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1 using System;
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2 using System.ComponentModel;
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3
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4 using BLToolkit.Reflection;
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5
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6 namespace BLToolkit.ComponentModel
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7 {
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8 public class ObjectHolder : ICustomTypeDescriptor
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9 {
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10 public ObjectHolder(object obj, ObjectBinder objectBinder)
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11 {
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12 _object = obj;
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13 _originalProperties = ((ITypedList)objectBinder).GetItemProperties(null);
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14 }
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15
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16 private readonly PropertyDescriptorCollection _originalProperties;
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17 private PropertyDescriptorCollection _customProperties;
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18
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19 private readonly object _object;
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20 public object Object
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21 {
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22 get { return _object; }
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23 }
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24
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25 private ICustomTypeDescriptor _customTypeDescriptor;
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26 private ICustomTypeDescriptor CustomTypeDescriptor
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27 {
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28 get
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29 {
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30 if (_customTypeDescriptor == null)
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31 {
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32 _customTypeDescriptor = _object is ICustomTypeDescriptor?
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33 (ICustomTypeDescriptor)_object:
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34 TypeAccessor.GetCustomTypeDescriptor(_object.GetType());
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35 }
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36
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37 return _customTypeDescriptor;
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38 }
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39 }
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40
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41 #region ICustomTypeDescriptor Members
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42
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43 AttributeCollection ICustomTypeDescriptor.GetAttributes()
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44 {
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45 return CustomTypeDescriptor.GetAttributes();
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46 }
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47
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48 string ICustomTypeDescriptor.GetClassName()
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49 {
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50 return CustomTypeDescriptor.GetClassName();
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51 }
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52
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53 string ICustomTypeDescriptor.GetComponentName()
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54 {
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55 return CustomTypeDescriptor.GetComponentName();
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56 }
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57
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58 TypeConverter ICustomTypeDescriptor.GetConverter()
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59 {
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60 return CustomTypeDescriptor.GetConverter();
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61 }
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62
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63 EventDescriptor ICustomTypeDescriptor.GetDefaultEvent()
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64 {
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65 return CustomTypeDescriptor.GetDefaultEvent();
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66 }
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67
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68 PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty()
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69 {
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70 return CustomTypeDescriptor.GetDefaultProperty();
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71 }
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72
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73 object ICustomTypeDescriptor.GetEditor(Type editorBaseType)
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74 {
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75 return CustomTypeDescriptor.GetEditor(editorBaseType);
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76 }
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77
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78 EventDescriptorCollection ICustomTypeDescriptor.GetEvents(Attribute[] attributes)
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79 {
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80 return CustomTypeDescriptor.GetEvents(attributes);
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81 }
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82
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83 EventDescriptorCollection ICustomTypeDescriptor.GetEvents()
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84 {
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85 return CustomTypeDescriptor.GetEvents();
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86 }
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87
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88 PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties(Attribute[] attributes)
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89 {
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90 if (_customProperties == null)
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91 {
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92 PropertyDescriptor[] properties = new PropertyDescriptor[_originalProperties.Count];
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93
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94 for (int i = 0; i < properties.Length; i++)
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95 {
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96 properties[i] = new ObjectPropertyDescriptor(_originalProperties[i]);
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97 }
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98
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99 _customProperties = new PropertyDescriptorCollection(properties);
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100 }
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101
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102 return _customProperties;
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103 }
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104
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105 PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties()
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106 {
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107 return ((ICustomTypeDescriptor)this).GetProperties(null);
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108 }
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109
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110 object ICustomTypeDescriptor.GetPropertyOwner(PropertyDescriptor pd)
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111 {
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112 return CustomTypeDescriptor.GetPropertyOwner(pd);
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113 }
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114
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115 #endregion
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116
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117 #region ObjectPropertyDescriptor
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118
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119 class ObjectPropertyDescriptor : PropertyDescriptorWrapper
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120 {
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121 public ObjectPropertyDescriptor(PropertyDescriptor pd)
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122 : base(pd)
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123 {
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124 }
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125
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126 public override object GetValue(object component)
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127 {
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128 return base.GetValue(((ObjectHolder)component).Object);
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129 }
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130
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131 public override void SetValue(object component, object value)
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132 {
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133 base.SetValue(((ObjectHolder)component).Object, value);
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134 }
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135 }
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136
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137 #endregion
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138 }
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139 }
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