annotation-collection.md

layout	title	description	platform	control	documentation
post	Annotation Collection in Flutter PDF Viewer widget | Syncfusion	Learn here all about annotation collection in the Syncfusion Flutter PDF Viewer (SfPdfViewer) widget and more.	Flutter	SfPdfViewer	ug

Annotation Collection in Flutter PDF Viewer widget (Syncfusion)

The annotations in the PDF document can be accessed by the getAnnotations method of the PdfViewerController. The return value of the function will have Annotation collection as soon as the document is loaded in the PDF viewer. The following code example shows how the annotation collection can be accessed.

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final PdfViewerController _pdfViewerController = PdfViewerController();

@override Widget build(BuildContext context) { return SfPdfViewer.asset( 'assets/annotations.pdf', controller: _pdfViewerController, onDocumentLoaded: (PdfDocumentLoadedDetails details) { final List annotations = _pdfViewerController.getAnnotations(); if (annotations.isNotEmpty) { // Gets the first annotation from the collection. final Annotation annotation = annotations.first; if (annotation is HighlightAnnotation) { final Color color = annotation.color; final double opacity = annotation.opacity; } } }, ); }

{% endhighlight %} {% endtabs %}