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

src/SharpEmu.GUI/MainWindow.axaml.cs

@@ -123,6 +123,7 @@ public partial class MainWindow : Window
     private bool _isClosing;
     private bool _restoringGameSelection;
     private bool _addFolderInProgress;
+    private bool _isLibraryGridLayout;
     private GameEntry? _lastSelectedGame;
 
     // Bundled key art shown whenever no game-specific backdrop applies; the
@@ -134,6 +135,8 @@ public partial class MainWindow : Window
     private HostGamepadButtons _previousPadButtons;
     private long _navLeftNextAt;
     private long _navRightNextAt;
+    private long _navUpNextAt;
+    private long _navDownNextAt;
 
     //Github http client for latest commit
     private static readonly HttpClient GithubHttpClient = CreateGithubHttpClient();
@@ -219,6 +222,9 @@ public partial class MainWindow : Window
         CloseConsoleButton.Click += (_, _) => ConsoleToggle.IsChecked = false;
         LibraryTabButton.Click += (_, _) => SetActivePage(0);
         OptionsTabButton.Click += (_, _) => SetActivePage(1);
+        LibraryLayoutButton.Click += (_, _) => ToggleLibraryLayout();
+        LibraryPage.SizeChanged += (_, _) => UpdateLibraryGridHeight();
+        LibrarySelectedDetails.SizeChanged += (_, _) => UpdateLibraryGridHeight();
         ConsoleToggle.IsCheckedChanged += (_, _) => ConsolePanel.IsVisible = ConsoleToggle.IsChecked == true && _consoleWindow is null;
         WireOptionsNavigation();
         WireGameOptions();
@@ -379,18 +385,73 @@ public partial class MainWindow : Window
         }
     }
 
-    private static void SetActiveClass(Button button, bool active)
+    private void SetLibraryLayout(bool grid)
+    {
+        _isLibraryGridLayout = grid;
+        SetClass(GameList, "gridLayout", grid);
+        SetClass(LibrarySelectedDetails, "gridLayout", grid);
+        LibraryPage.RowDefinitions[0].Height = grid
+            ? GridLength.Auto
+            : new GridLength(188);
+        LibraryPage.Margin = grid
+            ? new Thickness(0, 6, 0, 0)
+            : new Thickness(0, 46, 0, 0);
+        UpdateLibraryGridHeight();
+        UpdateLibraryLayoutButton();
+
+        if (GameList.SelectedItem is { } selected)
+        {
+            Dispatcher.UIThread.Post(
+                () => GameList.ScrollIntoView(selected),
+                DispatcherPriority.Loaded);
+        }
+    }
+
+    private void UpdateLibraryGridHeight()
+    {
+        var pageHeight = LibraryPage.Bounds.Height;
+        if (!_isLibraryGridLayout || pageHeight <= 0)
+        {
+            GameList.MaxHeight = double.PositiveInfinity;
+            return;
+        }
+
+        GameList.MaxHeight = Math.Max(
+            0,
+            pageHeight - LibrarySelectedDetails.DesiredSize.Height);
+    }
+
+    private void ToggleLibraryLayout()
+    {
+        SetLibraryLayout(!_isLibraryGridLayout);
+        _settings.LibraryLayout = _isLibraryGridLayout ? "Grid" : "Carousel";
+        _settings.Save();
+    }
+
+    private void UpdateLibraryLayoutButton()
+    {
+        LibraryLayoutGlyph.Text = _isLibraryGridLayout ? "view_carousel" : "grid_view";
+        var label = Localization.Instance.Get(
+            _isLibraryGridLayout ? "Library.View.Carousel" : "Library.View.Grid");
+        ToolTip.SetTip(LibraryLayoutButton, label);
+        AutomationProperties.SetName(LibraryLayoutButton, label);
+    }
+
+    private static void SetActiveClass(Button button, bool active) =>
+        SetClass(button, "active", active);
+
+    private static void SetClass(Control control, string className, bool active)
     {
         if (active)
         {
-            if (!button.Classes.Contains("active"))
+            if (!control.Classes.Contains(className))
             {
-                button.Classes.Add("active");
+                control.Classes.Add(className);
             }
         }
         else
         {
-            button.Classes.Remove("active");
+            control.Classes.Remove(className);
         }
     }
 
@@ -676,6 +737,23 @@ public partial class MainWindow : Window
             MoveSelection(1);
         }
 
+        if (_isLibraryGridLayout)
+        {
+            var up = (pad.Buttons & HostGamepadButtons.Up) != 0 || pad.LeftY < 64;
+            var down = (pad.Buttons & HostGamepadButtons.Down) != 0 || pad.LeftY > 192;
+            var rowStep = LibraryRowStep();
+
+            if (ShouldNavigate(up, ref _navUpNextAt, now))
+            {
+                MoveSelection(-rowStep);
+            }
+
+            if (ShouldNavigate(down, ref _navDownNextAt, now))
+            {
+                MoveSelection(rowStep);
+            }
+        }
+
         var pressed = pad.Buttons & ~_previousPadButtons;
         if ((pressed & HostGamepadButtons.Cross) != 0)
         {
@@ -712,6 +790,29 @@ public partial class MainWindow : Window
         return false;
     }
 
+    private int LibraryRowStep()
+    {
+        if (GameList.ContainerFromIndex(0) is not { } first)
+        {
+            return 1;
+        }
+
+        var top = first.Bounds.Top;
+        var columns = 1;
+        for (var index = 1; index < _libraryTiles.Count; index++)
+        {
+            if (GameList.ContainerFromIndex(index) is not { } container ||
+                Math.Abs(container.Bounds.Top - top) > 0.5)
+            {
+                break;
+            }
+
+            columns++;
+        }
+
+        return columns;
+    }
+
     private void MoveSelection(int delta)
     {
         var index = GameList.SelectedIndex < 0
@@ -783,6 +884,7 @@ public partial class MainWindow : Window
         RefreshHostRefreshRates(_settings.RefreshRate);
         RefreshUpdateText();
         UpdateEmptyStateTexts();
+        UpdateLibraryLayoutButton();
         UpdateRunButtons();
     }
 
@@ -1067,6 +1169,7 @@ public partial class MainWindow : Window
         LogToFileToggle.IsChecked = _settings.LogToFile;
         OverrideLogFileToggle.IsChecked = _settings.OverrideLogFile;
         TitleMusicToggle.IsChecked = _settings.PlayTitleMusic;
+        SetLibraryLayout(string.Equals(_settings.LibraryLayout, "Grid", StringComparison.OrdinalIgnoreCase));
         DiscordToggle.IsChecked = _settings.DiscordRichPresence;
         AutoUpdateToggle.IsChecked = _settings.CheckForUpdatesOnStartup;
         EnvBthidToggle.IsChecked = _settings.EnvironmentToggles.Contains("SHARPEMU_BTHID_UNAVAILABLE");