[GUI] Add grid settings to GUI and implement grid snapping

src/SharpEmu.GUI/GameLibraryCache.cs

@@ -1,168 +0,0 @@
-// Copyright (C) 2026 SharpEmu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-using System.Collections.Generic;
-using System.IO;
-using System.Text.Json;
-using System.Text.Json.Serialization;
-
-namespace SharpEmu.GUI;
-
-/// <summary>
-/// Remembers the last completed library scan so a cold start can paint the
-/// grid immediately instead of waiting on a recursive walk of every game
-/// folder. The cache is a display seed, never an authority: startup still
-/// runs the normal scan and reconciles over it, so a stale file can only
-/// ever cost one frame of wrong content, not a wrong library.
-/// </summary>
-internal static class GameLibraryCache
-{
-    private const int CurrentVersion = 1;
-
-    private static readonly JsonSerializerOptions SerializerOptions = new()
-    {
-        WriteIndented = true,
-        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
-    };
-
-    internal static string CachePath =>
-        Path.Combine(AppContext.BaseDirectory, "user", "library_cache.json");
-
-    internal sealed class CachedGame
-    {
-        public string Name { get; set; } = string.Empty;
-        public string? TitleId { get; set; }
-        public string? Version { get; set; }
-        public string Path { get; set; } = string.Empty;
-        public long SizeBytes { get; set; }
-        public string? CoverPath { get; set; }
-        public string? BackgroundPath { get; set; }
-    }
-
-    internal sealed class CacheDocument
-    {
-        public int Version { get; set; }
-        public List<string> Folders { get; set; } = [];
-        public List<CachedGame> Games { get; set; } = [];
-    }
-
-    /// <summary>
-    /// Returns the cached games when the file matches the configured folder
-    /// set and the executables still exist. Entries whose executable is gone
-    /// are dropped so a removed game never flashes on screen.
-    /// </summary>
-    internal static List<GameEntry> Load(IReadOnlyList<string> folders)
-    {
-        var games = new List<GameEntry>();
-        try
-        {
-            if (!File.Exists(CachePath))
-            {
-                return games;
-            }
-
-            var document = JsonSerializer.Deserialize<CacheDocument>(
-                File.ReadAllText(CachePath),
-                SerializerOptions);
-            if (document is null || document.Version != CurrentVersion)
-            {
-                return games;
-            }
-
-            if (!SameFolders(document.Folders, folders))
-            {
-                return games;
-            }
-
-            foreach (var cached in document.Games)
-            {
-                if (string.IsNullOrWhiteSpace(cached.Path) || !File.Exists(cached.Path))
-                {
-                    continue;
-                }
-
-                games.Add(new GameEntry(
-                    cached.Name,
-                    cached.TitleId,
-                    cached.Version,
-                    cached.Path,
-                    cached.SizeBytes,
-                    Existing(cached.CoverPath),
-                    Existing(cached.BackgroundPath)));
-            }
-        }
-        catch (Exception exception)
-        {
-            Console.Error.WriteLine(
-                $"[GUI][WARN] Could not read the library cache: {exception.Message}");
-            games.Clear();
-        }
-
-        return games;
-    }
-
-    internal static void Save(IReadOnlyList<string> folders, IReadOnlyList<GameEntry> games)
-    {
-        try
-        {
-            var directory = Path.GetDirectoryName(CachePath);
-            if (!string.IsNullOrEmpty(directory))
-            {
-                Directory.CreateDirectory(directory);
-            }
-
-            var document = new CacheDocument
-            {
-                Version = CurrentVersion,
-                Folders = [.. folders],
-            };
-
-            foreach (var game in games)
-            {
-                document.Games.Add(new CachedGame
-                {
-                    Name = game.Name,
-                    TitleId = game.TitleId,
-                    Version = game.Version,
-                    Path = game.Path,
-                    SizeBytes = game.SizeBytes,
-                    CoverPath = game.CoverPath,
-                    BackgroundPath = game.BackgroundPath,
-                });
-            }
-
-            File.WriteAllText(
-                CachePath,
-                JsonSerializer.Serialize(document, SerializerOptions));
-        }
-        catch (Exception exception)
-        {
-            Console.Error.WriteLine(
-                $"[GUI][WARN] Could not write the library cache: {exception.Message}");
-        }
-    }
-
-    private static string? Existing(string? path) =>
-        !string.IsNullOrWhiteSpace(path) && File.Exists(path) ? path : null;
-
-    private static bool SameFolders(
-        IReadOnlyList<string> cached,
-        IReadOnlyList<string> configured)
-    {
-        if (cached.Count != configured.Count)
-        {
-            return false;
-        }
-
-        var known = new HashSet<string>(cached, GameLibraryPath.Comparer);
-        foreach (var folder in configured)
-        {
-            if (!known.Contains(folder))
-            {
-                return false;
-            }
-        }
-
-        return true;
-    }
-}

