v1.0 Now Available for Qt 6

Build Powerful Node Editors
with Speed & Flexibility

A high-performance, open-source library for creating node-based graphs and dataflow programming in Qt/QML. Designed for stability, styled for professionals.

Get NodeLink View Documentation

Engineered for Qt Developers

Everything you need to build complex graph visualization tools.

🛠

Modular Architecture

Use or override every component, including ports, connections, context menus.

🎨

Fully Customizable UI

Fully customizable node appearance using QML. Create bezier curves, straight lines, or custom sockets with ease.

⚡

High Performance

Optimized for large graphs. Handles hundreds of nodes with smooth zooming, panning, and real-time dragging.

💾

Serialization

Built-in support for saving and loading graph states to JSON, making project file management effortless.

↩️

Undo / Redo Stack

A robust command stack is included out of the box, allowing users to traverse their edit history fearlessly.

⚙️

Qt/C++ Integration

Connect business logic, data models, and C++ backends to nodes.

Examples

Practical use-cases from the NodeLink framework based on the official documentation.

Calculator
Calculator
A visual node-based calculator with NodeLink. Connect nodes to perform mathematical operations, showcasing how to build custom node-based applications.
View Example →
Chatbot
Chatbot
A visual rule-based chatbot with Regex-driven logic. Define conversation patterns by connecting nodes—making the bot’s behavior easy to design, adjust, and extend without hardcoded rules.
View Example →
Logic Circuit
Logic Circuit
A visual digital logic simulator using NodeLink. Build and connect gates, toggle inputs, and watch real-time signal flow—ideal for learning and testing circuits.
View Example →
VisionLink
VisionLink
A visual image processing app using NodeLink. Connect nodes to load, process, and display images, with real-time interaction and C++/QML integration—ideal for building custom, node-based image pipelines.
View Example →
Simple NodeLink
Simple NodeLink
The minimal starter example. Learn to create and connect nodes, and use basic features like save/load, copy/paste, and cloning—perfect for beginners.
View Example →
Performance Analyzer
Performance Analyzer
A benchmarking tool for NodeLink. Create many nodes and links, measure performance, and test scalability under load.
View Example →

Integrate in Minutes

NodeLink is designed to drop into your existing Qt project via CMake. It exposes a clean API to both C++ and QML.

  • Simple CMake `add_subdirectory` integration
  • Automatic QML Type Registration
  • Extensible Node Models

Installation:

git clone https://github.com/Roniasoft/NodeLink.git
main.qml
main.cpp
import QtQuick
import NodeLink

Item {
    id: root
    property  Scene  scene Scene {}

    NodeView {
        id: graphView
        anchors.fill: parent
        scene: root.scene
        Component.onCompleted: {
            console.log("Graph Ready")
        }
    }
}