Smart WPF Login Overlay (Windows 8 Style)

//	------------------------------------------------------------------
//		Member of the WPFSmartLibrary
//		For more information see : (coming soon ...)
//		(by DotNetMastermind)
//
//		filename		: BooleanConverter.cs
//		namespace	: SoftArcs.WPFSmartLibrary.ValueConverter
//		class(es)	: BoolToBrushConverter
//						  BoolToOppositeBoolConverter
//
//	------------------------------------------------------------------
using System;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Markup;
using System.Windows.Media;

namespace SoftArcs.WPFSmartLibrary.ValueConverter
{
	/// <summary>
	/// Converts a Boolean value into a Brush (and back)
	/// The Brushes for the true value and the false value can be declared separately
	/// </summary>
	[ValueConversion( typeof( bool ), typeof( Brush ) )]
	[MarkupExtensionReturnType( typeof( BoolToBrushConverter ) )]
	public class BoolToBrushConverter : MarkupExtension, IValueConverter
	{
		/// <summary>
		/// TrueValueBrush (default : MediumSpringGreen => see Constructor)
		/// </summary>
		public Brush TrueValueBrush { get; set; }

		/// <summary>
		/// FalseValueBrush (default : White => see Constructor)
		/// </summary>
		public Brush FalseValueBrush { get; set; }

		/// <summary>
		/// Initialize the 'True' and 'False' Brushes with standard values
		/// </summary>
		public BoolToBrushConverter()
		{
			TrueValueBrush = Brushes.MediumSpringGreen;
			FalseValueBrush = Brushes.White;
		}

		#region IValueConverter Members

		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
		{
			if (value is bool)
			{
				return (bool)value ? TrueValueBrush : FalseValueBrush;
			}

			return value;
		}

		public object ConvertBack(object value, Type targetType, object parameter,
										  CultureInfo culture)
		{
			if (value is Brush)
			{
				return value.Equals( TrueValueBrush );
			}

			return value;
		}

		#endregion // IValueConverter Members

		#region MarkupExtension "overrides"

		public override object ProvideValue(IServiceProvider serviceProvider)
		{
			return new BoolToBrushConverter
						 {
							 TrueValueBrush = this.TrueValueBrush,
							 FalseValueBrush = this.FalseValueBrush
						 };
		}

		#endregion
	}

	/// <summary>
	/// Converts a Boolean value into an opposite Boolean value (and back)
	/// </summary>
	[ValueConversion( typeof( bool ), typeof( bool ) )]
	[MarkupExtensionReturnType( typeof( BoolToOppositeBoolConverter ) )]
	public class BoolToOppositeBoolConverter : MarkupExtension, IValueConverter
	{
		#region IValueConverter Members

		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
		{
			if (value is bool)
			{
				return !(bool)value;
			}

			return value;
		}

		public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
		{
			if (value is bool)
			{
				return !(bool)value;
			}

			return value;
		}

		#endregion

		#region MarkupExtension "overrides"

		public override object ProvideValue(IServiceProvider serviceProvider)
		{
			return new BoolToOppositeBoolConverter();
		}

		#endregion
	}
}