design_grid 0.0.2

Implement designs just like your designer intended. Use either the classic responsive design grid approach or go with the Material Design Layout.

example/lib/main.dart

import 'package:design_grid/design_grid.dart';
import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  Brightness brightness = Brightness.light;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Design Grid Example',
      theme: ThemeData(
        useMaterial3: true,
        colorScheme: ColorScheme.fromSeed(
          seedColor: Colors.blue,
          brightness: brightness,
        ),
      ),
      home: Scaffold(
        appBar: AppBar(
          leading: const Icon(Icons.grid_on_rounded),
          actions: [
            IconButton(
              onPressed: () => setState(() {
                brightness = brightness == Brightness.dark ? Brightness.light : Brightness.dark;
              }),
              icon: brightness == Brightness.dark
                  ? const Icon(Icons.light_mode_rounded)
                  : const Icon(Icons.dark_mode_rounded),
            ),
          ],
          title: const Text('Design Grid Example'),
        ),
        body: ListView(
          padding: const EdgeInsets.symmetric(vertical: 16.0),
          children: const [
            ResponsiveDesignGridExample(),
            Divider(
              height: 64.0,
            ),
            MaterialDesignGridExample(),
          ],
        ),
      ),
    );
  }
}

class ResponsiveDesignGridExample extends StatelessWidget {
  const ResponsiveDesignGridExample({super.key});

  @override
  Widget build(BuildContext context) {
    // The ResponsiveDesignGridConfig widget is used to configure the ResponsiveDesignGrid.
    // This widget should be placed as high up in the widget tree as possible.
    // You can also pass a custom theme to change row spacing, column spacing, the grid outer padding and even the number of columns for the grid.
    return ResponsiveDesignGridConfig(
      // The ResponsiveDesignGridDebugOverlay is a useful widget to visually debug your grid implementation.
      child: ResponsiveDesignGridDebugOverlay(
        child: ResponsiveDesignGrid(
          children: [
            // This is a responsive design grid row. Contrary to Flutter's Row widget, this is more a logical separation and will wrap its children if necessary.
            // Keep your rows as small as possible. To enforce a visual line break, prefer using a new Responsive Design Grid Row.
            // For some rare occasions, there is the ResponsiveDesignGridBreak widget which enforces a visual line break within a row.
            ResponsiveDesignGridRow(
              alignment: DesignGridRowAlignment.center,
              children: [
                // This is a responsive design grid item, which spans 12 columns on small screens, 10 columns on medium screens, 8 columns on large screens, and 6 columns on extra large screens.
                ResponsiveDesignGridItem(
                  columns: const ResponsiveDesignGridColumns(
                    small: 12,
                    medium: 8,
                    large: 6,
                    extraLarge: 4,
                  ),
                  // The child widget will be wrapped in a SizedBox widget with constrained width according to the columns property.
                  child: Card(
                    child: Column(
                      children: const [
                        ListTile(
                          title: Text('Responsive Design Grid'),
                        ),
                        Padding(
                          padding: EdgeInsets.all(16.0),
                          child: Text(
                              'This example shows how to use the ResponsiveDesignGrid. This element spans 12 columns on small screens, 10 columns on medium screens, 8 columns on large screens, and 6 columns on extra large screens.\nThe floating action button toggles the debug overlay.'),
                        ),
                      ],
                    ),
                  ),
                ),
              ],
            ),
            ResponsiveDesignGridRow(
              alignment: DesignGridRowAlignment.center,
              children: [
                ResponsiveDesignGridItem(
                  columns: const ResponsiveDesignGridColumns(
                    small: 12,
                    medium: 10,
                    large: 8,
                  ),
                  child: TextFormField(
                    decoration: const InputDecoration(
                      labelText: 'Name*',
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
              ],
            ),
            ResponsiveDesignGridRow(
              alignment: DesignGridRowAlignment.center,
              children: [
                ResponsiveDesignGridItem(
                  columns: const ResponsiveDesignGridColumns(
                    small: 12,
                    medium: 5,
                    large: 4,
                  ),
                  child: TextFormField(
                    decoration: const InputDecoration(
                      labelText: 'E-Mail*',
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
                ResponsiveDesignGridItem(
                  columns: const ResponsiveDesignGridColumns(
                    small: 12,
                    medium: 5,
                    large: 4,
                  ),
                  child: TextFormField(
                    decoration: const InputDecoration(
                      labelText: 'Phone (optional)',
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
              ],
            ),
            ResponsiveDesignGridRow(
              alignment: DesignGridRowAlignment.center,
              children: [
                ResponsiveDesignGridItem(
                  columns: const ResponsiveDesignGridColumns(
                    small: 12,
                    medium: 10,
                    large: 8,
                  ),
                  child: TextFormField(
                    minLines: 4,
                    maxLines: 4,
                    decoration: const InputDecoration(
                      labelText: 'Message*',
                      alignLabelWithHint: true,
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
              ],
            ),
            const ResponsiveDesignGridRow(
              alignment: DesignGridRowAlignment.center,
              children: [
                ResponsiveDesignGridItem(
                  columns: ResponsiveDesignGridColumns(
                    small: 12,
                    medium: 10,
                    large: 8,
                  ),
                  child: Text(
                      'Iste aut cupiditate adipisci et iste incidunt est animi. Voluptatem natus reiciendis magni nesciunt magni. Reiciendis ad beatae. Odit corrupti eos voluptatem molestiae voluptatem qui rerum animi officiis. Natus dolores provident excepturi nostrum omnis voluptatem.'),
                ),
              ],
            ),
            ResponsiveDesignGridRow(
              alignment: DesignGridRowAlignment.end,
              children: [
                ResponsiveDesignGridItem(
                  columns: const ResponsiveDesignGridColumns(
                    small: 12,
                    medium: 4,
                    large: 3,
                  ),
                  child: ElevatedButton(
                    onPressed: () {},
                    child: const Text('Submit'),
                  ),
                ),
                ResponsiveDesignGridItem.placeholder(
                  columns: const ResponsiveDesignGridColumns(
                    small: 0,
                    medium: 1,
                    large: 2,
                  ),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

