BPASmartClient/BPASmartClient.Academy/ViewModel/DeviceChart50LViewModel.cs

using BPASmartClient.Academy._50L;
using BPASmartClient.Academy.Model;
using LiveCharts;
using LiveCharts.Configurations;
using LiveCharts.Wpf;
using OxyPlot.Axes;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BPASmartClient.Academy.ViewModel
{
    public class DeviceChart50LViewModel : NotifyBase
    {
        private volatile static DeviceChart50LViewModel _Instance;
        public static DeviceChart50LViewModel GetInstance => _Instance ?? (_Instance = new DeviceChart50LViewModel());
        private DeviceChart50LViewModel()
        {
            DataFeedback = new DataFeedBack_50();
            var mapper = Mappers.Xy<DataValue>()
              .X(model => model.DateTime.Ticks)
              .Y(model => model.Value);
            Charting.For<DataValue>(mapper);
            DataFeedback = SqliteOperate.GetInstance.DataFeedBacks;
        }


        private DataFeedBack_50 dataFeedback;
        public DataFeedBack_50 DataFeedback { get { return dataFeedback; } set { dataFeedback = value; OnPropertyChanged(); } }
        public Func<double, string> DateTimeFormatter { get; set; } = value => value > 0 ? new DateTime((long)value).ToString("HH:mm:ss") : new DateTime((long)DateTime.Now.Ticks).ToString("HH:mm:ss");

        public Func<double, string> doubleFormatter { get; set; } = value => value.ToString("F2");



        public double AxisStep { get; set; } = TimeSpan.FromSeconds(2).Ticks;
        public double AxisUnit { get; set; } = TimeSpan.TicksPerSecond;
    }
}