diagrammodeller

Diagrammodeller is a software library designed to facilitate the creation, editing, rendering, and interchange of diagrams within applications. It provides a programmable data model for diagrams, along with rendering and interaction layers that can be embedded into web or desktop apps. The goal is to offer a flexible foundation for building diagram editors and modeling tools.

The core data model represents a diagram as a graph of nodes and edges. Nodes correspond to diagram elements such as shapes, ports, labels, and groups, each carrying type, position, size, and property data. Edges model connections between nodes and can carry bendpoints, labels, and styling. The model is designed to be extensible to accommodate different diagram languages such as flowcharts, UML, BPMN, or custom notations.

Rendering and interaction typically rely on SVG or Canvas, and support features such as zoom and pan, selection, drag-and-drop, and path routing. An event system allows applications to respond to the creation, modification, or deletion of diagram elements. The library emphasizes a clean separation between model and presentation to enable flexible customization.

Architecture and extensibility describe a modular design with a core model, rendering engine, and interaction handlers. A plugin system enables new diagram types, layouts, or import/export formats. The library exposes a stable API for creating elements, updating properties, or subscribing to events, making it suitable for embedding in diverse environments.

Persistence and interchange facilitate storage and transmission of diagrams as JSON and, where applicable, through import/export formats. Diagrammodeller is used in various web applications to provide embeddable diagram editing capabilities and can integrate with data sources and back-end services. See also: graph theory, diagramming libraries, UML, BPMN.