiceProvider provider,
+    IServiceFactory factory,
+    IMediator mediator,
+    IPublisher publisher,
+    ISubscription subscriber,
+    IDisposer disposer) : Observable<string>(provider, factory, mediator, publisher, subscriber, disposer)
+{
+    [ObservableProperty]
+    private int index = 0;
+
+    [RelayCommand]
+    public void Invoke() => Publisher.Publish(Notify.As(new Search(Value)),
+        nameof(ItemCollectionViewModel));
+}

Bitvault/ItemCategoryCollectionViewModel.cs

@@ -19,7 +19,7 @@ public partial class ItemCategoryCollectionViewModel(IServiceProvider provider,
     {
         Publisher.Publish(Notify.As(Factory.Create<LockerCommandHeaderCollection>(new List<IDisposable>
         {
-
+            Factory.Create<BackActionViewModel>(),
         })));
 
         return base.OnActivated();

Bitvault/ItemCategoryNavigationViewModel.cs

@@ -9,9 +9,20 @@ public partial class ItemCategoryNavigationViewModel(IServiceProvider provider,
     IPublisher publisher,
     ISubscription subscriber,
     IDisposer disposer,
-    string name) :
+    NamedComponent named,
-    Observable(provider, factory, mediator, publisher, subscriber, disposer)
+    string name,
+    bool selected = false) :
+    Observable(provider, factory, mediator, publisher, subscriber, disposer),
+    ISelectable,
+    IRemovable
 {
     [ObservableProperty]
     private string name = name;
+
+    [ObservableProperty]
+    private string named = $"{named}";
+
+    [ObservableProperty]
+    private bool selected = selected;
+
 }

Bitvault/ItemCollectionViewModel.cs

@@ -6,7 +6,8 @@ namespace Bitvault;
 public partial class ItemCollectionViewModel :
     ObservableCollection<ItemNavigationViewModel>,
     INotificationHandler<NotifyEventArgs<Filter>>,
-    INotificationHandler<NotifyEventArgs<Search>>
+    INotificationHandler<NotifyEventArgs<Search>>,
+    IBackStack
 {
     private LockerViewModelConfiguration configuration;
 

Bitvault/SearchLockerActionViewModel.cs

@@ -18,18 +18,3 @@ public partial class SearchLockerActionViewModel(IServiceProvider provider,
     public void Invoke() => Publisher.Publish(Notify.As(new Search(Value)),
         nameof(ItemCollectionViewModel));
 }
-
-public partial class BackContainerActionViewModel(IServiceProvider provider,
-    IServiceFactory factory,
-    IMediator mediator,
-    IPublisher publisher,
-    ISubscription subscriber,
-    IDisposer disposer) : Observable<string>(provider, factory, mediator, publisher, subscriber, disposer)
-{
-    [ObservableProperty]
-    private int index = 2;
-
-    [RelayCommand]
-    public void Invoke() => Publisher.Publish(Notify.As(new Search(Value)),
-        nameof(ItemCollectionViewModel));
-}