Add directional navigation to image viewer

StabilityMatrix.Avalonia/Controls/CheckerboardBorder.cs

@@ -0,0 +1,94 @@
+using System.Diagnostics.CodeAnalysis;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Media;
+
+namespace StabilityMatrix.Avalonia.Controls;
+
+[SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
+public class CheckerboardBorder : Control
+{
+    public static readonly StyledProperty<byte> GridCellSizeProperty = AvaloniaProperty.Register<
+        AdvancedImageBox,
+        byte
+    >(nameof(GridCellSize), 15);
+
+    public byte GridCellSize
+    {
+        get => GetValue(GridCellSizeProperty);
+        set => SetValue(GridCellSizeProperty, value);
+    }
+
+    public static readonly StyledProperty<ISolidColorBrush> GridColorProperty =
+        AvaloniaProperty.Register<AdvancedImageBox, ISolidColorBrush>(
+            nameof(GridColor),
+            SolidColorBrush.Parse("#181818")
+        );
+
+    /// <summary>
+    /// Gets or sets the color used to create the checkerboard style background
+    /// </summary>
+    public ISolidColorBrush GridColor
+    {
+        get => GetValue(GridColorProperty);
+        set => SetValue(GridColorProperty, value);
+    }
+
+    public static readonly StyledProperty<ISolidColorBrush> GridColorAlternateProperty =
+        AvaloniaProperty.Register<AdvancedImageBox, ISolidColorBrush>(
+            nameof(GridColorAlternate),
+            SolidColorBrush.Parse("#252525")
+        );
+
+    /// <summary>
+    /// Gets or sets the color used to create the checkerboard style background
+    /// </summary>
+    public ISolidColorBrush GridColorAlternate
+    {
+        get => GetValue(GridColorAlternateProperty);
+        set => SetValue(GridColorAlternateProperty, value);
+    }
+
+    static CheckerboardBorder()
+    {
+        AffectsRender<CheckerboardBorder>(GridCellSizeProperty);
+        AffectsRender<CheckerboardBorder>(GridColorProperty);
+        AffectsRender<CheckerboardBorder>(GridColorAlternateProperty);
+    }
+
+    /// <inheritdoc />
+    public override void Render(DrawingContext context)
+    {
+        var size = GridCellSize;
+
+        var square1Drawing = new GeometryDrawing
+        {
+            Brush = GridColorAlternate,
+            Geometry = new RectangleGeometry(new Rect(0.0, 0.0, size, size))
+        };
+
+        var square2Drawing = new GeometryDrawing
+        {
+            Brush = GridColorAlternate,
+            Geometry = new RectangleGeometry(new Rect(size, size, size, size))
+        };
+
+        var drawingGroup = new DrawingGroup { Children = { square1Drawing, square2Drawing } };
+
+        var tileBrush = new DrawingBrush(drawingGroup)
+        {
+            AlignmentX = AlignmentX.Left,
+            AlignmentY = AlignmentY.Top,
+            DestinationRect = new RelativeRect(new Size(2 * size, 2 * size), RelativeUnit.Absolute),
+            Stretch = Stretch.None,
+            TileMode = TileMode.Tile,
+        };
+
+        context.FillRectangle(GridColor, Bounds);
+        // context.DrawRectangle(new Pen(Brushes.Blue), new Rect(0.5, 0.5, Bounds.Width - 1.0, Bounds.Height - 1.0));
+
+        context.FillRectangle(tileBrush, Bounds);
+
+        // base.Render(context);
+    }
+}

StabilityMatrix.Avalonia/Controls/ImageFolderCard.axaml

@@ -72,7 +72,7 @@
                             <ItemsRepeater
                                 HorizontalAlignment="Center"
                                 VerticalAlignment="Stretch"
-                                VerticalCacheLength="16"
+                                VerticalCacheLength="8"
                                 ItemsSource="{Binding LocalImages}">
                                 
                                 <ItemsRepeater.Resources>

StabilityMatrix.Avalonia/Models/DirectionalNavigationEventArgs.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Numerics;
+
+namespace StabilityMatrix.Avalonia.Models;
+
+public class DirectionalNavigationEventArgs : EventArgs
+{
+    private Vector2 Direction { get; }
+
+    public DirectionalNavigationEventArgs(Vector2 direction)
+    {
+        Direction = direction;
+    }
+
+    public static DirectionalNavigationEventArgs Up => new(new Vector2(0, -1));
+    public static DirectionalNavigationEventArgs Down => new(new Vector2(0, 1));
+
+    public bool IsNext => Direction.X > 0 || Direction.Y > 0;
+    public bool IsPrevious => Direction.X < 0 || Direction.Y < 0;
+}

