prs/prs.mobile/comal.timesheets/CustomControls/ToolGrid/ToolGrid.xaml.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace comal.timesheets
{

    public class ToolGridViewModel : BindableObject
    {
        public IList<IToolItem> Items { get; private set; }

        public IList<IToolItem> VisibleItems { get; private set; }
        
        public ToolGridViewModel()
        {
            Items = new ObservableCollection<IToolItem>();
            VisibleItems = new ObservableCollection<IToolItem>();
            ((ObservableCollection<IToolItem>)Items).CollectionChanged += (sender, args) =>
            {
                VisibleItems.Clear();
                foreach (var item in Items.Where(x=>x.IsVisible))
                    VisibleItems.Add(item);
            };
        }
        
    }
    
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class ToolGrid
    {

        public IList<IToolItem> Items => _viewModel.Items;
        
        public ToolGrid()
        {
            InitializeComponent();
            BindableLayout.SetItemsSource(_flexgrid, _viewModel.VisibleItems);
        }
        
        private void ImageTapped(object sender, EventArgs e)
        {
            if ((sender is Image image) && (image.BindingContext is ToolItem item))
                item.DoTap();
        }
    }
}