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                 public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
  49                 {
  50                         if (destinationType == typeof (Enum[]))
  51                                 return true;
  52
  53                         return base.CanConvertTo (context, destinationType);
  54                 }
  55
  56                 public int Compare(object a, object b) {
  57                         if (a is string && b is string) {
  58                                 return String.Compare((string) a, (string)b);
  59                         }
  60                         return String.Compare(a.ToString(), b.ToString());
  61                 }
  62
  63                 public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value) {
  64                         if (value is string) {
  65                                 string[]        keys;
  66                                 Keys            key;
  67
  68                                 keys = ((string)value).Split(new char[] {'+'});
  69                                 key = Keys.None;
  70
  71                                 if (keys.Length > 1) {
  72                                         for (int i = 0; i < keys.Length - 1; i++) {
  73                                                 if (keys[i].Equals("Ctrl")) {
  74                                                         key |= Keys.Control;
  75                                                 } else {
  76                                                         key |= (Keys)Enum.Parse(typeof(Keys), keys[i], true);
  77                                                 }
  78                                         }
  79                                 }
  80                                 if (keys [keys.Length - 1].Equals ("Ctrl"))
  81                                         key |= Keys.Control;
  82                                 else
  83                                         key |= (Keys)Enum.Parse(typeof(Keys), keys[keys.Length - 1], true);
  84                                 return key;
  85                         }
  86                         return base.ConvertFrom (context, culture, value);
  87                 }
  88
  89                 public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType) {
  90                         if (destinationType == typeof(string)) {
  91                                 StringBuilder   sb;
  92                                 Keys            key;
  93
  94                                 sb = new StringBuilder();
  95                                 key = (Keys)value;
  96
  97                                 // Modifiers first
  98                                 if ((key & Keys.Control) != 0) {
  99                                         sb.Append("Ctrl+");
 100                                 }
 101
 102                                 if ((key & Keys.Alt) != 0) {
 103                                         sb.Append("Alt+");
 104                                 }
 105
 106                                 if ((key & Keys.Shift) != 0) {
 107                                         sb.Append("Shift+");
 108                                 }
 109
 110                                 // Keycode last
 111                                 sb.Append(Enum.GetName(typeof(Keys), key & Keys.KeyCode));
 112
 113                                 return sb.ToString();
 114                         }
 115                         return base.ConvertTo (context, culture, value, destinationType);
 116                 }
 117
 118                 public override TypeConverter.StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) {
 119                         Keys [] stdVal = new Keys [] { Keys.D0, Keys.D1, Keys.D2, Keys.D3, Keys.D4, Keys.D5, Keys.D6, Keys.D7,
 120                         Keys.D8, Keys.D9, Keys.Alt, Keys.Back, Keys.Control, Keys.Delete, Keys.End, Keys.Return, Keys.F1,
 121                         Keys.F10, Keys.F11, Keys.F12, Keys.F2, Keys.F3, Keys.F4, Keys.F5, Keys.F6, Keys.F7, Keys.F8, Keys.F9,
 122                         Keys.Home, Keys.Insert, Keys.Next, Keys.PageUp, Keys.Shift };
 123
 124                         return new TypeConverter.StandardValuesCollection (stdVal);
 125                 }
 126
 127                 public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) {
 128
 129                         return false;
 130                 }
 131
 132                 public override bool GetStandardValuesSupported(ITypeDescriptorContext context) {
 133                         return true;
 134                 }
 135
 136                 #endregion      // Public Instance Methods
 137         }
 138 }