oxean_flutter_gantt 0.2.2

oxean_flutter_gantt: ^0.2.2 copied to clipboard

example/lib/main.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:oxean_flutter_gantt/config/gantt_chart_style_config.dart';
import 'package:oxean_flutter_gantt/models/gantt_task.dart';
import 'package:oxean_flutter_gantt/widgets/gantt_chart_widget.dart';

void main() {
  runApp(MyApp());
}

List<GanttTask> tasks = [
  // Use DateTime objects directly
  GanttTask(
      id: '1',
      name: 'Requirement Analysis',
      start: DateTime(2025, 3, 25),
      end: DateTime(2025, 3, 27),
      status: 'Done',
      color: Colors.green,
      progress: 1.0, // 100% complete
      details: 'Define project scope and goals.'),
  GanttTask(
      id: '2',
      name: 'Design Mockups',
      start: DateTime(2025, 3, 30),
      end: DateTime(2025, 4, 2),
      status: 'In progress',
      color: Colors.blue,
      progress: 0.8, // 80% complete
      details: 'Create and review UI/UX designs.',
      dependsOn: '1'),
  GanttTask(
      id: '3',
      name: 'Development Sprint 1',
      start: DateTime(2025, 4, 3),
      end: DateTime(2025, 4, 10),
      status: 'In progress',
      color: Colors.orange,
      progress: 0.6, // 60% complete
      details: 'Implement core features.',
      dependsOn: '2'),
  GanttTask(
      id: '4',
      name: 'Testing & QA',
      start: DateTime(2025, 4, 11),
      end: DateTime(2025, 4, 15),
      status: 'In progress',
      color: Colors.purple,
      progress: 0.3, // 30% complete
      details: 'Run test cases and fix bugs.',
      dependsOn: '3'),
  GanttTask(
      id: '5',
      name: 'Deployment Prep',
      start: DateTime(2025, 4, 16),
      end: DateTime(2025, 4, 17),
      status: 'In progress',
      color: Colors.red,
      details: 'Prepare servers and docs.'),
  GanttTask(
      id: '6',
      name: 'User Training',
      start: DateTime(2025, 4, 16),
      end: DateTime(2025, 4, 18),
      status: 'Pending',
      color: Colors.teal,
      progress: 0.0, // 0% complete (not started)
      details: 'Train end users.',
      dependsOn: '4'),
  GanttTask(
      id: '7',
      name: 'Deployment',
      start: DateTime(2025, 4, 19),
      end: DateTime(2025, 4, 20),
      status: 'Pending',
      color: Colors.amber,
      progress: 0.0, // 0% complete (not started)
      details: 'Go live with the product.',
      dependsOn: '5'),
  GanttTask(
      id: '8',
      name: 'Post-Deployment Support',
      start: DateTime(2025, 4, 21),
      end: DateTime(2025, 4, 25),
      status: 'Pending',
      color: Colors.cyan,
      progress: 0.0, // 0% complete (not started)
      details: 'Monitor and support users.',
      dependsOn: '7'),
  GanttTask(
      id: '9',
      name: 'Feedback Collection',
      start: DateTime(2025, 4, 26),
      end: DateTime(2025, 4, 30),
      status: 'Pending',
      color: Colors.indigo,
      progress: 0.0, // 0% complete (not started)
      details: 'Collect user feedback and suggestions.',
      dependsOn: '8'),
];

// ignore: must_be_immutable
class PageWidget extends StatelessWidget {
  late BuildContext context;

  PageWidget({super.key});

  @override
  Widget build(BuildContext context) {
    this.context = context; // Store the context for later use
    return Scaffold(
      appBar: AppBar(
        title: const Text('Gantt Chart'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: GanttChartWidget(
          tasks: tasks,
          style: const GanttStyleConfig(
            showProgressText: true,
          ),
          onTaskTap: _showTaskDetails,
          onDependencyDeleted: (GanttTask task) {
            // Handle dependency deletion
            ScaffoldMessenger.of(context).showSnackBar(
              SnackBar(
                content: Text('Dependency deleted for task: ${task.name}'),
              ),
            );
          },
          onDependencyCreated: (GanttTask task) {
            ScaffoldMessenger.of(context).showSnackBar(
              SnackBar(
                content: Text('Dependency created for task: ${task.name}'),
              ),
            );
          },
          onTaskDatesChanged: (GanttTask task) {
            if (kDebugMode) {
              print(
                  'Task dates changed: ${task.name} from ${task.start} to ${task.end}');
            }
          },
        ),
      ),
    );
  }

  void _showTaskDetails(GanttTask task) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: Text(task.name),
        content: SingleChildScrollView(
          child: ListBody(
            children: <Widget>[
              Text(task.details),
              const SizedBox(height: 10),
              Text('Start: ${task.start}'),
              Text('End: ${task.end}'),
              Text('Progress: ${((task.progress ?? 0) * 100).toInt()}%'),
              if (task.dependsOn != null)
                Text(
                  'Depends on: ${tasks.firstWhere(
                    (t) => t.id == task.dependsOn,
                    orElse: () {
                      return GanttTask(
                          id: '?',
                          name: 'Unknown Task',
                          start: DateTime.now(),
                          end: DateTime.now(),
                          status: 'Pending',
                          color: Colors.grey,
                          details: '');
                    },
                  ).name}',
                ),
            ],
          ),
        ),
        actions: <Widget>[
          TextButton(
            child: const Text('Close'),
            onPressed: () => Navigator.of(context).pop(),
          ),
        ],
      ),
    );
  }
}

// ignore: must_be_immutable
class MyApp extends StatelessWidget {
  MyApp({super.key});
  late BuildContext context;

  @override
  Widget build(BuildContext context) {
    this.context = context; // Store the context for later use
    return MaterialApp(
      title: 'Flutter Gantt Chart',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        useMaterial3: true, // Use Material 3 features like SegmentedButton
        // Optional: Define color scheme for better M3 look
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
      ),
      home: PageWidget(),
    );
  }
}