Rework gallery loading, and VM creation

Wabbajack.App.Wpf/App.xaml.cs

@@ -37,6 +37,8 @@ namespace Wabbajack
             services.AddSingleton<MainSettings>();
             services.AddTransient<CompilerVM>();
             services.AddTransient<InstallerVM>();
+            services.AddTransient<ModeSelectionVM>();
+            services.AddTransient<ModListGalleryVM>();
             
             
             return services;

Wabbajack.App.Wpf/Messages/NavigateBack.cs

@@ -0,0 +1,11 @@
+using ReactiveUI;
+
+namespace Wabbajack.Messages;
+
+public class NavigateBack
+{
+    public static void Send()
+    {
+        MessageBus.Current.SendMessage(new NavigateBack());
+    }
+}

Wabbajack.App.Wpf/Messages/NavigateTo.cs

@@ -0,0 +1,21 @@
+using ReactiveUI;
+using Wabbajack.Lib;
+
+namespace Wabbajack.Messages;
+
+public class NavigateTo
+{
+
+    public ViewModel ViewModel { get; }
+    private NavigateTo(ViewModel vm)
+    {
+        ViewModel = vm;
+    }
+
+    public static void Send<T>(T vm)
+        where T : ViewModel
+    {
+        MessageBus.Current.SendMessage(new NavigateTo(vm));
+    }
+
+}

Wabbajack.App.Wpf/Messages/NavigateToGlobal.cs

@@ -0,0 +1,29 @@
+using ReactiveUI;
+
+namespace Wabbajack.Messages;
+
+public class NavigateToGlobal
+{
+    public enum ScreenType
+    {
+        ModeSelectionView,
+        ModListGallery,
+        Installer,
+        Settings,
+        Compiler,
+        ModListContents
+    }
+
+    public ScreenType Screen { get; }
+    
+    private NavigateToGlobal(ScreenType screen)
+    {
+        Screen = screen;
+    }
+
+    public static void Send(ScreenType screen)
+    {
+        MessageBus.Current.SendMessage(new NavigateToGlobal(screen));
+    }
+
+}

Wabbajack.App.Wpf/View Models/BackNavigatingVM.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Reactive;
+using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using System.Reactive.Subjects;
 using Microsoft.Extensions.Logging;
@@ -7,6 +8,7 @@ using ReactiveUI;
 using ReactiveUI.Fody.Helpers;
 using Wabbajack.Common;
 using Wabbajack.Lib;
+using Wabbajack.Messages;
 
 namespace Wabbajack
 {
@@ -24,27 +26,30 @@ namespace Wabbajack
         [Reactive]
         public ViewModel NavigateBackTarget { get; set; }
         public ReactiveCommand<Unit, Unit> BackCommand { get; protected set; }
-
+        
-        protected ObservableAsPropertyHelper<bool> _IsActive;
+        [Reactive]
-        public bool IsActive => _IsActive.Value;
+        public bool IsActive { get; set; }
         
         public Subject<bool> IsBackEnabledSubject { get; } = new Subject<bool>();
         public IObservable<bool> IsBackEnabled { get; }
 
-        public BackNavigatingVM(ILogger logger, MainWindowVM mainWindowVM)
+        public BackNavigatingVM(ILogger logger)
         {
             IsBackEnabled = IsBackEnabledSubject.StartWith(true);
             BackCommand = ReactiveCommand.Create(
                 execute: () => logger.CatchAndLog(() =>
                 {
-                    mainWindowVM.NavigateTo(NavigateBackTarget);
+                    NavigateBack.Send();
                     Unload();
                 }),
                 canExecute: this.ConstructCanNavigateBack()
                     .ObserveOnGuiThread());
-
+            
-            _IsActive = this.ConstructIsActive(mainWindowVM)
+            this.WhenActivated(disposables =>
-                .ToGuiProperty(this, nameof(IsActive));
+            {
+                IsActive = true;
+                Disposable.Create(() => IsActive = false).DisposeWith(disposables);
+            });
         }
 
         public virtual void Unload()
@@ -60,7 +65,7 @@ namespace Wabbajack
                 .CombineLatest(vm.IsBackEnabled)
                 .Select(x => x.First != null && x.Second);
         }
-
+        
         public static IObservable<bool> ConstructIsActive(this IBackNavigatingVM vm, MainWindowVM mwvm)
         {
             return mwvm.WhenAny(x => x.ActivePane)

Wabbajack.App.Wpf/View Models/Compilers/CompilerVM.cs

@@ -13,6 +13,7 @@ using Microsoft.Extensions.Logging;
 using Wabbajack.Compiler;
 using Wabbajack.Lib.Extensions;
 using Wabbajack.Lib.Interventions;
+using Wabbajack.Messages;
 using Wabbajack.RateLimiter;
 
 namespace Wabbajack
@@ -64,7 +65,7 @@ namespace Wabbajack
         private readonly ObservableAsPropertyHelper<(int CurrentCPUs, int DesiredCPUs)> _CurrentCpuCount;
         public (int CurrentCPUs, int DesiredCPUs) CurrentCpuCount => _CurrentCpuCount.Value;
         
