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