New try for LoginDialog Password Preview Feature

MahApps.Metro/Behaviours/PasswordBoxBindingBehavior.cs

@@ -0,0 +1,72 @@
+//	--------------------------------------------------------------------
+//		Obtained from: WPFSmartLibrary
+//		For more information see : http://wpfsmartlibrary.codeplex.com/
+//		(by DotNetMastermind)
+//	--------------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Interactivity;
+
+namespace MahApps.Metro.Behaviours
+{
+    public class PasswordBoxBindingBehavior : Behavior<PasswordBox>
+    {
+        #region Fields
+
+        private static bool IsUpdating;
+
+        #endregion
+
+        #region DependencyProperty - Password ("string")
+
+        public static string GetPassword(DependencyObject dpo)
+        {
+            return (string)dpo.GetValue(PasswordProperty);
+        }
+        public static void SetPassword(DependencyObject dpo, string value)
+        {
+            dpo.SetValue(PasswordProperty, value);
+        }
+        /// <summary>
+        /// Gets or sets the bindable Password property on the PasswordBox control. This is a dependency property.
+        /// </summary>
+        public static readonly DependencyProperty PasswordProperty =
+                    DependencyProperty.RegisterAttached("Password", typeof(string),
+                                                                     typeof(PasswordBoxBindingBehavior),
+                                                                     new FrameworkPropertyMetadata(String.Empty,
+                                                                     new PropertyChangedCallback(OnPasswordPropertyChanged)));
+        /// <summary>
+        /// Handles changes to the 'Password' attached property.
+        /// </summary>
+        private static void OnPasswordPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
+        {
+            PasswordBox targetPasswordBox = sender as PasswordBox;
+            if (targetPasswordBox != null)
+            {
+                targetPasswordBox.PasswordChanged -= PasswordBox_PasswordChanged;
+                if (IsUpdating == false)
+                {
+                    targetPasswordBox.Password = (string)e.NewValue;
+                }
+                targetPasswordBox.PasswordChanged += PasswordBox_PasswordChanged;
+            }
+        }
+
+        /// <summary>
+        /// Handle the 'PasswordChanged'-event on the PasswordBox
+        /// </summary>
+        private static void PasswordBox_PasswordChanged(object sender, RoutedEventArgs e)
+        {
+            PasswordBox passwordBox = sender as PasswordBox;
+            IsUpdating = true;
+            SetPassword(passwordBox, passwordBox.Password);
+            IsUpdating = false;
+        }
+
+        #endregion
+    }
+}

MahApps.Metro/Controls/Dialogs/LoginDialog.cs

@@ -10,13 +10,15 @@ public class LoginDialogSettings : MetroDialogSettings
         private const string DefaultUsernameWatermark = "Username...";
         private const string DefaultPasswordWatermark = "Password...";
         private const Visibility DefaultNegativeButtonVisibility = Visibility.Collapsed;
+        private const bool DefaultEnablePasswordPreview = false;
 
         public LoginDialogSettings()
         {
             UsernameWatermark = DefaultUsernameWatermark;
             PasswordWatermark = DefaultPasswordWatermark;
             NegativeButtonVisibility = DefaultNegativeButtonVisibility;
             AffirmativeButtonText = "Login";
+            EnablePasswordPreview = DefaultEnablePasswordPreview;
         }
 
         public string InitialUsername { get; set; }
@@ -26,6 +28,8 @@ public LoginDialogSettings()
         public string PasswordWatermark { get; set; }
 
         public Visibility NegativeButtonVisibility { get; set; }
+
+        public bool EnablePasswordPreview { get; set; }
     }
 
     public class LoginDialogData
@@ -49,6 +53,14 @@ internal LoginDialog(MetroWindow parentWindow, LoginDialogSettings settings)
             UsernameWatermark = settings.UsernameWatermark;
             PasswordWatermark = settings.PasswordWatermark;
             NegativeButtonButtonVisibility = settings.NegativeButtonVisibility;
+            if (settings.EnablePasswordPreview)
+            {
+                object resource = Application.Current.FindResource("Win8MetroPasswordBox");
+                if (resource != null && resource.GetType() == typeof(Style))
+                {
+                    PART_TextBox2.Style = (Style)resource;
+                }
+            }
         }
 
         internal Task<LoginDialogData> WaitForButtonPressAsync()

