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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
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5 using BLToolkit.TypeBuilder;
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6
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7 namespace BLToolkit.EditableObjects
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8 {
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9 [Serializable]
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10 public struct EditableValue<T>: IEditable, IMemberwiseEditable, IPrintDebugState
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11 {
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12 private T _original;
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13 private T _current;
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14
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15 public EditableValue(T value)
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16 {
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17 _original = value;
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18 _current = value;
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19 }
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20
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21 [GetValue, SetValue]
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22 public T Value
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23 {
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24 get { return _current; }
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25 set { _current = value; }
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26 }
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27
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28 #region IEditable Members
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29
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30 public void AcceptChanges()
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31 {
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32 _original = _current;
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33 }
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34
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35 public void RejectChanges()
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36 {
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37 _current = _original;
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38 }
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39
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40 public bool IsDirty
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41 {
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42 get
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43 {
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44 object o = _original;
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45 object c = _current;
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46
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47 return o == null? c != null: o.Equals(c) == false;
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48 }
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49 }
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50
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51 #endregion
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52
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53 #region IMemberwiseEditable Members
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54
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55 public bool AcceptMemberChanges(PropertyInfo propertyInfo, string memberName)
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56 {
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57 if (memberName != propertyInfo.Name)
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58 return false;
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59
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60 AcceptChanges();
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61
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62 return true;
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63 }
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64
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65 public bool RejectMemberChanges(PropertyInfo propertyInfo, string memberName)
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66 {
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67 if (memberName != propertyInfo.Name)
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68 return false;
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69
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70 RejectChanges();
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71
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72 return true;
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73 }
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74
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75 public bool IsDirtyMember(PropertyInfo propertyInfo, string memberName, ref bool isDirty)
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76 {
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77 if (memberName != propertyInfo.Name)
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78 return false;
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79
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80 isDirty = IsDirty;
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81
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82 return true;
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83 }
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84
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85 public void GetDirtyMembers(PropertyInfo propertyInfo, ArrayList list)
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86 {
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87 if (IsDirty)
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88 list.Add(propertyInfo);
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89 }
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90
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91 #endregion
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92
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93 #region IPrintDebugState Members
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94
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95 public void PrintDebugState(PropertyInfo propertyInfo, ref string str)
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96 {
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97 str += string.Format("{0,-20} {1} {2,-40} {3,-40} \r\n",
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98 propertyInfo.Name, IsDirty? "*": " ", _original, _current);
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99 }
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100
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101 #endregion
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102 }
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103 }
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