pile_nav_new/lib/pages/real/line_chart.dart

// ignore_for_file: must_be_immutable

import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:intl/intl.dart';

import 'component/chart.dart';
import 'process.dart';
import 'realController.dart';



// 深度
class RealChart extends StatelessWidget {
  RealChart({super.key});
  ChartData chartData = ChartData(
    [],
  );
  final RealController realController = Get.put(RealController());
  List<ProcessEntity> processList = [];
  format(double value, [int fix = 2]) {
    return double.parse(value.toStringAsFixed(fix));
  }

  List<ProcessEntity> cache = [];
  @override
  Widget build(BuildContext context) {
    // 显示长度
    int showlength = 30;
    ever(realController.depth, (newValue) {
      ProcessEntity process = ProcessEntity(
        recvTime: DateFormat('yyyy-MM-dd HH:mm:ss').format(DateTime.now()),
        pileId: realController.pileId.value,
        utc: 0,
        tid: 100,
        toatalFlow1: format(realController.totalFlow1.value),
        toatalFlow2: format(realController.totalFlow2.value),
        subtotalFlow1: format(realController.subtotalFlow1.value),
        subtotalFlow2: format(realController.subtotalFlow2.value),
        depth: format(realController.depth.value),
      );

      processList.add(process);

      if (realController.sliderTime != null) {
        if (DateTime.now().difference(realController.sliderTime!).inSeconds >
            10) {
          realController.updateProcessList(processList);
          realController.updateSlider(processList.length.toDouble(), false);
        } else {
          return;
        }
      } else {
        realController.updateProcessList(processList);
        if (realController.startIndex.value != processList.length) {
          realController.updateSlider(processList.length.toDouble(), false);
        }
      }
    });
    ever(realController.pileId, (newValue) {
      ProcessEntity process = ProcessEntity(
        recvTime: DateFormat('yyyy-MM-dd HH:mm:ss').format(DateTime.now()),
        pileId: realController.pileId.value,
        utc: 0,
        tid: 100,
        toatalFlow1: format(realController.totalFlow1.value),
        toatalFlow2: format(realController.totalFlow2.value),
        subtotalFlow1: format(realController.subtotalFlow1.value),
        subtotalFlow2: format(realController.subtotalFlow2.value),
        depth: format(realController.depth.value),
      );
      processList.length = 0;
      processList.add(process);
      realController.updateProcessList(processList.toList());
      realController.startIndex.value = 0;
    });

    List<Widget> chartTitleWidget = chartData.chartTitleWeidget();
    Widget chartWidget(List<ProcessEntity> processList) {
      int startIndex = 0;

      if ((realController.startIndex.value + showlength) < processList.length &&
          realController.startIndex.value != 0) {
        startIndex = realController.startIndex.value;
      } else {
        startIndex = ((processList.length - showlength < 0)
            ? 0
            : (processList.length - showlength));
      }
      int endIndex = startIndex + showlength > processList.length
          ? processList.length
          : startIndex + showlength;
      ChartData chartData = ChartData(
        processList.sublist(startIndex, endIndex),
      );
      return LineChart(chartData.lineChart);
    }

    return Column(
      children: [
        Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: chartTitleWidget,
        ),
        Expanded(
            flex: 1,
            child: Obx(
                () => SizedBox(child: chartWidget(realController.processList))))
      ],
    );
  }
}