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// 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.
//
// Copyright (c) 2007 Novell, Inc.
//
// Authors:
// Jonathan Pobst monkey@jpobst.com
//
using System.Drawing;
using System.ComponentModel;
using System.Collections;
using System.Diagnostics;
using System.Globalization;
using System.Runtime.InteropServices;
namespace System.Windows.Forms
{
public class ImageKeyConverter : StringConverter
{
#region Constructors
public ImageKeyConverter () { }
#endregion Constructors
#region Protected Properties
protected virtual bool IncludeNoneAsStandardValue {
get { return true; }
}
#endregion Protected Properties
#region Public Methods
public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
{
if (sourceType == typeof (string))
return true;
return false;
}
public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value != null && value is string)
return (string) value;
else
return base.ConvertFrom (context, culture, value);
}
public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture,
object value, Type destinationType)
{
if (value == null)
return "(none)";
else if (destinationType == typeof (string)) {
if (value is string && (string) value == string.Empty)
return "(none)";
else
return value.ToString ();
}
else
return base.ConvertTo (context, culture, value, destinationType);
}
public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
{
string[] stdVal = new string[] { string.Empty };
return new TypeConverter.StandardValuesCollection (stdVal);
}
public override bool GetStandardValuesExclusive (ITypeDescriptorContext context)
{
return true;
}
public override bool GetStandardValuesSupported (ITypeDescriptorContext context)
{
return true;
}
#endregion Public Methods
}
}
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