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122 lines
4.2 KiB
Dart
122 lines
4.2 KiB
Dart
import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:signature/signature.dart';
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import 'package:test_sa/views/app_style/colors.dart';
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import 'package:test_sa/views/app_style/sizing.dart';
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import 'package:test_sa/views/widgets/loaders/image_loader.dart';
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class ESignature extends StatefulWidget {
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final String oldSignature;
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final Uint8List newSignature;
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final Function(Uint8List) onSaved;
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final Function(Uint8List) onChange;
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const ESignature({Key key, this.oldSignature, this.onSaved, this.onChange, this.newSignature}) : super(key: key);
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@override
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State<ESignature> createState() => _ESignatureState();
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}
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class _ESignatureState extends State<ESignature> {
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// Initialise a controller. It will contains signature points, stroke width and pen color.
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final SignatureController _controller = SignatureController(
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penStrokeWidth: 2,
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penColor: Colors.black,
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exportBackgroundColor: Colors.white,
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);
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Uint8List signature;
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bool _unpaint = false;
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@override
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void initState() {
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if (widget.newSignature != null) {
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signature = widget.newSignature;
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}
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// TODO: implement initState
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super.initState();
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}
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@override
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void dispose() {
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_controller.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return Column(
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children: [
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if (widget.oldSignature != null || signature != null)
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Container(
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width: MediaQuery.of(context).size.width,
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padding: const EdgeInsets.only(bottom: 8),
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height: 90 * AppStyle.getScaleFactor(context),
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child: signature != null ? Image.memory(signature) : ImageLoader(boxFit: BoxFit.contain, url: widget.oldSignature)),
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FormField<String>(onSaved: (_) async {
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widget.onSaved(signature);
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}, builder: (FormFieldState<String> state) {
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return Column(
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children: [
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Container(
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width: MediaQuery.of(context).size.width,
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padding: const EdgeInsets.symmetric(horizontal: 16),
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decoration: BoxDecoration(
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color: Colors.white,
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border: Border.all(color: AColors.black),
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borderRadius: BorderRadius.circular(AppStyle.borderRadius * AppStyle.getScaleFactor(context)),
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boxShadow: const [AppStyle.boxShadow]),
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child: AbsorbPointer(
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absorbing: _unpaint,
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child: Signature(
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controller: _controller,
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height: 160 * AppStyle.getScaleFactor(context),
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backgroundColor: Colors.transparent,
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),
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),
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),
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Row(
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children: [
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IconButton(
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onPressed: () {
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_controller.clear();
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},
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icon: const Icon(Icons.clear)),
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IconButton(
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onPressed: () {
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_controller.undo();
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},
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icon: const Icon(Icons.undo)),
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IconButton(
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onPressed: () {
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_controller.redo();
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},
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icon: const Icon(Icons.redo)),
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IconButton(
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onPressed: () {
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_unpaint = !_unpaint;
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setState(() {});
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},
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icon: Icon(
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_unpaint ? Icons.draw : Icons.ac_unit,
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color: _unpaint ? AColors.orange : null,
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)),
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const Spacer(),
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IconButton(
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onPressed: () async {
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signature = await _controller.toPngBytes();
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if (widget.onChange != null) {
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widget.onChange(signature);
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}
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setState(() {});
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},
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icon: const Icon(Icons.check)),
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],
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)
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],
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);
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}),
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],
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);
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}
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}
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