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annotate Chronosv2/source/Presentation/Windows/Helpers/PasswordBoxHelper.cs @ 10:443821e55f06

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Initial cleaned up add from Codeplex files
author stevenh7776 stevenhollidge@hotmail.com
date Tue, 21 Feb 2012 17:25:44 +0700
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10
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1 using System.Windows;
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2 using System.Windows.Controls;
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3
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4 namespace Chronos.Presentation.Windows.Helpers
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5 {
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6 /// <summary>
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7 /// This class adds binding capabilities to the standard WPF PasswordBox.
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8 /// </summary>
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9 /// <remarks>
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10 /// http://www.codeproject.com/Articles/37167/Binding-Passwords.aspx
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11 /// </remarks>
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12 public static class PasswordBoxHelper
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13 {
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14 #region · Static Members ·
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15
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16 private static bool IsUpdating = false;
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17
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18 #endregion
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19
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20 #region · Attached Properties ·
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21
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22 /// <summary>
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23 /// BoundPassword Attached Dependency Property
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24 /// </summary>
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25 public static readonly DependencyProperty BoundPasswordProperty =
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26 DependencyProperty.RegisterAttached("BoundPassword",
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27 typeof(string),
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28 typeof(PasswordBoxHelper),
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29 new FrameworkPropertyMetadata(string.Empty, OnBoundPasswordChanged));
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30
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31 #endregion
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32
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33 #region · Attached Property Get/Set Methods ·
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34
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35 /// <summary>
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36 /// Gets the BoundPassword property.
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37 /// </summary>
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38 public static string GetBoundPassword(DependencyObject d)
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39 {
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40 return (string)d.GetValue(BoundPasswordProperty);
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41 }
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42
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43 /// <summary>
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44 /// Sets the BoundPassword property.
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45 /// </summary>
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46 public static void SetBoundPassword(DependencyObject d, string value)
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47 {
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48 d.SetValue(BoundPasswordProperty, value);
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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 · Attached Properties Callbacks ·
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54
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55 /// <summary>
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56 /// Handles changes to the BoundPassword property.
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57 /// </summary>
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58 private static void OnBoundPasswordChanged(
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59 DependencyObject d,
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60 DependencyPropertyChangedEventArgs e)
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61 {
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62 PasswordBox password = d as PasswordBox;
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63
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64 if (password != null)
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65 {
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66 // Disconnect the handler while we're updating.
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67 password.PasswordChanged -= PasswordChanged;
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68 }
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69
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70 if (e.NewValue != null)
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71 {
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72 if (!IsUpdating)
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73 {
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74 password.Password = e.NewValue.ToString();
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75 }
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76 }
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77 else
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78 {
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79 password.Password = string.Empty;
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80 }
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81
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82 // Now, reconnect the handler.
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83 password.PasswordChanged += new RoutedEventHandler(PasswordChanged);
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84 }
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85
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86 /// <summary>
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87 /// Handles the password change event.
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88 /// </summary>
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89 static void PasswordChanged(object sender, RoutedEventArgs e)
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90 {
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91 PasswordBox password = sender as PasswordBox;
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92 IsUpdating = true;
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93 SetBoundPassword(password, password.Password);
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94 IsUpdating = false;
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95 }
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96
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97 #endregion
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98 }
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99 }