VitalApp/lib/pages/medical_checkup_station/registration/controller.dart

import 'dart:ui';
import 'package:fis_jsonrpc/rpc.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_printer_plus/flutter_printer_plus.dart'
    if (dart.library.html) "package:vitalapp/pages/medical_checkup_station/usb_print/web/flutter_printer_plus.dart";
import 'package:get/get.dart';
import 'package:vitalapp/managers/interfaces/appointment.dart';
import 'package:vitalapp/managers/interfaces/registration.dart';
import 'package:vitalapp/pages/medical_checkup_station/registration/controller/form.dart';
import 'package:vitalapp/pages/medical_checkup_station/registration/controller/list.dart';
import 'package:vitalapp/pages/medical_checkup_station/registration/state/list.dart';
import 'package:vitalapp/pages/medical_checkup_station/usb_print/module/printer_info.dart';
import 'package:barcode_image/barcode_image.dart';
import 'package:flutter_svg/flutter_svg.dart';

/// 登记控制器
class RegistrationController extends GetxController {
  late final RegistrationFormController formController;
  late final RegistrationListController listController;
  final appointmentManager = Get.find<IAppointmentManager>();
  final registrationManager = Get.find<IRegistrationManager>();
  final state = ListState();

  RegistrationController() {
    listController = RegistrationListController(this);
    formController = RegistrationFormController(this);
  }

  /// 登记
  ResidentModel resident = ResidentModel(
    idNumber: '',
  );

  /// 手动填写的病人名字
  PatientDTO? patientInfo = PatientDTO();

  /// 预约列表
  List<ResidentModel> residentList = [];

  /// 预约列表的总数
  int appointmentModelListLength = 0;

  /// 表格loading
  bool tableLoading = true;

  /// 当前表格页数
  int currPageIndex = 1;
  PrinterInfo? printInfo;

  List<Uint8List> barCodeList = [];

//查询本地USB打印机列表
  Future<List<PrinterInfo>> queryLocalUSBPrinter() {
    return FlutterPrinterFinder.queryUsbPrinter().then(
      (value) => value.map((e) => PrinterInfo.fromUsbDevice(e)).toList(),
    );
  }

  _initData() async {
    var now = DateTime.now();
    listController.state.startTime = new DateTime(now.year, now.month, now.day);
    listController.state.endTime = listController.state.startTime!
        .add(Duration(hours: 23, minutes: 59, seconds: 59));
    await listController.getRegisterInfoPage();
    if (!kIsWeb) {
      List<PrinterInfo>? printerInfoList = await queryLocalUSBPrinter();
      if (printerInfoList.length == 0) {
        return;
      }
      printInfo = printerInfoList.first;
    }
  }

  Future<void> getExamLabelsByExamNoAsync(ResidentModel rowData) async {
    var labels = await registrationManager.getExamLabelsByExamNoAsync(
        physicalExamNumber: rowData.physicalExamNumber!);
    barCodeList.clear();
    for (var element in labels.eaxmLabels!) {
      var barCodeData = await drawRedRect(element, rowData);
      if (barCodeData.isNotEmpty) {
        barCodeList.add(barCodeData);
      }
    }
  }

  Future<Uint8List> drawRedRect(
      HealthExamLabelDTO labelDto, ResidentModel resident) async {
    const size = Size(360, 240);
    final svg = Barcode.code128().toSvg(labelDto.uniquedCode!, height: 80);
    final PictureInfo pictureInfo =
        await vg.loadPicture(SvgStringLoader(svg), null);
    var a = await _capturePainterToImage(
        MyPainter(pictureInfo, labelDto, resident),
        BgPainter(pictureInfo),
        size);
    return a!;
  }

  /// 将CustomPainter绘制的内容转换为图片
  Future<Uint8List?> _capturePainterToImage(
      CustomPainter painter, CustomPainter bgPainter, Size size) async {
    final bounds = Offset.zero & size;
    // final bounds2 = Offset.zero & Size(size.width - 20, size.height - 20);
    final picture = PictureRecorder();
    final pictureCanvas = Canvas(picture);
    // 给Canvas设置绘制范围
    pictureCanvas.clipRect(bounds);
    painter.paint(pictureCanvas, size);
    // 在Canvas上进行绘制
    bgPainter.paint(pictureCanvas, size);

    // 结束绘制
    final recordedPicture = picture.endRecording();
    final image =
        await recordedPicture.toImage(size.width.toInt(), size.height.toInt());

    // 转换为字节数组
    final byteData = await image.toByteData(format: ImageByteFormat.png);
    final bytes = byteData?.buffer.asUint8List();

    return bytes;
  }

  void onTap() {}

  @override
  void onReady() {
    _initData();
    super.onReady();
  }

  // void on

  @override
  void onClose() {}
}

class MyPainter extends CustomPainter {
  PictureInfo pictureInfo;
  HealthExamLabelDTO labelDto;
  ResidentModel resident;
  MyPainter(this.pictureInfo, this.labelDto, this.resident);
  @override
  void paint(Canvas canvas, Size size) {
    Paint backgroundPaint = Paint()..color = Colors.white;
    canvas.drawRect(
        Rect.fromLTWH(0, 0, size.width, size.height), backgroundPaint);
    canvas.drawLine(
        Offset(0, 85), Offset(360, 85), Paint()..color = Colors.black);

    // Simulate drawing the content
    TextSpan titleSpan = TextSpan(
      text: '${labelDto.title ?? ''}',
      style: TextStyle(fontSize: 30, height: 1, color: Colors.black),
    );
    TextPainter titleTp = TextPainter(
      text: titleSpan,
      textAlign: TextAlign.left,
      textDirection: TextDirection.ltr,
    );
    titleTp.layout();
    titleTp.paint(canvas, Offset(28, 8));

    TextSpan subTitleSpanName = TextSpan(
      text: '${resident.name} ',
      style: TextStyle(fontSize: 20, height: 1, color: Colors.black),
    );
    TextPainter subTitleTp1 = TextPainter(
      text: subTitleSpanName,
      textAlign: TextAlign.left,
      textDirection: TextDirection.ltr,
    );
    subTitleTp1.layout();
    subTitleTp1.paint(canvas, Offset(28, 48));

    TextSpan subTitleSpanAge = TextSpan(
      text: '${resident.age} 岁',
      style: TextStyle(fontSize: 20, height: 1, color: Colors.black),
    );
    TextPainter subTitleTpAge = TextPainter(
      text: subTitleSpanAge,
      textAlign: TextAlign.left,
      textDirection: TextDirection.ltr,
    );
    subTitleTpAge.layout();
    subTitleTpAge.paint(canvas, Offset(168, 48));
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) {
    return false;
  }
}

class BgPainter extends CustomPainter {
  PictureInfo pictureInfo;
  BgPainter(this.pictureInfo);
  @override
  void paint(Canvas canvas, Size size) {
    canvas.translate(30, 100);
    canvas.scale(1.5, 1.5);
    canvas.drawPicture(pictureInfo.picture);
    canvas.restore(); // 恢复之前保存的绘制状态
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) {
    return false;
  }
}