vyuh_diagram_core 2.17.0

Transactions, editor state, and history for Vyuh Diagram.

vyuh_diagram_core

Create, connect and edit diagrams in pure Dart. Use the same controller in Flutter apps, servers and agents.

Install

dart pub add vyuh_diagram_core

Create and connect

import 'package:vyuh_diagram_core/vyuh_diagram_core.dart';

final controller = DiagramController();
final start = controller.createShape(
  Shapes.rectangle, at: DiagramPoint.zero, text: 'Start',
);
final finish = controller.createShape(
  Shapes.rectangle, at: const DiagramPoint(240, 0), text: 'Finish',
);
controller.connect(start, finish);
controller.undo();
controller.redo();
// Dispose the controller when its owner closes.

Direct calls return an ID or complete the edit; a denied edit throws. Use controller.edits.createShape(...) when you want to inspect an EditResult instead. Both use the same rules and undo history.

Core includes basic shapes, plain text, straight connectors, arrowheads, freehand drawing, grid snapping, selection, grouping and undo/redo. The grid is installed but hidden; enable it with GridExtension(visible: true, snap: true) in your configuration.

Add another controller to controller.diagram for a person or agent working on the same document. Install extensions once through DiagramConfiguration.

See Hello world, controller methods, configuration and agents.

License

Licensed under the Apache License, Version 2.0. Third-party materials retain their own licenses and notices.