[flutter] handle implicit enum values in codegen, extension for animation state listeners + test

spine-flutter/codegen/src/dart-writer.ts

@@ -212,9 +212,10 @@ export class DartWriter {
 	private transformEnum (cEnum: CEnum): DartEnum {
 		return {
 			name: this.toDartTypeName(cEnum.name),
-			values: cEnum.values.map((value) => ({
+			values: cEnum.values.map((value, index) => ({
 				name: this.toDartEnumValueName(value.name, cEnum.name),
-				value: Number.parseInt(value.value ?? "0")
+				// C enums without explicit values are implicitly numbered 0, 1, 2, etc.
+				value: value.value !== undefined ? Number.parseInt(value.value) : index
 			}))
 		};
 	}

spine-flutter/lib/generated/attachment_type.dart

@@ -32,12 +32,12 @@
 /// AttachmentType enum
 enum AttachmentType {
   region(0),
-  boundingbox(0),
+  boundingbox(1),
-  mesh(0),
+  mesh(2),
-  linkedmesh(0),
+  linkedmesh(3),
-  path(0),
+  path(4),
-  point(0),
+  point(5),
-  clipping(0);
+  clipping(6);
 
   const AttachmentType(this.value);
   final int value;

spine-flutter/lib/generated/blend_mode.dart

@@ -32,9 +32,9 @@
 /// BlendMode enum
 enum BlendMode {
   normal(0),
-  additive(0),
+  additive(1),
-  multiply(0),
+  multiply(2),
-  screen(0);
+  screen(3);
 
   const BlendMode(this.value);
   final int value;

spine-flutter/lib/generated/event_type.dart

@@ -32,11 +32,11 @@
 /// EventType enum
 enum EventType {
   start(0),
-  interrupt(0),
+  interrupt(1),
-  end(0),
+  end(2),
-  dispose(0),
+  dispose(3),
-  complete(0),
+  complete(4),
-  event(0);
+  event(5);
 
   const EventType(this.value);
   final int value;

spine-flutter/lib/generated/format.dart

@@ -32,12 +32,12 @@
 /// Format enum
 enum Format {
   alpha(0),
-  intensity(0),
+  intensity(1),
-  luminanceAlpha(0),
+  luminanceAlpha(2),
-  rgb565(0),
+  rgb565(3),
-  rgba4444(0),
+  rgba4444(4),
-  rgb888(0),
+  rgb888(5),
-  rgba8888(0);
+  rgba8888(6);
 
   const Format(this.value);
   final int value;

spine-flutter/lib/generated/inherit.dart

@@ -32,10 +32,10 @@
 /// Inherit enum
 enum Inherit {
   normal(0),
-  onlyTranslation(0),
+  onlyTranslation(1),
-  noRotationOrReflection(0),
+  noRotationOrReflection(2),
-  noScale(0),
+  noScale(3),
-  noScaleOrReflection(0);
+  noScaleOrReflection(4);
 
   const Inherit(this.value);
   final int value;

spine-flutter/lib/generated/mix_blend.dart

@@ -32,9 +32,9 @@
 /// MixBlend enum
 enum MixBlend {
   setup(0),
-  first(0),
+  first(1),
-  replace(0),
+  replace(2),
-  add(0);
+  add(3);
 
   const MixBlend(this.value);
   final int value;

spine-flutter/lib/generated/mix_direction.dart

@@ -32,7 +32,7 @@
 /// MixDirection enum
 enum MixDirection {
   directionIn(0),
-  directionOut(0);
+  directionOut(1);
 
   const MixDirection(this.value);
   final int value;

spine-flutter/lib/generated/physics.dart

@@ -32,9 +32,9 @@
 /// Physics enum
 enum Physics {
   none(0),
-  reset(0),
+  reset(1),
-  update(0),
+  update(2),
-  pose(0);
+  pose(3);
 
   const Physics(this.value);
   final int value;

spine-flutter/lib/generated/position_mode.dart

@@ -32,7 +32,7 @@
 /// PositionMode enum
 enum PositionMode {
   fixed(0),
-  percent(0);
+  percent(1);
 
   const PositionMode(this.value);
   final int value;

