$ show Wouterdek/NodeNetwork
NodeNetwork is a .NET C# WPF library that provides a fully interactive node graph editor component, following the Model-View-ViewModel (MVVM) pattern with ReactiveUI and DynamicData for reactive data flows. The core library (NodeNetwork) offers view models and custom WPF controls for managing networks of nodes, connections, endpoints, port rendering, pan/zoom, and validation. The NodeNetworkToolkit extends this with higher-level abstractions including typed value nodes, node grouping into sub‑networks, a searchable context menu, breadcrumb navigation, and a force‑directed layout engine for automatic graph arrangement. Three example applications demonstrate practical usage: a simple arithmetic calculator, a Lua code generator, and a GLSL shader editor with a 3D OpenGL preview. The architecture is modular: the core library is decoupled from the toolkit and examples via view registration (NNViewRegistrar) and dependency injection via Splat. All viewmodels are ReactiveObjects, and views implement IViewFor<T>, allowing clean separation and testability. The repository is well‑tested with unit tests covering network validation, value propagation, and UI interactions. Despite its solid design, the codebase shows signs of technical drift: it targets .NET Framework 4.7.2 and .NET Core 3.1 (not the latest .NET), uses the deprecated OpenTK library for the shader editor, and has inconsistent NuGet reference formats (packages.config vs. project‑file references). Some view logic remains in code‑behind files, and nullable reference types are not enabled. The library is nonetheless actively maintained (last commit April 2026) and has a strong user base (962 stars). It is not a data research repository; it is a UI library with example applications.
The LLM identified 3 files worth highlighting for reuse:
Implements the Longest Common Subsequence (LCS) algorithm using dynamic programming. This is a self-contained utility class that returns the sequence of indices where elements match between two lists. It can be extracted and reused in any .NET project for diff algorithms, sequence alignment, or similarity scoring with zero dependencies on the NodeNetwork library.
Provides a force‑directed layout physics engine with configurable spring forces, repulsion, friction, and iteration control. The Engine class takes a State object (node positions, velocities) and computes forces per tick. It is fully independent of WPF and NodeNetwork types, making it directly reusable in any graph or diagramming project that requires automatic layout.
Contains pure graph algorithms including loop detection via DFS, connected node traversal (BFS/DFS with loop tolerance), subgraph extraction, and continuity checks. These methods operate on generic node/edge structures and have no UI dependencies. The algorithms can be extracted and applied to any graph-like data model outside of NodeNetwork.