How to fill a widget to the full available Row height

Question

The layout looks like this:

Here is a Row, which is inside ListView. Inside it's a Column with Text widgets, leading and trailing widgets. The problem is that the leading widget has to fill the free height of the Row. The Row height is determined by the Column with the Text widgets, and the leading widget should adjust to this size and not try to increase the Row height to infinity (for example, the leading widget can be a colored Container with infinite height and given width). Is it possible to do this?

Answer 1

Use crossAxisAlignment: CrossAxisAlignment.stretch to fill the height of a Row (width of a Column), i.e. to stretch along the CrossAxis.

Use Expanded widgets to fill the space along the MainAxis The flex attributes will determine the proportion of each widget.

For the trailing widget, just use a Center widget to center it.

In order to have your Row inside a ListView, stretching to the height of the tallest child, put the Row inside an IntrinsicHeight widget.

import 'package:flutter/material.dart';

void main() {
  runApp(
    MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Row and Column',
      home: Scaffold(
        body: ListView(
          children: [
            IntrinsicHeight(
              child: Row(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  Expanded(child: MyWidget()),
                  Expanded(
                    flex: 3,
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.stretch,
                      children: [
                        MyTextWidget(
                          text:
                              'I like to believe that science is becoming mainstream.',
                        ),
                        MyTextWidget(
                          text:
                              'There is no known objects accounting for most of the effective gravity in the universe.',
                        ),
                        MyTextWidget(
                          text: "Let's explore because it's fun.",
                        ),
                      ],
                    ),
                  ),
                  Expanded(
                    child: Center(
                      child: SizedBox(height: 40.0, child: MyWidget()),
                    ),
                  ),
                ],
              ),
            ),
            Spacer(),
          ],
        ),
      ),
    ),
  );
}

class MyTextWidget extends StatelessWidget {
  final String text;

  const MyTextWidget({Key key, this.text}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: Container(
        padding: const EdgeInsets.all(4.0),
        color: Colors.blueGrey,
        child: Text(text),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: Container(color: Colors.blueGrey),
    );
  }
}
import 'package:flutter/material.dart';

void main() {
  runApp(
    MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Row and Column',
      home: Scaffold(
        body: ListView(
          children: [
            IntrinsicHeight(
              child: Row(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  Expanded(child: MyWidget()),
                  Expanded(
                    flex: 3,
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.stretch,
                      children: [
                        MyTextWidget(
                          text:
                              'I like to believe that science is becoming mainstream.',
                        ),
                        MyTextWidget(
                          text:
                              'There is no known objects accounting for most of the effective gravity in the universe.',
                        ),
                        MyTextWidget(
                          text: "Let's explore because it's fun.",
                        ),
                      ],
                    ),
                  ),
                  Expanded(
                    child: Center(
                      child: SizedBox(height: 40.0, child: MyWidget()),
                    ),
                  ),
                ],
              ),
            ),
            Spacer(),
          ],
        ),
      ),
    ),
  );
}

class MyTextWidget extends StatelessWidget {
  final String text;

  const MyTextWidget({Key key, this.text}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: Container(
        padding: const EdgeInsets.all(4.0),
        color: Colors.blueGrey,
        child: Text(text),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: Container(color: Colors.blueGrey),
    );
  }
}