Tweener

Tweener is a simple and lightweight flutter animation tool. Anyone can easily learn to use it.

Features

• Does one thing and one thing only: tween properties
• Very simple to use, but it can achieve a lot of effects
• Easing functions are reusable outside of Tween

Installation

Install the Tweener https://pub.dev/packages/tweener:

You should ensure that you add the following dependency in your Flutter project.

dependencies:
  tweener: ^2.2.2

install packages from the command line:

flutter packages get

Useage

import class

import 'package:tweener/tweener.dart';

use Tweener

Tweener({"x": 0, "y": 0, "alpha": 0, "custom_prop_abc": 123})
    .to({"x": 100, "y": 500, "alpha": 1, "custom_prop_abc": 321}, 2000)
    .easing(Tweener.ease.elastic.easeOut)
    .onUpdate((obj) {
        setState(() {
            _x = obj["x"];
            _y = obj["y"];
            _alpha = obj["alpha"];
            _abc = obj["custom_prop_abc"];
        });
    })
    .onComplete((obj){
        /// 
    })
    .start();

var tween1 = new Tweener(sprite)
	.to({x: 700, y: 200, rotation: 359}, 2000)
	.delay(1000)
	.easing(Ease.back.easeOut)
	.onUpdate(update);

var tween2 = new Tweener(sprite)
	.to({x: 10, y: 20, rotation: 30}, 2000)
	.onUpdate(update);

tween1.chain(tween2);
tween1.start();

About AnimateCon

To operate widget animations more conveniently, you can utilize the AnimateCon library. This library provides extremely facile implementation methods for animations such as position, scale, and alpha, enabling you to easily create various vivid and interesting animation effects.

Thanks

Tweener refers to the implementation code of tween.js. They are really great. I want to pay tribute to the original author!