Basic Heat

View Model

using LiveChartsCore;
using LiveChartsCore.Defaults;
using LiveChartsCore.Kernel.Sketches;
using LiveChartsCore.SkiaSharpView;
using SkiaSharp;

namespace ViewModelsSamples.Heat.Basic;

public class ViewModel
{
    public ISeries[] Series { get; set; } = [
        new HeatSeries<WeightedPoint>
        {
            HeatMap = [
                new SKColor(255, 241, 118).AsLvcColor(), // the first element is the "coldest"
                SKColors.DarkSlateGray.AsLvcColor(),
                SKColors.Blue.AsLvcColor() // the last element is the "hottest"
            ],
            Values = [
                // Charles
                new(0, 0, 150), // Jan
                new(0, 1, 123), // Feb
                new(0, 2, 310), // Mar
                new(0, 3, 225), // Apr
                new(0, 4, 473), // May
                new(0, 5, 373), // Jun

                // Richard
                new(1, 0, 432), // Jan
                new(1, 1, 312), // Feb
                new(1, 2, 135), // Mar
                new(1, 3, 78), // Apr
                new(1, 4, 124), // May
                new(1, 5, 423), // Jun

                // Ana
                new(2, 0, 543), // Jan
                new(2, 1, 134), // Feb
                new(2, 2, 524), // Mar
                new(2, 3, 315), // Apr
                new(2, 4, 145), // May
                new(2, 5, 80), // Jun

                // Mari
                new(3, 0, 90), // Jan
                new(3, 1, 123), // Feb
                new(3, 2, 70), // Mar
                new(3, 3, 123), // Apr
                new(3, 4, 432), // May
                new(3, 5, 142), // Jun
            ]
        }
    ];

    public ICartesianAxis[] XAxes { get; set; } = [
        new Axis
        {
            Labels = ["Charles", "Richard", "Ana", "Mari"]
        }
    ];

    public ICartesianAxis[] YAxes { get; set; } = [
        new Axis
        {
            Labels = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
        }
    ];
}

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.Heat.Basic.View"
             xmlns:lvc="clr-namespace:LiveChartsCore.SkiaSharpView.Xamarin.Forms;assembly=LiveChartsCore.SkiaSharpView.XamarinForms"
             xmlns:vms="clr-namespace:ViewModelsSamples.Heat.Basic;assembly=ViewModelsSamples">
    <ContentPage.BindingContext>
        <vms:ViewModel/>
    </ContentPage.BindingContext>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <lvc:CartesianChart Series="{Binding Series}" XAxes="{Binding XAxes}" YAxes="{Binding YAxes}"></lvc:CartesianChart>
    </Grid>
</ContentPage>

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