Dart & Flutter Packages by DevCetra.com & contributors.

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Summary

Provides methods to create plugins for Dart and Flutter. This package demonstrates ways to make Dart and Flutter even more modular.

Usage Example

import 'package:df_plugins/df_plugins.dart'; // for Flutter projects

// ignore_for_file: unnecessary_import
import 'package:df_plugins/df_plugins_dart.dart'; // for Dart-only projects

import 'package:flutter/material.dart';

// ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░

void main() {
  dartExample();
  flutterExample();
}

// ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
//
// Dart Plugins Example.
//
// This is an example of using Functional plugins to transform data in
// your app.
//
// ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░

void dartExample() {
  // Dart Plugins Example:
  final math = FunctionalPluginManager<num>();
  math.registerAll([
    const ValuePlugin(10),
    const AddPlugin(5),
    const MultiplyPlugin(2),
    const SubtractPlugin(3),
  ]);
  math.register(const AddPlugin(5));
  math.register(const MultiplyPlugin(2));
  math.register(const SubtractPlugin(3));
  final result = math.build();
  debugPrint('Total: $result'); // prints 27
}
// Define some plugins that manipulate numbers. These examples are simple, but
// you can imagine more complex plugins that perform more complex operations,
// such as matrix multiplication, image processing, or even machine learning.

final class ValuePlugin<T extends num> extends FunctionalPlugin<T> {
  final T value;
  const ValuePlugin(this.value);

  @override
  T execute(List<T> previousOutputs) {
    if (previousOutputs.isNotEmpty) {
      throw Exception('ValuePlugin must be the first plugin in the list.');
    }
    return value;
  }
}

final class AddPlugin<T extends num> extends FunctionalPlugin<T> {
  final T value;
  const AddPlugin(this.value);

  @override
  T execute(List<T> previousOutputs) {
    return previousOutputs.last + value as T;
  }
}

final class MultiplyPlugin<T extends num> extends FunctionalPlugin<T> {
  final T value;
  const MultiplyPlugin(this.value);

  @override
  T execute(List<T> previousOutputs) {
    return previousOutputs.last * value as T;
  }
}

final class SubtractPlugin<T extends num> extends FunctionalPlugin<T> {
  final T value;
  const SubtractPlugin(this.value);

  @override
  T execute(List<T> previousOutputs) {
    return previousOutputs.last - value as T;
  }
}

// ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
//
// Flutter Plugins Example.
//
// This is an example of using Widget plugins to add widgets to your app.
// Widget plugins could add modularity to your apps if properly implemented.
//
// ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░

void flutterExample() {
  runApp(const PluginApp());
}

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

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: Scaffold(
        // Also try:
        // - WidgetColumnPluginBuilder to draw plugins in a Column
        // - WidgetRowPluginBuilder to draw plugins in a Row
        // - WidgetWrapPluginBuilder to draw plugins in a Wrap
        // - WidgetStackPluginBuilder to draw plugins in a Stack
        // - WidgetTreePluginBuilder to draw plugins in a tree hierarchy.
        // - Extend WidgetPluginBuilder to define your own builder.
        body: WidgetTreePluginBuilder(
          plugins: [
            // Apply plugins in order, each Treeing the previous result.
            WidgetPlugin(child: Text('Hello Plugins!!!')),
            PaddingPlugin(padding: EdgeInsets.all(8.0)),
            BackgroundColorPlugin(color: Colors.yellow),
            PaddingPlugin(padding: EdgeInsets.all(20.0)),
            BackgroundColorPlugin(color: Colors.blue),
          ],
          child: SizedBox(),
        ),
      ),
    );
  }
}

/// A simple plugin that returns its child.
class WidgetPlugin extends AttachableWidgetPlugin {
  final Widget child;
  const WidgetPlugin({required this.child});

  @override
  Widget attach(BuildContext context, Widget child) {
    return child;
  }
}

/// A simple plugin that sets the background color of the widget.
class BackgroundColorPlugin extends AttachableWidgetPlugin {
  final Color color;
  const BackgroundColorPlugin({required this.color});

  @override
  Widget attach(BuildContext context, Widget child) {
    return Container(
      color: color,
      child: child,
    );
  }
}

/// A simple plugin that adds padding around the widget.
class PaddingPlugin extends AttachableWidgetPlugin {
  final EdgeInsets padding;
  const PaddingPlugin({required this.padding});

  @override
  Widget attach(BuildContext context, Widget child) {
    return Padding(
      padding: padding,
      child: child,
    );
  }
}

Installation

Use this package as a dependency by adding it to your pubspec.yaml file (see here).

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Contributing and Discussions

This is an open-source project, and we warmly welcome contributions from everyone, regardless of experience level. Whether you're a seasoned developer or just starting out, contributing to this project is a fantastic way to learn, share your knowledge, and make a meaningful impact on the community.

Ways you can contribute:

• Buy me a coffee: If you'd like to support the project financially, consider buying me a coffee. Your support helps cover the costs of development and keeps the project growing.
• Share your ideas: Every perspective matters, and your ideas can spark innovation.
• Report bugs: Help us identify and fix issues to make the project more robust.
• Suggest improvements or new features: Your ideas can help shape the future of the project.
• Help clarify documentation: Good documentation is key to accessibility. You can make it easier for others to get started by improving or expanding our documentation.
• Write articles: Share your knowledge by writing tutorials, guides, or blog posts about your experiences with the project. It's a great way to contribute and help others learn.

No matter how you choose to contribute, your involvement is greatly appreciated and valued!

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Chief Maintainer:

📧 Email Robert Mollentze at robmllze@gmail.com

Dontations:

If you're enjoying this package and find it valuable, consider showing your appreciation with a small donation. Every bit helps in supporting future development. You can donate here:

https://www.buymeacoffee.com/robmllze

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License

This project is released under the MIT License. See LICENSE for more information.