AnalyticsViewModel.cs

using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using Vereinsmeisterschaften.Contracts.ViewModels;
using Vereinsmeisterschaften.Views.AnalyticsWidgets;
 
namespace Vereinsmeisterschaften.ViewModels
{
    public partial class AnalyticsViewModel : ObservableObject, INavigationAware
    {        
        public IEnumerable<IAnalyticsWidget> AvailableAnalyticsWidgets { get; }

        public IEnumerable<IAnalyticsWidget> NormalSizedAnalyticsWidgets => AvailableAnalyticsWidgets.Where(c => !c.IsMaximized);

        public IAnalyticsWidget MaximizedAnalyticsWidget => AvailableAnalyticsWidgets.Where(c => c.IsMaximized).FirstOrDefault();

        public bool IsMaximizedAnalyticsWidgetAvailable => MaximizedAnalyticsWidget != null;

        public AnalyticsViewModel(IEnumerable<IAnalyticsWidget> availableAnalyticsWidgets)
        {
            AvailableAnalyticsWidgets = availableAnalyticsWidgets;
            foreach (IAnalyticsWidget widget in AvailableAnalyticsWidgets)
            {
                widget.IsMaximized = false;
                widget.PropertyChanged += (sender, e) =>
                {
                    if (e.PropertyName == nameof(IAnalyticsWidget.IsMaximized))
                    {
                        OnPropertyChanged(nameof(NormalSizedAnalyticsWidgets));
                        OnPropertyChanged(nameof(IsMaximizedAnalyticsWidgetAvailable));
                        OnPropertyChanged(nameof(MaximizedAnalyticsWidget));
                    }
                };
            }
        }
 
        // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
        [ICommand]
        public void RestoreLayout()
        {
            foreach (IAnalyticsWidget analyticsWidget in AvailableAnalyticsWidgets)
            {
                analyticsWidget.IsMaximized = false;
            }
        }
 
        // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

        public void OnNavigatedFrom()
        {
        }

        public void OnNavigatedTo(object parameter)
        {
            foreach (IAnalyticsWidget analyticsWidget in AvailableAnalyticsWidgets)
            {
                analyticsWidget.Refresh();
            }
        }
    }
}