散点线系列视图¶

CartesianSeries series = new CartesianSeries();
chartControl.Series.Add(series);
List<(double, double)> points = new List<(double, double)>() { (0, 2), (-1, 3), (-2, 0), (2,1), (-2,5) };
// The ScatterDataAdapter allows unsorted points
series.DataAdapter = new ScatterDataAdapter(points);
series.View = new CartesianScatterLineSeriesView()
{
    Color = Avalonia.Media.Colors.Green,
    MarkerSize = 4,
};

using Avalonia;
using Avalonia.Media;
using CommunityToolkit.Mvvm.ComponentModel;
using Eremex.AvaloniaUI.Charts;
using System;
using System.Collections.Generic;

namespace ChartScatterLineSeriesView.ViewModels;

public partial class MainWindowViewModel : ViewModelBase
{
    [ObservableProperty] SeriesViewModel scatterLineSeriesVM1;

    public MainWindowViewModel()
    {
        ScatterLineSeriesVM1 = new()
        {
            Color = Color.FromUInt32(0xff0d628d),
            DataAdapter = new ScatterDataAdapter(GenerateSquareSpiralData())
        };
    }

    private List<(double, double)> GenerateSquareSpiralData()
    {
        List<(double, double)> points = new List<(double, double)> ();
        double x = 2, y = 2;
        int stepsPerSide = 1; // Steps before changing direction
        int direction = 3; // 0=right, 1=up, 2=left, 3=down
        int turns = 4;
        double stepSize = 1.0;

        points.Add((x, y));

        for (int i = 0; i < turns * 4; i++) // 4 sides per turn
        {
            for (int step = 0; step < stepsPerSide; step++)
            {
                switch (direction)
                {
                    case 0: x += stepSize; break; // Right
                    case 1: y += stepSize; break; // Up
                    case 2: x -= stepSize; break; // Left
                    case 3: y -= stepSize; break; // Down
                }
                points.Add((x, y));
            }
            direction = (direction + 1) % 4; // Change direction
            if (i % 2 == 1) stepsPerSide++; // Increase steps every 2 turns
        }
        return points;
    }
}

public partial class SeriesViewModel : ObservableObject
{
    [ObservableProperty] Color color;
    [ObservableProperty] ScatterDataAdapter dataAdapter;
}