126 lines
3.5 KiB
Dart
126 lines
3.5 KiB
Dart
import 'dart:math' as math;
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import 'package:flutter/material.dart';
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import '../util/extension_helper.dart';
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class SettingsSheet extends StatefulWidget {
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SettingsSheet({this.height, Key? key}) : super(key: key);
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final double? height;
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@override
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_SettingsSheetState createState() => _SettingsSheetState();
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}
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class _SettingsSheetState extends State<SettingsSheet>
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with TickerProviderStateMixin {
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late Animation _animation;
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late AnimationController _controller;
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late AnimationController _slowController;
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double? _initSize;
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late double _startdy;
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double _move = 0;
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@override
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void initState() {
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_initSize = widget.height;
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_controller =
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AnimationController(vsync: this, duration: Duration(milliseconds: 50))
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..addListener(() {
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if (mounted) setState(() {});
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});
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_slowController =
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AnimationController(vsync: this, duration: Duration(milliseconds: 200))
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..addListener(() {
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if (mounted) setState(() {});
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});
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_animation =
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Tween<double>(begin: 0, end: _initSize).animate(_slowController);
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_slowController.forward();
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super.initState();
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}
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@override
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void dispose() {
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_slowController.dispose();
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_controller.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 Scaffold(
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backgroundColor: Colors.transparent,
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body: Container(
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height: context.height,
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child: Stack(alignment: Alignment.bottomCenter, children: [
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Positioned.fill(
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child: GestureDetector(
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onTap: () {
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_backToMini();
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Navigator.pop(context);
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},
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child: Container(
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color: context.background.withOpacity(
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0.8 * math.min(_animation.value / widget.height, 1.0)),
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),
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),
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),
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GestureDetector(
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onVerticalDragStart: _start,
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onVerticalDragUpdate: _update,
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onVerticalDragEnd: (event) => _end(),
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child: Container(
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height: math.min(_animation.value, widget.height!),
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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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_backToMini() {
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setState(() {
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_animation =
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Tween<double>(begin: _initSize, end: 0).animate(_slowController);
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_initSize = 0;
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});
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_slowController.forward();
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}
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_start(DragStartDetails event) {
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setState(() {
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_startdy = event.localPosition.dy;
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_animation =
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Tween<double>(begin: _initSize, end: _initSize).animate(_controller);
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});
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_controller.forward();
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}
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_update(DragUpdateDetails event) {
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setState(() {
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_move = _startdy - event.localPosition.dy;
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_animation = Tween<double>(begin: _initSize, end: _initSize! + _move)
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.animate(_controller);
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});
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_controller.forward();
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}
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_end() async {
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if (_move < -50) {
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setState(() {
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_animation =
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Tween<double>(begin: _animation.value, end: 0).animate(_controller);
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_initSize = 0;
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});
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_controller.forward();
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Navigator.pop(context);
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} else {
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setState(() {
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_animation = Tween<double>(begin: _animation.value, end: widget.height)
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.animate(_controller);
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_initSize = widget.height;
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});
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_controller.forward();
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}
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}
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}
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