Custom Bars

View model

using CommunityToolkit.Mvvm.ComponentModel;
using LiveChartsCore;
using LiveChartsCore.Drawing;
using LiveChartsCore.SkiaSharpView;
using LiveChartsCore.SkiaSharpView.Drawing.Geometries;

namespace ViewModelsSamples.Bars.Custom;

public partial class ViewModel : ObservableObject
{
    public ISeries[] Series { get; set; } =
        {
            new ColumnSeries<double>
            {
                Values = new double[] { 2, 1, 4},
            },

            // You can also use SVG paths to draw the geometry
            // LiveCharts already provides some predefined paths in the SVGPoints class.
            new ColumnSeries<double, SVGPathGeometry>
            {
                Values = new double[] { -2, 2, 1 },
                GeometrySvg = SVGPoints.Star
            },

            // you can declare your own gemetry and use the SkiaSharp api to draw it
            new ColumnSeries<double, MyGeometry>
            {
                Values = new double[] { 4, 5, 2 },
            },
        };
}

MyGeometry.cs

using LiveChartsCore.SkiaSharpView.Drawing;
using LiveChartsCore.SkiaSharpView.Drawing.Geometries;
using SkiaSharp;

namespace ViewModelsSamples.Lines.Custom;

public class MyGeometry : SizedGeometry
{
    public override void OnDraw(SkiaSharpDrawingContext context, SKPaint paint)
    {
        var canvas = context.Canvas;

        canvas.DrawRect(X, Y, Width, Height, paint);
        canvas.DrawLine(X, Y, X + Width, Y + Height, paint);
        canvas.DrawLine(X + Width, Y, X, Y + Height, paint);
    }
}

Form code behind

using System.Windows.Forms;
using LiveChartsCore.SkiaSharpView.WinForms;
using ViewModelsSamples.Bars.Custom;

namespace WinFormsSample.Bars.Custom;

public partial class View : UserControl
{
    private readonly CartesianChart cartesianChart;

    public View()
    {
        InitializeComponent();
        Size = new System.Drawing.Size(50, 50);

        var viewModel = new ViewModel();

        cartesianChart = new CartesianChart
        {
            Series = viewModel.Series,

            // 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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