/// <summary>
/// Converts a value.
/// </summary>
/// <param name="value">The value produced by the binding source.</param>
/// <param name="targetType">The type of the binding target property.</param>
/// <param name="parameter">The converter parameter to use.</param>
/// <param name="culture">The culture to use in the converter.</param>
/// <returns>
/// A converted value. If the method returns null, the valid null value is used.
/// </returns>
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (_visibilityConverter == null)
{
_visibilityConverter = new VisibilityConverter();
}
return((Visibility)_visibilityConverter.Convert(value, targetType, parameter, culture) == Visibility.Visible);
}
/// <summary>
/// Converts source values to a value for the binding target. The data binding engine calls this method when it propagates the values from source bindings to the binding target.
/// </summary>
/// <param name="values">The array of values that the source bindings in the <see cref="T:System.Windows.Data.MultiBinding"/> produces. The value <see cref="F:System.Windows.DependencyProperty.UnsetValue"/> indicates that the source binding has no value to provide for conversion.</param>
/// <param name="targetType">The type of the binding target property.</param>
/// <param name="parameter">The converter parameter to use.</param>
/// <param name="culture">The culture to use in the converter.</param>
/// <returns>
/// A converted value.
/// If the method returns null, the valid null value is used.
/// A return value of <see cref="T:System.Windows.DependencyProperty"/>.<see cref="F:System.Windows.DependencyProperty.UnsetValue"/> indicates that the converter did not produce a value, and that the binding will use the <see cref="P:System.Windows.Data.BindingBase.FallbackValue"/> if it is available, or else will use the default value.
/// A return value of <see cref="T:System.Windows.Data.Binding"/>.<see cref="F:System.Windows.Data.Binding.DoNothing"/> indicates that the binding does not transfer the value or use the <see cref="P:System.Windows.Data.BindingBase.FallbackValue"/> or the default value.
/// </returns>
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
if (_visibilityConverter == null)
{
_visibilityConverter = new VisibilityConverter();
}
List <Visibility> converted =
(from v in values
where v != DependencyProperty.UnsetValue
select(Visibility) _visibilityConverter.Convert(v, targetType, null, culture))
.ToList();
Visibility output = converted.Contains(Visibility.Visible) ? Visibility.Visible : Visibility.Collapsed;
if (parameter != null)
{
output = output == Visibility.Visible ? Visibility.Collapsed : Visibility.Visible;
}
return(output);
}