biz_xfj_cloud/lib/common/widgets/order/steelyard_container.dart

import 'dart:async';

import 'package:common_utils/common_utils.dart';
import 'package:ducafe_ui_core/ducafe_ui_core.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:forui/forui.dart';
import 'package:get/get.dart';
import 'package:flutter/material.dart';
import 'package:pj_supermarket_cloud/common/index.dart';

class SteelyardController extends GetxController {
  /// **************** start 回调函数 start ****************

  // |开始称重|的回调
  VoidCallback? onWeightStart;

  // |确定重量|的回调
  VoidCallback? onWeightSubmit;

  // |取消|的回调
  VoidCallback? onWeightCancel;

  /// **************** end 回调函数 end ****************

  static const _tag = "称重视图组件";

  final appC = Get.find<AppControl>();

  // 称重商品
  SupermarketSpuEntity? _product;

  // 重量
  RxDouble widget = RxDouble(0);

  // 回调的重量
  RxDouble callbackWidget = RxDouble(0);

  // 价格
  RxInt price = RxInt(0);

  // 添加计时器
  Timer? _noUpdateTimer;
  static const _timeoutDuration = Duration(seconds: 3);

  // 点击|开始称重|
  void weightStartCallback() {
    EasyLoading.show(
      status: '准备中...',
      maskType: EasyLoadingMaskType.black,
    );
    widget.value = 0;
    callbackWidget.value = 0;
    price.value = 0;
    _listenSteelyard();
    onWeightStart?.call();
    TtsManage.speak("开始称重");
    EasyLoading.dismiss();
  }

  // 点击|确定重量|
  void weightSubmitCallback() {
    EasyLoading.show(
      status: '确定中...',
      maskType: EasyLoadingMaskType.black,
    );
    _closeSerial();
    onWeightSubmit?.call();
    EasyLoading.dismiss();
  }

  // 点击|取消|
  void weightCancelCallback() {
    EasyLoading.show(
      status: '取消中...',
      maskType: EasyLoadingMaskType.black,
    );
    _closeSerial();
    onWeightCancel?.call();
    EasyLoading.dismiss();
  }

  // 打开称重
  bool open(SupermarketSpuEntity current) {
    final isOpen = _openSerial();
    if (_product != null) {
      Toast.error(msg: "正在称重中，请勿重复点击");
      return false;
    }
    if (!isOpen) {
      _closeStatus();
      return false;
    }
    _closeStatus();
    _product = current;
    weightStartCallback();
    return true;
  }

  void close() {
    _closeStatus();
    _closeSerial();
  }

  // 清除状态
  _closeStatus() {
    _product = null;
    widget.value = 0;
    callbackWidget.value = 0;
    price.value = 0;
    _noUpdateTimer?.cancel();
    _noUpdateTimer = null;
  }

  // 打开称串口
  bool _openSerial() {
    if (appC.srialSteelyardManage.isConnect) {
      appC.srialSteelyardManage.close();
    }
    appC.srialSteelyardManage.connect();
    if (appC.srialSteelyardManage.isConnect) {
      logger.i("|$_tag|打开称串口成功");
      return true;
    }
    logger.e("|$_tag|打开称串口失败");
    return false;
  }

  // 关闭串口
  void _closeSerial() {
    appC.srialSteelyardManage.close();
    if (appC.srialSteelyardManage.isConnect) {
      logger.e("|$_tag|关闭串口失败");
      return;
    }
    logger.i("|$_tag|关闭串口成功");
  }

