prs/prs.mobile.new/PRS.Mobile/Modules/Purchases/PurchaseOrderDetails.xaml.cs

using Comal.Classes;
using InABox.Core;
using InABox.Mobile;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;

namespace PRS.Mobile
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class PurchaseOrderDetails
    {

        private readonly PurchaseOrderItemModel _poitems;
        
        public PurchaseOrderDetails(PurchaseOrderShell shell)
        {
            _poitems = new PurchaseOrderItemModel(App.Data,
                () => new Filter<PurchaseOrderItem>(x => x.PurchaseOrderLink.ID).IsEqualTo(shell.ID)
            );
            
            InitializeComponent();
            Title = $"PO #{shell.PONumber}";
            _items.Columns
                .BeginUpdate()
                .Clear()
                .Add(new MobileGridTextColumn<PurchaseOrderItemShell>()
                    { Column = x => x.JobNumber, Width = GridLength.Auto, Caption = "Job" })
                .Add(new MobileGridTextColumn<PurchaseOrderItemShell>()
                    { Column = x => x.Description, Width = GridLength.Star, Alignment = TextAlignment.Start})
                .Add(new MobileGridDoubleColumn<PurchaseOrderItemShell>()
                    { Column = x => x.Qty, Width = GridLength.Auto })
                .Add(new MobileGridDateColumn<PurchaseOrderItemShell>() { Column = x => x.ReceivedDate, Format = "dd MMM yy", Caption="Rec'd" })
                .EndUpdate();
            
            RefreshData(false, true);
        }

        private void RefreshData(bool force, bool async)
        {
            if (async)
                _poitems.Refresh(force, () => Dispatcher.BeginInvokeOnMainThread(Refresh));
            else
            {
                _poitems.Refresh(force);
                Refresh();
            }
        }

        private void Refresh()
        {
            _items.ItemsSource ??= _poitems.Items;
        }
        
        private void _items_OnRefreshRequested(object sender, MobileGridRefreshRequestArgs args)
        {
            RefreshData(true, false);
        }
    }

    
}