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

namespace ZeroLevel.WPF
{
    public sealed class BoolToVisibilityConverter : BaseConvertor<BoolToVisibilityConverter>
    {
        public Visibility TrueValue { get; set; }
        public Visibility FalseValue { get; set; }

        public BoolToVisibilityConverter()
        {
            TrueValue = Visibility.Visible;
            FalseValue = Visibility.Collapsed;
        }

        public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (!(value is bool))
                return null;
            return (bool)value ? TrueValue : FalseValue;
        }

        public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (Equals(value, TrueValue))
                return true;
            if (Equals(value, FalseValue))
                return false;
            return null;
        }
    }
}