using System.Globalization;
using System.Windows.Data;

namespace NeoUI.Converters;

/// <summary>
/// 隔行交错背景颜色
/// </summary>
[ValueConversion(typeof(int), typeof(Visibility))]
public class InterlacedBackgroundConverter : IValueConverter
{
    public static readonly InterlacedBackgroundConverter Instance = new();

    /// <inheritdoc />
    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        var line = (int)(value ?? throw new ArgumentNullException(nameof(value)));
        return line % 2 == 0 ? Visibility.Collapsed : Visibility.Visible;
    }

    /// <inheritdoc />
    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        return Binding.DoNothing;
    }
}