M3E Card List #

A Flutter package providing expressive, Material 3 card lists with dynamically rounded corners inside normal ListViews and CustomScrollViews (via slivers). It also provides a lightweight M3ECardColumn for static layouts.

It automatically calculates and draws the corners to fit exactly the Material 3 Expressive spec for adjacent items. It gives extensive customization options for developers including customizable splash ripples, custom border colors, custom elevation, and highly tunable haptic feedback.

Features #

• Dynamic border radius: The first and last items get a larger outer radius while adjoining cards receive a smaller inner radius seamlessly.
• Sliver Support: Provides SliverM3ECardList out of the box to beautifully tie into your complex CustomScrollViews and SliverAppBars.
• Lightweight Alternative: Use M3ECardColumn for static, non-interactive lists.
• Highly Customizable: Offers parameters for gap, innerRadius, outerRadius, padding, splashColor, highlightColor, and splashFactory.
• Haptic Feedback: Includes an easy API for haptic impact levels (no haptic, light, medium, heavy) on tap.

Usage #

Simply import the package and use M3ECardList, SliverM3ECardList or M3ECardColumn.

dependencies:
  m3e_card_list: ^0.0.1

import 'package:m3e_card_list/m3e_card_list.dart';

M3ECardList(
  itemCount: 5,
  itemBuilder: (context, index) {
      return Text('Data Item \$index');
  },
  onTap: (index) {
      print('Tapped \$index');
  },
  // Customize as needed:
  haptic: 3, // 0: None, 1: Light, 2: Medium, 3: Heavy
  splashColor: Colors.teal.withOpacity(0.2),
  highlightColor: Colors.teal.withOpacity(0.1),
);

To entirely remove the ripple effect from a card list, use the splashFactory: NoSplash.splashFactory combined with transparent splash/highlight colors.

M3ECardList(
  itemCount: 2,
  itemBuilder: (context, index) => Text('No ripple here!'),
  splashColor: Colors.transparent,
  highlightColor: Colors.transparent,
  splashFactory: NoSplash.splashFactory,
  onTap: (index) {},
)

Static Column Example #

If you don't need the performance overhead of a ListView.builder for small lists, you can use the lightweight M3ECardColumn. It is a simple wrapper for Column that supports all the same InkWell ripples, haptics, and customizations!

M3ECardColumn(
  children: [
    Text('Static Item 1'),
    Text('Static Item 2'),
    Text('Static Item 3'),
  ],
);

Sliver Example #

For use inside a CustomScrollView:

CustomScrollView(
  slivers: [
    SliverM3ECardList(
      itemCount: 10,
      itemBuilder: (context, index) => Text('Sliver Item \$index'),
      onTap: (index) {},
    ),
  ],
)

Additional information #

Check out the example folder for a fully-featured showcase app demonstrating how to use both normal and sliver lists, along with dynamic theming.