Sections

View model

using CommunityToolkit.Mvvm.ComponentModel;
using LiveChartsCore;
using LiveChartsCore.Defaults;
using LiveChartsCore.SkiaSharpView;
using LiveChartsCore.SkiaSharpView.Painting;
using LiveChartsCore.SkiaSharpView.Painting.Effects;
using SkiaSharp;

namespace ViewModelsSamples.General.Sections2;

public partial class ViewModel : ObservableObject
{
    public RectangularSection[] Sections { get; set; } =
    {
        new RectangularSection
        {
            Yi = 8,
            Yj = 8,
            Stroke = new SolidColorPaint
            {
                Color = SKColors.Red,
                StrokeThickness = 3,
                PathEffect = new DashEffect(new float[] { 6, 6 })
            }
        },
        new RectangularSection
        {
            Xi = 4,
            Xj = 6,
            Fill = new SolidColorPaint { Color = SKColors.Blue.WithAlpha(20) }
        },
    };

    public ISeries[] Series { get; set; } =
    {
        new ScatterSeries<ObservablePoint>
        {
            GeometrySize = 10,
            Stroke = new SolidColorPaint { Color = SKColors.Blue, StrokeThickness = 1 },
            Fill = null,
            Values = new ObservablePoint[]
            {
                new(2.2, 5.4), new(4.5, 2.5), new(4.2, 7.4),
                new(6.4, 9.9), new(4.2, 9.2), new(5.8, 3.5),
                new(7.3, 5.8), new(8.9, 3.9), new(6.1, 4.6),
                new(9.4, 7.7), new(8.4, 8.5), new(3.6, 9.6),
                new(4.4, 6.3), new(5.8, 4.8), new(6.9, 3.4),
                new(7.6, 1.8), new(8.3, 8.3), new(9.9, 5.2),
                new(8.1, 4.7), new(7.4, 3.9), new(6.8, 2.3)
            }
        }
    };
}

Form code behind

using System.Windows.Forms;
using LiveChartsCore.SkiaSharpView.WinForms;
using ViewModelsSamples.General.Sections2;

namespace WinFormsSample.General.Sections2;

public partial class View : UserControl
{
    public View()
    {
        InitializeComponent();
        Size = new System.Drawing.Size(50, 50);

        var viewModel = new ViewModel();

        var cartesianChart = new CartesianChart
        {
            Series = viewModel.Series,
            Sections = viewModel.Sections,

            // out of livecharts properties...
            Location = new System.Drawing.Point(0, 0),
            Size = new System.Drawing.Size(50, 50),
            Anchor = AnchorStyles.Left | AnchorStyles.Right | AnchorStyles.Top | AnchorStyles.Bottom
        };

        Controls.Add(cartesianChart);
    }
}

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