Flutter widget to allow users to sign with finger and export the result as image.
This is a very simple widget that allow drawing by finger on a widget and be able to get the image back.
For very basic usage, please check the example file here
Widget build(BuildContext context) {
// Controller is used
final controller = SignatureController(
backgroundPainter: null, // Additional custom painter to draw stuff like watermark
);
return Column(children: [
Signature(
controller: controller
color: Colors.black, // Color of the drawing path
strokeWidth: 5.0, // width of the drawing path
onSign: null, // Callback called on user pan drawing
),
ElevatedButton(
onPressed: () => controller.getData().then((image) => /* process image */),
child: Text("Save")),
ElevatedButton(
onPressed: () => controller.clear(),
child: Text("Clear"))
]);
}The controller exposes the following methods:
clear: allow you to clear the area to start again
getData: allow you to retrieve the image
hasPoints: to know if user has sign or not
points: to retrieve the list of points of the signature