forked from lxm_flutter/FlutterUnit
114 lines
2.8 KiB
Dart
114 lines
2.8 KiB
Dart
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/// create by 张风捷特烈 on 2020/4/25
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/// contact me by email 1981462002@qq.com
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/// 说明:
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// {
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// "widgetId": 102,
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// "name": 'DataTable的sort',
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// "priority": 2,
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// "subtitle":
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// "【sortColumnIndex】 : 列号 【int】\n"
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// "【columnSpacing】 : 列间距 【double】\n"
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// "【sortAscending】 : 是否顺序 【bool】",
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// }
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import 'package:flutter/material.dart';
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class _BeanOp {
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final int id;
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final String name;
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final String type;
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bool select;
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_BeanOp(this.id, this.name, this.type, this.select);
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@override
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String toString() {
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return '_BeanOp{id: $id, name: $name, type: $type, select: $select}';
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}
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}
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class SortDataTable extends StatefulWidget {
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@override
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_SortDataTableState createState() => _SortDataTableState();
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}
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class _SortDataTableState extends State<SortDataTable> {
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var data = [
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_BeanOp(101, 'DataTable', 'StatelessWidget', false),
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_BeanOp(44, 'RangeSlider', 'StatefulWidget', false),
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_BeanOp(2, 'Text', 'StatelessWidget', false),
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_BeanOp(1, 'Image', 'StatefulWidget', false),
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];
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bool _sortAscending = false;
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var selectData = <_BeanOp>[];
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@override
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Widget build(BuildContext context) {
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return DataTable(
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columnSpacing: 20,
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sortColumnIndex: 1,
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sortAscending: _sortAscending,
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columns: [
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DataColumn(
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label: Container(
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child: Checkbox(
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value: selectData.length == data.length,
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onChanged: _onSelectAll,
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),
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),
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),
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DataColumn(label: Text('id'), numeric: false, onSort: _onSortId),
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DataColumn(label: Text('名称')),
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DataColumn(label: Text('类型')),
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],
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rows: data
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.map((e) => DataRow(selected: false, cells: [
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DataCell(Checkbox(
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value: e.select,
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onChanged: (v) => _onSelectOne(v, e),
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)),
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DataCell(Text('${e.id}')),
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DataCell(Text('${e.name}'),
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showEditIcon: true, onTap: () {}),
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DataCell(Text('${e.type}')),
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]))
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.toList());
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}
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_onSortId(int index, bool ascending) {
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setState(() {
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_sortAscending = ascending;
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data.sort(
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(a, b) => ascending ? a.id.compareTo(b.id) : b.id.compareTo(a.id));
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});
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}
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_onSelectOne(bool selected, _BeanOp e) {
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setState(() {
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if (selected) {
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//选中
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selectData.add(e);
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} else {
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selectData.remove(e);
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}
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e.select = selected;
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print(selectData);
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});
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}
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_onSelectAll(bool select) {
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setState(() {
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if (select) {
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data.forEach((e) => e.select = true);
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selectData = data.map((e) => e).toList();
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} else {
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data.forEach((e) => e.select = false);
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selectData = [];
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}
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});
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}
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} |