Auto Updates On Gauges

sample image

View model

using System;
using System.Collections.Generic;
using LiveChartsCore;
using LiveChartsCore.Defaults;
using LiveChartsCore.Measure;
using LiveChartsCore.SkiaSharpView;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;

namespace ViewModelsSamples.Pies.Gauge5;

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

    public ViewModel()
    {
        ObservableValue1 = new ObservableValue { Value = 50 };
        ObservableValue2 = new ObservableValue { Value = 80 };

        Series = new GaugeBuilder()
            .WithOffsetRadius(5)
            .WithLabelsPosition(PolarLabelsPosition.Start)
            .AddValue(ObservableValue1, "North")
            .AddValue(ObservableValue2, "South")
            .BuildSeries();
    }

    public ObservableValue ObservableValue1 { get; set; }
    public ObservableValue ObservableValue2 { get; set; }
    public IEnumerable<ISeries> Series { get; set; }

    [RelayCommand]
    public void DoRandomChange()
    {
        // modifying the Value property updates and animates the chart automatically
        ObservableValue1.Value = _random.Next(0, 100);
        ObservableValue2.Value = _random.Next(0, 100);
    }
}

HTML

@page "/Pies/Gauge5"
@using LiveChartsCore.SkiaSharpView.Blazor
@using ViewModelsSamples.Pies.Gauge5

<style>
	.sample-wrap {
		display: inline-block;
		width: 600px;
		height: 600px;
	}
</style>

<button class="btn btn-primary" @onclick="ViewModel.DoRandomChange">
	Update Value
</button>

<div class="sample-wrap">
	<PieChart
		Series="ViewModel.Series"
		InitialRotation="-90"
        MaxAngle="270"
        Total="100"
		LegendPosition="LiveChartsCore.Measure.LegendPosition.Bottom">
	</PieChart>
</div>

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

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