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1 using System;
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2 using System.Collections;
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3 using System.Reflection;
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4 using System.ComponentModel;
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5
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6 using BLToolkit.TypeBuilder;
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7
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8 namespace BLToolkit.EditableObjects
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9 {
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10 [Serializable]
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11 public class /*struct*/ EditableObjectHolder : IEditable, IMemberwiseEditable, ISetParent, IPrintDebugState
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12 {
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13 public EditableObjectHolder(EditableObject obj)
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14 {
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15 _original = obj;
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16 _current = obj;
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17
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18 if (_current != null)
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19 _current.PropertyChanged += _current_PropertyChanged;
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20 }
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21
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22 void _current_PropertyChanged(object sender, PropertyChangedEventArgs e)
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23 {
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24 EditableObject obj = _parent as EditableObject;
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25
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26 if (obj != null)
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27 obj.OnPropertyChanged(_propertyInfo.Name + "." + e.PropertyName);
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28 }
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29
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30 private EditableObject _original;
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31 private EditableObject _current;
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32 private object _parent;
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33 private PropertyInfo _propertyInfo;
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34
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35 [GetValue, SetValue]
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36 public EditableObject Value
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37 {
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38 get { return _current; }
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39 set
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40 {
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41 if (_current != null)
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42 _current.PropertyChanged -= _current_PropertyChanged;
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43
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44 _current = value;
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45
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46 if (_current != null)
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47 _current.PropertyChanged += _current_PropertyChanged;
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48 }
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49 }
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50
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51 #region IEditable Members
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52
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53 public void AcceptChanges()
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54 {
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55 _original = _current;
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56
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57 if (_current != null)
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58 _current.AcceptChanges();
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59 }
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60
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61 public void RejectChanges()
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62 {
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63 _current = _original;
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64
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65 if (_current != null)
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66 _current.RejectChanges();
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67 }
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68
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69 public bool IsDirty
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70 {
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71 get
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72 {
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73 if (_current == null)
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74 return _original != null;
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75
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76 return _current != _original || _current.IsDirty;
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77 }
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78 }
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79
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80 #endregion
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81
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82 #region IMemberwiseEditable Members
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83
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84 public bool AcceptMemberChanges(PropertyInfo propertyInfo, string memberName)
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85 {
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86 if (memberName != propertyInfo.Name)
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87 return false;
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88
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89 AcceptChanges();
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90
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91 return true;
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92 }
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93
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94 public bool RejectMemberChanges(PropertyInfo propertyInfo, string memberName)
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95 {
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96 if (memberName != propertyInfo.Name)
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97 return false;
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98
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99 RejectChanges();
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100
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101 return true;
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102 }
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103
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104 public bool IsDirtyMember(PropertyInfo propertyInfo, string memberName, ref bool isDirty)
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105 {
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106 if (memberName != propertyInfo.Name)
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107 return false;
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108
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109 isDirty = IsDirty;
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110
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111 return true;
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112 }
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113
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114 public void GetDirtyMembers(PropertyInfo propertyInfo, ArrayList list)
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115 {
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116 if (IsDirty)
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117 list.Add(propertyInfo);
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118 }
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119
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120 #endregion
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121
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122 #region IPrintDebugState Members
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123
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124 public void PrintDebugState(PropertyInfo propertyInfo, ref string str)
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125 {
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126 str += string.Format("{0,-20} {1} {2,-40} {3,-40} \r\n",
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127 propertyInfo.Name, IsDirty? "*": " ", _original, _current);
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128 }
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129
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130 #endregion
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131
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132 #region ISetParent Members
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133
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134 public void SetParent(object parent, PropertyInfo propertyInfo)
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135 {
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136 _parent = parent;
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137 _propertyInfo = propertyInfo;
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138 }
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139
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140 #endregion
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141 }
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142 }
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