spine-flutter/lib/generated/rotate_mode.dart

@@ -32,8 +32,8 @@
 /// RotateMode enum
 enum RotateMode {
   tangent(0),
-  chain(0),
+  chain(1),
-  chainScale(0);
+  chainScale(2);
 
   const RotateMode(this.value);
   final int value;

spine-flutter/lib/generated/spacing_mode.dart

@@ -32,9 +32,9 @@
 /// SpacingMode enum
 enum SpacingMode {
   length(0),
-  fixed(0),
+  fixed(1),
-  percent(0),
+  percent(2),
-  proportional(0);
+  proportional(3);
 
   const SpacingMode(this.value);
   final int value;

spine-flutter/lib/generated/spine_dart_bindings_generated.dart

@@ -6749,6 +6749,83 @@ class SpineDartBindings {
       _spine_skeleton_drawable_get_animation_state_eventsPtr
           .asFunction<spine_animation_state_events Function(spine_skeleton_drawable)>();
 
+  /// Animation state events functions
+  int spine_animation_state_events_get_num_events(
+    spine_animation_state_events events,
+  ) {
+    return _spine_animation_state_events_get_num_events(
+      events,
+    );
+  }
+
+  late final _spine_animation_state_events_get_num_eventsPtr =
+      _lookup<ffi.NativeFunction<ffi.Int32 Function(spine_animation_state_events)>>(
+          'spine_animation_state_events_get_num_events');
+  late final _spine_animation_state_events_get_num_events =
+      _spine_animation_state_events_get_num_eventsPtr.asFunction<int Function(spine_animation_state_events)>();
+
+  int spine_animation_state_events_get_event_type(
+    spine_animation_state_events events,
+    int index,
+  ) {
+    return _spine_animation_state_events_get_event_type(
+      events,
+      index,
+    );
+  }
+
+  late final _spine_animation_state_events_get_event_typePtr =
+      _lookup<ffi.NativeFunction<ffi.Int32 Function(spine_animation_state_events, ffi.Int32)>>(
+          'spine_animation_state_events_get_event_type');
+  late final _spine_animation_state_events_get_event_type =
+      _spine_animation_state_events_get_event_typePtr.asFunction<int Function(spine_animation_state_events, int)>();
+
+  spine_track_entry spine_animation_state_events_get_track_entry(
+    spine_animation_state_events events,
+    int index,
+  ) {
+    return _spine_animation_state_events_get_track_entry(
+      events,
+      index,
+    );
+  }
+
+  late final _spine_animation_state_events_get_track_entryPtr =
+      _lookup<ffi.NativeFunction<spine_track_entry Function(spine_animation_state_events, ffi.Int32)>>(
+          'spine_animation_state_events_get_track_entry');
+  late final _spine_animation_state_events_get_track_entry = _spine_animation_state_events_get_track_entryPtr
+      .asFunction<spine_track_entry Function(spine_animation_state_events, int)>();
+
+  spine_event spine_animation_state_events_get_event(
+    spine_animation_state_events events,
+    int index,
+  ) {
+    return _spine_animation_state_events_get_event(
+      events,
+      index,
+    );
+  }
+
+  late final _spine_animation_state_events_get_eventPtr =
+      _lookup<ffi.NativeFunction<spine_event Function(spine_animation_state_events, ffi.Int32)>>(
+          'spine_animation_state_events_get_event');
+  late final _spine_animation_state_events_get_event =
+      _spine_animation_state_events_get_eventPtr.asFunction<spine_event Function(spine_animation_state_events, int)>();
+
+  void spine_animation_state_events_reset(
+    spine_animation_state_events events,
+  ) {
+    return _spine_animation_state_events_reset(
+      events,
+    );
+  }
+
+  late final _spine_animation_state_events_resetPtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(spine_animation_state_events)>>(
+          'spine_animation_state_events_reset');
+  late final _spine_animation_state_events_reset =
+      _spine_animation_state_events_resetPtr.asFunction<void Function(spine_animation_state_events)>();
+
   /// Skin functions
   spine_skin_entries spine_skin_get_entries(
     spine_skin skin,

