legacy_tree_grid 0.4.0

Display, filter, sort, select, and edit tabular data in a tree grid.

A powerful, flexible, and feature-rich data grid for Flutter, designed to handle client-side, server-side, and hierarchical (tree) data with ease.

The legacy_tree_grid provides a set of high-level widgets that simplify the display of tabular data, whether it's a small list managed on the client or a large, paginated dataset from a server.

About the Name

The name legacy_tree_grid is a tribute to the package's author, Patrick Legacy. It does not imply that the package is outdated or unmaintained. In fact, it is a modern, actively developed, and highly capable solution for building production-ready Flutter applications.

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Key Features

• Multiple Data Modes:
  • ClientSideDataGrid: Manages data entirely in-memory. Perfect for smaller, static datasets with built-in filtering, sorting, and pagination.
  • ServerSideDataGrid: Efficiently handles large datasets by delegating pagination, sorting, and filtering to a backend API.
• Tree Grid Support: Display hierarchical data with expandable/collapsible nodes, parent/child relationships, and indentation.
• Rich Column Configuration: Use DataColumnDef to precisely control column width (flex or width), alignment, sorting behavior, resizing, and custom cell rendering.
• Interactive: Built-in support for:
  • Single-column sorting (ascending/descending).
  • Per-column filtering with various types (string, numeric, date, list, boolean).
  • Row selection via a checkbox column.
  • Row tap events.
• Pagination: A responsive footer with automatic pagination controls for both client and server modes.
• Customization: Highly customizable rendering using builder functions (cellBuilder) for complete control over cell content.
• Responsive Footer: Action buttons (add, delete, refresh) automatically collapse into an overflow menu on smaller screens.
• And more... Column resizing, a "show deleted" toggle, UI scaling (zoom), and factory constructors for common column types like an "actions" menu.

Getting Started

Add the legacy_tree_grid package to your pubspec.yaml file.

dependencies:
  legacy_tree_grid: ^0.0.1 # Replace with the latest version

Then, run flutter pub get and import the package in your Dart file:

import 'package:legacy_tree_grid/legacy_tree_grid.dart';

Usage

Here is a complete example of a ClientSideDataGrid configured as a tree grid.

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

// 1. Define your data model
class Person {
  final String id;
  final String? parentId;
  final String name;
  final int age;

  Person({required this.id, this.parentId, required this.name, required this.age});
}

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

  // 2. Create your data source
  final List<Person> data = const [
    Person(id: '1', name: 'John Doe', age: 30),
    Person(id: '2', parentId: '1', name: 'Jane Doe', age: 28),
    Person(id: '3', parentId: '1', name: 'Jr. Doe', age: 5),
    Person(id: '4', name: 'Peter Pan', age: 12),
    Person(id: '5', parentId: '4', name: 'Wendy Darling', age: 10),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Tree Grid Example')),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        // 3. Use the ClientSideDataGrid widget
        child: ClientSideDataGrid<Person>(
          // Provide the data
          data: data,
          // Define how to map your object to a Map
          toMap: (person) => {
            'id': person.id,
            'parentId': person.parentId,
            'name': person.name,
            'age': person.age,
          },
          // Specify keys for tree structure and row identity
          rowIdKey: 'id',
          parentIdKey: 'parentId',
          // Enable tree mode
          isTree: true,
          // Define the columns
          columnDefs: [
            DataColumnDef(
              id: 'name',
              caption: 'Name',
              width: 250,
              // Mark this as the column that shows the tree hierarchy
              isNameColumn: true,
            ),
            DataColumnDef(
              id: 'age',
              caption: 'Age',
              width: 100,
              alignment: TextAlign.right,
              filterType: FilterType.numeric,
            ),
          ],
          // Enable features
          allowFiltering: true,
          showCheckboxColumn: true,
        ),
      ),
    );
  }
}

Additional Information

For more detailed examples, including ServerSideDataGrid usage, please check the /example folder in the repository.

If you encounter any issues or have feature requests, please file them on the issue tracker. We appreciate your feedback and contributions!