/// <summary>
/// Convert back the value to a boolean
/// </summary>
/// <remarks>If the <paramref name="value"/> parameter is a reference type, <see cref="TrueValue"/> must match its reference to return true.</remarks>
/// <param name="value">The target data being passed to the source.</param>
/// <param name="targetType">The type of the target property, as a type reference (System.Type for Microsoft .NET, a TypeName helper struct for Visual C++ component extensions (C++/CX)).</param>
/// <param name="parameter">An optional parameter to be used to invert the converter logic.</param>
/// <param name="language">The language of the conversion.</param>
/// <returns>The value to be passed to the source object.</returns>
public object ConvertBack(object value, Type targetType, object parameter, string language)
{
bool result = Equals(value, ConverterTools.Convert(TrueValue, value.GetType()));
if (ConverterTools.TryParseBool(parameter))
{
result = !result;
}
return(result);
}
/// <summary>
/// Convert a boolean value to an other object.
/// </summary>
/// <param name="value">The source data being passed to the target.</param>
/// <param name="targetType">The type of the target property, as a type reference.</param>
/// <param name="parameter">An optional parameter to be used to invert the converter logic.</param>
/// <param name="language">The language of the conversion.</param>
/// <returns>The value to be passed to the target dependency property.</returns>
public object Convert(object value, Type targetType, object parameter, string language)
{
var isEmpty = CheckValueIsEmpty(value);
// Negate if needed
if (ConverterTools.TryParseBool(parameter))
{
isEmpty = !isEmpty;
}
return(ConverterTools.Convert(isEmpty ? EmptyValue : NotEmptyValue, targetType));
}
/// <summary>
/// Convert a boolean value to an other object.
/// </summary>
/// <param name="value">The source data being passed to the target.</param>
/// <param name="targetType">The type of the target property, as a type reference.</param>
/// <param name="parameter">An optional parameter to be used to invert the converter logic.</param>
/// <param name="language">The language of the conversion.</param>
/// <returns>The value to be passed to the target dependency property.</returns>
public object Convert(object value, Type targetType, object parameter, string language)
{
bool boolValue = value is bool && (bool)value;
// Negate if needed
if (ConverterTools.TryParseBool(parameter))
{
boolValue = !boolValue;
}
return(ConverterTools.Convert(boolValue ? TrueValue : FalseValue, targetType));
}