wip

2024-11-22 18:52:25 +00:00
parent 8a2497be82
commit e809c22cb7
15 changed files with 145 additions and 31 deletions
@@ -0,0 +1,40 @@
+using Microsoft.UI.Xaml.Data;
+using Microsoft.UI.Xaml.Markup;
+using System;
+
+namespace Toolkit.UI.WinUI;
+
+public abstract class ValueConverter<TSource, TTarget> :
+    MarkupExtension,
+    IValueConverter
+{
+    public object? Convert(object value,
+        Type targetType,
+        object parameter,
+        string language) =>
+        ConvertTo((TSource)value, targetType, parameter, language);
+
+    public object? ConvertBack(object value,
+        Type targetType,
+        object parameter,
+        string language) =>
+        ConvertBackTo((TTarget)value, targetType, parameter, language);
+
+    public TTarget? Convert(TSource value) =>
+        ConvertTo(value, null, null, null);
+
+    public TSource? ConvertBack(TTarget value) =>
+        ConvertBackTo(value, null, null, null);
+
+    protected virtual TTarget? ConvertTo(TSource value,
+        Type? targetType,
+        object? parameter,
+        string? language) => default;
+
+    protected virtual TSource? ConvertBackTo(TTarget value,
+        Type? targetType,
+        object? parameter,
+        string? language) => default;
+
+    protected override object ProvideValue() => this;
+}