StabilityMatrix.Avalonia/Styles/ThemeMaterials.axaml

@@ -1,6 +1,45 @@
 <ResourceDictionary xmlns="https://github.com/avaloniaui"
-                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
-    <!-- Add Resources Here -->
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:sty="clr-namespace:FluentAvalonia.Styling;assembly=FluentAvalonia">
+    
+    <ResourceDictionary.ThemeDictionaries>
+        <ResourceDictionary x:Key="Default">
+            <ExperimentalAcrylicMaterial
+                x:Key="ThemeDarkAcrylicMaterial"
+                FallbackColor="{DynamicResource ThemeBackgroundColor}"
+                TintColor="Black"
+                TintOpacity="0.78"
+                MaterialOpacity="0.9"
+                BackgroundSource="Digger" />
+    
+            <ExperimentalAcrylicMaterial
+                x:Key="ThemeTransparentAcrylicMaterial"
+                FallbackColor="{DynamicResource ThemeBackgroundColor}"
+                TintColor="{DynamicResource ThemeBackgroundColor}"
+                TintOpacity="0.7"
+                MaterialOpacity="0.5"
+                BackgroundSource="Digger" />
+        </ResourceDictionary>
+        
+        <ResourceDictionary x:Key="Dark">
+            <ExperimentalAcrylicMaterial
+                x:Key="ThemeDarkAcrylicMaterial"
+                FallbackColor="{DynamicResource ThemeBackgroundColor}"
+                TintColor="Black"
+                TintOpacity="0.78"
+                MaterialOpacity="0.9"
+                BackgroundSource="Digger" />
+    
+            <ExperimentalAcrylicMaterial
+                x:Key="ThemeTransparentAcrylicMaterial"
+                FallbackColor="{DynamicResource ThemeBackgroundColor}"
+                TintColor="Black"
+                TintOpacity="0.7"
+                MaterialOpacity="0.5"
+                BackgroundSource="Digger" />
+        </ResourceDictionary>
+        
+        <ResourceDictionary x:Key="{x:Static sty:FluentAvaloniaTheme.HighContrastTheme}">
             <ExperimentalAcrylicMaterial
                 x:Key="ThemeDarkAcrylicMaterial"
                 FallbackColor="{DynamicResource ThemeBackgroundColor}"
@@ -16,4 +55,6 @@
                 TintOpacity="0.7"
                 MaterialOpacity="0.5"
                 BackgroundSource="Digger" />
+        </ResourceDictionary>
+    </ResourceDictionary.ThemeDictionaries>
 </ResourceDictionary>

StabilityMatrix.Avalonia/ViewModels/Dialogs/ImageViewerViewModel.cs

@@ -1,4 +1,6 @@
-using CommunityToolkit.Mvvm.ComponentModel;
+using System;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
 using StabilityMatrix.Avalonia.Models;
 using StabilityMatrix.Avalonia.ViewModels.Base;
 using StabilityMatrix.Avalonia.Views.Dialogs;
@@ -29,6 +31,8 @@ public partial class ImageViewerViewModel : ContentDialogViewModelBase
     [ObservableProperty]
     private string? imageSizeText;
 
+    public event EventHandler<DirectionalNavigationEventArgs>? NavigationRequested;
+
     partial void OnLocalImageFileChanged(LocalImageFile? value)
     {
         if (value?.ImageSize is { IsEmpty: false } size)
@@ -45,4 +49,16 @@ public partial class ImageViewerViewModel : ContentDialogViewModelBase
             FileSizeText = Size.FormatBase10Bytes(localFile.GetSize(true));
         }
     }
+
+    [RelayCommand]
+    private void OnNavigateNext()
+    {
+        NavigationRequested?.Invoke(this, DirectionalNavigationEventArgs.Up);
+    }
+
+    [RelayCommand]
+    private void OnNavigatePrevious()
+    {
+        NavigationRequested?.Invoke(this, DirectionalNavigationEventArgs.Down);
+    }
 }

StabilityMatrix.Avalonia/ViewModels/Inference/ImageFolderCardViewModel.cs

@@ -8,10 +8,12 @@ using Avalonia.Controls.Notifications;
 using Avalonia.Controls.Primitives;
 using Avalonia.Input;
 using Avalonia.Platform.Storage;
+using Avalonia.Threading;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using DynamicData;
 using DynamicData.Binding;
+using FluentAvalonia.UI.Navigation;
 using FuzzySharp;
 using FuzzySharp.PreProcess;
 using FuzzySharp.SimilarityRatio.Scorer.Composite;
@@ -132,10 +134,51 @@ public partial class ImageFolderCardViewModel : ViewModelBase
             return;
         }
 
+        var currentIndex = LocalImages.IndexOf(item);
+
         var image = new ImageSource(new FilePath(imagePath));
+
         // Preload
         await image.GetBitmapAsync();
 
