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73 lines
2.7 KiB
Dart
73 lines
2.7 KiB
Dart
import 'package:flutter/animation.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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/// Custom switch widget
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/// [value] switch is active or not
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/// [onChanged] function to be executed after sometime
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/// [activeColor] color of active status
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/// [inactiveColor] color of inactive status
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class CustomSwitch extends StatefulWidget {
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final bool value;
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final AsyncCallback onChanged;
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final Color activeColor;
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final Color inactiveColor;
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CustomSwitch({Key key, this.value, this.onChanged, this.activeColor, this.inactiveColor}) : super(key: key);
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@override
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_CustomSwitchState createState() => _CustomSwitchState();
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}
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class _CustomSwitchState extends State<CustomSwitch> with SingleTickerProviderStateMixin {
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Animation _circleAnimation;
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AnimationController _animationController;
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@override
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void initState() {
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super.initState();
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_animationController = AnimationController(vsync: this, duration: Duration(milliseconds: 500));
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_circleAnimation = Tween(begin: 0.0, end: 22.0).animate(CurvedAnimation(parent: _animationController, curve: Curves.easeOutQuint, reverseCurve: Curves.easeInQuint));
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if (widget.value) _animationController.forward();
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}
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@override
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Widget build(BuildContext context) {
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return AnimatedBuilder(
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animation: _animationController,
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builder: (context, child) {
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bool _switchStatus = _circleAnimation.status == AnimationStatus.dismissed || _circleAnimation.status == AnimationStatus.reverse;
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return GestureDetector(
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onTap: Feedback.wrapForTap(() async {
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if (widget.value) {
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_animationController.reverse();
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} else {
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_animationController.forward();
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}
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await widget.onChanged();
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}, context),
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child: AnimatedContainer(
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duration: Duration(milliseconds: 200),
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width: 50.0,
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height: 25.0,
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decoration: BoxDecoration(borderRadius: BorderRadius.circular(20.0), color: _switchStatus ? widget.inactiveColor : widget.activeColor),
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child: Padding(
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padding: EdgeInsets.only(top: 4.0, bottom: 4.0, right: 6.0, left: 6.0),
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child: Row(
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children: <Widget>[
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Container(width: _circleAnimation.value),
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Container(
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width: 16.0,
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height: 16.0,
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decoration: BoxDecoration(boxShadow: [BoxShadow(color: Colors.grey[800].withOpacity(0.15), offset: Offset(0, 4.0), blurRadius: 5.0)], shape: BoxShape.circle, color: Colors.white),
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)
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],
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),
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),
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),
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);
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},
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);
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}
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}
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