src/SharpEmu.GUI/MainWindow.GameOptions.cs

@@ -86,7 +86,6 @@ public partial class MainWindow
             CloseGameSettings();
             LaunchSelected();
         };
-        GameOptionsCloseButton.Click += (_, _) => CloseGameSettings();
         GameOptionsOpenFolderButton.Click += (_, _) => OpenSelectedGameFolder();
         GameOptionsCopyPathButton.Click += async (_, _) =>
             await CopyToClipboardAsync((GameList.SelectedItem as GameEntry)?.Path);
@@ -141,7 +140,6 @@ public partial class MainWindow
             !string.IsNullOrWhiteSpace(game.TitleId);
 
         _isGameSettingsOpen = true;
-        SetGameOptionsPagesSpan(coversConsoleRow: true);
         SetGameOptionsOpenClass(BackdropLayer, active: true);
         SetGameOptionsOpenClass(CarouselHost, active: true);
         SetGameOptionsOpenClass(LibrarySelectedDetails, active: true);
@@ -160,7 +158,6 @@ public partial class MainWindow
         }
 
         _isGameSettingsOpen = false;
-        SetGameOptionsPagesSpan(coversConsoleRow: false);
         SetGameOptionsNavigationIndicator(_gameOptionsIndicatorIndex, animate: false);
         _gameSettingsTitleId = null;
         _gameEnvironmentPassthrough.Clear();
@@ -441,11 +438,6 @@ public partial class MainWindow
             animate);
     }
 
-    private void SetGameOptionsPagesSpan(bool coversConsoleRow)
-    {
-        Grid.SetRowSpan(PagesHost, coversConsoleRow ? 2 : 1);
-    }
-
     private Button[] GameOptionsNavigationButtons() =>
     [
         GameOptionsGeneralNav,

src/SharpEmu.GUI/MainWindow.axaml

@@ -154,7 +154,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
         </StackPanel>
       </Grid>
 
-      <Panel Grid.Row="1" x:Name="PagesHost" ZIndex="1">
+      <Panel Grid.Row="1" x:Name="PagesHost">
 
         <!-- Library page. Covers use a horizontal virtualized rail so the
              number of realized images stays bounded for large libraries. -->
@@ -311,7 +311,6 @@ SPDX-License-Identifier: GPL-2.0-or-later
                                                Duration="0:0:0.18" />
               </Transitions>
             </StackPanel.Transitions>
-            <Border Classes="selectedDetailsDivider" />
             <TextBlock Classes="selectedGameTitle"
                        Text="{Binding Name}"
                        FontWeight="SemiBold"
@@ -450,7 +449,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
               </Border>
 
               <Border Padding="260,18,32,24">
-                <Grid ColumnDefinitions="*,Auto,Auto"
+                <Grid ColumnDefinitions="*,Auto"
                       ColumnSpacing="34">
                   <StackPanel Spacing="3"
                               VerticalAlignment="Center">
@@ -501,20 +500,6 @@ SPDX-License-Identifier: GPL-2.0-or-later
                                  Text="{Binding TitleId}" />
                     </StackPanel>
                   </StackPanel>
-
-                  <Button x:Name="GameOptionsCloseButton"
-                          Grid.Column="2"
-                          Classes="optionsCircle compact"
-                          VerticalAlignment="Center"
-                          ToolTip.Tip="{Binding [Common.Back],
-                                                Source={x:Static local:Localization.Instance},
-                                                x:CompileBindings=False}"
-                          AutomationProperties.Name="{Binding [Common.Back],
-                                                              Source={x:Static local:Localization.Instance},
-                                                              x:CompileBindings=False}">
-                    <TextBlock Classes="materialSymbol"
-                               Text="close" />
-                  </Button>
                 </Grid>
               </Border>
 
@@ -526,18 +511,10 @@ SPDX-License-Identifier: GPL-2.0-or-later
                       RowDefinitions="Auto,*">
                   <Button x:Name="GameOptionsLaunchButton"
                           Classes="gameOptionsLaunch">
-                    <StackPanel Orientation="Horizontal"
-                                Spacing="8"
-                                HorizontalAlignment="Center"
-                                VerticalAlignment="Center">
-                      <TextBlock Classes="materialSymbol"
-                                 VerticalAlignment="Center"
-                                 Text="play_arrow" />
                     <TextBlock VerticalAlignment="Center"
                                Text="{Binding [Library.Context.Launch],
                                               Source={x:Static local:Localization.Instance},
                                               x:CompileBindings=False}" />
-                    </StackPanel>
                   </Button>
 
