Sections
The [ObservableObject], [ObservableProperty] and [RelayCommand] attributes come from the
CommunityToolkit.Mvvm package, you can read 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 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)
}
}
};
}
XAML
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="XamarinSample.General.Sections2.View"
xmlns:lvc="clr-namespace:LiveChartsCore.SkiaSharpView.Xamarin.Forms;assembly=LiveChartsCore.SkiaSharpView.XamarinForms"
xmlns:vms="clr-namespace:ViewModelsSamples.General.Sections2;assembly=ViewModelsSamples">
<ContentPage.BindingContext>
<vms:ViewModel/>
</ContentPage.BindingContext>
<lvc:CartesianChart
Series="{Binding Series}"
Sections="{Binding Sections}">
</lvc:CartesianChart>
</ContentPage>
