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annotate Chronosv2/source/Presentation/ViewModel/PropertyState.cs @ 10:443821e55f06

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author stevenh7776 stevenhollidge@hotmail.com
date Tue, 21 Feb 2012 17:25:44 +0700
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1 /*
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2 The MIT License
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3
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4 Copyright (c) 2009-2010. Carlos Guzmán Álvarez. http://chronoswpf.codeplex.com/
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5
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6 Permission is hereby granted, free of charge, to any person obtaining a copy
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7 of this software and associated documentation files (the "Software"), to deal
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8 in the Software without restriction, including without limitation the rights
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9 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 copies of the Software, and to permit persons to whom the Software is
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11 furnished to do so, subject to the following conditions:
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12
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13 The above copyright notice and this permission notice shall be included in
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14 all copies or substantial portions of the Software.
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15
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16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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19 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 THE SOFTWARE.
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23 */
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24
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25 using System;
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26 using System.ComponentModel;
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27 using System.Linq.Expressions;
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28
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29 namespace Chronos.Presentation.ViewModel
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30 {
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31 /// <summary>
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32 /// Represents a property state
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33 /// </summary>
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34 /// <typeparam name="T"></typeparam>
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35 public sealed class PropertyState<T>
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36 : ObservableObject where T: class
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37 {
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38 #region · PropertyChangedEventArgs Cached Instances ·
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39
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40 private static readonly PropertyChangedEventArgs IsEditableChangedArgs = CreateArgs<PropertyState<T>>(x => x.IsEditable);
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41 private static readonly PropertyChangedEventArgs IsReadOnlyChangedArgs = CreateArgs<PropertyState<T>>(x => x.IsReadOnly);
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42
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43 #endregion
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44
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45 #region · Fields ·
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46
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47 private string name;
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48 private bool isEditable;
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49
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50 #endregion
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51
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52 #region · Properties ·
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53
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54 /// <summary>
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55 /// Gets the property name
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56 /// </summary>
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57 public string PropertyName
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58 {
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59 get { return this.name; }
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60 }
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61
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62 /// <summary>
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63 /// Gets or sets a value that indicates whether the property is editable
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64 /// </summary>
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65 public bool IsEditable
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66 {
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67 get { return this.isEditable; }
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68 set
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69 {
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70 this.isEditable = value;
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71 this.NotifyPropertyChanged(IsEditableChangedArgs);
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72 this.NotifyPropertyChanged(IsReadOnlyChangedArgs);
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73 }
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74 }
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75
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76 /// <summary>
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77 /// Gets or sets a value that indicates whether the property is readonly
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78 /// </summary>
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79 public bool IsReadOnly
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80 {
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81 get { return !this.isEditable; }
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82 }
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83
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84 #endregion
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85
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86 #region · Constructors ·
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87
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88 /// <summary>
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89 /// Initializes a new instance of the <see cref="PropertyState&lt;T&gt;"/> class.
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90 /// </summary>
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91 /// <param name="propertyName">Name of the property.</param>
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92 public PropertyState(string propertyName)
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93 {
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94 this.name = propertyName;
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95 }
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96
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97 /// <summary>
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98 /// Initializes a new instance of the <see cref="PropertyState&lt;T&gt;"/> class.
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99 /// </summary>
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100 /// <param name="propertyExpression">The property expression.</param>
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101 public PropertyState(Expression<Func<T, object>> propertyExpression)
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102 {
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103 this.name = propertyExpression.GetPropertyName();
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104 }
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105
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106 #endregion
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107 }
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108 }