128 lines
3.1 KiB
C#
128 lines
3.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.Runtime.Serialization;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using LiveCharts;
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using LiveCharts.Configurations;
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using Util;
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namespace DoctorApp.Models
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{
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class Chart : ObservableObject,INotifyPropertyChanged
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{
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private double _axisMax;
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private double _axisMin;
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private double _trend;
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public event PropertyChangedEventHandler PropertyChanged;
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public ChartValues<MeasureModel> ChartValues { get; set; }
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public Func<double, string> DateTimeFormatter { get; set; }
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public PatientInfo PatientInfo { get; set; }
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public double AxisStep { get; set; }
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public double AxisUnit { get; set; }
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public double AxisMax
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{
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get { return _axisMax; }
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set
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{
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_axisMax = value;
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OnPropertyChanged("AxisMax");
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}
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}
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public double AxisMin
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{
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get { return _axisMin; }
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set
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{
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_axisMin = value;
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OnPropertyChanged("AxisMin");
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}
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}
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public bool IsReading { get; set; }
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public Chart(PatientInfo patientInfo)
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{
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var mapper = Mappers.Xy<MeasureModel>()
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.X(model => model.DateTime.Ticks)
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.Y(model => model.Value);
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Charting.For<MeasureModel>(mapper);
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ChartValues = new ChartValues<MeasureModel>();
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DateTimeFormatter = value => new DateTime((long)value).ToString("mm:ss");
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AxisStep = TimeSpan.FromSeconds(1).Ticks;
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AxisUnit = TimeSpan.TicksPerSecond;
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SetAxisLimits(DateTime.Now);
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IsReading = true;
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ChartValues.Add(new MeasureModel
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{
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DateTime = DateTime.Now,
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Value = 8
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});
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}
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private void SetAxisLimits(DateTime now)
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{
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AxisMax = now.Ticks + TimeSpan.FromSeconds(1).Ticks; // lets force the axis to be 1 second ahead
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AxisMin = now.Ticks - TimeSpan.FromSeconds(8).Ticks; // and 8 seconds behind
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}
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protected virtual void OnPropertyChanged(string propertyName = null)
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{
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if (PropertyChanged != null)
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PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
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}
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public void NewValue(double value)
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{
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var now = DateTime.Now;
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_trend = value;
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ChartValues.Add(new MeasureModel
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{
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DateTime = now,
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Value = _trend
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});
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SetAxisLimits(now);
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if (ChartValues.Count > 150) ChartValues.RemoveAt(0);
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}
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public void Clear()
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{
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Debug.WriteLine("clear");
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ChartValues.Clear();
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}
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}
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public class MeasureModel
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{
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public DateTime DateTime { get; set; }
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public double Value { get; set; }
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}
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}
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