Customize Visuals

View Model

using SkiaSharp;
using LiveChartsCore;
using LiveChartsCore.Kernel.Events;
using LiveChartsCore.Measure;
using LiveChartsCore.SkiaSharpView;
using LiveChartsCore.SkiaSharpView.Painting;

namespace ViewModelsSamples.General.MapPoints;

public class ViewModel
{
    public ISeries[] Series { get; set; }

    public ViewModel()
    {
        var paints = new SolidColorPaint[]
        {
            new(SKColors.Red),
            new(SKColors.Green),
            new(SKColors.Blue),
            new(SKColors.Yellow)
        };

        var series = new ColumnSeries<int>
        {
            Values = [2, 5, 4, 6, 8, 3, 2, 4, 6],
            DataLabelsPaint = new SolidColorPaint(new SKColor(30, 30, 30)),
            DataLabelsPosition = DataLabelsPosition.Top
        }
        .OnPointMeasured(point =>
        {
            // this method is called for each point in the series
            // we can customize the visual here

            if (point.Visual is null) return;

            // get a paint from the array
            var paint = paints[point.Index % paints.Length];
            // set the paint to the visual
            point.Visual.Fill = paint;
        });

        Series = [series];
    }
}

XAML

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage x:Class="MauiSample.General.MapPoints.View"
             xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:lvc="clr-namespace:LiveChartsCore.SkiaSharpView.Maui;assembly=LiveChartsCore.SkiaSharpView.Maui"
             xmlns:vms="clr-namespace:ViewModelsSamples.General.MapPoints;assembly=ViewModelsSamples"
             >
    <ContentPage.BindingContext>
        <vms:ViewModel/>
    </ContentPage.BindingContext>
	<ContentPage.Content>

        <lvc:CartesianChart Series="{Binding Series}"></lvc:CartesianChart>

    </ContentPage.Content>
</ContentPage>

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