MahApps.Metro/Converters/StringToVisibilityConverter.cs

@@ -0,0 +1,85 @@
+//	--------------------------------------------------------------------
+//		Obtained from: WPFSmartLibrary
+//		For more information see : http://wpfsmartlibrary.codeplex.com/
+//		(by DotNetMastermind)
+//	--------------------------------------------------------------------
+
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+using System.Windows.Markup;
+
+namespace MahApps.Metro.Converters
+{
+    /// <summary>
+    ///     Converts a String into a Visibility enumeration (and back)
+    ///     The FalseEquivalent can be declared with the "FalseEquivalent" property
+    /// </summary>
+    [ValueConversion(typeof (string), typeof (Visibility))]
+    [MarkupExtensionReturnType(typeof (StringToVisibilityConverter))]
+    public class StringToVisibilityConverter : MarkupExtension, IValueConverter
+    {
+        /// <summary>
+        ///     Initialize the properties with standard values
+        /// </summary>
+        public StringToVisibilityConverter()
+        {
+            FalseEquivalent = Visibility.Collapsed;
+            OppositeStringValue = false;
+        }
+
+        /// <summary>
+        ///     FalseEquivalent (default : Visibility.Collapsed => see Constructor)
+        /// </summary>
+        public Visibility FalseEquivalent { get; set; }
+
+        /// <summary>
+        ///     Define whether the opposite boolean value is crucial (default : false)
+        /// </summary>
+        public bool OppositeStringValue { get; set; }
+
+        #region MarkupExtension "overrides"
+
+        public override object ProvideValue(IServiceProvider serviceProvider)
+        {
+            return new StringToVisibilityConverter
+            {
+                FalseEquivalent = FalseEquivalent,
+                OppositeStringValue = OppositeStringValue
+            };
+        }
+
+        #endregion
+
+        #region IValueConverter Members
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is string && targetType == typeof (Visibility))
+            {
+                if (OppositeStringValue)
+                {
+                    return (((string) value).ToLower().Equals(String.Empty)) ? Visibility.Visible : FalseEquivalent;
+                }
+                return (((string) value).ToLower().Equals(String.Empty)) ? FalseEquivalent : Visibility.Visible;
+            }
+            return value;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is Visibility)
+            {
+                if (OppositeStringValue)
+                {
+                    return ((Visibility) value == Visibility.Visible) ? String.Empty : "visible";
+                }
+                return ((Visibility) value == Visibility.Visible) ? "visible" : String.Empty;
+            }
+            return value;
+        }
+
+        #endregion
+    }
+}

MahApps.Metro/MahApps.Metro.NET45.csproj

@@ -126,6 +126,7 @@
     <Compile Include="Behaviours\BindableResourceBehavior.cs" />
     <Compile Include="Behaviours\BorderlessWindowBehavior.cs" />
     <Compile Include="Behaviours\GlowWindowBehavior.cs" />
+    <Compile Include="Behaviours\PasswordBoxBindingBehavior.cs" />
     <Compile Include="Behaviours\StylizedBehaviorCollection.cs" />
     <Compile Include="Behaviours\TabControlSelectFirstVisibleTabBehavior.cs" />
     <Compile Include="Behaviours\WindowsSettingBehaviour.cs" />
@@ -197,6 +198,7 @@
     <Compile Include="Controls\VisualStates.cs" />
     <Compile Include="Controls\WindowCommands.cs" />
     <Compile Include="Converters\ResizeModeMinMaxButtonVisibilityConverter.cs" />
+    <Compile Include="Converters\StringToVisibilityConverter.cs" />
     <Compile Include="Converters\ThicknessToDoubleConverter.cs" />
     <Compile Include="Converters\TreeViewMarginConverter.cs" />
     <Compile Include="Microsoft.Windows.Shell\Standard\ComGuids.cs" />

MahApps.Metro/MahApps.Metro.csproj

@@ -86,6 +86,7 @@
     <Compile Include="Behaviours\BindableResourceBehavior.cs" />
     <Compile Include="Behaviours\BorderlessWindowBehavior.cs" />
     <Compile Include="Behaviours\GlowWindowBehavior.cs" />
+    <Compile Include="Behaviours\PasswordBoxBindingBehavior.cs" />
     <Compile Include="Behaviours\StylizedBehaviorCollection.cs" />
     <Compile Include="Behaviours\WindowsSettingBehaviour.cs" />
     <Compile Include="Controls\ClosingWindowEventHandlerArgs.cs" />
@@ -159,6 +160,7 @@
     <Compile Include="Controls\TreeHelper.cs" />
     <Compile Include="Controls\VisualStates.cs" />
     <Compile Include="Converters\ResizeModeMinMaxButtonVisibilityConverter.cs" />
+    <Compile Include="Converters\StringToVisibilityConverter.cs" />
     <Compile Include="Converters\ThicknessToDoubleConverter.cs" />
     <Compile Include="Converters\TreeViewMarginConverter.cs" />
     <Compile Include="Microsoft.Windows.Shell\Standard\ComGuids.cs" />
@@ -678,6 +680,12 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="MahApps.Metro.NET45.csproj">
+      <Project>{942D11C4-29F5-46C4-8C14-4B976D56C637}</Project>
+      <Name>MahApps.Metro.NET45</Name>
+    </ProjectReference>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.