inabox/inabox.wpf/DynamicGrid/Columns/DynamicTickColumn.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Windows.Media.Imaging;
using InABox.Core;
using InABox.WPF;

namespace InABox.DynamicGrid;

public class DynamicTickColumn<T, P> : DynamicImageColumn where T : BaseObject, new() where P : struct
{
    private readonly BitmapImage? Data = Wpf.Resources.tick.AsBitmapImage();

    private readonly BitmapImage? Header;
    private readonly BitmapImage? NoData;
    private readonly Expression<Func<T, P>> Property;

    public DynamicTickColumn(Expression<Func<T, P>> property, BitmapImage? header, BitmapImage? data, BitmapImage? nodata,
        ActionDelegate? action = null) : base(r => null, action)
    {
        Header = header;
        Data = data;
        NoData = nodata;
        Property = property;
        Image = GetImage;

        GetFilter = () => new StaticColumnFilter<bool>(HasData, [
            new("(Blank)", false),
            new("(Not Blank)", true)
        ]);
    }

    private BitmapImage? GetImage(CoreRow? row)
    {
        if (row == null)
            return Header;

        return HasData(row) ? Data : NoData;
    }

    private bool HasData(CoreRow row)
    {
        var value = row.Get(Property);
        return !value.Equals(default(P));
    }
}