Custom Bars
This sample uses C# 12 features, it also uses features from the CommunityToolkit.Mvvm package, you can learn more about it here.
This web site wraps every sample using a ContentPage instance, but LiveCharts controls can be used inside any container.
View model
using LiveChartsCore;
using LiveChartsCore.Drawing;
using LiveChartsCore.SkiaSharpView;
using LiveChartsCore.SkiaSharpView.Drawing.Geometries;
namespace ViewModelsSamples.Bars.Custom;
public class ViewModel
{
public ISeries[] Series { get; set; } = [
new ColumnSeries<double> ([2, 1, 4]),
// use the second generic parameter to define the geometry to draw
// there are many predefined geometries in the LiveChartsCore.Drawing namespace
// for example, the StarGeometry, CrossGeometry, RectangleGeometry and DiamondGeometry
new ColumnSeries<double, DiamondGeometry>([4, 3, 6]),
// You can also use SVG paths to draw the geometry
// the VariableSVGPathGeometry can change the drawn path at runtime
new ColumnSeries<double, VariableSVGPathGeometry>([-2, 2, 1])
{
GeometrySvg = SVGPoints.Star
},
// finally you can also use SkiaSharp to draw your own geometry
new ColumnSeries<double, MyGeometry>([4, 5, 2])
];
}
MyGeometry.cs
using LiveChartsCore.Drawing;
using LiveChartsCore.SkiaSharpView.Drawing;
namespace ViewModelsSamples.Bars.Custom;
public class MyGeometry : BoundedDrawnGeometry, IDrawnElement<SkiaSharpDrawingContext>
{
public void Draw(SkiaSharpDrawingContext context)
{
var paint = context.ActiveSkiaPaint;
var canvas = context.Canvas;
var y = Y;
while (y < Y + Height)
{
canvas.DrawLine(X, y, X + Width, y, paint);
y += 5;
}
}
}
XAML
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage x:Class="MauiSample.Bars.Custom.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.Bars.Custom;assembly=ViewModelsSamples"
>
<ContentPage.BindingContext>
<vms:ViewModel/>
</ContentPage.BindingContext>
<ContentPage.Content>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<lvc:CartesianChart Series="{Binding Series}"></lvc:CartesianChart>
</Grid>
</ContentPage.Content>
</ContentPage>
