flexible_grid_view_plus 1.1.0

Flexible grid view is a Flutter package that simplifies the process of creating a grid view. With FlexibleGridView, you don't need to specify the height of your children widgets.

Flexible Grid View Plus

A Flutter package that provides a flexible grid view, making it easier to create grid layouts with dynamic child heights. With Flexible Grid View Plus, you don't have to worry about setting the fixed height or aspect ratio for your children widgets.

Table of Contents

• About Flexible Grid View Plus
• Installation
• Usage
  • Standard Usage
  • Builder Usage
• API
• Layouts
• Conclusion

About Flexible Grid View Plus

Flexible Grid View Plus simplifies grid creation in Flutter by allowing children widgets to have any height. This is much more convenient than using the default GridView widget, which often requires setting a fixed height or aspect ratio.

Installation

Add flexible_grid_view_plus as a dependency in your pubspec.yaml file:

dependencies:
  flexible_grid_view_plus: ^1.1.0

Then run flutter pub get to install the package.

Usage

Standard Usage

To use FlexibleGridViewPlus with a pre-built list of widgets, import the package and use the widget as follows:

import 'package:flexible_grid_view_plus/flexible_grid_view_plus.dart';
import 'dart:math';

FlexibleGridViewPlus(
  children: List.generate(
    20,
    (index) => Container(
      color: Colors.blue,
      height: 100 + Random().nextInt(100).toDouble(),
    ),
  ),
  axisCount: GridLayoutEnum.threeElementsInRow,
  crossAxisSpacing: 8,
  mainAxisSpacing: 8,
  padding: const EdgeInsets.all(16),
);

Builder Usage

The builder constructor works similarly to ListView.builder and lets you provide a list of data items along with a builder function that receives the index and the item itself:

FlexibleGridViewPlus.builder(
  padding: const EdgeInsets.all(16),
  axisCount: GridLayoutEnum.twoElementsInRow,
  mainAxisSpacing: 16,
  crossAxisSpacing: 16,
  items: demoData,
  itemBuilder: (context, index, item) {
    return CatalogCard(catalogItem: item);
  },
),

API

The FlexibleGridViewPlus widget supports two usage patterns: a standard version with a list of children and a builder version that accepts a list of items of type T.

Common Parameters

• axisCount (GridLayoutEnum):
  The number of elements to be displayed in each row. Defaults to GridLayoutEnum.twoElementsInRow.

• crossAxisSpacing (double):
  The spacing between columns in the grid. Defaults to 8.

• mainAxisSpacing (double):
  The spacing between rows in the grid. Defaults to 8.

• shrinkWrap (bool):
  Whether the grid should be allowed to shrink-wrap its contents. Defaults to false.

• physics (ScrollPhysics?):
  The physics for the scrollable grid view. Defaults to null.

• controller (ScrollController?):
  The controller for the scrollable widget. Defaults to null.

• reverse (bool):
  Whether the grid should be displayed in reverse order. Defaults to false.

• padding (EdgeInsetsGeometry?):
  The padding to be applied to the scrollable widget. Defaults to null.

• crossAxisAlignment (CrossAxisAlignment):
  The cross-axis alignment for the children in each row. Defaults to CrossAxisAlignment.start.

• mainAxisSeparatorBuilder (Widget Function(BuildContext context)?):
  A builder for the separator widget between rows. If provided, it will override the default mainAxisSpacing.

• crossAxisSeparatorBuilder (Widget Function(BuildContext context)?):
  A builder for the separator widget between columns. If provided, it will override the default crossAxisSpacing.

Standard Constructor Specific

• children (List<Widget>):
  A list of widgets to be directly displayed in the grid.

Builder Constructor Specific

• items (List<T>):
  A list of elements of type T that will be used to lazily build the grid.

• itemBuilder (Widget Function(BuildContext context, int index, T item)):
  A builder function that receives the build context, the index, and the item of type T for that position, and returns the corresponding widget.

Layouts

The package uses the GridLayoutEnum enum to determine the number of elements per row. The enum includes:

• GridLayoutEnum.twoElementsInRow:
  Two elements per row.

• GridLayoutEnum.threeElementsInRow:
  Three elements per row.

• GridLayoutEnum.fourElementsInRow:
  Four elements per row.

Internally, different layout widgets (TwoColumnRowLayout, ThreeColumnRowLayout, and FourColumnRowLayout) are used to arrange grid items based on the selected axisCount.

Conclusion

Flexible Grid View Plus was inspired by the original package and the work of egortabula.dev. This package aims to simplify the creation of dynamic grids in Flutter by eliminating the need to set fixed heights or aspect ratios for grid items and providing both standard and builder-based usage options.