-        public CompilerVM(ILogger<CompilerVM> logger, MainWindowVM mainWindowVM) : base(logger, mainWindowVM)
+        public CompilerVM(ILogger<CompilerVM> logger, MainWindowVM mainWindowVM) : base(logger)
         {
             MWVM = mainWindowVM;
             
@@ -133,7 +134,7 @@ namespace Wabbajack
             BackCommand = ReactiveCommand.Create(
                 execute: () =>
                 {
-                    mainWindowVM.NavigateTo(mainWindowVM.ModeSelectionVM);
+                    NavigateToGlobal.Send(NavigateToGlobal.ScreenType.ModeSelectionView);
                     StartedCompilation = false;
                     Completed = null;
                 },

Wabbajack.App.Wpf/View Models/Gallery/ModListGalleryVM.cs

@@ -1,9 +1,13 @@
-using System;
+
+
+using System;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
 using System.Reactive;
 using System.Reactive.Disposables;
 using System.Reactive.Linq;
+using System.Threading.Tasks;
 using System.Windows.Input;
 using DynamicData;
 using DynamicData.Binding;
@@ -17,6 +21,7 @@ using Wabbajack.DTOs;
 using Wabbajack.Hashing.xxHash64;
 using Wabbajack.Lib.Extensions;
 using Wabbajack.Networking.WabbajackClientApi;
+using Wabbajack.Services.OSIntegrated;
 using Wabbajack.Services.OSIntegrated.Services;
 
 namespace Wabbajack
@@ -24,68 +29,48 @@ namespace Wabbajack
     public class ModListGalleryVM : BackNavigatingVM
     {
         public MainWindowVM MWVM { get; }
-
+        
-        public ObservableCollectionExtended<ModListMetadataVM> ModLists { get; } = new ObservableCollectionExtended<ModListMetadataVM>();
+        private readonly SourceCache<ModListMetadataVM, string> _modLists = new(x => x.Metadata.Links.MachineURL);
+        public ReadOnlyObservableCollection<ModListMetadataVM> _filteredModLists;
+        public ReadOnlyObservableCollection<ModListMetadataVM> ModLists => _filteredModLists;
 
         private const string ALL_GAME_TYPE = "All";
 
-        [Reactive]
+        [Reactive] public IErrorResponse Error { get; set; }
-        public IErrorResponse Error { get; set; }
 
-        [Reactive]
+        [Reactive] public string Search { get; set; }
-        public string Search { get; set; }
 
-        [Reactive]
+        [Reactive] public bool OnlyInstalled { get; set; }
-        public bool OnlyInstalled { get; set; }
 
-        [Reactive]
+        [Reactive] public bool ShowNSFW { get; set; }
-        public bool ShowNSFW { get; set; }
 
-        [Reactive]
+        [Reactive] public bool ShowUtilityLists { get; set; }
-        public bool ShowUtilityLists { get; set; }
 
-        [Reactive]
+        [Reactive] public string GameType { get; set; }
-        public string GameType { get; set; }
 
-        public List<string> GameTypeEntries { get { return GetGameTypeEntries(); } }
+        public List<string> GameTypeEntries => GetGameTypeEntries();
 
-        private readonly ObservableAsPropertyHelper<bool> _Loaded;
+        private ObservableAsPropertyHelper<bool> _Loaded;
         private readonly Client _wjClient;
         private readonly ILogger<ModListGalleryVM> _logger;
         private readonly GameLocator _locator;
+        private readonly ModListDownloadMaintainer _maintainer;
 
-        private FiltersSettings settings => MWVM.Settings.Filters;
+        private FiltersSettings settings { get; set; } = new();
 
         public bool Loaded => _Loaded.Value;
 
-        public ICommand ClearFiltersCommand { get; }
+        public ICommand ClearFiltersCommand { get; set; }
 
-        public ModListGalleryVM(ILogger<ModListGalleryVM> logger, MainWindowVM mainWindowVM, Client wjClient,
+        public ModListGalleryVM(ILogger<ModListGalleryVM> logger, Client wjClient,
-            GameLocator locator, IServiceProvider provider)
+            GameLocator locator, SettingsManager settingsManager, ModListDownloadMaintainer maintainer)
-            : base(logger, mainWindowVM)
+            : base(logger)
         {
-            MWVM = mainWindowVM;
             _wjClient = wjClient;
             _logger = logger;
             _locator = locator;
-
+            _maintainer = maintainer;
-            // load persistent filter settings
+            
-            if (settings.IsPersistent)
-            {
-                GameType = !string.IsNullOrEmpty(settings.Game) ? settings.Game : ALL_GAME_TYPE;
-                ShowNSFW = settings.ShowNSFW;
-                ShowUtilityLists = settings.ShowUtilityLists;
-                OnlyInstalled = settings.OnlyInstalled;
-                Search = settings.Search;
-            }
-            else
-                GameType = ALL_GAME_TYPE;
-
-            // subscribe to save signal
-            MWVM.Settings.SaveSignal
-                .Subscribe(_ => UpdateFiltersSettings())
-                .DisposeWith(this.CompositeDisposable);
-
             ClearFiltersCommand = ReactiveCommand.Create(
                 () =>
                 {
@@ -97,101 +82,16 @@ namespace Wabbajack
                 });
 
