1 // Permission is hereby granted, free of charge, to any person obtaining
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2 // a copy of this software and associated documentation files (the
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3 // "Software"), to deal in the Software without restriction, including
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4 // without limitation the rights to use, copy, modify, merge, publish,
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5 // distribute, sublicense, and/or sell copies of the Software, and to
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6 // permit persons to whom the Software is furnished to do so, subject to
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7 // the following conditions:
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9 // The above copyright notice and this permission notice shall be
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10 // included in all copies or substantial portions of the Software.
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12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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20 // Copyright (c) 2007 Novell, Inc.
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23 // Jonathan Pobst monkey@jpobst.com
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27 using System.Drawing;
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28 using System.ComponentModel;
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29 using System.Collections;
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30 using System.Diagnostics;
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31 using System.Globalization;
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32 using System.Runtime.InteropServices;
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34 namespace System.Windows.Forms
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36 public class ImageKeyConverter : StringConverter
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38 #region Constructors
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39 public ImageKeyConverter () { }
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40 #endregion Constructors
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42 #region Protected Properties
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43 protected virtual bool IncludeNoneAsStandardValue {
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44 get { return true; }
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46 #endregion Protected Properties
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48 #region Public Methods
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49 public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
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51 if (sourceType == typeof (string))
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57 public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
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59 if (value != null && value is string)
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60 return (string) value;
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62 return base.ConvertFrom (context, culture, value);
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65 public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture,
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66 object value, Type destinationType)
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70 else if (destinationType == typeof (string)) {
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71 if (value is string && (string) value == string.Empty)
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74 return value.ToString ();
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77 return base.ConvertTo (context, culture, value, destinationType);
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80 public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
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82 string[] stdVal = new string[] { string.Empty };
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83 return new TypeConverter.StandardValuesCollection (stdVal);
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86 public override bool GetStandardValuesExclusive (ITypeDescriptorContext context)
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91 public override bool GetStandardValuesSupported (ITypeDescriptorContext context)
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95 #endregion Public Methods
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