flutter_graph_view 0.0.1+5

Widgets for beautiful graphic data structures, such as force-oriented diagrams.

example/lib/main.dart

// Copyright (c) 2023- All flutter_graph_view authors. All rights reserved.
//
// This source code is licensed under Apache 2.0 License.

import 'dart:math';

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

void main() {
  var vertexes = <Map>{};
  var r = Random();
  for (var i = 0; i < 200; i++) {
    vertexes.add(
      {
        'id': 'node$i',
        'tag': 'tag${r.nextInt(9)}',
      },
    );
  }
  var edges = <Map>{};

  for (var i = 0; i < 200; i++) {
    edges.add({
      'srcId': 'node${i % 4}',
      'dstId': 'node$i',
      'edgeName': 'edge${r.nextInt(3)}',
      'ranking': r.nextInt(DateTime.now().millisecond),
    });
  }

  for (var i = 0; i < 20; i++) {
    edges.add({
      'srcId': 'node${r.nextInt(vertexes.length)}',
      'dstId': 'node${r.nextInt(vertexes.length)}',
      'edgeName': 'edge${r.nextInt(3)}',
      'ranking': r.nextInt(DateTime.now().millisecond),
    });
  }

  var data = {
    'vertexes': vertexes,
    'edges': edges,
  };

  runApp(MaterialApp(
    home: Scaffold(
      body: FlutterGraphWidget(
        data: data,
        algorithm: ForceDirected(),
        convertor: MapConvertor(),
        options: Options()
          ..vertexPanelBuilder = (hoverVertex) {
            if (hoverVertex == null) {
              return Container();
            }
            return Stack(
              children: [
                Positioned(
                  left:
                      hoverVertex.cpn!.position.x + hoverVertex.cpn!.radius + 5,
                  top: hoverVertex.cpn!.position.y - 20,
                  child: SizedBox(
                    width: 120,
                    child: ColoredBox(
                      color: Colors.white,
                      child: ListTile(
                        title: Text(
                          'Id: ${hoverVertex.id}',
                        ),
                        subtitle: Text(
                            'Tag: ${hoverVertex.data['tag']}\nDegree: ${hoverVertex.degree}'),
                      ),
                    ),
                  ),
                )
              ],
            );
          },
      ),
    ),
  ));
}