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//
// System.ComponentModel.EnumConverter.cs
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
// Andreas Nahr (ClassDevelopment@A-SoftTech.com)
//
// (C) 2002 Ximian, Inc (http://www.ximian.com)
// (C) 2003 Andreas Nahr
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections;
using System.Globalization;
using System.Reflection;
using System.ComponentModel.Design.Serialization;
namespace System.ComponentModel
{
public class EnumConverter : TypeConverter
{
private Type type;
private StandardValuesCollection stdValues;
public EnumConverter (Type type)
{
this.type = type;
}
public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
{
if (destinationType == typeof (InstanceDescriptor))
return true;
return base.CanConvertTo (context, destinationType);
}
public override object ConvertTo (ITypeDescriptorContext context,
CultureInfo culture,
object value,
Type destinationType)
{
if (destinationType == typeof (string))
if (value != null)
return Enum.Format (type, value, "G");
if (destinationType == typeof (InstanceDescriptor) && type.IsInstanceOfType (value)) {
FieldInfo f = type.GetField (value.ToString ());
if (f == null) throw new ArgumentException (string.Format ("The value '{0}' is not a valid value for the enum '{1}'", value, type));
return new InstanceDescriptor (f, null);
}
return base.ConvertTo (context, culture, value, destinationType);
}
public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
{
if (sourceType == typeof (string))
return true;
return base.CanConvertFrom (context, sourceType);
}
public override object ConvertFrom (ITypeDescriptorContext context,
CultureInfo culture,
object value)
{
string val = value as string;
if (val == null)
return base.ConvertFrom(context, culture, value);
return Enum.Parse (type, val, true);
}
public override bool IsValid (ITypeDescriptorContext context, object value)
{
return Enum.IsDefined (type, value);
}
public override bool GetStandardValuesSupported (ITypeDescriptorContext context)
{
return true;
}
public override bool GetStandardValuesExclusive (ITypeDescriptorContext context)
{
return !(type.IsDefined (typeof (FlagsAttribute), false));
}
public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
{
if (stdValues == null) {
Array values = Enum.GetValues (type);
Array.Sort (values);
stdValues = new StandardValuesCollection (values);
}
return stdValues;
}
protected virtual IComparer Comparer {
get { return new EnumConverter.EnumComparer (); }
}
protected Type EnumType {
get { return type; }
}
protected TypeConverter.StandardValuesCollection Values {
get { return stdValues; }
set { stdValues = value; }
}
private class EnumComparer : IComparer
{
int IComparer.Compare (object compareObject1, object compareObject2)
{
string CompareString1 = (compareObject1 as string);
string CompareString2 = (compareObject2 as string);
if ((CompareString1 == null) || (CompareString2 == null))
return Collections.Comparer.Default.Compare (compareObject1, compareObject2);
return CultureInfo.InvariantCulture.CompareInfo.Compare (CompareString1, CompareString2);
}
}
}
}
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