forked from lxm_flutter/FlutterUnit
151 lines
4.0 KiB
Dart
151 lines
4.0 KiB
Dart
import 'package:flutter/material.dart';
|
|
|
|
/// create by 张风捷特烈 on 2020-03-30
|
|
/// contact me by email 1981462002@qq.com
|
|
/// 说明:
|
|
// {
|
|
// "widgetId": 177,
|
|
// "name": 'ReorderableListView基本使用',
|
|
// "priority": 1,
|
|
// "subtitle":
|
|
// "【children】 : 子组件列表 【List<Widget>】\n"
|
|
// "【header】 : 头部组件 【Widget】\n"
|
|
// "【padding】 : 内边距 【EdgeInsets】\n"
|
|
// "【onReorder】 : 调换时回调 【ReorderCallback】",
|
|
// }
|
|
class CustomReorderableListView extends StatefulWidget {
|
|
@override
|
|
_CustomReorderableListViewState createState() => _CustomReorderableListViewState();
|
|
}
|
|
|
|
class _CustomReorderableListViewState extends State<CustomReorderableListView> {
|
|
var data = <Color>[
|
|
Colors.yellow[50],
|
|
Colors.yellow[100],
|
|
Colors.yellow[200],
|
|
Colors.yellow[300],
|
|
Colors.yellow[400],
|
|
Colors.yellow[500],
|
|
Colors.yellow[600],
|
|
Colors.yellow[700],
|
|
Colors.yellow[800],
|
|
Colors.yellow[900],
|
|
];
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Container(
|
|
height: 250,
|
|
child: ReorderableListView(
|
|
padding: EdgeInsets.all(10),
|
|
header: Container(
|
|
color: Colors.blue,
|
|
alignment: Alignment.center,
|
|
height: 50,
|
|
child: Text('长按拖拽进行换位',style: TextStyle(color: Colors.white),)),
|
|
onReorder: _handleReorder,
|
|
children: data.map((color) => _buildItem(color)).toList(),
|
|
),
|
|
);
|
|
}
|
|
|
|
void _handleReorder(int oldIndex, int newIndex) {
|
|
if (oldIndex < newIndex) {
|
|
newIndex -= 1;
|
|
}
|
|
|
|
setState(() {
|
|
final element = data.removeAt(oldIndex);
|
|
data.insert(newIndex, element);
|
|
});
|
|
|
|
}
|
|
|
|
Widget _buildItem(Color color) {
|
|
return Container(
|
|
key: ValueKey(color) ,
|
|
alignment: Alignment.center,
|
|
height: 50,
|
|
color: color,
|
|
child: Text(
|
|
colorString(color),
|
|
style: TextStyle(color: Colors.white, shadows: [
|
|
Shadow(color: Colors.black, offset: Offset(.5, .5), blurRadius: 2)
|
|
]),
|
|
),
|
|
);
|
|
}
|
|
|
|
String colorString(Color color) =>
|
|
"#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}";
|
|
}
|
|
// {
|
|
// "widgetId": 177,
|
|
// "name": 'ReorderableListView滑动方向',
|
|
// "priority": 2,
|
|
// "subtitle":
|
|
// "【scrollDirection】 : 滑动方向 【Axis】\n"
|
|
// "【reverse】 : 是否反向 【bool】",
|
|
// }
|
|
class DirectionReorderableListView extends StatefulWidget {
|
|
@override
|
|
_DirectionReorderableListViewState createState() => _DirectionReorderableListViewState();
|
|
}
|
|
|
|
class _DirectionReorderableListViewState extends State<DirectionReorderableListView> {
|
|
var data = <Color>[
|
|
Colors.yellow[50],
|
|
Colors.yellow[100],
|
|
Colors.yellow[200],
|
|
Colors.yellow[300],
|
|
Colors.yellow[400],
|
|
Colors.yellow[500],
|
|
Colors.yellow[600],
|
|
Colors.yellow[700],
|
|
Colors.yellow[800],
|
|
Colors.yellow[900],
|
|
];
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Container(
|
|
height: 200,
|
|
child: ReorderableListView(
|
|
scrollDirection: Axis.horizontal,
|
|
reverse: false,
|
|
onReorder: _handleReorder,
|
|
children: data.map((color) => _buildItem(color)).toList(),
|
|
),
|
|
);
|
|
}
|
|
|
|
void _handleReorder(int oldIndex, int newIndex) {
|
|
if (oldIndex < newIndex) {
|
|
newIndex -= 1;
|
|
}
|
|
|
|
setState(() {
|
|
final element = data.removeAt(oldIndex);
|
|
data.insert(newIndex, element);
|
|
});
|
|
|
|
}
|
|
|
|
Widget _buildItem(Color color) {
|
|
return Container(
|
|
key: ValueKey(color) ,
|
|
alignment: Alignment.center,
|
|
width: 80,
|
|
color: color,
|
|
child: Text(
|
|
colorString(color),
|
|
style: TextStyle(color: Colors.white, shadows: [
|
|
Shadow(color: Colors.black, offset: Offset(.5, .5), blurRadius: 2)
|
|
]),
|
|
),
|
|
);
|
|
}
|
|
|
|
String colorString(Color color) =>
|
|
"#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}";
|
|
} |