veilidchat/lib/tools/animations.dart

import 'package:flutter/material.dart';
import 'package:flutter_animate/flutter_animate.dart';

enum AnimationTrigger {
  onPageLoad,
  onActionTrigger,
}

class AnimationInfo {
  AnimationInfo({
    required this.trigger,
    required this.effects,
    this.loop = false,
    this.reverse = false,
    this.applyInitialState = true,
  });
  final AnimationTrigger trigger;
  final List<Effect<dynamic>> effects;
  final bool applyInitialState;
  final bool loop;
  final bool reverse;
  late Adapter adapter;
  late AnimationController controller;
}

void createAnimation(AnimationInfo animation, TickerProvider vsync) {
  final newController = AnimationController(vsync: vsync);
  animation
    ..controller = newController
    ..adapter = (ValueAdapter(0)..attach(newController));
}

void setupAnimations(Iterable<AnimationInfo> animations, TickerProvider vsync) {
  for (final animation in animations) {
    createAnimation(animation, vsync);
  }
}

extension AnimatedWidgetExtension on Widget {
  Widget animateOnPageLoad(AnimationInfo animationInfo) => Animate(
      controller:
          animationInfo.applyInitialState ? null : animationInfo.controller,
      adapter: animationInfo.applyInitialState ? null : animationInfo.adapter,
      effects: animationInfo.effects,
      child: this,
      onPlay: (controller) => animationInfo.loop
          ? controller.repeat(reverse: animationInfo.reverse)
          : null,
      onComplete: (controller) => !animationInfo.loop && animationInfo.reverse
          ? controller.reverse()
          : null);

  Widget animateOnActionTrigger(
    AnimationInfo animationInfo, {
    bool hasBeenTriggered = false,
  }) =>
      hasBeenTriggered || animationInfo.applyInitialState
          ? Animate(
              controller: animationInfo.controller,
              adapter: animationInfo.adapter,
              effects: animationInfo.effects,
              child: this)
          : this;
}

class TiltEffect extends Effect<Offset> {
  const TiltEffect({
    super.delay,
    super.duration,
    super.curve,
    Offset? begin,
    Offset? end,
  }) : super(
          begin: begin ?? Offset.zero,
          end: end ?? Offset.zero,
        );

  @override
  Widget build(
    BuildContext context,
    Widget child,
    AnimationController controller,
    EffectEntry entry,
  ) {
    final animation = buildAnimation(controller, entry);
    return getOptimizedBuilder<Offset>(
      animation: animation,
      builder: (_, __) => Transform(
        transform: Matrix4.identity()
          ..setEntry(3, 2, 0.001)
          ..rotateX(animation.value.dx)
          ..rotateY(animation.value.dy),
        alignment: Alignment.center,
        child: child,
      ),
    );
  }
}