public override object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
if (values == null)
{
throw new ArgumentNullException(nameof(values));
}
switch (values.Length)
{
case 1:
var uniform = ConverterHelper.ConvertToDouble(values[0], culture);
return(new Thickness(uniform));
case 2:
var horizontal = ConverterHelper.ConvertToDouble(values[0], culture);
var vertical = ConverterHelper.ConvertToDouble(values[1], culture);
return(new Thickness(horizontal, vertical, horizontal, vertical));
case 4:
var left = ConverterHelper.ConvertToDouble(values[0], culture);
var top = ConverterHelper.ConvertToDouble(values[1], culture);
var right = ConverterHelper.ConvertToDouble(values[2], culture);
var bottom = ConverterHelper.ConvertToDouble(values[3], culture);
return(new Thickness(left, top, right, bottom));
default:
throw new ArgumentException($"Inconsistent number of parameters: expected 1, 2 or 4 values, got {values.Length}.", nameof(values));
}
}
/// <inheritdoc/>
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var doubleValue = ConverterHelper.ConvertToDouble(value, culture);
var doubleParameter = ConverterHelper.ConvertToDouble(parameter, culture);
return(System.Convert.ChangeType(Math.Max(doubleValue, doubleParameter), value?.GetType() ?? targetType));
}
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var doubleValue = ConverterHelper.ConvertToDouble(value, culture);
var doubleParameter = ConverterHelper.ConvertToDouble(parameter, culture);
return(Compare(doubleValue, doubleParameter));
}
/// <inheritdoc/>
public override object ConvertBack(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);
}
double param;
try
{
param = ConverterHelper.ConvertToDouble(parameter, culture);
}
catch (Exception exception)
{
throw new ArgumentException("The parameter of this converter must be convertible to a double.", exception);
}
if (Math.Abs(param) > double.Epsilon)
{
return(System.Convert.ChangeType(scalar / param, targetType));
}
return(DependencyProperty.UnsetValue);
}
/// <inheritdoc/>
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);
}
double param;
try
{
param = ConverterHelper.ConvertToDouble(parameter, culture);
}
catch (Exception exception)
{
throw new ArgumentException("The parameter of this converter must be convertible to a double.", exception);
}
return(System.Convert.ChangeType(scalar * param, targetType));
}
/// <inheritdoc/>
public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
var doubleValue = ConverterHelper.ConvertToDouble(value, culture);
var doubleParameter = ConverterHelper.ConvertToDouble(parameter, culture);
var result = doubleValue - doubleParameter;
return(System.Convert.ChangeType(result, targetType));
}
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 Size))
{
throw new ArgumentException("The parameter of this converter must be an instance of the Size structure. Use {sskk: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 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 {sskk: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 ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
var seconds = ConverterHelper.ConvertToDouble(value, culture);
return(TimeSpan.FromSeconds(seconds));
}