PropertyGrid/Avalonia.PropertyGrid/Converters/NegateBoolConverter.cs

using System;
using System.Globalization;
using Avalonia.Data.Converters;

namespace Avalonia.PropertyGrid.Controls;

/// <summary>
/// Converts boolean value to its negation for two-way binding
/// </summary>
public sealed class NegateBoolConverter : IValueConverter
{
    /// <summary>
    /// Converts a boolean value to its negation.
    /// </summary>
    /// <param name="value">The boolean value to convert.</param>
    /// <param name="targetType">The target type.</param>
    /// <param name="parameter">Optional parameter.</param>
    /// <param name="culture">Culture information.</param>
    /// <returns>The negated boolean value.</returns>
    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        if (value is bool boolValue)
        {
            return !boolValue;
        }
        return false;
    }

    /// <summary>
    /// Converts a boolean value back to its negation (two-way binding).
    /// </summary>
    /// <param name="value">The boolean value to convert back.</param>
    /// <param name="targetType">The target type.</param>
    /// <param name="parameter">Optional parameter.</param>
    /// <param name="culture">Culture information.</param>
    /// <returns>The negated boolean value.</returns>
    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        if (value is bool boolValue)
        {
            return !boolValue;
        }
        return false;
    }
}