mcs/class/WindowsBase/System.Windows/DependencyObject.cs

   1 //
   2 // DependencyObject.cs
   3 //
   4 // Author:
   5 //   Iain McCoy (iain@mccoy.id.au)
   6 //
   7 // (C) 2005 Iain McCoy
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System.Collections;
  30
  31 namespace System.Windows {
  32         public class DependencyObject {
  33                 private static Hashtable propertyDeclarations = new Hashtable();
  34                 private Hashtable properties = new Hashtable();
  35
  36                 private DependencyObjectType dependencyObjectType;
  37                 public DependencyObjectType DependencyObjectType {
  38                         get { return dependencyObjectType; }
  39                 }
  40
  41                 [MonoTODO()]
  42                 public void ClearValue(DependencyProperty dp)
  43                 {
  44                         throw new NotImplementedException("ClearValue(DependencyProperty dp)");
  45                 }
  46
  47                 [MonoTODO()]
  48                 public void ClearValue(DependencyPropertyKey key)
  49                 {
  50                         throw new NotImplementedException("ClearValue(DependencyPropertyKey key)");
  51                 }
  52
  53                 [MonoTODO()]
  54                 public LocalValueEnumerator GetLocalValueEnumerator()
  55                 {
  56                         return new LocalValueEnumerator(properties);
  57                 }
  58
  59                 public object GetValue(DependencyProperty dp)
  60                 {
  61                         object val = properties[dp];
  62                         if (val == null)
  63                                 val = dp.DefaultMetadata.DefaultValue;
  64                         return val;
  65                 }
  66
  67                 [MonoTODO()]
  68                 public object GetValueBase(DependencyProperty dp)
  69                 {
  70                         throw new NotImplementedException("GetValueBase(DependencyProperty dp)");
  71                 }
  72
  73                 [MonoTODO()]
  74                 protected virtual object GetValueCore(DependencyProperty dp, object baseValue, PropertyMetadata metadata)
  75                 {
  76                         throw new NotImplementedException("GetValueCore(DependencyProperty dp, object baseValue, PropertyMetadata metadata)");
  77                 }
  78
  79                 [MonoTODO()]
  80                 public void InvalidateProperty(DependencyProperty dp)
  81                 {
  82                         throw new NotImplementedException("InvalidateProperty(DependencyProperty dp)");
  83                 }
  84
  85                 [MonoTODO()]
  86                 protected virtual void OnPropertyInvalidated(DependencyProperty dp, PropertyMetadata metadata)
  87                 {
  88                         throw new NotImplementedException("OnPropertyInvalidated(DependencyProperty dp, PropertyMetadata metadata)");
  89                 }
  90
  91                 [MonoTODO()]
  92                 public object ReadLocalValue(DependencyProperty dp)
  93                 {
  94                         throw new NotImplementedException("ReadLocalValue(DependencyProperty dp)");
  95                 }
  96
  97                 public void SetValue(DependencyProperty dp, object value)
  98                 {
  99
 100                         ValidateValueCallback validate = dp.ValidateValueCallback;
 101                         if (validate != null && !validate(value))
 102                                 throw new Exception("Value does not validate");
 103                         else
 104                                 properties[dp] = value;
 105                 }
 106
 107                 [MonoTODO()]
 108                 public void SetValue(DependencyPropertyKey key, object value)
 109                 {
 110                         throw new NotImplementedException("SetValue(DependencyPropertyKey key, object value)");
 111                 }
 112
 113                 [MonoTODO()]
 114                 public void SetValueBase(DependencyProperty dp, object value)
 115                 {
 116                         throw new NotImplementedException("SetValueBase(DependencyProperty dp, object value)");
 117                 }
 118
 119                 [MonoTODO()]
 120                 public void SetValueBase(DependencyPropertyKey key, object value)
 121                 {
 122                         throw new NotImplementedException("SetValueBase(DependencyPropertyKey key, object value)");
 123                 }
 124
 125                 internal static DependencyProperty lookup(Type t, string name)
 126                 {
 127                         return (DependencyProperty)((Hashtable)propertyDeclarations[t])[name];
 128                 }
 129
 130                 internal static void register(Type t, DependencyProperty dp)
 131                 {
 132                         if (propertyDeclarations[t] == null)
 133                                 propertyDeclarations[t] = new Hashtable();
 134                         Hashtable typeDeclarations = (Hashtable)propertyDeclarations[t];
 135                         if (!typeDeclarations.ContainsKey(dp.Name))
 136                                 typeDeclarations[dp.Name] = dp;
 137                         else
 138                                 throw new Exception("A property named " + dp.Name + " already exists on " + t.Name);
 139                 }
 140         }
 141 }