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The Flutter Signature Pad widget allows you to capture smooth and more realistic signatures through drawn gestures and save it as an image.

example/lib/main.dart

import 'dart:ui' as ui;
import 'package:flutter/material.dart';
import 'package:syncfusion_flutter_signaturepad/signaturepad.dart';

void main() {
  return runApp(SignaturePadApp());
}

///Renders the SignaturePad widget.
class SignaturePadApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'SfSignaturePad Demo',
      home: _MyHomePage(),
    );
  }
}

class _MyHomePage extends StatefulWidget {
  _MyHomePage({Key? key}) : super(key: key);

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<_MyHomePage> {
  final GlobalKey<SfSignaturePadState> signatureGlobalKey = GlobalKey();

  @override
  void initState() {
    super.initState();
  }

  void _handleClearButtonPressed() {
    signatureGlobalKey.currentState!.clear();
  }

  void _handleSaveButtonPressed() async {
    final data =
        await signatureGlobalKey.currentState!.toImage(pixelRatio: 3.0);
    final bytes = await data.toByteData(format: ui.ImageByteFormat.png);
    await Navigator.of(context).push(
      MaterialPageRoute(
        builder: (BuildContext context) {
          return Scaffold(
            appBar: AppBar(),
            body: Center(
              child: Container(
                color: Colors.grey[300],
                child: Image.memory(bytes!.buffer.asUint8List()),
              ),
            ),
          );
        },
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Column(
            children: [
          Padding(
              padding: EdgeInsets.all(10),
              child: Container(
                  child: SfSignaturePad(
                      key: signatureGlobalKey,
                      backgroundColor: Colors.white,
                      strokeColor: Colors.black,
                      minimumStrokeWidth: 1.0,
                      maximumStrokeWidth: 4.0),
                  decoration:
                      BoxDecoration(border: Border.all(color: Colors.grey)))),
          SizedBox(height: 10),
          Row(children: <Widget>[
            TextButton(
              child: Text('ToImage'),
              onPressed: _handleSaveButtonPressed,
            ),
            TextButton(
              child: Text('Clear'),
              onPressed: _handleClearButtonPressed,
            )
          ], mainAxisAlignment: MainAxisAlignment.spaceEvenly)
        ],
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center));
  }
}
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likes
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pub points
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popularity

Publisher

verified publisher iconsyncfusion.com

The Flutter Signature Pad widget allows you to capture smooth and more realistic signatures through drawn gestures and save it as an image.

Repository (GitHub)

Documentation

API reference

License

Icon for licenses.unknown (LICENSE)

Dependencies

flutter, syncfusion_flutter_core

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