 
-            this.WhenAny(x => x.OnlyInstalled)
+            this.WhenActivated(disposables =>
-                .Subscribe(val =>
+            {
-                {
+                var _ = LoadModLists();
-                    if(val)
+                
-                        GameType = ALL_GAME_TYPE;
+                _modLists.Connect()
-                })
+                    .ObserveOn(RxApp.MainThreadScheduler)
-                .DisposeWith(CompositeDisposable);
+                    .Bind(out _filteredModLists)
-
+                    .Subscribe()
-            var sourceList = Observable.Return(Unit.Default)
+                    .DisposeWith(disposables);
-                .ObserveOn(RxApp.TaskpoolScheduler)
+            });
-                .SelectMany(async _ =>
-                {
-                    try
-                    {
-                        Error = null;
-                        var list = await _wjClient.LoadLists();
-                        Error = ErrorResponse.Success;
-                        return list
-                            .AsObservableChangeSet(x => x.DownloadMetadata?.Hash ?? default);
-                    }
-                    catch (Exception ex)
-                    {
-                        _logger.LogError(ex, "While Loading Lists");
-                        Error = ErrorResponse.Fail(ex);
-                        return Observable.Empty<IChangeSet<ModlistMetadata, Hash>>();
-                    }
-                })
-                // Unsubscribe and release when not active
-                .FlowSwitch(
-                    this.WhenAny(x => x.IsActive),
-                    valueWhenOff: Observable.Return(ChangeSet<ModlistMetadata, Hash>.Empty))
-                .Switch()
-                .RefCount();
-
-            _Loaded = sourceList.CollectionCount()
-                .Select(c => c > 0)
-                .ToProperty(this, nameof(Loaded));
-
-            // Convert to VM and bind to resulting list
-            sourceList
-                .ObserveOnGuiThread()
-                .Transform(m => new ModListMetadataVM(provider.GetRequiredService<ILogger<ModListMetadataVM>>(),this, m,
-                    provider.GetRequiredService<ModListDownloadMaintainer>(), provider.GetRequiredService<Client>()))
-                .DisposeMany()
-                // Filter only installed
-                .Filter(this.WhenAny(x => x.OnlyInstalled)
-                    .Select<bool, Func<ModListMetadataVM, bool>>(onlyInstalled => (vm) =>
-                    {
-                        if (!onlyInstalled) return true;
-                        if (!GameRegistry.Games.TryGetValue(vm.Metadata.Game, out var gameMeta)) return false;
-                        return _locator.IsInstalled(gameMeta.Game);
-                    }))
-                // Filter on search box
-                .Filter(this.WhenAny(x => x.Search)
-                    .Debounce(TimeSpan.FromMilliseconds(150), RxApp.MainThreadScheduler)
-                    .Select<string, Func<ModListMetadataVM, bool>>(search => (vm) =>
-                    {
-                        if (string.IsNullOrWhiteSpace(search)) return true;
-                        return vm.Metadata.Title.ContainsCaseInsensitive(search) || vm.Metadata.tags.Any(t => t.ContainsCaseInsensitive(search));
-                    }))
-                .Filter(this.WhenAny(x => x.ShowNSFW)
-                    .Select<bool, Func<ModListMetadataVM, bool>>(showNSFW => vm =>
-                    {
-                        if (!vm.Metadata.NSFW) return true;
-                        return vm.Metadata.NSFW && showNSFW;
-                    }))
-                .Filter(this.WhenAny(x => x.ShowUtilityLists)
-                    .Select<bool, Func<ModListMetadataVM, bool>>(showUtilityLists => vm => showUtilityLists ? vm.Metadata.UtilityList : !vm.Metadata.UtilityList))
-                // Filter by Game
-                .Filter(this.WhenAny(x => x.GameType)
-                    .Debounce(TimeSpan.FromMilliseconds(150), RxApp.MainThreadScheduler)
-                    .Select<string, Func<ModListMetadataVM, bool>>(GameType => (vm) =>
-                    {
-                        if (GameType == ALL_GAME_TYPE)
-                            return true;
-                        if (string.IsNullOrEmpty(GameType))
-                            return false;
-
-                        return GameType == vm.Metadata.Game.GetDescription<Game>().ToString();
-
-                    }))
-                .Bind(ModLists)
-                .Subscribe()
-                .DisposeWith(CompositeDisposable);
-
-            // Extra GC when navigating away, just to immediately clean up modlist metadata
-            this.WhenAny(x => x.IsActive)
-                .Where(x => !x)
-                .Skip(1)
-                .Delay(TimeSpan.FromMilliseconds(50), RxApp.MainThreadScheduler)
-                .Subscribe(_ =>
-                {
-                    GC.Collect();
-                })
-                .DisposeWith(CompositeDisposable);
         }
 
         public override void Unload()
@@ -199,9 +99,30 @@ namespace Wabbajack
             Error = null;
         }
 
