app-zj/lib/page/print/print_page.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:lszlgl/base/base_lifecycle_state.dart';
import 'package:lszlgl/page/print/connect_print_page.dart';
import 'package:signature/signature.dart';
import 'package:lszlgl/widget/button.dart';

import '../../service/print_service.dart';
import '../home/home_page.dart';

class PrintPageArgs {
  /// 签名数量
  int count;

  PrintPageArgs({this.count = 1});

  @override
  String toString() {
    return {'count': count}.toString();
  }
}

/// 电子签名
class PrintPage extends StatefulWidget {
  final PrintPageArgs args;

  const PrintPage({
    super.key,
    required this.args,
  });

  @override
  State<PrintPage> createState() => _PrintPageState();
}

class _PrintPageState extends BaseLifecycleState<PrintPage> {
  late int count;
  late List<SignatureController> ctrlList;
  late PageController pageCtrl;

  final previousEnable = false.notifier<bool>();
  final nextEnable = false.notifier<bool>();
  final submitEnable = false.notifier<bool>();

  late List<ServiceModel> serviceList;

  @override
  void initState() {
    super.initState();
    serviceList = [
      ServiceModel(name: '连接', icon: imgHomeListPzjc, onTap: () => startConnect()),
      ServiceModel(name: '打印', icon: imgHomeListZcjy, onTap: () => startPrint()),
    ];
  }

  Future<void> startConnect() async {

    var args = ConnectPrintPageArgs(count: 0);
    await MyRouter.startConnectPrint(args: args);
  }

  /// 去打印
  Future<void> startPrint() async {
    // await PrintService.startBluetoothPair(deviceInfo);
  }

  @override
  void onInit() {

    // 创建签名列表
    count = widget.args.count;
    ctrlList = List.generate(
      count,
          (index) => SignatureController(
        penStrokeWidth: 6,
        penColor: Colors.black,
        strokeJoin: StrokeJoin.round,
        strokeCap: StrokeCap.round,
      ),
    ).toList();
    pageCtrl = PageController();
    if (count == 1) {
      submitEnable.value = true;
    } else {
      nextEnable.value = true;
    }
  }

  @override
  void onDestroy() {
    SystemChrome.setPreferredOrientations([
      DeviceOrientation.portraitUp,
      DeviceOrientation.portraitDown,
    ]);
    for (var ctrl in ctrlList) {
      ctrl.dispose();
    }
  }

  @override
  Widget build(BuildContext context) {
    return myScaffold(
      child: Column(
        children: [
          myAppBar(title: '打印二维码'),
          const SizedBox(height: 18),
          ...List.generate(
            serviceList.length,
                (index) => buildServiceItem(serviceList[index]),
          ).toList(),
        ],
      ),
    );
  }

  Widget buildServiceItem(ServiceModel service) {
    return GestureDetector(
      onTap: service.onTap,
      child: Container(
        margin: const EdgeInsets.only(left: 12, right: 12, bottom: 22),
        padding: const EdgeInsets.symmetric(vertical: 20, horizontal: 40),
        clipBehavior: Clip.hardEdge,
        decoration: BoxDecoration(
          borderRadius: const BorderRadius.all(Radius.circular(12)),
          boxShadow: [BoxShadow(color: Colors.black.withOpacity(0.1), offset: const Offset(0, 5), blurRadius: 4)],
          image: const DecorationImage(image: AssetImage(imgHomeListBg), fit: BoxFit.fill),
        ),
        child: Row(
          children: [
            Image.asset(service.icon, height: 64),
            const SizedBox(width: 12),
            Expanded(
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: [
                  Text(
                    service.name,
                    textAlign: TextAlign.center,
                    style: const TextStyle(color: Color(0xFF333333), fontSize: 20, fontWeight: FontWeight.w500),
                  ),
                  service.nameEn != null
                      ? Padding(
                    padding: const EdgeInsets.only(top: 4),
                    child: Text(
                      service.nameEn!,
                      textAlign: TextAlign.center,
                      style: const TextStyle(color: Color(0xFF333333), fontSize: 12, fontWeight: FontWeight.w500),
                    ),
                  )
                      : const SizedBox.shrink(),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }
}