static GridUnitType ConvertibleKindToGridUnitType(ConvertibleKind kind)
{
Contract.Requires((int)kind >= ConvertibleKind_GridUnitFirst);
Contract.Requires((int)kind <= ConvertibleKind_GridUnitLast);
Contract.Ensures((int)Contract.Result <GridUnitType>() >= GridUnitType_First);
Contract.Ensures((int)Contract.Result <GridUnitType>() <= GridUnitType_Last);
return((GridUnitType)((int)kind - ConvertibleKind_GridUnitFirst + GridUnitType_First));
}
static GridUnitType ConvertibleKindToGridUnitType(ConvertibleKind kind)
{
Contract.Requires((int)kind >= ConvertibleKind_GridUnitFirst);
Contract.Requires((int)kind <= ConvertibleKind_GridUnitLast);
Contract.Ensures((int)Contract.Result<GridUnitType>() >= GridUnitType_First);
Contract.Ensures((int)Contract.Result<GridUnitType>() <= GridUnitType_Last);
return (GridUnitType)((int)kind - ConvertibleKind_GridUnitFirst + GridUnitType_First);
}
static object FromIConvertible(double value, ConvertibleKind kind)
{
switch (kind)
{
case ConvertibleKind.OneWay:
return value;
case ConvertibleKind.GridUnitAuto:
case ConvertibleKind.GridUnitPixel:
case ConvertibleKind.GridUnitStar:
return new GridLength(value, ConvertibleKindToGridUnitType(kind));
default:
throw new ArgumentOutOfRangeException("kind");
}
}
static object FromIConvertible(double value, ConvertibleKind kind)
{
switch (kind)
{
case ConvertibleKind.OneWay:
return(value);
case ConvertibleKind.GridUnitAuto:
case ConvertibleKind.GridUnitPixel:
case ConvertibleKind.GridUnitStar:
return(new GridLength(value, ConvertibleKindToGridUnitType(kind)));
default:
throw new ArgumentOutOfRangeException("kind");
}
}
static IConvertible ToIConvertible(object obj, IFormatProvider provider, out ConvertibleKind kind)
{
kind = ConvertibleKind.OneWay;
if (obj == null)
{
return(null);
}
try
{
var convertible = obj as IConvertible;
if (convertible != null)
{
return(convertible);
}
if (obj is GridLength)
{
var gl = (GridLength)obj;
kind = GridUnitTypeToConvertibleKind(gl.GridUnitType);
return(gl.Value);
}
var formattable = obj as IFormattable;
if (formattable != null)
{
return(formattable.ToString(null, provider));
}
return(obj.ToString());
}
catch
{
return(null);
}
}
static IConvertible ToIConvertible(object obj, IFormatProvider provider, out ConvertibleKind kind)
{
kind = ConvertibleKind.OneWay;
if (obj == null)
return null;
try
{
var convertible = obj as IConvertible;
if (convertible != null)
return convertible;
if (obj is GridLength)
{
var gl = (GridLength)obj;
kind = GridUnitTypeToConvertibleKind(gl.GridUnitType);
return gl.Value;
}
var formattable = obj as IFormattable;
if (formattable != null)
return formattable.ToString(null, provider);
return obj.ToString();
}
catch
{
return null;
}
}
