/// <summary>
/// Converts the provided value with the specified parameter back to <see cref="bool"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
/// <param name="options">The parameter, usually a string. For supported options, check the class constants starting with PARAM_.</param>
public static bool?ConvertBack(object value, ref string options)
{
if (!(value is ScrollBarVisibility scrollBarVisibilityValue))
{
return(null);
}
var trueEquivalent = GetTrueEquivalent(ref options);
bool boolValue;
if (scrollBarVisibilityValue == ScrollBarVisibility.Disabled)
{
boolValue = false;
}
else
{
if (scrollBarVisibilityValue != trueEquivalent)
{
throw new Exception($"Value is not '{ScrollBarVisibility.Disabled}', but it is not a true equivalent either. The true equivalent is '{trueEquivalent}', but the provided value to convert to bool is '{scrollBarVisibilityValue}'.");
}
boolValue = true;
}
boolValue = (bool)BoolToBoolConverter.Convert(boolValue, ref options);
return(boolValue);
}
/// <summary>
/// Converts the provided value with the specified parameter to <see cref="Visibility"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
/// <param name="options">The parameter, usually a string. For supported options, check the class constants starting with PARAM_.</param>
public static Visibility?Convert(object value, ref string options)
{
bool?boolValue = BoolToBoolConverter.Convert(value, ref options);
if (boolValue == null)
{
return(null);
}
var falseEquivalent = Visibility.Hidden;
if (options != null)
{
// is already lowered in the BoolToBoolConverter
//options = options.ToLowerInvariant();
if (options.Contains(PARAM_COLLAPSE))
{
falseEquivalent = Visibility.Collapsed;
options = StringUtility.RemoveFirstOf(options, PARAM_COLLAPSE);
}
}
return(boolValue.Value ? Visibility.Visible : falseEquivalent);
}
/// <summary>
/// Converts the provided value with the specified parameter to <see cref="ScrollBarVisibility"/>.
/// </summary>
/// <param name="value">The value to convert.</param>
/// <param name="options">The parameter, usually a string. For supported options, check the class constants starting with PARAM_.</param>
public static ScrollBarVisibility?Convert(object value, ref string options)
{
bool?boolValue = BoolToBoolConverter.Convert(value, ref options);
if (boolValue == null)
{
return(null);
}
if (!boolValue.Value)
{
return(ScrollBarVisibility.Disabled);
}
else
{
// options is already lowered in the BoolToBoolConverter
var trueEquivalent = GetTrueEquivalent(ref options, true);
return(trueEquivalent);
}
}