+        private async Task LoadModLists()
+        {
+            using var ll = LoadingLock.WithLoading();
+            try
+            {
+                var modLists = await _wjClient.LoadLists();
+                _modLists.Edit(e =>
+                {
+                    e.Clear();
+                    e.AddOrUpdate(modLists.Select(m =>
+                        new ModListMetadataVM(_logger, this, m, _maintainer, _wjClient)));
+                });
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "While loading lists");
+                ll.Fail();
+            }
+            ll.Succeed();
+        }
+
         private List<string> GetGameTypeEntries()
         {
-            List<string> gameEntries = new List<string> { ALL_GAME_TYPE };
+            List<string> gameEntries = new List<string> {ALL_GAME_TYPE};
             gameEntries.AddRange(GameRegistry.Games.Values.Select(gameType => gameType.HumanFriendlyGameName));
             gameEntries.Sort();
             return gameEntries;
@@ -216,4 +137,4 @@ namespace Wabbajack
             settings.OnlyInstalled = OnlyInstalled;
         }
     }
-}
+}

Wabbajack.App.Wpf/View Models/Gallery/ModListMetadataVM.cs

@@ -16,6 +16,7 @@ using Wabbajack.DTOs;
 using Wabbajack.DTOs.ServerResponses;
 using Wabbajack.Lib;
 using Wabbajack.Lib.Extensions;
+using Wabbajack.Messages;
 using Wabbajack.Networking.WabbajackClientApi;
 using Wabbajack.Paths;
 using Wabbajack.Paths.IO;
@@ -126,7 +127,7 @@ namespace Wabbajack
                         ArchiveStatus = a.Status,
                         IsFailing = a.Status != ArchiveStatus.InValid
                     }));
-                    _parent.MWVM.NavigateTo(_parent.MWVM.ModListContentsVM.Value);
+                    NavigateToGlobal.Send(NavigateToGlobal.ScreenType.ModListContents);
                 }
                 finally
                 {

Wabbajack.App.Wpf/View Models/Installers/InstallerVM.cs

@@ -15,6 +15,7 @@ using Microsoft.WindowsAPICodePack.Shell;
 using Wabbajack.DTOs.JsonConverters;
 using Wabbajack.Lib.Extensions;
 using Wabbajack.Lib.Interventions;
+using Wabbajack.Messages;
 using Wabbajack.RateLimiter;
 using Wabbajack.View_Models;
 using Wabbajack.Paths.IO;
@@ -98,7 +99,7 @@ public class InstallerVM : BackNavigatingVM, IBackNavigatingVM, ICpuStatusVM
     public ReactiveCommand<Unit, Unit> GoToInstallCommand { get; }
     public ReactiveCommand<Unit, Unit> BeginCommand { get; }
 
-    public InstallerVM(ILogger<InstallerVM> logger, MainWindowVM mainWindowVM, IServiceProvider serviceProvider) : base(logger, mainWindowVM)
+    public InstallerVM(ILogger<InstallerVM> logger, MainWindowVM mainWindowVM, IServiceProvider serviceProvider) : base(logger)
     {
         _logger = logger;
 
@@ -162,10 +163,7 @@ public class InstallerVM : BackNavigatingVM, IBackNavigatingVM, ICpuStatusVM
                 MWVM.Settings.Installer.LastInstalledListLocation = ModListLocation.TargetPath;
             })
             .DisposeWith(CompositeDisposable);
-
+        
-        _IsActive = this.ConstructIsActive(MWVM)
-            .ToGuiProperty(this, nameof(IsActive));
-
         // Active path represents the path to currently have loaded
         // If we're not actively showing, then "unload" the active path
         var activePath = Observable.CombineLatest(
@@ -239,7 +237,7 @@ public class InstallerVM : BackNavigatingVM, IBackNavigatingVM, ICpuStatusVM
             {
                 StartedInstallation = false;
                 Completed = null;
-                mainWindowVM.NavigateTo(mainWindowVM.ModeSelectionVM);
+                NavigateToGlobal.Send(NavigateToGlobal.ScreenType.ModeSelectionView);
             },
             canExecute: Observable.CombineLatest(
                     this.WhenAny(x => x.Installing)

