forked from lxm_flutter/FlutterUnit
118 lines
3.2 KiB
Dart
118 lines
3.2 KiB
Dart
import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020/9/21
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/// contact me by email 1981462002@qq.com
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/// 说明: 221 DraggableScrollableActuator 拖滑重置器 它可以通知后代的 DraggableScrollableSheet，将其位置重置为初始状态。
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// {
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// "widgetId": 221,
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// "name": '基本使用方法',
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// "priority": 1,
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// "subtitle": "【child】 : 子组件 【Widget】\n"
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// "使用 DraggableScrollableActuator.reset(context) 重置后代 DraggableScrollableSheet 位初始位置。",
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// }
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class DraggableScrollableActuatorDemo extends StatelessWidget {
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const DraggableScrollableActuatorDemo({Key? key}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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return Container(
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padding: const EdgeInsets.all(10),
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child: ElevatedButton(
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onPressed: () {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => DraggableScrollableActuatorPage()),
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);
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},
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child: const Text("进入 DraggableScrollableActuator 测试页"),
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),
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);
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}
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}
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class DraggableScrollableActuatorPage extends StatelessWidget {
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DraggableScrollableActuatorPage({Key? key}) : super(key: key);
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final List<Color> data = [
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Colors.orange[50]!,
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Colors.orange[100]!,
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Colors.orange[200]!,
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Colors.orange[300]!,
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Colors.orange[400]!,
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Colors.orange[500]!,
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Colors.orange[600]!,
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Colors.orange[700]!,
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Colors.orange[800]!,
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Colors.orange[900]!,
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Colors.red[50]!,
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Colors.red[100]!,
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Colors.red[200]!,
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Colors.red[300]!,
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Colors.red[400]!,
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Colors.red[500]!,
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Colors.red[600]!,
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Colors.red[700]!,
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Colors.red[800]!,
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Colors.red[900]!,
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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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appBar: AppBar(
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title: const Text("DraggableScrollableActuator"),
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),
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body: DraggableScrollableActuator(
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child: Builder(
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builder: (ctx) => Column(
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children: [
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ElevatedButton(
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onPressed: () {
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DraggableScrollableActuator.reset(ctx);
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},
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child: const Text("重置位置"),
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),
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Expanded(
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child: buildSheet(),
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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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Widget buildSheet() => DraggableScrollableSheet(
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initialChildSize: 0.3,
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minChildSize: 0.2,
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maxChildSize: 1,
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expand: true,
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builder: (BuildContext context, ScrollController scrollController) =>
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ListView.builder(
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controller: scrollController,
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itemCount: data.length,
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itemBuilder: buildColorItem,
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),
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);
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Widget buildColorItem(BuildContext context, int index) {
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return Container(
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alignment: Alignment.center,
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height: 60,
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color: data[index],
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child: Text(
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colorString(data[index]),
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style: const TextStyle(color: Colors.white, shadows: [
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Shadow(color: Colors.black, offset: Offset(.5, .5), blurRadius: 2)
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]),
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),
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);
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}
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String colorString(Color color) =>
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"#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}";
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}
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