beto-rodriguez/Live-Charts

`private int movingPointIdx = -1; //-1: no point moving
    private ChartValues<ObservablePoint> chartValues;
    public LUTgraph()
    {
        InitializeComponent();
    }
    public SeriesCollection Series

{
get => (SeriesCollection)GetValue(SeriesProperty);
set => SetValue(SeriesProperty, value);
}
public static readonly DependencyProperty SeriesProperty = DependencyProperty.Register(nameof(Series), typeof(SeriesCollection), typeof(LUTgraph));

public string XLabel
{
get => (string)GetValue(XLabelProperty);
set => SetValue(XLabelProperty, value);
}
public static readonly DependencyProperty XLabelProperty = DependencyProperty.Register(nameof(XLabel), typeof(string), typeof(LUTgraph));

public string YLabel
{
get => (string)GetValue(YLabelProperty);
set => SetValue(YLabelProperty, value);
}
public static readonly DependencyProperty YLabelProperty = DependencyProperty.Register(nameof(YLabel), typeof(string), typeof(LUTgraph));

    //Gets the chart points position
    private void ChartOnDataClick(object sender, ChartPoint p)
    {
        var asPixels = diagram.ConvertToPixels(p.AsPoint());
        chartValues = (ChartValues<ObservablePoint>)Series[0].Values;

        foreach(ObservablePoint val in chartValues)
        {
            if(val.X == p.X && val.Y == p.Y) //this is the clicked point
            {
                movingPointIdx = chartValues.IndexOf(val); //activate point moving
            }
        }
    }


    public void ChartMouseMove(object sender, MouseEventArgs e)
    {
        var point = diagram.ConvertToChartValues(e.GetPosition(diagram));

        X.Text = point.X.ToString("N");
        Y.Text = point.Y.ToString("N");

        if(e.LeftButton != MouseButtonState.Pressed)
        {
            return;
        }

        if(movingPointIdx == -1)
        {
            return;
        }

        var newPoint = diagram.ConvertToChartValues(e.GetPosition(this));

        chartValues[movingPointIdx].X = newPoint.X;
        chartValues[movingPointIdx].Y = newPoint.Y;
    }

    private void Diagram_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
    {
        movingPointIdx = -1; //deactivate point moving
    }

    private void AddPoints(object sender, RoutedEventArgs e)
    {
        chartValues.Add(new ObservablePoint());
    }

    private void RemovePoints(object sender, RoutedEventArgs e)
    {
        if(chartValues.Count > 4) //predetermined values
        {
            chartValues.RemoveAt(movingPointIdx);
        }
    }`