C# DynamicDataDisplay制作动态曲线

用C#和DynamicDataDisplay.dll编写的读取.mat文件中音频信息并用动态折线图显示

//所需头文件
using System;
using System.Windows;
using System.Windows.Media;
using System.Windows.Threading;
using MathNet.Numerics.Data.Matlab;//两个MathNet用于读取.mat文件
using MathNet.Numerics.LinearAlgebra;
using Microsoft.Research.DynamicDataDisplay;
using Microsoft.Research.DynamicDataDisplay.DataSources;

//定义
        public ObservableDataSource[] dataSource = new ObservableDataSource[2] { new ObservableDataSource(), new ObservableDataSource() };
        private DispatcherTimer timer = new DispatcherTimer();
        private LineGraph graph = new LineGraph();
        private int i = 0;//已画的点数
        private double currentSecond = 0;//当前点的横坐标
        bool flag = false;//用于切换曲线测试，flag为false时显示曲线0，flag为true时显示曲线1
        double[][] y;
        double xaxis = 0;//plotter显示时的初始横坐标，用于曲线随x轴移动时
        double[] ymax = new double[8] { 0,0,0,0,0,0,0,0 };
        double yaxis;//plotter显示时的纵坐标，用于曲线随x轴移动时
        double group = 0.015;//默认组距 
        bool stop = false;//用于曲线暂停测试，stop为true时停止画线

public MainWindow()
        {
            InitializeComponent();
            Matrix<double> filt_data = MatlabReader.Read<double>("FrameworkData_01.mat", "filt_data");//读取.mat文件中的音频信息
            y = filt_data.ToColumnArrays();//将矩阵转换为二维数组
        }

        /*******
         * private void AnimatedPlot(object sender, EventArgs e)
         * 用于构造坐标点
         *******/
        private void AnimatedPlot(object sender, EventArgs e)
        {
            double x = currentSecond;

            Point[] point = new Point[2];//定义并添加需要画的新点
            point[0] = new Point(x, y[0][i]);
            point[1] = new Point(x, y[1][i]);

            dataSource[0].AppendAsync(base.Dispatcher, point[0]);//将新点添加到队列（？）中
            dataSource[1].AppendAsync(base.Dispatcher, point[1]);

            i++;

            //计算此时plotter需要显示的最小横坐标
            if (currentSecond - group > 0)
            {
                xaxis = currentSecond - group;
            }
            else
            {
                xaxis = 0;
            }

            //计算此时plotter需要显示的最大纵坐标
            for(int j = 0; j < point.Length; j++)
            {
                if (Math.Abs(y[j][i]) > ymax[j])
                    ymax[j] = Math.Abs(y[j][i]);
            }

            if ( !flag )
            {
                yaxis = ymax[0];
            }
            else
            {
                yaxis = ymax[1];
            }

            plotter.Viewport.Visible = new System.Windows.Rect(xaxis, -yaxis, group, 2 * yaxis);//设置plotter随x轴移动
            currentSecond += 1.0 / 20000;//文件中音频采率为20000
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            timer.Interval = TimeSpan.FromSeconds(1.0/20000);//设置计时器间隔为1/20000秒
            timer.Tick += new EventHandler(AnimatedPlot);//连续执行AnimatedPlot 事件实时绘制新坐标点
            timer.IsEnabled = true;//开启计时器
            graph = plotter.AddLineGraph(dataSource[0], Colors.Green, 2, "Percentage");//初始曲线为曲线0
            plotter.Viewport.FitToView();
        }

//测试用按钮函数
        private void button_Click(object sender, RoutedEventArgs e)
        {
            /****
             * 测试曲线切换
             * */
            //flag = !flag;
            //plotter.Children.Remove(graph);//移除当前曲线

            //if (flag)
            //{
            //    graph = plotter.AddLineGraph(dataSource[1], Colors.Green, 2, "Percentage");//显示曲线1
            //}
            //else
            //{
            //    graph = plotter.AddLineGraph(dataSource[0], Colors.Green, 2, "Percentage");//显示曲线2
            //}



            /****
             * 测试曲线暂停
             * */
            stop = !stop;
            if( stop)
            {
                timer.IsEnabled = false;
            }
            else
            {
                timer.IsEnabled = true;
            }
        }

xaml代码：

<Window x:Class="key_cam_03.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        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"
        xmlns:d3="http://research.microsoft.com/DynamicDataDisplay/1.0"
        xmlns:local="clr-namespace:key_cam_03"
        mc:Ignorable="d"
        Title="MainWindow" Loaded="Window_Loaded" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        Grid.RowDefinitions>
        <d3:ChartPlotter x:Name="plotter" Margin="10,20,20,20" Grid.Row="1">
            <d3:ChartPlotter.VerticalAxis>
                <d3:VerticalAxis/>
            d3:ChartPlotter.VerticalAxis>

            <d3:ChartPlotter.HorizontalAxis>
                <d3:HorizontalTimeSpanAxis/>
            d3:ChartPlotter.HorizontalAxis>

            <d3:Header Content="Data Display"/>
            <d3:VerticalAxisTitle Content="sound pressure"/>
        d3:ChartPlotter>
        <Button x:Name="button" Content="Button" HorizontalAlignment="Left" Width="75" Margin="400,0,0,0" Click="button_Click"/>
    Grid>
Window>