Wabbajack.App.Wpf/View Models/MainWindowVM.cs

@@ -3,6 +3,7 @@ using ReactiveUI;
 using ReactiveUI.Fody.Helpers;
 using System;
 using System.Diagnostics;
+using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using System.Reflection;
 using System.Threading.Tasks;
@@ -14,6 +15,7 @@ using Wabbajack.Common;
 using Wabbajack.Downloaders.GameFile;
 using Wabbajack.Lib;
 using Wabbajack.Lib.Interventions;
+using Wabbajack.Messages;
 using Wabbajack.Networking.WabbajackClientApi;
 using Wabbajack.Paths;
 using Wabbajack.View_Models;
@@ -38,7 +40,7 @@ namespace Wabbajack
         public readonly Lazy<CompilerVM> Compiler;
         public readonly Lazy<InstallerVM> Installer;
         public readonly Lazy<SettingsVM> SettingsPane;
-        public readonly Lazy<ModListGalleryVM> Gallery;
+        public readonly ModListGalleryVM Gallery;
         public readonly ModeSelectionVM ModeSelectionVM;
         public readonly Lazy<ModListContentsVM> ModListContentsVM;
         public readonly UserInterventionHandlers UserInterventionHandlers;
@@ -55,7 +57,7 @@ namespace Wabbajack
         public bool UpdateAvailable { get; private set; }
 
         public MainWindowVM(ILogger<MainWindowVM> logger, MainSettings settings, Client wjClient,
-            IServiceProvider serviceProvider)
+            IServiceProvider serviceProvider, ModeSelectionVM modeSelectionVM, ModListGalleryVM modListGalleryVM)
         {
             _logger = logger;
             _wjClient = wjClient;
@@ -64,12 +66,15 @@ namespace Wabbajack
             Installer = new Lazy<InstallerVM>(() => new InstallerVM(serviceProvider.GetRequiredService<ILogger<InstallerVM>>(), this, serviceProvider));
             Compiler = new Lazy<CompilerVM>(() => new CompilerVM(serviceProvider.GetRequiredService<ILogger<CompilerVM>>(), this));
             SettingsPane = new Lazy<SettingsVM>(() => new SettingsVM(serviceProvider.GetRequiredService<ILogger<SettingsVM>>(), this, serviceProvider));
-            Gallery = new Lazy<ModListGalleryVM>(() => new ModListGalleryVM(serviceProvider.GetRequiredService<ILogger<ModListGalleryVM>>(), this, 
+            Gallery = modListGalleryVM;
-                serviceProvider.GetRequiredService<Client>(), serviceProvider.GetRequiredService<GameLocator>(), serviceProvider));
+            ModeSelectionVM = modeSelectionVM;
-            ModeSelectionVM = new ModeSelectionVM(this);
             ModListContentsVM = new Lazy<ModListContentsVM>(() => new ModListContentsVM(serviceProvider.GetRequiredService<ILogger<ModListContentsVM>>(), this));
             UserInterventionHandlers = new UserInterventionHandlers(serviceProvider.GetRequiredService<ILogger<UserInterventionHandlers>>(), this);
 
+            MessageBus.Current.Listen<NavigateToGlobal>()
+                .Subscribe(m => HandleNavigateTo(m.Screen))
+                .DisposeWith(CompositeDisposable);
+            
             // Set up logging
             /* TODO
             Utils.LogMessages
@@ -116,12 +121,12 @@ namespace Wabbajack
             if (IsStartingFromModlist(out var path))
             {
                 Installer.Value.ModListLocation.TargetPath = path;
-                NavigateTo(Installer.Value);
+                NavigateToGlobal.Send(NavigateToGlobal.ScreenType.Installer);
             }
             else
             {
                 // Start on mode selection
-                NavigateTo(ModeSelectionVM);
+                NavigateToGlobal.Send(NavigateToGlobal.ScreenType.ModeSelectionView);
             }
 
             try
@@ -147,7 +152,19 @@ namespace Wabbajack
             OpenSettingsCommand = ReactiveCommand.Create(
                 canExecute: this.WhenAny(x => x.ActivePane)
                     .Select(active => !SettingsPane.IsValueCreated || !object.ReferenceEquals(active, SettingsPane.Value)),
-                execute: () => NavigateTo(SettingsPane.Value));
+                execute: () => NavigateToGlobal.Send(NavigateToGlobal.ScreenType.Settings));
+        }
+
+        private void HandleNavigateTo(NavigateToGlobal.ScreenType s)
+        {
+            ActivePane = s switch
+            {
+                NavigateToGlobal.ScreenType.ModeSelectionView => ModeSelectionVM,
+                NavigateToGlobal.ScreenType.ModListGallery => Gallery,
+                NavigateToGlobal.ScreenType.Installer => Installer.Value,
+                NavigateToGlobal.ScreenType.Settings => SettingsPane.Value,
+                _ => ActivePane
+            };
         }
 
         private static bool IsStartingFromModlist(out AbsolutePath modlistPath)
@@ -171,21 +188,23 @@ namespace Wabbajack
             if (path == default) return;
             var installer = Installer.Value;
             Settings.Installer.LastInstalledListLocation = path;
-            NavigateTo(installer);
+            NavigateToGlobal.Send(NavigateToGlobal.ScreenType.Installer);
             installer.ModListLocation.TargetPath = path;
         }
 
