flutter - DataTable 列宽问题

Question

我正在尝试构建一个完整的宽度DataTable，Flutter左侧有一个固定宽度的列，另外两列应该将剩余的列分开。

但是，即使左侧标题文本被截断，中间和右侧列也不会占用剩余宽度，如下所示：

当文本太宽而无法在单行中显示时，我还想将文本包装在一个单元格中，但Wrap不能按预期工作。

我该如何解决我的问题？

这是代码：

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Column(children: [
          Expanded(
            child: Container(
              constraints: BoxConstraints.expand(width: double.infinity),
              child: SingleChildScrollView(
                child: DataTable(
                    headingRowHeight: 32,
                    dataRowHeight: 24,
                    columns: [
                      DataColumn(
                        label: ConstrainedBox(
                          constraints: BoxConstraints(
                            maxWidth: 20,
                            minWidth: 20,
                          ),
                          child: Text('Short column'),
                        ),
                      ),
                      DataColumn(label: Text('Long column')),
                      DataColumn(label: Text('Long column')),
                    ],
                    rows: [
                      DataRow(
                        cells: [
                          DataCell(
                            ConstrainedBox(
                              constraints: BoxConstraints(
                                maxWidth: 20,
                                minWidth: 20,
                              ),
                              child: Text('1'),
                            ),
                          ),
                          DataCell(
                            Wrap(
                              children: [
                                Text(
                                    """Some long content i would like to be wrapped when column width is not
                              enought to fully display it"""),
                              ],
                            ),
                          ),
                          DataCell(Text('Some more text')),
                        ],
                      ),
                      DataRow(
                        cells: [
                          DataCell(Container(
                            color: Colors.pink,
                            child: ConstrainedBox(
                              constraints: BoxConstraints(
                                maxWidth: 20,
                                minWidth: 20,
                              ),
                              child: Text('2'),
                            ),
                          )),
                          DataCell(
                            Wrap(
                              children: [
                                Container(
                                    color: Colors.yellow,
                                    child: Text(
                                        """Some long content i would like to be wrapped when column width is not
                              enought to fully display it""")),
                              ],
                            ),
                          ),
                          DataCell(Text('Some more text')),
                        ],
                      )
                    ]),
              ),
            ),
          ),
        ]),
      ),
    );
  }
}

编辑

感谢@awaik 的回答，但在您的示例中，表格没有占据整个设备宽度，它仍然在中间有一个大屏幕，这不是我想要的。

此外，行高是恒定的，如果内容需要更高的高度，它不会增加。

有什么可以做的吗？

标签： flutterdatatablewidthflutter-desktop

Answer 1

DataTable 有一些默认值：

DataTable({
  Key key,
  @required this.columns,
  this.sortColumnIndex,
  this.sortAscending = true,
  this.onSelectAll,
  this.dataRowHeight = kMinInteractiveDimension,
  this.headingRowHeight = 56.0,
  this.horizontalMargin = 24.0,
  this.columnSpacing = 56.0,

在删除了一些小部件的固定示例下方。

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: SafeArea(
          child: DataTable(
            horizontalMargin: 6.0,
            columnSpacing: 6.0,
            headingRowHeight: 32.0,
            dataRowHeight: 100.0,
            columns: [
              DataColumn(
                label: ConstrainedBox(
                  constraints: BoxConstraints(
                    maxWidth: 20,
                    minWidth: 20,
                  ),
                  child: Text('Short column'),
                ),
              ),
              DataColumn(label: Text('Long column')),
              DataColumn(label: Text('Three')),
            ],
            rows: [
              DataRow(
                cells: [
                  DataCell(
                    Text('1'),
                  ),
                  DataCell(
                    Container(
                      child: Text(
                        'Some long content i would like to be wrapped ',
                      ),
                    ),
                  ),
                  DataCell(Text('Some more text')),
                ],
              ),
              DataRow(
                cells: [
                  DataCell(Container(
                    color: Colors.pink,
                    child: Text('2'),
                  )),
                  DataCell(
                      Container(
                        height: 500,
                        color: Colors.yellow,
                        child: Text(
                          'Some long content i would like to be wrapped when column width is not enought to fully display itSome long content i would like to be wrapped when column width is not display it Some long content i would like to be wrapped when column width is not enought to fully display itSome long content i would like to be wrapped when column width is not display it Some long content i would like to be wrapped when column width is not enought to fully display itSome long content i would like to be wrapped when column width is not display it 555',
                        ),
                      ),
                      placeholder: false),
                  DataCell(Text('Some more text')),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }
}

编辑

1. 向上的代码已更新。
2. 表格不是全宽的，因为我们使用了带有树“””的多行字符串。如果我们使用常规字符串，则行为是正常的。

3. 行高在构造函数中设置，不能动态更改。

   孩子：DataTable（水平边距：6.0，columnSpacing：6.0，headingRowHeight：32.0，dataRowHeight：100.0，

最后，我个人的观点 - 创建自己的小部件而不是使用它更容易DataTable