animo 1.0.1

Dart/Flutter utility package for performing staggered animation.

tween_manager

Dart/Flutter utility package for performing staggered animation. The idea is to have a simple interface that allows you to create multiple controllers and tweens attached to them.

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The package delivers a single utility TweenManager that accepts a function. That one gets called with a factory function that you can use to create simple objects of type TMAnimation. Those objects have defineTween (returns Animation) and controller which is an instance of AnimationController. Checkout the example below to get a better idea.

Example

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

class TestWidget extends StatelessWidget {
  Widget build(context) {
    return TweenManager((defineAnimation) {
      // When you have complex animation sequences you'll probably need
      // multiple controllers. `defineAnimation` spins up a new one every time
      // when it gets called.
      TMAnimation anim = defineAnimation(duration: Duration(seconds: 1));
      
      // You can create multiple animations attached to a single controller.
      Animation a = anim.defineTween(
          begin: 0, end: 120, interval: Interval(0, 1, curve: Curves.easeOut));

      // ... and at the end control your animation directly by calling forward, reverse, stop
      // methods of the AnimationController instance
      anim.controller.forward();

      // It is important to return a function that returns your widgets. This function gets
      // gets called on every tick of the animation.
      return () {
        return Text('value: ${a.value}');
      };
    });
  }
}