flutter_canvas_template_editor/lib/battery/animated_bat...

// Copyright (c) 2021 Razeware LLC
//
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// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
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// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
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// all copies or substantial portions of the Software.
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import 'battery_painter.dart';
import 'package:flutter/material.dart';

class AnimatedBattery extends StatefulWidget {

  const AnimatedBattery({Key? key}) : super(key: key);

  @override
  _AnimatedBatteryState createState() => _AnimatedBatteryState();
}

class _AnimatedBatteryState extends State<AnimatedBattery>
    with SingleTickerProviderStateMixin {
  final duration = const Duration(seconds: 5);
  late AnimationController _ctrl;

  @override
  void initState() {
    _ctrl = AnimationController(duration: duration, vsync: this)
      ..addListener(() => setState(() {}))
      ..forward()
      ..addStatusListener((status) {
        if (status == AnimationStatus.completed) {
          _ctrl.reverse();
        } else if (status == AnimationStatus.dismissed) {
          _ctrl.forward();
        }
      });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return CustomPaint(
      painter: BatteryPainter(charge: _ctrl.value),
    );
  }

  @override
  void dispose() {
    _ctrl.dispose();
    super.dispose();
  }
}