Opentk/Source/OpenTK/IconConverter.cs

//
// System.Drawing.IconConverter.cs
//
// Authors:
//   Dennis Hayes (dennish@Raytek.com)
//   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
//   Sanjay Gupta (gsanjay@novell.com)
//
// (C) 2002 Ximian, Inc
//

//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// 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.ComponentModel;
using System.Globalization;
using System.IO;

namespace OpenTK
{
#if EXPERIMENTAL
    /// <summary>
    /// Summary description for IconConverter.
    /// </summary>
    public class IconConverter : ExpandableObjectConverter
    {
        public IconConverter()
        {
        }

        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            if (sourceType == typeof(System.Byte[]))
                return true;
            else
                return false;
        }

        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
        {
            if ((destinationType == typeof(System.Byte[])) || (destinationType == typeof(System.String)))
                return true;
            else
                return false;
        }

        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            byte[] bytes = value as byte[];
            if (bytes == null)
                return base.ConvertFrom(context, culture, value);
            
            MemoryStream ms = new MemoryStream(bytes);
            
            return new Icon(ms);
        }

        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            if ((value is Icon) && (destinationType == typeof(string)))
                return value.ToString(); else if (value == null && destinationType == typeof(string))
                return "(none)"; else if (CanConvertTo(null, destinationType))
            {
                //came here means destType is byte array ;
                MemoryStream ms = new MemoryStream();
                ((Icon)value).Save(ms);
                return ms.GetBuffer();
            } else
                return new NotSupportedException("IconConverter can not convert from " + value.GetType());
        }
    }
#endif
}