prs/prs.desktop/Forms/EntitySelectionGrid.cs

using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Media.Imaging;

namespace PRSDesktop
{
    public interface IEntitySelectionGrid
    {
        HashSet<Guid> Entities { get; set; }
    }

    public class EntitySelectionGrid<T> : DynamicGrid<T>, IEntitySelectionGrid where T : Entity, IRemotable, IPersistent, new()
    {
        private readonly BitmapImage unticked = PRSDesktop.Resources.disabled.AsBitmapImage();
        private readonly BitmapImage ticked = PRSDesktop.Resources.tick.AsBitmapImage();

        private HashSet<Guid> _entities;

        public HashSet<Guid> Entities
        {
            get => _entities;
            set
            {
                _entities = value;
            }
        }

        public EntitySelectionGrid()
        {
            Options.BeginUpdate().Clear().AddRange(DynamicGridOption.FilterRows).EndUpdate();

            HiddenColumns.Add(x => x.ID);

            ActionColumns.Add(new DynamicImageColumn(TickImage, TickAction));
        }

        private BitmapImage TickImage(CoreRow? row)
        {
            if (row == null)
            {
                return ticked;
            }
            return _entities.Contains((Guid)row["ID"]) ? ticked : unticked;
        }

        private bool TickAction(CoreRow? row)
        {
            if (row == null)
            {
                if (_entities.Count < Data.Rows.Count)
                {
                    _entities = Data.Rows.Select(x => (Guid)x["ID"]).ToHashSet();
                }
                else
                {
                    _entities.Clear();
                }
                return true;
            }

            var employeeID = (Guid)row["ID"];
            if (_entities.Contains(employeeID))
            {
                _entities.Remove(employeeID);
            }
            else
            {
                _entities.Add(employeeID);
            }
            return true;
        }

        protected override void DeleteItems(params CoreRow[] rows)
        {
        }

        protected override T LoadItem(CoreRow row)
        {
            var id = row.Get<Employee, Guid>(x => x.ID);
            var filter = new Filter<T>(x => x.ID).IsEqualTo(id);
            return new Client<T>().Load(filter).FirstOrDefault();
        }

        protected override void Reload(Filters<T> criteria, Columns<T> columns, ref SortOrder<T> sort, Action<CoreTable, Exception> action)
        {
            new Client<T>().Query(criteria.Combine(), columns, sort, action);
        }

        protected override void SaveItem(T item)
        {
        }
    }
}