+        /*
         public void NavigateTo(ViewModel vm)
         {
             ActivePane = vm;
-        }
+        }*/
 
+        /*
         public void NavigateTo<T>(T vm)
             where T : ViewModel, IBackNavigatingVM
         {
             vm.NavigateBackTarget = ActivePane;
             ActivePane = vm;
-        }
+        }*/
 
         public async Task ShutdownApplication()
         {

Wabbajack.App.Wpf/View Models/ModListContentsVM.cs

@@ -31,7 +31,7 @@ namespace Wabbajack.View_Models
         private static readonly Regex NameMatcher = new(@"(?<=\.)[^\.]+(?=\+State)", RegexOptions.Compiled);
         private readonly ILogger<ModListContentsVM> _logger;
 
-        public ModListContentsVM(ILogger<ModListContentsVM> logger, MainWindowVM mwvm) : base(logger, mwvm)
+        public ModListContentsVM(ILogger<ModListContentsVM> logger, MainWindowVM mwvm) : base(logger)
         {
             _logger = logger;
             _mwvm = mwvm;

Wabbajack.App.Wpf/View Models/ModeSelectionVM.cs

@@ -8,6 +8,7 @@ using System.Reactive.Linq;
 using System.Windows.Input;
 using Wabbajack.Common;
 using Wabbajack.Lib;
+using Wabbajack.Messages;
 using Wabbajack.Paths.IO;
 
 namespace Wabbajack
@@ -20,23 +21,23 @@ namespace Wabbajack
         public ICommand CompileCommand { get; }
         public ReactiveCommand<Unit, Unit> UpdateCommand { get; }
 
-        public ModeSelectionVM(MainWindowVM mainVM)
+        public ModeSelectionVM()
         {
-            _mainVM = mainVM;
-
             InstallCommand = ReactiveCommand.Create(
                 execute: () =>
                 {
+                    /* TODO 
                     var path = mainVM.Settings.Installer.LastInstalledListLocation;
                     if (path == default || !path.FileExists())
                     {
                         path = UIUtils.OpenFileDialog($"*{Ext.Wabbajack}|*{Ext.Wabbajack}");
                     }
                     _mainVM.OpenInstaller(path);
+                    */
                 });
 
-            CompileCommand = ReactiveCommand.Create(() => mainVM.NavigateTo(mainVM.Compiler.Value));
+            CompileCommand = ReactiveCommand.Create(() => NavigateToGlobal.Send(NavigateToGlobal.ScreenType.Compiler));
-            BrowseCommand = ReactiveCommand.Create(() => mainVM.NavigateTo(mainVM.Gallery.Value));
+            BrowseCommand = ReactiveCommand.Create(() => NavigateToGlobal.Send(NavigateToGlobal.ScreenType.ModListGallery));
         }
     }
 }

Wabbajack.App.Wpf/View Models/Settings/AuthorFilesVM.cs

@@ -34,7 +34,7 @@ namespace Wabbajack.View_Models.Settings
         private readonly Client _wjClient;
         private IObservable<bool> IsUploading { get; }
 
-        public AuthorFilesVM(ILogger<AuthorFilesVM> logger, WabbajackApiTokenProvider token, Client wjClient, SettingsVM vm) : base(logger, vm.MWVM)
+        public AuthorFilesVM(ILogger<AuthorFilesVM> logger, WabbajackApiTokenProvider token, Client wjClient, SettingsVM vm) : base(logger)
         {
             _token = token;
             _wjClient = wjClient;

Wabbajack.App.Wpf/View Models/Settings/LoginManagerVM.cs

@@ -20,7 +20,7 @@ namespace Wabbajack
         public List<LoginTargetVM> Downloaders { get; }
 
         public LoginManagerVM(ILogger<LoginManagerVM> logger, SettingsVM settingsVM)
-            : base(logger, settingsVM.MWVM)
+            : base(logger)
         {
             /*
             Downloaders = DownloadDispatcher.Downloaders

Wabbajack.App.Wpf/View Models/Settings/SettingsVM.cs

@@ -28,7 +28,7 @@ namespace Wabbajack
         public ICommand OpenTerminalCommand { get; }
 
         public SettingsVM(ILogger<SettingsVM> logger, MainWindowVM mainWindowVM, IServiceProvider provider)
-            : base(logger, mainWindowVM)
+            : base(logger)
         {
             MWVM = mainWindowVM;
             Login = new LoginManagerVM(provider.GetRequiredService<ILogger<LoginManagerVM>>(), this);

