🌳 Novident Tree View

This package provides a flexible solution for displaying hierarchical data structures while giving developers full control over node management. Unlike traditional tree implementations that enforce controller-based architectures, this package operates on simple data types that you extend to create your node hierarchy. Nodes become self-aware of their state changes through Listenable patterns, enabling reactive updates without complex state management.

💡 Motivation

We've investigated several alternatives that allow for convenient node tree creation with a standards-compliant implementation. But, we couldn't find one that satisfies our requirements. Most of these implementations required initializing a controller or similar to allow for a proper flow of actions within the tree.

However, for Novident, this isn't what we're looking for. Our goal is to create a common solution that allows us to:

• Listen for changes to Nodes manually
• Send or force updates to specific Nodes
• Have a common operation flow (insert, delete, move, or update) for nodes within the tree that depends on the user's implementation and not the package (complete control over them)
• Better support for Node configuration

This is why we decided to create this package, which adds everything Novident requires in one place.

In this package, we can simply add a few configurations and leave everything else to it, as our own logic can create a beautiful file/node tree without too much code or the need for drivers.

📦 Installation

Add to your pubspec.yaml:

dependencies:
  novident_tree_view: <latest_version>
  novident_nodes: <lastest_version>

Basic usage

import 'package:novident_tree_view/novident_tree_view.dart';

final Widget tree = TreeView(
   root: yourRootContainer,
   configuration: TreeConfiguration(
     components: [MyNodeBuilder(), AnotherNodeBuilder()],
     draggableConfigurations: DraggableConfigurations(/*...*/),
     indentConfiguration: IndentConfiguration.basic(/*...*/),
     onHoverContainer: (node) => debugPrint('Hovering: ${node.details.id}'),
     activateDragAndDropFeature: !kIsWeb, // Disable on web
     addRepaintBoundaries: true,
   ), 
);

🔎 Resources

Since there's a lot to explain and implement, we prefer to provide a separate document for each section to explain more concretely and accurately what each point entails.

• 📲 Components: In this section, we explain what a NodeComponentBuilder (which is responsible for rendering nodes) is, and how you can create your own versions so you can create your own implementations of each Node.

• 🌲 Tree Configuration: In this section, we explain what a TreeConfiguration is and all the properties that allow this package to render and use your Nodes to show a more effective appearance that simulates a node tree.

• 🤏 Draggable Configurations: In this section, we explain what a DraggableConfiguration is, and how you can use it to configure the visual appearance of your nodes during Drag and Drop events.

• 📏 Indentation Configuration: In this section, we explain what an IndentConfiguration is, and how you can use it to add indentation to your nodes in a simple yet effective way.

• 📜 Drag and Drop details: In this section, we explain what a NovDragAndDropDetails is, and what it is typically used for (and even how it is used internally to calculate certain positions during drag and drop events).

• ✍️ Nodes Gestures: In this section, we explain what a NodeDragGestures is and how you can configure it quickly and easily.

📝 Recipes

• 🗃️ Tree File: We designed an example of how you could recreate a file tree using this package quickly and easily, without too much code, but that allows you to simulate the standard behaviors of a file tree.

More recipes will be added later

🌳 Contributing

We greatly appreciate your time and effort.

To keep the project consistent and maintainable, we have a few guidelines that we ask all contributors to follow. These guidelines help ensure that everyone can understand and work with the code easier.

See Contributing for more details.