Bubbles Or Weigthed Series
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 UserControl instance, but LiveCharts controls can be used inside any container.
View model
using System;
using System.Collections.ObjectModel;
using LiveChartsCore;
using LiveChartsCore.Defaults;
using LiveChartsCore.SkiaSharpView;
using LiveChartsCore.SkiaSharpView.Drawing.Geometries;
using CommunityToolkit.Mvvm.ComponentModel;
namespace ViewModelsSamples.Scatter.Bubbles;
public partial class ViewModel : ObservableObject
{
public ViewModel()
{
var r = new Random();
var values1 = new ObservableCollection<WeightedPoint>();
var values2 = new ObservableCollection<WeightedPoint>();
for (var i = 0; i < 8; i++)
{
// the WeightedPoint has 3 properties, X, Y and Weight
// we use the X and Y coordinates to position the point in the chart
// the weight will be used by the library to define the size of the points
// where the minimum weight will be the smallest point, and the max weight the biggest
// for any weight between these limits the library
// will interpolate lineally to determine the size of each point
var x = r.Next(0, 20);
var y = r.Next(0, 20);
var w = r.Next(0, 100);
values1.Add(new WeightedPoint(x, y, w));
// we do the same for our seconds values collection.
values2.Add(new WeightedPoint(r.Next(0, 20), r.Next(0, 20), r.Next(0, 100)));
}
Series = new ISeries[]
{
new ScatterSeries<WeightedPoint>
{
Values = values1,
GeometrySize = 50,
MinGeometrySize = 5
},
new ScatterSeries<WeightedPoint, RoundedRectangleGeometry>
{
Values = values2,
GeometrySize = 50,
MinGeometrySize = 5
}
};
}
public ISeries[] Series { get; set; }
}
XAML
<UserControl
x:Class="UnoWinUISample.Scatter.Bubbles.View"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:lvc="using:LiveChartsCore.SkiaSharpView.WinUI"
xmlns:vms="using:ViewModelsSamples.Scatter.Bubbles"
mc:Ignorable="d">
<UserControl.DataContext>
<vms:ViewModel/>
</UserControl.DataContext>
<Grid>
<lvc:CartesianChart Series="{Binding Series}"></lvc:CartesianChart>
</Grid>
</UserControl>