Wabbajack.App.Wpf/View Models/UserInterventionHandlers.cs

@@ -7,6 +7,7 @@ using ReactiveUI;
 using Wabbajack.Common;
 using Wabbajack.Lib;
 using Wabbajack.Lib.Interventions;
+using Wabbajack.Messages;
 
 namespace Wabbajack
 {
@@ -28,11 +29,11 @@ namespace Wabbajack
             var cancel = new CancellationTokenSource();
             var oldPane = MainWindow.ActivePane;
             using var vm = await WebBrowserVM.GetNew(_logger);
-            MainWindow.NavigateTo(vm);
+            NavigateTo.Send(vm);
             vm.BackCommand = ReactiveCommand.Create(() =>
             {
                 cancel.Cancel();
-                MainWindow.NavigateTo(oldPane);
+                NavigateTo.Send(oldPane);
                 intervention.Cancel();
             });
 
@@ -54,7 +55,7 @@ namespace Wabbajack
                 wait.Dispose();
             }
 
-            MainWindow.NavigateTo(oldPane);
+            NavigateTo.Send(oldPane);
         }
 
         public async Task Handle(IStatusMessage msg)

Wabbajack.App.Wpf/Views/ModListGalleryView.xaml.cs

@@ -19,19 +19,19 @@ namespace Wabbajack
                 this.WhenAny(x => x.ViewModel.ModLists)
                     .BindToStrict(this, x => x.ModListGalleryControl.ItemsSource)
                     .DisposeWith(dispose);
-                Observable.CombineLatest(
+                
-                        this.WhenAny(x => x.ViewModel.Error),
+                this.WhenAny(x => x.ViewModel.LoadingLock.IsLoading)
-                        this.WhenAny(x => x.ViewModel.Loaded),
-                        resultSelector: (err, loaded) =>
-                        {
-                            if (!err?.Succeeded ?? false) return true;
-                            return !loaded;
-                        })
-                    .DistinctUntilChanged()
                     .Select(x => x ? Visibility.Visible : Visibility.Collapsed)
                     .StartWith(Visibility.Collapsed)
-                    .BindToStrict(this, x => x.LoadingRing.Visibility)
+                    .BindTo(this, x => x.LoadingRing.Visibility)
                     .DisposeWith(dispose);
+                
+                this.WhenAny(x => x.ViewModel.LoadingLock.ErrorState)
+                    .Select(e => (e?.Succeeded ?? true) ? Visibility.Collapsed : Visibility.Visible)
+                    .StartWith(Visibility.Collapsed)
+                    .BindToStrict(this, x => x.ErrorIcon.Visibility)
+                    .DisposeWith(dispose);
+
                 Observable.CombineLatest(
                         this.WhenAny(x => x.ViewModel.ModLists.Count)
                             .Select(x => x > 0),
@@ -45,11 +45,7 @@ namespace Wabbajack
                     .StartWith(Visibility.Collapsed)
                     .BindToStrict(this, x => x.NoneFound.Visibility)
                     .DisposeWith(dispose);
-                this.WhenAny(x => x.ViewModel.Error)
+
-                    .Select(e => (e?.Succeeded ?? true) ? Visibility.Collapsed : Visibility.Visible)
-                    .StartWith(Visibility.Collapsed)
-                    .BindToStrict(this, x => x.ErrorIcon.Visibility)
-                    .DisposeWith(dispose);
 
                 this.BindStrict(ViewModel, vm => vm.Search, x => x.SearchBox.Text)
                     .DisposeWith(dispose);

Wabbajack.App.Wpf/Wabbajack.csproj

@@ -60,7 +60,7 @@
       <PackageReference Include="CefSharp.Wpf" Version="91.1.230">
         <NoWarn>NU1701</NoWarn>
       </PackageReference>
-    <PackageReference Include="DynamicData" Version="7.2.1" />
+    <PackageReference Include="DynamicData" Version="7.3.1" />
     <PackageReference Include="Extended.Wpf.Toolkit" Version="4.1.0">
       <NoWarn>NU1701</NoWarn>
     </PackageReference>
@@ -78,9 +78,9 @@
     <PackageReference Include="Microsoft-WindowsAPICodePack-Shell" Version="1.1.4" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="6.0.0" />
     <PackageReference Include="PInvoke.User32" Version="0.7.104" />
-    <PackageReference Include="ReactiveUI" Version="14.1.1" />
+    <PackageReference Include="ReactiveUI" Version="16.2.6" />
-    <PackageReference Include="ReactiveUI.Fody" Version="14.1.1" />
+    <PackageReference Include="ReactiveUI.Fody" Version="16.2.6" />
-    <PackageReference Include="ReactiveUI.WPF" Version="14.1.1" />
+    <PackageReference Include="ReactiveUI.WPF" Version="16.2.6" />
     <PackageReference Include="Silk.NET.DXGI" Version="2.6.0" />
     <PackageReference Include="WPFThemes.DarkBlend" Version="1.0.8" />
   </ItemGroup>
@@ -104,4 +104,8 @@
     <SplashScreen Include="Resources\Wabba_Mouth_Small.png" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Folder Include="Models" />
+  </ItemGroup>
+
 </Project>

