using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Data;
namespace butterflow_ui
{
/// An inverse bool visibility converter.
[ValueConversion(typeof(bool), typeof(Visibility))]
public class InverseBoolVisibilityConverter : IValueConverter
{
/// Converts a value.
/// Thrown when an object cannot be cast to a required
/// type.
/// The value produced by the binding source.
/// The type of the binding target property.
/// The converter parameter to use.
/// The culture to use in the converter.
///
/// A converted value. If the method returns , the valid null value is
/// used.
///
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (targetType == typeof(Visibility))
{
return (bool)value ? Visibility.Hidden : Visibility.Visible;
}
throw new InvalidCastException(string.Format("Cannot convert type to {0} from bool.", targetType.Name));
}
/// Converts a value.
/// Thrown when an object cannot be cast to a required
/// type.
/// The value that is produced by the binding target.
/// The type to convert to.
/// The converter parameter to use.
/// The culture to use in the converter.
///
/// A converted value. If the method returns , the valid null value is
/// used.
///
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
if (targetType == typeof(Visibility))
{
return ((Visibility)value == Visibility.Visible) ? false : true;
}
throw new InvalidCastException(string.Format("Cannot convert type {0} to boolean.", targetType.Name));
}
}
}