Merge pull request #6 from ChrisPulman/AddConverters

Add Converters

README.md

@@ -44,6 +44,8 @@ Converters available are:
 -  VisibilityFromNumberConverter
 -  VisibilityFromNumberEqualsConverter
 -  ZeroToVisibilityConverter
+ - BrushToColorConverter
+ - FallbackBrushConverter
 
 ## Usage
 

Version.json

@@ -1,6 +1,6 @@
 {
     "$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-    "version": "1.0.1",
+    "version": "1.0.2",
     "publicReleaseRefSpec": [
         "^refs/heads/master$",
         "^refs/heads/main$"

src/XamlConverters/ArithmeticConverter.cs

@@ -91,5 +91,5 @@ object IValueConverter.Convert(object value, Type targetType, object parameter,
     /// <param name="culture">The parameter is not used.</param>
     /// <returns>The parameter is not used.</returns>
     /// <exception cref="Exception">An Exception.</exception>
-    object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => throw new Exception("The method or operation is not implemented.");
+    object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/BackgroundColorToBWForegroundConverter.cs

@@ -48,5 +48,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <param name="parameter">The converter parameter to use.</param>
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/Boolean/CollectionSizeToBoolConverter.cs

@@ -76,5 +76,5 @@ public virtual object Convert(object value, Type targetType, object parameter, C
     /// <param name="parameter">The converter parameter to use.</param>
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
-    public virtual object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public virtual object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/Boolean/NullToBoolConverter.cs

@@ -47,5 +47,5 @@ public class NullToBoolConverter : IValueConverter
     /// <param name="parameter">The converter parameter to use.</param>
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/Boolean/ValueNotNullToBoolConverter.cs

@@ -40,5 +40,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
     /// <exception cref="NotImplementedException">Not Implemented Exception.</exception>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/BrushToColorConverter.cs

@@ -0,0 +1,44 @@
+// Copyright (c) Chris Pulman. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System.Globalization;
+using System.Windows.Data;
+using System.Windows.Media;
+
+namespace CP.Xaml.Converters;
+
+/// <summary>
+/// BrushToColorConverter.
+/// </summary>
+/// <seealso cref="System.Windows.Data.IValueConverter" />
+public class BrushToColorConverter : IValueConverter
+{
+    /// <summary>
+    /// Converts a value.
+    /// </summary>
+    /// <param name="value">The value produced by the binding source.</param>
+    /// <param name="targetType">The type of the binding target property.</param>
+    /// <param name="parameter">The converter parameter to use.</param>
+    /// <param name="culture">The culture to use in the converter.</param>
+    /// <returns>
+    /// A converted value. If the method returns null, the valid null value is used.
+    /// </returns>
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture) => value switch
+    {
+        SolidColorBrush brush => brush.Color,
+        Color color => color,
+        _ => Colors.Red
+    };
+
+    /// <summary>
+    /// Converts a value.
+    /// </summary>
+    /// <param name="value">The value that is produced by the binding target.</param>
+    /// <param name="targetType">The type to convert to.</param>
+    /// <param name="parameter">The converter parameter to use.</param>
+    /// <param name="culture">The culture to use in the converter.</param>
+    /// <returns>
+    /// A converted value. If the method returns null, the valid null value is used.
+    /// </returns>
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) => Binding.DoNothing;
+}

