A Windows Forms application for visualizing hierarchical graph structures with a custom canvas renderer.

This project has been converted from a Unity Editor extension to a standalone Windows Forms application. It provides an interactive graph visualization tool with support for:

• Hierarchical Node Structures: Display parent-child relationships in a tree layout
• Interactive Canvas: Pan and zoom with mouse controls
• Node Selection: Click nodes to view detailed properties
• Custom Rendering: High-performance double-buffered rendering with GDI+

• Color-coded nodes based on content type
• Connection lines showing parent-child relationships
• Grid background for spatial reference
• Node selection highlighting
• Weight indicators on nodes
• Active/inactive node states

• Mouse Wheel: Zoom in/out
• Middle Mouse Button: Pan the canvas
• Left Click: Select nodes
• Ctrl+N: Create new graph
• Ctrl+R: Reset view

• Main Canvas: Graph visualization area
• Properties Panel: Detailed node information display
• Menu Bar: File and View operations
• Status Bar: User guidance and feedback

• Graph.cs: Abstract base class for graph data structures
• Node.cs: Node representation with hierarchy support
• GraphCanvas.cs: Custom Windows Forms control for rendering graphs
• GraphVisualizerForm.cs: Main application window

• IGraphLayout.cs: Interface for layout algorithms
• SimpleTreeLayout: Basic tree layout implementation
• Vertex: Position and dimension data for nodes

• IGraphRenderer.cs: Abstraction for graph rendering
• GraphSettings: Configuration for visual appearance

• .NET 8.0 SDK or later
• Windows OS (Windows Forms dependency)

dotnet build

dotnet run

The application includes a sample graph that loads automatically on startup. The sample demonstrates:

• Root node with multiple children
• Multi-level hierarchy (grandchildren)
• Different node weights
• Active and inactive nodes

Extend the Graph base class and implement:

protected abstract IEnumerable<Node> GetChildren(Node node);
protected abstract void Populate();

Implement IGraphLayout interface:

public interface IGraphLayout
{
    List<Vertex> vertices { get; }
    void CalculateLayout(Graph graph);
}

• UnityEngine
• UnityEditor
• Unity PlayableGraph APIs

• Unity Editor Window → Windows Forms Form
• Unity GUI → GDI+ Graphics
• UnityEngine.Color → System.Drawing.Color
• Unity Rect → System.Drawing.Rectangle
• Unity Vector2/Vector3 → System.Drawing.PointF

• Standalone executable (no Unity required)
• Enhanced mouse controls (pan/zoom)
• PropertyGrid integration for node inspection
• Modern dark theme UI

• No LiteGraph external library (using custom renderer instead)
• Some nullability warnings (benign, related to nullable reference types)
• Windows-only (Windows Forms dependency)

Potential improvements:

• Save/Load graph data
• Export to image formats
• Custom node styling
• Animation support
• Multi-graph comparison
• Search and filter capabilities

Same as original project.

Contributions welcome! Areas for improvement:

• Additional layout algorithms
• Performance optimizations
• Cross-platform support (consider Avalonia UI)
• More sample graphs