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fix folding cube animation #99

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merged 1 commit into from
Aug 28, 2021
Merged

fix folding cube animation #99

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94 changes: 77 additions & 17 deletions lib/src/folding_cube.dart
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import 'dart:async';
import 'package:flutter/widgets.dart';

class SpinKitFoldingCube extends StatefulWidget {
Expand All @@ -22,33 +23,87 @@ class SpinKitFoldingCube extends StatefulWidget {
_SpinKitFoldingCubeState createState() => _SpinKitFoldingCubeState();
}

class _SpinKitFoldingCubeState extends State<SpinKitFoldingCube> with SingleTickerProviderStateMixin {
late AnimationController _controller;
class _SpinKitFoldingCubeState extends State<SpinKitFoldingCube> with TickerProviderStateMixin {
late final int delay;

late AnimationController _controller1;
late AnimationController _controller2;
late AnimationController _controller3;
late AnimationController _controller4;
late Animation<double> _rotate1;
late Animation<double> _rotate2;
late Animation<double> _rotate3;
late Animation<double> _rotate4;

late Timer _timer2;
late Timer _timer3;
late Timer _timer4;

@override
void initState() {
super.initState();

_controller = (widget.controller ?? AnimationController(vsync: this, duration: widget.duration))
..addListener(() => setState(() {}))
..repeat(reverse: true);
_rotate1 = Tween(begin: 0.0, end: 180.0)
.animate(CurvedAnimation(parent: _controller, curve: const Interval(0.0, 0.25, curve: Curves.easeIn)));
_rotate2 = Tween(begin: 0.0, end: 180.0)
.animate(CurvedAnimation(parent: _controller, curve: const Interval(0.25, 0.5, curve: Curves.easeIn)));
_rotate3 = Tween(begin: 0.0, end: 180.0)
.animate(CurvedAnimation(parent: _controller, curve: const Interval(0.5, 0.75, curve: Curves.easeIn)));
_rotate4 = Tween(begin: 0.0, end: 180.0)
.animate(CurvedAnimation(parent: _controller, curve: const Interval(0.75, 1.0, curve: Curves.easeIn)));
delay = widget.duration.inMilliseconds ~/ 8;

_controller1 = (widget.controller ?? AnimationController(vsync: this, duration: widget.duration))
..addListener(() => setState(() {}));
_controller2 = widget.controller ?? AnimationController(vsync: this, duration: widget.duration);
_controller3 = widget.controller ?? AnimationController(vsync: this, duration: widget.duration);
_controller4 = widget.controller ?? AnimationController(vsync: this, duration: widget.duration);

final tweenSequence = TweenSequence<double>([
TweenSequenceItem(tween: ConstantTween<double>(-180.0).chain(CurveTween(curve: Curves.easeIn)), weight: 10.0),
TweenSequenceItem(tween: Tween<double>(begin: -180.0, end: 0.0), weight: 15.0),
TweenSequenceItem(tween: ConstantTween<double>(0.0), weight: 50.0),
TweenSequenceItem(
tween: Tween<double>(begin: 0.0, end: 180.0).chain(CurveTween(curve: Curves.easeIn)), weight: 15.0),
TweenSequenceItem(tween: ConstantTween(180.0), weight: 10),
]);

_rotate1 = tweenSequence.animate(_controller1)
..addStatusListener((status) {
if (status == AnimationStatus.completed) {
startAnimation();
}
});
_rotate2 = tweenSequence.animate(_controller2);
_rotate3 = tweenSequence.animate(_controller3);
_rotate4 = tweenSequence.animate(_controller4);

startAnimation();
}

void startAnimation() {
if (mounted) {
_controller1.forward(from: 0.0);
}
_timer2 = Timer(Duration(milliseconds: delay), () {
if (mounted) {
_controller2.forward(from: 0.0);
}
});
_timer3 = Timer(Duration(milliseconds: delay * 2), () {
if (mounted) {
_controller3.forward(from: 0.0);
}
});
_timer4 = Timer(Duration(milliseconds: delay * 3), () {
if (mounted) {
_controller4.forward(from: 0.0);
}
});
}

@override
void dispose() {
_controller.dispose();
_timer2.cancel();
_timer3.cancel();
_timer4.cancel();
_controller1.dispose();
_controller2.dispose();
_controller3.dispose();
_controller4.dispose();

super.dispose();
}

Expand Down Expand Up @@ -77,7 +132,12 @@ class _SpinKitFoldingCubeState extends State<SpinKitFoldingCube> with SingleTick
Widget _cube(int i, {required Animation<double> animation}) {
final _size = widget.size * 0.5, _position = widget.size * .5;

final Matrix4 _tRotate = Matrix4.identity()..rotateY(animation.value * 0.0174533);
final Matrix4 _tRotate = Matrix4.identity();
if (animation.value <= 0) {
_tRotate.rotateX(animation.value * 0.0174533);
} else {
_tRotate.rotateY(animation.value * 0.0174533);
}

return Positioned.fill(
top: _position,
Expand All @@ -88,9 +148,9 @@ class _SpinKitFoldingCubeState extends State<SpinKitFoldingCube> with SingleTick
alignment: Alignment.center,
child: Transform(
transform: _tRotate,
alignment: Alignment.centerLeft,
alignment: animation.value <= 0 ? Alignment.topCenter : Alignment.centerLeft,
child: Opacity(
opacity: 1.0 - (animation.value / 180.0),
opacity: 1.0 - (animation.value.abs() / 180.0),
child: SizedBox.fromSize(
size: Size.square(_size),
child: _itemBuilder(i - 1),
Expand Down