legacy_pert_chart #

Sovereign Logic. Native Performance. #

A high-performance PERT (Program Evaluation and Review Technique) and Network Diagram widget for Flutter. Unlike competitors that require "Server Modules" or Node.js middleware to handle layout logic, legacy_pert_chart runs its advanced PertLayout engine 100% on-device.

Features #

• No Server Sidecars: The layout logic is compiled native Dart. It does not require a backend service to calculate ranks or lanes.
• Automated Ranking Algorithm: The PertLayout engine automatically organizes thousands of non-linear dependencies into logical flow-states, revealing structure in chaotic data.
• Seamless Integration: Built on the same LegacyGanttTask models as legacy_gantt_chart, allowing you to switch between Gantt and PERT views instantly.
• Full Customization: Supports custom nodeBuilder functions, giving you complete control over the look and feel of every node.
• Interactive: Native Flutter performance with smooth zooming, panning, and hit-testing (120 FPS).

Getting Started #

Add the package to your pubspec.yaml:

dependencies:
  legacy_pert_chart: ^0.0.1

Usage #

import 'package:flutter/material.dart';
import 'package:legacy_pert_chart/legacy_pert_chart.dart';
import 'package:legacy_gantt_chart/legacy_gantt_chart.dart';

class MyPertChart extends StatelessWidget {
  final List<LegacyGanttTask> tasks;

  const MyPertChart({super.key, required this.tasks});

  @override
  Widget build(BuildContext context) {
    return LegacyPertChartWidget(
      tasks: tasks,
      nodeBuilder: (context, task, layout) {
        return Container(
          decoration: BoxDecoration(
            color: Colors.blue,
            borderRadius: BorderRadius.circular(8),
          ),
          child: Center(child: Text(task.name)),
        );
      },
    );
  }
}

Enterprise Integration #

This package is part of the GanttSync Ecosystem.

• FOSS Core: The UI and layout logic are 100% free and open source (MIT). We Don't Gate Pixels.
• Real-Time Sync: Connect this chart to GanttSync for offline-first, real-time collaboration. The Enterprise edition provides "Sync-Aware Controllers" that handle live updates, multi-user cursors, and instant critical path recalculation across the network.

Learn more about GanttSync