better view for class distribution

Azaion.Dataset/Controls/ClassDistrtibutionProportionWidthConverter.cs

@@ -0,0 +1,33 @@
+using System.Globalization;
+using System.Windows.Data;
+
+namespace Azaion.Dataset.Controls
+{
+    public class ProportionToWidthConverter : IMultiValueConverter
+    {
+        private const double MinPixelBarWidth = 2.0;
+
+        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (values == null || values.Length < 2 ||
+                !(values[0] is double proportion) ||
+                !(values[1] is double containerActualWidth))
+                return MinPixelBarWidth; // Default or fallback width
+
+            if (containerActualWidth <= 0 || !double.IsFinite(containerActualWidth) || double.IsNaN(containerActualWidth))
+                return MinPixelBarWidth; // Container not ready or invalid
+
+            double calculatedWidth = proportion * containerActualWidth;
+
+            if (proportion >= 0 && calculatedWidth < MinPixelBarWidth)
+                return MinPixelBarWidth;
+
+            return Math.Max(0, calculatedWidth); // Ensure width is not negative
+        }
+
+        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}