class MaterialDesignGridExample extends StatelessWidget {
  const MaterialDesignGridExample({super.key});

  @override
  Widget build(BuildContext context) {
    // The MaterialDesignGridTheme widget is used to configure the MaterialDesignGrid.
    // Place this widget as high up in the widget tree as possible.
    // You can also pass a custom theme to change spacings and even custom breakpoints.
    // The breakpoints control how many columns there are, the outer padding and the (optional) maximum body width.
    return MaterialDesignGridTheme(
      // The MaterialDesignGridDebugOverlay is a useful widget to visually debug your grid implementation.
      child: MaterialDesignGridDebugOverlay(
        child: MaterialDesignGrid(
          children: [
            // This is a Material Design Grid Row, contrary to Flutter's Row widget, this one wraps children when necessary.
            // Keep your rows as small as possible. To enforce a visual line break, prefer using a new Material Design Grid Row.
            // For some rare occasions, there is the MaterialDesignGridBreak widget which enforces a visual line break within a row.
            MaterialDesignGridRow(
              children: [
                // Material Design Grid Items are given a fixed column span, which must not be greater then the smallest amount of columns defined in the breakpoints. (By default, this is 4 columns)
                MaterialDesignGridItem(
                  columns: 4,
                  child: Card(
                    child: Column(
                      children: const [
                        ListTile(
                          title: Text('Material Design Grid'),
                        ),
                        Padding(
                          padding: EdgeInsets.all(16.0),
                          child: Text(
                              'This is a Material Design Grid example. The Material Design Grid uses a varying number of columns depending on the screen size. Its children are given a fixed number of columns.\nThe floating action button toggles the debug overlay.'),
                        ),
                      ],
                    ),
                  ),
                ),
              ],
            ),
            MaterialDesignGridRow(
              children: [
                MaterialDesignGridItem(
                  columns: 4,
                  child: TextFormField(
                    decoration: const InputDecoration(
                      labelText: 'Name*',
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
              ],
            ),
            MaterialDesignGridRow(
              children: [
                MaterialDesignGridItem(
                  columns: 4,
                  child: TextFormField(
                    decoration: const InputDecoration(
                      labelText: 'E-Mail*',
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
                MaterialDesignGridItem(
                  columns: 4,
                  child: TextFormField(
                    decoration: const InputDecoration(
                      labelText: 'Phone (optional)',
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
              ],
            ),
            MaterialDesignGridRow(
              children: [
                MaterialDesignGridItem(
                  columns: 4,
                  child: TextFormField(
                    minLines: 4,
                    maxLines: 4,
                    decoration: const InputDecoration(
                      labelText: 'Message*',
                      alignLabelWithHint: true,
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
              ],
            ),
            const MaterialDesignGridRow(
              children: [
                MaterialDesignGridItem(
                  columns: 4,
                  child: Text(
                      'Iste aut cupiditate adipisci et iste incidunt est animi. Voluptatem natus reiciendis magni nesciunt magni. Reiciendis ad beatae. Odit corrupti eos voluptatem molestiae voluptatem qui rerum animi officiis. Natus dolores provident excepturi nostrum omnis voluptatem.'),
                ),
              ],
            ),
            MaterialDesignGridRow(
              children: [
                MaterialDesignGridItem(
                  columns: 4,
                  child: ElevatedButton(
                    onPressed: () {},
                    child: const Text('Submit'),
                  ),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}