digital_signature

Description:

digital signature

This library is used to capture a signature through drawing gestures.
You can use your finger, pen, or mouse on a tablet, touchscreen, etc.,
to draw your own signature in this SignaturePad widget.
The widget also allows you to save a signature as an image.
Usage #
Create a new flutter Project
Open a Flutter project, go to pubspec.yaml file and add the following dependency
digital_signature: ^0.0.1
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Flutter pub get
Inside lib create a new dart file for digital signature
Create a digitalSignature class
Inside this class, we need to define the controller
Initialise a controller. It will contains signature points, stroke width and pen color.
It will allow you to interact with the widget
final SignatureController controller = SignatureController(penStrokeWidth: size2, penColor: Colors.white);
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PenStrokeWidth – initialize the pen width
PenColor – initialize the pencolor for digital signature
To convert signature to png bytes by using unit8list
late final Uint8List? signature;
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Define Digital signature pad
Center(
child: SizedBox(
height: size300,
width: size350,
child: Signature(
height: size300,
width: size350,
controller: controller,
backgroundColor: Colors.grey,
),
),
),
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Export digital signature into png bytes
Future<Uint8List?> exportSignature() async {
final exportController = SignatureController(
penStrokeWidth: size2,
exportBackgroundColor: Colors.white,
penColor: Colors.black,
points: controller.points,
);

final signature = exportController.toPngBytes();

//clean up the memory
exportController.dispose();

return signature;
}
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View digital signature In Image view
signature = await exportSignature();

signature!=null?Center(
child: Image.memory(signature!)
):Container()
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