                   <ScrollViewer x:Name="GameOptionsNavScroll"

src/SharpEmu.GUI/MainWindow.axaml.cs

@@ -36,7 +36,7 @@ public partial class MainWindow : Window
     private const int MaxConsoleLines = 4000;
     private const int MaxConsoleLinesPerFlush = 500;
     private static readonly TimeSpan NavigationIndicatorAnimationDuration =
-        TimeSpan.FromMilliseconds(180);
+        TimeSpan.FromMilliseconds(240);
 
     private static readonly IBrush DefaultLineBrush = new SolidColorBrush(Color.Parse("#C7CFDE"));
     private static readonly IBrush DimLineBrush = new SolidColorBrush(Color.Parse("#6B7488"));
@@ -555,7 +555,7 @@ public partial class MainWindow : Window
         translationAnimation.InsertExpressionKeyFrame(
             1f,
             "this.FinalValue",
-            new CubicEaseOut());
+            new SineEaseInOut());
 
         var animations = visual.Compositor.CreateImplicitAnimationCollection();
         animations[nameof(CompositionVisual.Translation)] = translationAnimation;
@@ -848,8 +848,6 @@ public partial class MainWindow : Window
         {
             _ = CheckForUpdatesAsync();
         }
-
-        SeedLibraryFromCache();
         await RescanLibraryAsync();
     }
 
@@ -1549,31 +1547,6 @@ public partial class MainWindow : Window
         }
     }
 
-    /// <summary>
-    /// Paints the previous scan's result before the real scan starts. The
-    /// scan that follows reconciles over this, so the cache only ever
-    /// shortens the blank period; it never decides what the library holds.
-    /// </summary>
-    private void SeedLibraryFromCache()
-    {
-        Dispatcher.UIThread.VerifyAccess();
-
-        if (_allGames.Count != 0)
-        {
-            return;
-        }
-
-        var cached = GameLibraryCache.Load(_settings.GameFolders.ToArray());
-        if (cached.Count == 0)
-        {
-            return;
-        }
-
-        _allGames.AddRange(cached);
-        RefreshVisibleGames(new HashSet<GameEntry>(cached));
-        LoadGameDetailsInBackground(cached, cached);
-    }
-
     private async Task RescanLibraryAsync(bool showProgress = true)
     {
         Dispatcher.UIThread.VerifyAccess();
@@ -1603,7 +1576,6 @@ public partial class MainWindow : Window
         LoadingState.IsVisible = false;
         LoadGameDetailsInBackground(reconciliation.CoversToLoad, reconciliation.Games);
         UpdateDiscordPresence();
-        GameLibraryCache.Save(folders, reconciliation.Games);
     }
 
     /// <summary>

src/SharpEmu.GUI/Themes/Styles/GameOptions.axaml

@@ -103,12 +103,6 @@ Contextual per-game options reveal, actions, and selected-game motion.
     <Setter Property="Foreground" Value="White" />
   </Style>
 
-  <Style Selector="Button.optionsCircle.compact, ToggleButton.optionsCircle.compact">
-    <Setter Property="Width" Value="40" />
-    <Setter Property="Height" Value="40" />
-    <Setter Property="CornerRadius" Value="20" />
-  </Style>
-
   <Style Selector="StackPanel.selectedDetailsHost">
     <Setter Property="Spacing" Value="18" />
   </Style>
@@ -125,21 +119,6 @@ Contextual per-game options reveal, actions, and selected-game motion.
     <Setter Property="FontSize" Value="26" />
   </Style>
 
-  <Style Selector="Border.selectedDetailsDivider">
-    <Setter Property="Height" Value="1" />
-    <Setter Property="MinWidth" Value="440" />
-    <Setter Property="Margin" Value="0,0,0,18" />
-    <Setter Property="HorizontalAlignment" Value="Stretch" />
-    <Setter Property="Background">
-      <LinearGradientBrush StartPoint="0%,0%" EndPoint="100%,0%">
-        <GradientStop Offset="0" Color="#00FFFFFF" />
-        <GradientStop Offset="0.06" Color="#2EFFFFFF" />
-        <GradientStop Offset="0.55" Color="#14FFFFFF" />
-        <GradientStop Offset="1" Color="#00FFFFFF" />
-      </LinearGradientBrush>
-    </Setter>
-  </Style>
-
   <Style Selector="StackPanel.selectedDetailsHost.gridLayout Button.playButton">
     <Setter Property="MinHeight" Value="44" />
     <Setter Property="MinWidth" Value="168" />