spine-flutter/lib/generated/texture_filter.dart

@@ -32,13 +32,13 @@
 /// TextureFilter enum
 enum TextureFilter {
   unknown(0),
-  nearest(0),
+  nearest(1),
-  linear(0),
+  linear(2),
-  mipMap(0),
+  mipMap(3),
-  mipMapNearestNearest(0),
+  mipMapNearestNearest(4),
-  mipMapLinearNearest(0),
+  mipMapLinearNearest(5),
-  mipMapNearestLinear(0),
+  mipMapNearestLinear(6),
-  mipMapLinearLinear(0);
+  mipMapLinearLinear(7);
 
   const TextureFilter(this.value);
   final int value;

spine-flutter/lib/generated/texture_wrap.dart

@@ -32,8 +32,8 @@
 /// TextureWrap enum
 enum TextureWrap {
   mirroredRepeat(0),
-  clampToEdge(0),
+  clampToEdge(1),
-  repeat(0);
+  repeat(2);
 
   const TextureWrap(this.value);
   final int value;

spine-flutter/lib/spine_dart.dart

@@ -43,6 +43,12 @@ import 'generated/clipping_attachment.dart';
 import 'generated/path_attachment.dart';
 import 'generated/point_attachment.dart';
 import 'generated/rtti.dart';
+import 'generated/skeleton.dart';
+import 'generated/animation_state.dart';
+import 'generated/animation_state_data.dart';
+import 'generated/track_entry.dart';
+import 'generated/event.dart';
+import 'generated/event_type.dart';
 
 // Export generated classes
 export 'generated/api.dart';
@@ -213,3 +219,108 @@ extension SkinExtensions on Skin {
     }
   }
 }
+
+/// Event listener callback for animation state events
+typedef AnimationStateListener = void Function(EventType type, TrackEntry entry, Event? event);
+
+/// Convenient drawable that combines skeleton, animation state, and rendering
+class SkeletonDrawable {
+  final Pointer<spine_skeleton_drawable_wrapper> _drawable;
+  final Map<TrackEntry, AnimationStateListener> _trackEntryListeners = {};
+  AnimationStateListener? _stateListener;
+
+  late final Skeleton skeleton;
+  late final AnimationState animationState;
+  late final AnimationStateData animationStateData;
+
+  SkeletonDrawable(SkeletonData skeletonData)
+      : _drawable = SpineBindings.bindings.spine_skeleton_drawable_create(skeletonData.nativePtr.cast()) {
+    if (_drawable == nullptr) {
+      throw Exception("Failed to create skeleton drawable");
+    }
+
+    // Get references to the skeleton and animation state
+    final skeletonPtr = SpineBindings.bindings.spine_skeleton_drawable_get_skeleton(_drawable.cast());
+    skeleton = Skeleton.fromPointer(skeletonPtr);
+
+    final animationStatePtr = SpineBindings.bindings.spine_skeleton_drawable_get_animation_state(_drawable.cast());
+    animationState = AnimationState.fromPointer(animationStatePtr);
+
+    final animationStateDataPtr =
+        SpineBindings.bindings.spine_skeleton_drawable_get_animation_state_data(_drawable.cast());
+    animationStateData = AnimationStateData.fromPointer(animationStateDataPtr);
+  }
+
+  /// Update the animation state and process events
+  void update(double delta) {
+    // Update animation state
+    animationState.update(delta);
+
+    // Process events
+    final eventsPtr = SpineBindings.bindings.spine_skeleton_drawable_get_animation_state_events(_drawable.cast());
+    if (eventsPtr != nullptr) {
+      final numEvents = SpineBindings.bindings.spine_animation_state_events_get_num_events(eventsPtr.cast());
+
+      for (int i = 0; i < numEvents; i++) {
+        // Get event type
+        final eventTypeValue = SpineBindings.bindings.spine_animation_state_events_get_event_type(eventsPtr.cast(), i);
+        final type = EventType.fromValue(eventTypeValue);
+
+        // Get track entry
+        final trackEntryPtr = SpineBindings.bindings.spine_animation_state_events_get_track_entry(eventsPtr.cast(), i);
+        final trackEntry = TrackEntry.fromPointer(trackEntryPtr);
+
+        // Get event (may be null)
+        final eventPtr = SpineBindings.bindings.spine_animation_state_events_get_event(eventsPtr.cast(), i);
+        final event = eventPtr.address == 0 ? null : Event.fromPointer(eventPtr);
+
+        // Call track entry listener if registered
+        if (_trackEntryListeners.containsKey(trackEntry)) {
+          _trackEntryListeners[trackEntry]?.call(type, trackEntry, event);
+        }
+
+        // Call global state listener
+        _stateListener?.call(type, trackEntry, event);
+
+        // Remove listener if track entry is being disposed
+        if (type == EventType.dispose) {
+          _trackEntryListeners.remove(trackEntry);
+        }
+      }
+
+      // Reset events for next frame
+      SpineBindings.bindings.spine_animation_state_events_reset(eventsPtr.cast());
+    }
+
+    // Apply animation state to skeleton
+    animationState.apply(skeleton);
+  }
+
+  /// Set a listener for all animation state events
+  void setListener(AnimationStateListener? listener) {
+    _stateListener = listener;
+  }
+
+  /// Internal method to set a listener for a specific track entry
+  void _setTrackEntryListener(TrackEntry entry, AnimationStateListener? listener) {
+    if (listener == null) {
+      _trackEntryListeners.remove(entry);
+    } else {
+      _trackEntryListeners[entry] = listener;
+    }
+  }
+
+  void dispose() {
+    _trackEntryListeners.clear();
+    _stateListener = null;
+    SpineBindings.bindings.spine_skeleton_drawable_dispose(_drawable.cast());
+  }
+}
+
+/// Extension to add setListener to TrackEntry
+extension TrackEntryExtensions on TrackEntry {
+  /// Set a listener for events from this track entry
+  void setListener(SkeletonDrawable drawable, AnimationStateListener? listener) {
+    drawable._setTrackEntryListener(this, listener);
+  }
+}

