zoomLevel property Null safety

double zoomLevel

Zoom level of a document in the SfPdfViewer.

Zoom level value can be set between 1.0 to 3.0. The maximum allowed zoom level is 3.0 and if any value is set beyond that, then it will be restricted to 3.0.

Defaults to 1.0

This example demonstrates how to set the zoom level in the SfPdfViewer.

class MyAppState extends State<MyApp>{
 late PdfViewerController _pdfViewerController;

 @override
 void initState(){
   _pdfViewerController = PdfViewerController();
   super.initState();
 }

 @override
 Widget build(BuildContext context) {
   return MaterialApp(
     home: Scaffold(
       appBar: AppBar(
          title: Text('Syncfusion Flutter PdfViewer'),
          actions: <Widget>[
             IconButton(
                icon: Icon(
                   Icons.zoom_in,
                   color: Colors.white,
                ),
                onPressed: () {
                   _pdfViewerController.zoomLevel = 2;
                },
             ),
          ],
       ),
       body: SfPdfViewer.asset(
         'assets/flutter-succinctly.pdf',
         controller: _pdfViewerController,
       ),
     ),
   );
 }
}

Implementation

double get zoomLevel => _zoomLevel;
void zoomLevel=(double newValue)

Sets the zoom level

Implementation

set zoomLevel(double newValue) {
  if (_zoomLevel == newValue) {
    return;
  }
  _zoomLevel = newValue;
  notifyPropertyChangedListeners(property: 'zoomLevel');
}