优化更新代码，添加界面功能并整合

WPFluent/Converters/AnimationFactorToValueConverter.cs

@@ -0,0 +1,32 @@
+
+
+
+using System.Windows.Data;
+
+namespace WPFluent.Converters;
+
+internal class AnimationFactorToValueConverter : IMultiValueConverter
+{
+    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+    {
+        if(values[0] is not double completeValue)
+        {
+            return 0.0;
+        }
+
+        if(values[1] is not double factor)
+        {
+            return 0.0;
+        }
+
+        if(parameter is "negative")
+        {
+            factor = -factor;
+        }
+
+        return factor * completeValue;
+    }
+
+    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
+    { throw new NotImplementedException(); }
+}