+        var vm = new ImageViewerViewModel { ImageSource = image, LocalImageFile = item };
+
+        using var onNext = Observable
+            .FromEventPattern<DirectionalNavigationEventArgs>(
+                vm,
+                nameof(ImageViewerViewModel.NavigationRequested)
+            )
+            .Subscribe(ctx =>
+            {
+                Dispatcher.UIThread
+                    .InvokeAsync(async () =>
+                    {
+                        var sender = (ImageViewerViewModel)ctx.Sender!;
+                        var newIndex = currentIndex + (ctx.EventArgs.IsNext ? 1 : -1);
+
+                        if (newIndex >= 0 && newIndex < LocalImages.Count)
+                        {
+                            var newImage = LocalImages[newIndex];
+                            var newImageSource = new ImageSource(
+                                new FilePath(newImage.GetFullPath(settingsManager.ImagesDirectory))
+                            );
+
+                            // Preload
+                            await newImageSource.GetBitmapAsync();
+
+                            var oldImageSource = sender.ImageSource;
+
+                            sender.ImageSource = newImageSource;
+                            sender.LocalImageFile = newImage;
+
+                            // oldImageSource?.Dispose();
+
+                            currentIndex = newIndex;
+                        }
+                    })
+                    .SafeFireAndForget();
+            });
+
         var dialog = new BetterContentDialog
         {
             MaxDialogWidth = 1000,
@@ -148,11 +191,7 @@ public partial class ImageFolderCardViewModel : ViewModelBase
             {
                 Width = 1000,
                 Height = 1000,
-                DataContext = new ImageViewerViewModel
-                {
-                    ImageSource = image,
-                    LocalImageFile = item
-                }
+                DataContext = vm
             }
         };
 

StabilityMatrix.Avalonia/Views/Dialogs/ImageViewerDialog.axaml

@@ -16,27 +16,37 @@
     x:DataType="vmDialogs:ImageViewerViewModel"
     mc:Ignorable="d">
 
+    <controls:UserControlBase.KeyBindings>
+        <KeyBinding Gesture="Up" Command="{Binding NavigateNextCommand}"/>
+        <KeyBinding Gesture="Down" Command="{Binding NavigatePreviousCommand}"/>
+    </controls:UserControlBase.KeyBindings>
+    
     <Grid
         HorizontalAlignment="Stretch"
         VerticalAlignment="Stretch"
         RowDefinitions="*,Auto">
 
-        <controls:AdvancedImageBox Image="{Binding ImageSource.BitmapAsync^}" SizeMode="Fit" />
+        <controls:AdvancedImageBox 
+            Image="{Binding ImageSource.BitmapAsync^}" 
+            SizeMode="Fit" />
 
         <!--  Close button  -->
         <Grid
             Grid.Row="0"
             HorizontalAlignment="Right"
             VerticalAlignment="Top">
+            <UniformGrid Rows="3">
                 <Button
                     Margin="0,8,8,0"
+                    Padding="8"
                     icons:Attached.Icon="fa-solid fa-xmark"
-                Classes="transparent"
+                    Classes="transparent-full"
                     Command="{Binding OnCloseButtonClick}" />
+            </UniformGrid>
         </Grid>
 
         <!--  Footer  -->
-        <Border
+        <!--<Border
             Grid.Row="1"
             MinHeight="20"
             Background="Transparent"
@@ -57,14 +67,12 @@
                     FontSize="13"
                     Text="{Binding FileSizeText}" />
             </UniformGrid>
-        </Border>
-        <!--<ExperimentalAcrylicBorder
+        </Border>-->
+        <ExperimentalAcrylicBorder
             Grid.Row="1"
-            MinHeight="20"
-            Padding="4,0,0,0"
+            Padding="4,0,4,0"
             VerticalAlignment="Bottom"
-            Material="{StaticResource ThemeTransparentAcrylicMaterial}"
-            Opacity="0.9">
+            Material="{StaticResource ThemeDarkAcrylicMaterial}">
             <UniformGrid Columns="3" Margin="4">
                 <TextBlock
                     FontSize="13"
@@ -80,7 +88,7 @@
                     HorizontalAlignment="Right"
                     Text="{Binding FileSizeText}"/>
             </UniformGrid>
-        </ExperimentalAcrylicBorder>-->
+        </ExperimentalAcrylicBorder>
 
         <!--  The preview tracker  -->
         <!--<Image

StabilityMatrix.Avalonia/Views/Dialogs/ImageViewerDialog.axaml.cs

@@ -1,13 +1,25 @@
-using Avalonia.Controls;
-using Avalonia.Controls.Primitives;
+using Avalonia;
+using Avalonia.Controls;
 using Avalonia.Input;
-using Avalonia.Interactivity;
-using StabilityMatrix.Avalonia.ViewModels.Base;
 
 namespace StabilityMatrix.Avalonia.Views.Dialogs;
 
 public partial class ImageViewerDialog : UserControl
 {
+    public static readonly StyledProperty<bool> IsFooterEnabledProperty = AvaloniaProperty.Register<
+        ImageViewerDialog,
+        bool
+    >("IsFooterEnabled");
+
+    /// <summary>
+    /// Whether the footer with file name / size will be shown.
+    /// </summary>
+    public bool IsFooterEnabled
+    {
+        get => GetValue(IsFooterEnabledProperty);
+        set => SetValue(IsFooterEnabledProperty, value);
+    }
+
     public ImageViewerDialog()
     {
         InitializeComponent();