spine-flutter/test/skeleton_drawable_test.dart

@@ -0,0 +1,74 @@
+import 'dart:io';
+import 'package:spine_flutter/spine_dart.dart';
+
+void main() async {
+  print('Testing SkeletonDrawable and event listeners...');
+
+  // Initialize with debug extension enabled
+  await initSpineDart(enableMemoryDebugging: true);
+
+  // Load atlas and skeleton data
+  final atlasData = File('../example/assets/spineboy.atlas').readAsStringSync();
+  final atlas = loadAtlas(atlasData);
+  final skeletonJson = File('../example/assets/spineboy-pro.json').readAsStringSync();
+  final skeletonData = loadSkeletonDataJson(atlas, skeletonJson);
+
+  // Create skeleton drawable
+  final drawable = SkeletonDrawable(skeletonData);
+  print('SkeletonDrawable created successfully');
+
+  // Track events
+  final events = <String>[];
+
+  // Set global animation state listener
+  drawable.setListener((type, entry, event) {
+    final eventName = event?.data.name ?? 'null';
+    events.add('State: $type, event: $eventName');
+  });
+
+  // Set an animation
+  final trackEntry = drawable.animationState.setAnimation(0, 'walk', true);
+  print('Set animation: walk');
+
+  // Set track entry specific listener
+  trackEntry.setListener(drawable, (type, entry, event) {
+    final eventName = event?.data.name ?? 'null';
+    events.add('TrackEntry: $type, event: $eventName');
+  });
+
+  // Update several times to trigger events
+  print('\nUpdating animation state...');
+  for (int i = 0; i < 5; i++) {
+    drawable.update(0.016); // ~60fps
+  }
+
+  // Print collected events
+  print('\nCollected events:');
+  for (final event in events) {
+    print('  $event');
+  }
+
+  // Test switching animations
+  print('\nSwitching to run animation...');
+  events.clear();
+  drawable.animationState.setAnimation(0, 'run', true);
+
+  // Update a few more times
+  for (int i = 0; i < 3; i++) {
+    drawable.update(0.016);
+  }
+
+  print('\nEvents after switching:');
+  for (final event in events) {
+    print('  $event');
+  }
+
+  // Cleanup
+  drawable.dispose();
+  skeletonData.dispose();
+  atlas.dispose();
+
+  // Report memory leaks
+  reportLeaks();
+  print('\nTest complete');
+}