/// <inheritdoc/>
public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
var collection = parameter as IList;
if (collection == null)
{
return(null);
}
var index = ConverterHelper.ConvertToInt32(value ?? -1, culture);
if (index < 0 || index >= collection.Count)
{
return(null);
}
return(collection[index]);
}
public override object Convert([NotNull] object[] values, Type targetType, object parameter, CultureInfo culture)
{
if (values.Length < 2)
{
throw new InvalidOperationException("This multi converter must be invoked with at least two elements");
}
var result = 1.0;
try
{
result = values.Select(x => ConverterHelper.ConvertToDouble(x, culture)).Aggregate(result, (current, next) => current * next);
}
catch (Exception exception)
{
throw new ArgumentException("The values of this converter must be convertible to a double.", exception);
}
return(result);
}
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
double scalar;
try
{
scalar = ConverterHelper.ConvertToDouble(value, culture);
}
catch (Exception exception)
{
throw new ArgumentException("The value of this converter must be convertible to a double.", exception);
}
if (!(parameter is Thickness))
{
throw new ArgumentException("The parameter of this converter must be an instance of the Thickness structure. Use {sd:Thickness (arguments)} to construct one.");
}
var thickness = (Thickness)parameter;
var result = new Thickness(thickness.Left * scalar, thickness.Top * scalar, thickness.Right * scalar, thickness.Bottom * scalar);
return(result);
}
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
double scalar;
try
{
scalar = ConverterHelper.ConvertToDouble(value, culture);
}
catch (Exception exception)
{
throw new ArgumentException("The value of this converter must be convertible to a double.", exception);
}
if (!(parameter is Size))
{
throw new ArgumentException("The parameter of this converter must be an instance of the Size structure. Use {sd:Size (arguments)} to construct one.");
}
var size = (Size)parameter;
var result = new Size(size.Width * scalar, size.Height * scalar);
return(result);
}
/// <inheritdoc/>
public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
var doubleValue = targetType == typeof(AngleSingle) ? ConverterHelper.ConvertToDouble(value, culture) : ConverterHelper.TryConvertToDouble(value, culture);
return(doubleValue != null ? (object)new AngleSingle((float)doubleValue.Value, AngleType.Degree) : null);
}
/// <inheritdoc/>
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return(targetType == typeof(double) ? ConverterHelper.ConvertToAngleSingle(value, culture).Degrees : ConverterHelper.TryConvertToAngleSingle(value, culture)?.Degrees);
}
/// <inheritdoc/>
public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return(targetType.IsValueType && !targetType.IsNullable() ? ConverterHelper.ChangeType(value, targetType, culture) : ConverterHelper.TryChangeType(value, targetType, culture));
}
/// <inheritdoc/>
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var result = ConverterHelper.ConvertToBoolean(value, culture);
return(result ? parameter : DependencyProperty.UnsetValue);
}
/// <inheritdoc/>
public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return(targetType == typeof(char) ? ConverterHelper.ConvertToChar(value, culture) : ConverterHelper.TryConvertToChar(value, culture));
}
/// <inheritdoc/>
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return(targetType == typeof(int) ? ConverterHelper.ConvertToInt32(value, culture) : ConverterHelper.TryConvertToInt32(value, culture));
}
/// <inheritdoc/>
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var result = !ConverterHelper.ConvertToBoolean(value, culture);
return(result.Box());
}
/// <inheritdoc/>
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return targetType == typeof(double) ? ConverterHelper.ConvertToDouble(value, culture) : ConverterHelper.TryConvertToDouble(value, culture);
}
/// <inheritdoc/>
public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
var doubleValue = targetType == typeof(TimeSpan) ? ConverterHelper.ConvertToDouble(value, culture) : ConverterHelper.TryConvertToDouble(value, culture);
return(doubleValue != null ? (object)TimeSpan.FromSeconds(doubleValue.Value) : null);
}
/// <inheritdoc/>
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return(targetType == typeof(double) ? ConverterHelper.ConvertToTimeSpan(value, culture).TotalSeconds : ConverterHelper.TryConvertToTimeSpan(value, culture)?.TotalSeconds);
}