src/XamlConverters/FallbackBrushConverter.cs

@@ -0,0 +1,44 @@
+// Copyright (c) Chris Pulman. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System.Globalization;
+using System.Windows.Data;
+using System.Windows.Media;
+
+namespace CP.Xaml.Converters;
+
+/// <summary>
+/// FallbackBrushConverter.
+/// </summary>
+/// <seealso cref="System.Windows.Data.IValueConverter" />
+public class FallbackBrushConverter : IValueConverter
+{
+    /// <summary>
+    /// Converts a value.
+    /// </summary>
+    /// <param name="value">The value produced by the binding source.</param>
+    /// <param name="targetType">The type of the binding target property.</param>
+    /// <param name="parameter">The converter parameter to use.</param>
+    /// <param name="culture">The culture to use in the converter.</param>
+    /// <returns>
+    /// A converted value. If the method returns null, the valid null value is used.
+    /// </returns>
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture) => value switch
+    {
+        SolidColorBrush brush => brush,
+        Color color => new SolidColorBrush(color),
+        _ => new SolidColorBrush(Colors.Red)
+    };
+
+    /// <summary>
+    /// Converts a value.
+    /// </summary>
+    /// <param name="value">The value that is produced by the binding target.</param>
+    /// <param name="targetType">The type to convert to.</param>
+    /// <param name="parameter">The converter parameter to use.</param>
+    /// <param name="culture">The culture to use in the converter.</param>
+    /// <returns>
+    /// A converted value. If the method returns null, the valid null value is used.
+    /// </returns>
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) => Binding.DoNothing;
+}

src/XamlConverters/IntToThicknessConverter.cs

@@ -101,5 +101,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <param name="parameter">The converter parameter to use.</param>
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/IsGreaterThanOrEqualToConverter.cs

@@ -78,7 +78,7 @@ public object Convert(object[] values, Type targetType, object parameter, Cultur
     /// <param name="parameter">The converter parameter to use.</param>
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 
     /// <summary>
     /// Converts a binding target value to the source binding values.

src/XamlConverters/LineStrokeLevelConverter.cs

@@ -47,5 +47,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <param name="parameter">The parameter.</param>
     /// <param name="culture">The culture.</param>
     /// <returns>A Value.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/MathConverter.cs

@@ -110,7 +110,7 @@ public object Convert(object[] values, Type targetType, object parameter, Cultur
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
     /// <exception cref="NotImplementedException">Not Implemented Exception.</exception>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 
     /// <summary>
     /// Converts a binding target value to the source binding values.

src/XamlConverters/MultiConverter.cs

@@ -34,5 +34,5 @@ public class MultiConverter : List<IValueConverter>, IValueConverter
     /// <param name="parameter">The converter parameter to use.</param>
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/ToLowerConverter.cs

@@ -29,5 +29,5 @@ public class ToLowerConverter : IValueConverter
     /// <param name="parameter">The converter parameter to use.</param>
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/ToUpperConverter.cs

@@ -30,5 +30,5 @@ public class ToUpperConverter : IValueConverter
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
     /// <exception cref="NotImplementedException">Not Implemented Exception.</exception>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/ValueGtXConverter.cs

@@ -44,5 +44,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <param name="parameter">The parameter is not used.</param>
     /// <param name="culture">The parameter is not used.</param>
     /// <returns>The parameter is not used.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/ValueToBrushConverter.cs

@@ -64,5 +64,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <param name="parameter">The parameter.</param>
     /// <param name="culture">The culture.</param>
     /// <returns>A Value.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/Visibility/NullToVisibilityConverter.cs

@@ -41,5 +41,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <param name="parameter">The converter parameter to use.</param>
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
-}
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
+}

src/XamlConverters/Visibility/ValueNotNullToVisibilityConverter.cs

@@ -43,5 +43,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <exception cref="NotImplementedException">
     /// The method or operation is not implemented.
     /// </exception>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
-}
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
+}

src/XamlConverters/Visibility/VisibilityFromNumberConverter.cs

@@ -41,5 +41,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <param name="parameter">The converter parameter to use.</param>
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/Visibility/VisibilityFromNumberEqualsConverter.cs

@@ -42,5 +42,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
     /// <exception cref="Exception">The method or operation is not implemented.</exception>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => throw new Exception("The method or operation is not implemented.");
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
 }

src/XamlConverters/Visibility/ZeroToVisibilityConverter.cs

@@ -36,5 +36,5 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
     /// <param name="culture">The culture to use in the converter.</param>
     /// <returns>A converted value. If the method returns null, the valid null value is used.</returns>
     /// <exception cref="NotImplementedException">Not Implemented Exception.</exception>
-    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value;
-}
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => Binding.DoNothing;
+}