spine-runtimes/spine-flutter/example/lib/animation_state_events.dart

import 'package:flutter/material.dart';
import 'package:esotericsoftware_spine_flutter/spine_flutter.dart';

class AnimationStateEvents extends StatelessWidget {
  const AnimationStateEvents({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    reportLeaks();
    final controller = SpineWidgetController(onInitialized: (controller) {
      for (final bone in controller.skeleton.getBones()) {
        print(bone);
      }
      controller.skeleton.setScaleX(0.5);
      controller.skeleton.setScaleY(0.5);
      controller.skeleton.findSlot("gun")?.setColor(Color(1, 0, 0, 1));
      controller.animationStateData.setDefaultMix(0.2);
      controller.animationState.setAnimationByName(0, "walk", true).setListener((type, trackEntry, event) {
        print("Walk animation event $type");
      });
      controller.animationState.addAnimationByName(0, "jump", false, 2);
      controller.animationState.addAnimationByName(0, "run", true, 0).setListener((type, trackEntry, event) {
        print("Run animation event $type");
      });
      controller.animationState.setListener((type, trackEntry, event) {
        if (type == EventType.Event) {
          print("User event: { name: ${event?.getData().getName()}, intValue: ${event?.getIntValue()}, floatValue: intValue: ${event?.getFloatValue()}, stringValue: ${event?.getStringValue()} }");
        }
      });
      print("Current: ${controller.animationState.getCurrent(0)?.getAnimation().getName()}");
    });

    return Scaffold(
      appBar: AppBar(title: const Text('Spineboy')),
      body: Column(
        children: [
          const Text("See output in console!"),
          Expanded(
              child: SpineWidget.asset("assets/spineboy-pro.skel", "assets/spineboy.atlas", controller)
          )
        ]
      )
    );
  }
}