mcs/class/Managed.Windows.Forms/System.Windows.Forms/KeysConverter.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) 2005 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Peter Bartok    (pbartok@novell.com)
  24 //
  25 //
  26
  27 // COMPLETE
  28
  29 using System.Collections;
  30 using System.ComponentModel;
  31 using System.Text;
  32
  33 namespace System.Windows.Forms {
  34         public class KeysConverter : TypeConverter, IComparer {
  35                 #region Public Constructors
  36                 public KeysConverter() {
  37                 }
  38                 #endregion      // Public Constructors
  39
  40                 #region Public Instance Methods
  41                 public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
  42                         if (sourceType == typeof(string)) {
  43                                 return true;
  44                         }
  45                         return false;
  46                 }
  47
  48 #if NET_2_0
  49                 public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
  50                 {
  51                         if (destinationType == typeof (Enum[]))
  52                                 return true;
  53
  54                         return base.CanConvertTo (context, destinationType);
  55                 }
  56 #endif
  57
  58                 public int Compare(object a, object b) {
  59                         if (a is string && b is string) {
  60                                 return String.Compare((string) a, (string)b);
  61                         }
  62                         return String.Compare(a.ToString(), b.ToString());
  63                 }
  64
  65                 public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value) {
  66                         if (value is string) {
  67                                 string[]        keys;
  68                                 Keys            key;
  69
  70                                 keys = ((string)value).Split(new char[] {'+'});
  71                                 key = Keys.None;
  72
  73                                 if (keys.Length > 1) {
  74                                         for (int i = 0; i < keys.Length - 1; i++) {
  75                                                 if (keys[i].Equals("Ctrl")) {
  76                                                         key |= Keys.Control;
  77                                                 } else {
  78                                                         key |= (Keys)Enum.Parse(typeof(Keys), keys[i], true);
  79                                                 }
  80                                         }
  81                                 }
  82                                 if (keys [keys.Length - 1].Equals ("Ctrl"))
  83                                         key |= Keys.Control;
  84                                 else
  85                                         key |= (Keys)Enum.Parse(typeof(Keys), keys[keys.Length - 1], true);
  86                                 return key;
  87                         }
  88                         return base.ConvertFrom (context, culture, value);
  89                 }
  90
  91                 public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType) {
  92                         if (destinationType == typeof(string)) {
  93                                 StringBuilder   sb;
  94                                 Keys            key;
  95
  96                                 sb = new StringBuilder();
  97                                 key = (Keys)value;
  98
  99                                 // Modifiers first
 100                                 if ((key & Keys.Control) != 0) {
 101                                         sb.Append("Ctrl+");
 102                                 }
 103
 104                                 if ((key & Keys.Alt) != 0) {
 105                                         sb.Append("Alt+");
 106                                 }
 107
 108                                 if ((key & Keys.Shift) != 0) {
 109                                         sb.Append("Shift+");
 110                                 }
 111
 112                                 // Keycode last
 113                                 sb.Append(Enum.GetName(typeof(Keys), key & Keys.KeyCode));
 114
 115                                 return sb.ToString();
 116                         }
 117                         return base.ConvertTo (context, culture, value, destinationType);
 118                 }
 119
 120                 public override TypeConverter.StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) {
 121                         string [] stdVal = new string [] {
 122                                 "Alt", "Back", "Control", "Delete", "End", "Enter", "F1", "F10", "F11", "F12", "F2",
 123                                 "F3", "F4", "F5", "F6", "F7", "F8", "F9", "Home", "Insert", "Next", "Prior", "Shift"};
 124
 125                         return new TypeConverter.StandardValuesCollection (stdVal);
 126                 }
 127
 128                 public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) {
 129
 130                         return false;
 131                 }
 132
 133                 public override bool GetStandardValuesSupported(ITypeDescriptorContext context) {
 134                         return true;
 135                 }
 136
 137                 #endregion      // Public Instance Methods
 138         }
 139 }