WIP moving difficulty selection to engine

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>
2026-03-18 12:25:59 +01:00
parent 0f7c77e85a
commit e39dfd5da0
29 changed files with 1337 additions and 3360 deletions
@@ -0,0 +1,94 @@
+import 'package:wolf_3d_dart/wolf_3d_data_types.dart';
+import 'package:wolf_3d_dart/wolf_3d_engine.dart';
+
+/// Handles menu-only input state such as selection movement and edge triggers.
+class MenuManager {
+  int _selectedDifficultyIndex = 0;
+
+  bool _prevUp = false;
+  bool _prevDown = false;
+  bool _prevConfirm = false;
+  bool _prevBack = false;
+
+  /// Current selected difficulty row index.
+  int get selectedDifficultyIndex => _selectedDifficultyIndex;
+
+  /// Resets menu navigation state for a new difficulty selection flow.
+  void beginDifficultySelection({Difficulty? initialDifficulty}) {
+    _selectedDifficultyIndex = initialDifficulty == null
+        ? 0
+        : Difficulty.values
+              .indexOf(initialDifficulty)
+              .clamp(
+                0,
+                Difficulty.values.length - 1,
+              );
+
+    _prevUp = false;
+    _prevDown = false;
+    _prevConfirm = false;
+    _prevBack = false;
+  }
+
+  /// Returns a menu action snapshot for this frame.
+  ({Difficulty? selected, bool goBack}) updateDifficultySelection(
+    EngineInput input,
+  ) {
+    final upNow = input.isMovingForward;
+    final downNow = input.isMovingBackward;
+    final confirmNow = input.isInteracting || input.isFiring;
+    final backNow = input.isBack;
+
+    if (upNow && !_prevUp) {
+      _selectedDifficultyIndex =
+          (_selectedDifficultyIndex - 1 + Difficulty.values.length) %
+          Difficulty.values.length;
+    }
+
+    if (downNow && !_prevDown) {
+      _selectedDifficultyIndex =
+          (_selectedDifficultyIndex + 1) % Difficulty.values.length;
+    }
+
+    // Pointer/touch selection for hosts that provide menu tap coordinates.
+    if (input.menuTapX != null && input.menuTapY != null) {
+      final x320 = (input.menuTapX!.clamp(0.0, 1.0) * 320).toDouble();
+      final y200 = (input.menuTapY!.clamp(0.0, 1.0) * 200).toDouble();
+
+      const panelX = 28.0;
+      const panelY = 70.0;
+      const panelW = 264.0;
+      const panelH = 82.0;
+      const rowYStart = 86.0;
+      const rowStep = 15.0;
+
+      if (x320 >= panelX &&
+          x320 <= panelX + panelW &&
+          y200 >= panelY &&
+          y200 <= panelY + panelH) {
+        final index = ((y200 - rowYStart + (rowStep / 2)) / rowStep).floor();
+        if (index >= 0 && index < Difficulty.values.length) {
+          _selectedDifficultyIndex = index;
+          return (selected: Difficulty.values[index], goBack: false);
+        }
+      }
+    }
+
+    Difficulty? selected;
+    if (confirmNow && !_prevConfirm) {
+      selected = Difficulty.values[_selectedDifficultyIndex];
+    }
+
+    final bool goBack = backNow && !_prevBack;
+
+    _prevUp = upNow;
+    _prevDown = downNow;
+    _prevConfirm = confirmNow;
+    _prevBack = backNow;
+
+    return (selected: selected, goBack: goBack);
+  }
+
+  /// Whether to show the alternate cursor frame at [elapsedMs].
+  bool isCursorAltFrame(int elapsedMs) => ((elapsedMs ~/ 220) % 2) == 1;
+}