  // 监听串口
  void _listenSteelyard() {
    try {
      if (_product == null) return;
      appC.srialSteelyardManage.readerClose();
      appC.srialSteelyardManage.listen((event) {
        final w = appC.srialSteelyardManage.parseWidget(event);
        if (ObjectUtil.isEmpty(w)) return;
        // 保留两位小数并向上取整
        final roundedWeight = (w! * 100).round() / 100;
        callbackWidget.value = roundedWeight;
      });
      interval(
        callbackWidget,
        (callback) {
          if (_product == null) return;
          widget.value = callbackWidget.value;
          // 获取价格
          final productPrice = _getProudctPrice(_product!);
          final p = (callbackWidget.value * productPrice).truncate().ceil();
          price.value = p;
          logger.i(
            "|$_tag|重量|${widget.value}|单价|$productPrice|总价|${price.value}|",
          );
          // 重置超时计时器
          _noUpdateTimer?.cancel();
          _noUpdateTimer = Timer(_timeoutDuration, () {
            if (widget.value > 0) {
              weightSubmitCallback();
            }
          });
        },
        time: const Duration(milliseconds: 100),
      );
    } catch (e) {
      _closeStatus();
      logger.e("|$_tag|打开并监听称串口失败error|$e|");
    }
  }

  // 获取当前商品的价格,有促销价先用促销价
  int _getProudctPrice(SupermarketSpuEntity product) {
    if (product.promotionPrice != 0) {
      return product.promotionPrice;
    }
    return product.retailPrice;
  }
}

Widget steelyardEmpty(BuildContext context) {
  final theme = FTheme.of(context);
  return <Widget>[
    <Widget>[
      FIcon(
        FAssets.icons.layers,
        size: theme.typography.xl2.fontSize,
      ),
      SizedBox(width: 10.w),
      Text(
        "请将商品放置到电子称中,点击开始称重",
        style: theme.typography.xl,
      ),
    ].toRow(mainAxisAlignment: MainAxisAlignment.center),
    SizedBox(height: 10.w),
    Text(
      "注意：请将电子称上的物品全部清空再点击开始称重",
      style: theme.typography.base,
    ),
  ].toColumn(mainAxisAlignment: MainAxisAlignment.center);
}

Widget steelyardWidget(BuildContext context) {
  final steelyardC = Get.find<SteelyardController>();
  final theme = FTheme.of(context);
  return <Widget>[
    <Widget>[
      Text("重量:", style: theme.typography.xl2),
      Obx(
        () => Text(
          "${steelyardC.widget.value}/kg",
          style: theme.typography.xl2,
        ),
      ),
    ].toRow().alignLeft().width(300.w),
    <Widget>[
      Text("价格:", style: theme.typography.xl2),
      Obx(
        () => appPrice(context, steelyardC.price.value),
      ),
    ].toRow().alignLeft().width(200.w),
  ].toColumn(mainAxisAlignment: MainAxisAlignment.center);
}

Widget steelyardContainer(BuildContext context) {
  final theme = FTheme.of(context);
  final steelyardC = Get.find<SteelyardController>();
  final textStyle = theme.typography.xl.copyWith(
    color: theme.colorScheme.secondary,
  );
  const textWidth = 220;
  return <Widget>[
    Visibility(
      visible: steelyardC.widget.value >= 0.1,
      replacement: steelyardEmpty(context),
      child: steelyardWidget(context),
    ).expanded(),
    SizedBox(height: 100.h),
    <Widget>[
      // FButton(
      //   label: Text("开始称重", style: textStyle),
      //   onPress: () => controller.weightStartCallback(),
      // ).width(textWidth.w),
      // FButton(
      //   label: Text("确定重量", style: textStyle),
      //   onPress: () => controller.weightSubmitCallback(),
      // ).width(textWidth.w),
      FButton(
        style: FButtonStyle.destructive,
        label: Text("取消", style: textStyle),
        onPress: () => steelyardC.weightCancelCallback(),
      ).width(textWidth.w),
    ]
        .toRowSpace(
          space: 50.w,
          mainAxisSize: MainAxisSize.max,
          mainAxisAlignment: MainAxisAlignment.center,
        )
        .marginOnly(top: 20.h),
  ].toColumn(mainAxisAlignment: MainAxisAlignment.center);
}