Wabbajack.App/Controls/BrowseItemViewModel.cs

@@ -1,5 +1,4 @@
 using System;
-using System.IO;
 using System.Linq;
 using System.Net.Http;
 using System.Reactive;

Wabbajack.Lib/Error States/ErrorResponse.cs

@@ -4,8 +4,8 @@ namespace Wabbajack
 {
     public struct ErrorResponse : IErrorResponse
     {
-        public readonly static ErrorResponse Success = Succeed();
+        public static readonly ErrorResponse Success = Succeed();
-        public readonly static ErrorResponse Failure = new ErrorResponse();
+        public static readonly ErrorResponse Failure = new ErrorResponse();
 
         public bool Succeeded { get; }
         public Exception? Exception { get; }

Wabbajack.Lib/LoadingLock.cs

@@ -0,0 +1,74 @@
+using System;
+using System.Reactive.Disposables;
+using ReactiveUI;
+using ReactiveUI.Fody.Helpers;
+
+namespace Wabbajack.Models;
+
+public class LoadingLock : ReactiveObject, IDisposable
+{
+    private readonly CompositeDisposable _disposable;
+    
+    public ErrorResponse? ErrorState { get; set; }
+
+    public LoadingLock()
+    {
+        _disposable = new CompositeDisposable();
+
+        this.WhenAnyValue(vm => vm.LoadLevel)
+            .Subscribe(v => IsLoading = v > 0)
+            .DisposeWith(_disposable);
+    }
+
+    [Reactive] public int LoadLevel { get; private set; }
+
+    [Reactive] public bool IsLoading { get; private set; }
+
+    public void Dispose()
+    {
+        GC.SuppressFinalize(this);
+        _disposable.Dispose();
+    }
+
+    public LockContext WithLoading()
+    {
+        RxApp.MainThreadScheduler.Schedule(0, (_, _) => { LoadLevel++;
+            return Disposable.Empty;
+        });
+        return new LockContext(this);
+    }
+
+    public class LockContext : IDisposable
+    {
+        private readonly LoadingLock _parent;
+        private bool _disposed;
+
+        public LockContext(LoadingLock parent)
+        {
+            _parent = parent;
+            _disposed = false;
+        }
+
+        public void Succeed()
+        {
+            _parent.ErrorState = ErrorResponse.Success;
+            Dispose();
+        }
+
+        public void Fail()
+        {
+            _parent.ErrorState = ErrorResponse.Failure;
+            Dispose();
+        }
+
+        public void Dispose()
+        {
+            if (_disposed) return;
+            _disposed = true;
+            
+            RxApp.MainThreadScheduler.Schedule(0, (_, _) => { _parent.LoadLevel--;
+                return Disposable.Empty;
+            });
+        }
+    }
+}

Wabbajack.Lib/ViewModel.cs

@@ -4,15 +4,18 @@ using System;
 using System.Collections.Generic;
 using System.Reactive.Disposables;
 using System.Runtime.CompilerServices;
+using Wabbajack.Models;
 
 namespace Wabbajack.Lib
 {
-    public class ViewModel : ReactiveObject, IDisposable
+    public class ViewModel : ReactiveObject, IDisposable, IActivatableViewModel
     {
-        private readonly Lazy<CompositeDisposable> _compositeDisposable = new Lazy<CompositeDisposable>();
+        private readonly Lazy<CompositeDisposable> _compositeDisposable = new();
         [JsonIgnore]
         public CompositeDisposable CompositeDisposable => _compositeDisposable.Value;
 
+        [JsonIgnore] public LoadingLock LoadingLock { get; } = new();
+
         public virtual void Dispose()
         {
             if (_compositeDisposable.IsValueCreated)
@@ -30,5 +33,7 @@ namespace Wabbajack.Lib
             item = newItem;
             this.RaisePropertyChanged(propertyName);
         }
+
+        public ViewModelActivator Activator { get; } = new();
     }
 }

Wabbajack.Lib/Wabbajack.Lib.csproj

@@ -35,10 +35,10 @@
         <Version>0.50.0</Version>
       </PackageReference>
       <PackageReference Include="ReactiveUI">
-        <Version>14.1.1</Version>
+        <Version>16.2.6</Version>
       </PackageReference>
       <PackageReference Include="ReactiveUI.Fody">
-        <Version>14.1.1</Version>
+        <Version>16.2.6</Version>
       </PackageReference>
       <PackageReference Include="SharpCompress">
         <Version>0.28.3</Version>