How to Add Annotation Constraints in React Diagram?

In this article, learn how to add annotation constraints for dynamically added annotations during the TextEdit event in the React Diagram component.

When you double-click on a node or connector annotation, the edit box will open. After editing the annotation content, the TextEdit event will be triggered. In this event, you can access the edited node or connector object. Using this object, you can add annotation constraints for the corresponding node or connector.

Please refer to the code below to handle changes inside the TextEdit event:

const textEdit = (args) => {
     let element = args.element;
     if (element.annotations.length > 0) {
       element.annotations[0].constraints =
         AnnotationConstraints.Interaction | AnnotationConstraints.Drag;
     }
   
 }; 

In this code:

• After editing, we access the edited node or connector through args.element.
• If the element has annotations, we apply the interaction and drag constraints to the first annotation.

Refer to the working sample for additional details and implementation: Sample

Conclusion

We hope you enjoyed learning how to add annotation constraints in React Diagram.

You can refer to our React Diagram feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our React Diagram example to understand how to create and manipulate data.

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