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);
    }
}

HTML

@page "/Bars/Custom"
@using LiveChartsCore.SkiaSharpView.Blazor
@using ViewModelsSamples.Bars.Custom

<CartesianChart
	Series="ViewModel.Series">
</CartesianChart>

@code {
	public ViewModel ViewModel { get; set; } = new();
}

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