88 lines
2.0 KiB
Dart
88 lines
2.0 KiB
Dart
// ignore_for_file: library_private_types_in_public_api
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import 'package:flutter/material.dart';
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class ExpandedSection extends StatefulWidget {
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final Widget? child;
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final bool expand;
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final double begin;
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final double end;
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const ExpandedSection({
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super.key,
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this.expand = false,
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this.child,
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this.begin = 0.0,
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this.end = 1.0,
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});
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@override
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_ExpandedSectionState createState() => _ExpandedSectionState();
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}
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class _ExpandedSectionState extends State<ExpandedSection>
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with SingleTickerProviderStateMixin {
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late AnimationController expandController;
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late Animation<double> animation;
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@override
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void initState() {
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super.initState();
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prepareAnimations();
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_runExpandCheck();
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}
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///Setting up the animation
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// void prepareAnimations() {
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// expandController = AnimationController(
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// vsync: this, duration: const Duration(milliseconds: 500));
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// animation = CurvedAnimation(
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// parent: expandController,
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// curve: Curves.fastOutSlowIn,
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// );
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// }
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void prepareAnimations() {
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expandController = AnimationController(
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vsync: this, duration: const Duration(milliseconds: 400));
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Animation<double> curve = CurvedAnimation(
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parent: expandController,
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curve: Curves.fastOutSlowIn,
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);
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animation = Tween(begin: widget.begin, end: widget.end).animate(curve);
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// animation = CurvedAnimation(
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// parent: expandController,
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// curve: Curves.fastOutSlowIn,
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// );
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}
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void _runExpandCheck() {
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if (widget.expand) {
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expandController.forward();
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} else {
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expandController.reverse();
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}
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}
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@override
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void didUpdateWidget(ExpandedSection oldWidget) {
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super.didUpdateWidget(oldWidget);
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_runExpandCheck();
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}
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@override
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void dispose() {
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expandController.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return SizeTransition(
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axisAlignment: -1.0,
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sizeFactor: animation,
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child: widget.child,
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);
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}
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}
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