avalonia、WPF使用ScottPlot动态显示ECG心电图

avalonia、WPF使用ScottPlot动态显示ECG心电图

实现效果，动态效果懒得录视频了

安装

1.安装ScottPlot.Avalonia NuGet包

注意：
如果开发环境是macos、linux，需要按照官网步骤配置环境
此处是官网配置链接

代码部分

view部分 注意安装包之后引入
xmlns:ScottPlot="clr-namespace:ScottPlot.Avalonia;assembly=ScottPlot.Avalonia"

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d" d:DesignWidth="1920" d:DesignHeight="600"
        xmlns:vm="using:AvaloniaMedical.ViewModels"
        x:Class="AvaloniaMedical.Views.xx"
		 xmlns:ScottPlot="clr-namespace:ScottPlot.Avalonia;assembly=ScottPlot.Avalonia"
		x:DataType="vm:xx"
        xmlns:views="clr-namespace:AvaloniaMedical.Views"
		xmlns:i="clr-namespace:Avalonia.Xaml.Interactivity;assembly=Avalonia.Xaml.Interactivity"
        xmlns:controls1="clr-namespace:Material.Styles.Controls;assembly=Material.Styles"
		Background="#31363A"
        >
        此处只显示三导心电
	
		<ScottPlot:AvaPlot Height="200"  Name="AvaPlotName1" Grid.Row="1" Grid.Column="0" >

		</ScottPlot:AvaPlot>

		<ScottPlot:AvaPlot Height="200"  Name="AvaPlotName2" Grid.Row="2" Grid.Column="0" >

		</ScottPlot:AvaPlot>
		<ScottPlot:AvaPlot Height="200" Name="AvaPlotName3" Grid.Row="3" Grid.Column="0" >

		</ScottPlot:AvaPlot>
</Window>

using System;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Threading;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Data;
using Avalonia.Markup.Xaml;
using Avalonia.Threading;
using AvaloniaMedical.ViewModels;
using Npoi.Mapper;
using ScottPlot;
using ScottPlot.Avalonia;
using ScottPlot.Plottable;

namespace AvaloniaMedical.Views;

public partial class xx : Window
{
    private readonly double[] liveData = new double[4000];
    private readonly double[] liveData2 = new double[4000];
    private readonly double[] liveData3 = new double[4000];



    private readonly Timer _updateDataTimer;
    private readonly DispatcherTimer _renderTimer;
    private readonly VLine vline;
    private readonly VLine vline2;
    private readonly VLine vline3;
    int nextValueIndex = -1;
    int nextValueIndex2 = -1;
    int nextValueIndex3= -1;

    AvaPlot AvaPlot1;
    AvaPlot AvaPlot2;
    AvaPlot AvaPlot3;
    public xx()
    {
        InitializeComponent();
        
#if DEBUG
        this.AttachDevTools();
#endif
        AvaPlot1 = this.Find<AvaPlot>("AvaPlotName1");
        AvaPlot2 = this.Find<AvaPlot>("AvaPlotName2");
        AvaPlot3 = this.Find<AvaPlot>("AvaPlotName3");

        AvaPlot1.Plot.AddSignal(liveData, 1, color: Color.LightGreen);
        AvaPlot1.Plot.AxisAutoX(margin: 0);
        AvaPlot1.Plot.SetAxisLimits(yMin: 2, yMax:7);

        AvaPlot2.Plot.AddSignal(liveData2, 1, color: Color.LightGreen);
        AvaPlot2.Plot.AxisAutoX(margin: 0);
        AvaPlot2.Plot.SetAxisLimits(yMin: 2, yMax: 7);

        AvaPlot3.Plot.AddSignal(liveData3, 1, color: Color.LightGreen);
        AvaPlot3.Plot.AxisAutoX(margin: 0);
        AvaPlot3.Plot.SetAxisLimits(yMin: 2, yMax: 7);


        vline = AvaPlot1.Plot.AddVerticalLine(0, Color.LightGreen, 1);
        vline2 = AvaPlot2.Plot.AddVerticalLine(0, Color.LightGreen, 1);
        vline3 = AvaPlot3.Plot.AddVerticalLine(0, Color.LightGreen, 1);
        ///Binding binding = new Binding();
        binding.Source = AvaPlot1;
        binding.Path = new ropertyPath();
        AvaPlot1.SetValue(TagProperty, 0);
        AvaPlot1.Plot.Style(Style.Gray1); 
        AvaPlot2.Plot.Style(Style.Gray1); 
        AvaPlot3.Plot.Style(Style.Gray1);


         customize styling
        //AvaPlot1.Plot.Title("Electrocardiogram Strip Chart");


        AvaPlot1.Plot.Grid(true);
        AvaPlot2.Plot.Grid(true);
        AvaPlot3.Plot.Grid(true);






        // create a traditional timer to update the data
        //_updateDataTimer = new Timer(_ => UpdateData(), null, 0, 1);

         create a separate timer to update the GUI
        _renderTimer = new DispatcherTimer
        {
            Interval = TimeSpan.FromMilliseconds(1)
        };
        _renderTimer.Tick += Render;
        _renderTimer.Start();

        Closed += (sender, args) =>
        {
            _updateDataTimer?.Dispose();
            _renderTimer?.Stop();
        };
    }
    public void UpdateChart(double dto)
    {
        UpdateData(dto);
    }

    public void UpdateChart2(double dto)
    {
        UpdateData2(dto);
    }

    public void UpdateChart3(double dto)
    {
        UpdateData3(dto);
    }
    void UpdateData(double dto)
   {
        // "scroll" the whole chart to the left
        // Array.Copy(liveData, 1, liveData, 0, liveData.Length - 1);

        // place the newest data point at the end

            double nextValue = dto;
            nextValueIndex = (nextValueIndex < liveData.Length - 1) ? nextValueIndex + 1 : 0;
            liveData[nextValueIndex] = nextValue;
            vline.IsVisible = true;
            vline.X = nextValueIndex;
       
    }

    void UpdateData2(double dto)
    {
        // "scroll" the whole chart to the left
        // Array.Copy(liveData, 1, liveData, 0, liveData.Length - 1);

        // place the newest data point at the end

        double nextValue = dto;
        nextValueIndex2 = (nextValueIndex2 < liveData2.Length - 1) ? nextValueIndex2 + 1 : 0;
        liveData2[nextValueIndex2] = nextValue;
        vline2.IsVisible = true;
        vline2.X = nextValueIndex2;

    }

    void UpdateData3(double dto)
    {
        // "scroll" the whole chart to the left
        // Array.Copy(liveData, 1, liveData, 0, liveData.Length - 1);

        // place the newest data point at the end

        double nextValue = dto;
        nextValueIndex3 = (nextValueIndex3 < liveData3.Length - 1) ? nextValueIndex3 + 1 : 0;
        liveData3[nextValueIndex3] = nextValue;
        vline3.IsVisible = true;
        vline3.X = nextValueIndex3;

    }


    void Render(object sender, EventArgs e)
    {
        AvaPlot1.Refresh();
        AvaPlot2.Refresh();
        AvaPlot3.Refresh();
    }

    private void InitializeComponent()
    {
        AvaloniaXamlLoader.Load(this);
    }

    protected override void OnClosing(CancelEventArgs e)
    {
        this.Hide();
        base.OnClosing(e);
    }

    

}

UpdateData方法就是用来更新心电图表的方法， 根据消息队列数据去更新是视图中的ScottPlot 图表