4756d353f981c1a0fb7b7396b702556b29f38e31
[mono.git] / 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
27 // COMPLETE
28
29 using System.Drawing;
30 using System.ComponentModel;
31 using System.Collections;
32 using System.Diagnostics;
33 using System.Globalization;
34 using System.Runtime.InteropServices;
35
36 namespace System.Windows.Forms
37 {
38         public class ImageIndexConverter : Int32Converter
39         {
40                 #region Constructors
41
42                 public ImageIndexConverter () { }
43
44                 #endregion Constructors
45
46                 #region Protected Properties
47
48                 protected virtual bool IncludeNoneAsStandardValue {
49                         get { return true; }
50                 }
51
52                 #endregion Protected Properties
53
54                 #region Public Methods
55
56                 public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
57                 {
58                         string indexStr;
59                         if (value != null && value is string) {
60                                 indexStr = (string) value;
61                                 if (indexStr == "(none)")
62                                         return -1;
63                                 else
64                                         return Int32.Parse (indexStr);
65                         }
66                         else
67                                 return base.ConvertFrom (context, culture, value);
68                 }
69
70                 public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture,
71                                                   object value, Type destinationType)
72                 {
73                         if (value != null && destinationType == typeof (string)) {
74                                 if (value is int && (int) value == -1)
75                                         return "(none)";
76                                 else
77                                         return value.ToString ();
78                         }
79                         else
80                                 return base.ConvertTo (context, culture, value, destinationType);
81                 }
82
83                 public override StandardValuesCollection GetStandardValues (ITypeDescriptorContext context)
84                 {
85                         int [] stdVal = new int [] {-1};
86                         return new TypeConverter.StandardValuesCollection (stdVal);
87                 }
88
89                 public override bool GetStandardValuesExclusive (ITypeDescriptorContext context)
90                 {
91                         return false;
92                 }
93
94                 public override bool GetStandardValuesSupported (ITypeDescriptorContext context)
95                 {
96                         return true;
97                 }
98
99                 #endregion Public Methods
100         }
101 }