mcs/class/Managed.Windows.Forms/System.Windows.Forms/ImageIndexConverter.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2004 Novell, Inc.
  21 //
  22 // Authors:
  23 //      Ravindra        rkumar@novell.com
  24 //
  25 //
  26 // $Revision: 1.1 $
  27 // $Modtime: $
  28 // $Log: ImageIndexConverter.cs,v $
  29 // Revision 1.1  2004/08/27 22:07:37  ravindra
  30 // Implemented.
  31 //
  32
  33 // COMPLETE
  34
  35 using System.Drawing;
  36 using System.ComponentModel;
  37 using System.Collections;
  38 using System.Diagnostics;
  39 using System.Globalization;
  40 using System.Runtime.InteropServices;
  41
  42 namespace System.Windows.Forms
  43 {
  44         public class ImageIndexConverter : Int32Converter
  45         {
  46                 #region Constructors
  47
  48                 public ImageIndexConverter () { }
  49
  50                 #endregion Constructors
  51
  52                 #region Protected Properties
  53
  54                 protected virtual bool IncludeNoneAsStandardValue {
  55                         get { return true; }
  56                 }
  57
  58                 #endregion Protected Properties
  59
  60                 #region Public Methods
  61
  62                 public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
  63                 {
  64                         string indexStr;
  65                         if (value != null && value is string) {
  66                                 indexStr = (string) value;
  67                                 return Int32.Parse (indexStr);
  68                         }
  69                         else
  70                                 return base.ConvertFrom (context, culture, value);
  71                 }
  72
  73                 public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture,
  74                                                   object value, Type destinationType)
  75                 {
  76                         if (value != null && destinationType == typeof (string)) {
  77                                 if (value is int && (int) value == -1)
  78                                         return "(none)";
  79                                 else
  80                                         return value.ToString ();
  81                         }
  82                         else
  83                                 return base.ConvertTo (context, culture, value, destinationType);
  84                 }
  85
  86                 public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
  87                 {
  88                         int [] stdVal = new int [] {-1};
  89                         return new TypeConverter.StandardValuesCollection (stdVal);
  90                 }
  91
  92                 public override bool GetStandardValuesExclusive (ITypeDescriptorContext context)
  93                 {
  94                         return false;
  95                 }
  96
  97                 public override bool GetStandardValuesSupported (ITypeDescriptorContext context)
  98                 {
  99                         return true;
 100                 }
 101
 102                 #endregion Public Methods
 103         }
 104 }