Auto Updates On Gauges

View model

using System;
using CommunityToolkit.Mvvm.Input;
using CommunityToolkit.Mvvm.ComponentModel;

namespace ViewModelsSamples.Pies.Gauge5;

public partial class ViewModel : ObservableObject
{
    private readonly Random _random = new();

    [ObservableProperty]
    public partial double Value1 { get; set; } = 50;

    [ObservableProperty]
    public partial double Value2 { get; set; } = 80;

    [RelayCommand]
    public void DoRandomChange()
    {
        Value1 = _random.Next(0, 100);
        Value2 = _random.Next(0, 100);
    }
}

XAML

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage
    x:Class="MauiSample.Pies.Gauge5.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.Pies.Gauge5;assembly=ViewModelsSamples"
    x:DataType="vms:ViewModel">

    <ContentPage.BindingContext>
        <vms:ViewModel/>
    </ContentPage.BindingContext>

    <Grid RowDefinitions="Auto, *">

        <Button
            Grid.Row="0"
            Command="{Binding DoRandomChangeCommand}"
            Text="Change Value"/>

        <lvc:PieChart
            Grid.Row="1"
            InitialRotation="-90"
            MinValue="0"
            MaxValue="100"
            MaxAngle="270"
            LegendPosition="Bottom">

            <lvc:PieChart.Series>
                <lvc:SeriesCollection>
                    <lvc:XamlGaugeSeries
                        SeriesName="North"
                        GaugeValue="{Binding Value1}"
                        DataLabelsPosition="Start"/>

                    <lvc:XamlGaugeSeries
                        SeriesName="South"
                        GaugeValue="{Binding Value2}"
                        DataLabelsPosition="Start"/>
                </lvc:SeriesCollection>
            </lvc:PieChart.Series>

        </lvc:PieChart>
    </Grid>
</ContentPage>

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