fixed #480

src/Shared/HandyControl_Shared/Controls/Input/NumericUpDown.cs

@@ -1,7 +1,10 @@
 using System;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Data;
 using System.Windows.Input;
+using System.Windows.Media;
 using HandyControl.Data;
 using HandyControl.Interactivity;
 using HandyControl.Tools;
@@ -85,6 +88,13 @@ namespace HandyControl.Controls
 
             if (_textBox != null)
             {
+                _textBox.SetBinding(SelectionBrushProperty, new Binding(SelectionBrushProperty.Name) { Source = this });
+#if !(NET40 || NET45 || NET451 || NET452 || NET46 || NET461 || NET462 || NET47 || NET471 || NET472)
+                _textBox.SetBinding(SelectionTextBrushProperty, new Binding(SelectionTextBrushProperty.Name) { Source = this });
+#endif
+                _textBox.SetBinding(SelectionOpacityProperty, new Binding(SelectionOpacityProperty.Name) { Source = this });
+                _textBox.SetBinding(CaretBrushProperty, new Binding(CaretBrushProperty.Name) { Source = this });
+
                 TextCompositionManager.AddPreviewTextInputHandler(_textBox, PreviewTextInputHandler);
                 _textBox.TextChanged += TextBox_TextChanged;
                 _textBox.PreviewKeyDown += TextBox_PreviewKeyDown;
@@ -389,6 +399,46 @@ namespace HandyControl.Controls
             set => SetValue(IsReadOnlyProperty, ValueBoxes.BooleanBox(value));
         }
 
+        public static readonly DependencyProperty SelectionBrushProperty =
+            TextBoxBase.SelectionBrushProperty.AddOwner(typeof(NumericUpDown));
+
+        public Brush SelectionBrush
+        {
+            get => (Brush)GetValue(SelectionBrushProperty);
+            set => SetValue(SelectionBrushProperty, value);
+        }
+
+#if !(NET40 || NET45 || NET451 || NET452 || NET46 || NET461 || NET462 || NET47 || NET471 || NET472)
+
+        public static readonly DependencyProperty SelectionTextBrushProperty =
+            TextBoxBase.SelectionTextBrushProperty.AddOwner(typeof(NumericUpDown));
+
+        public Brush SelectionTextBrush
+        {
+            get => (Brush)GetValue(SelectionTextBrushProperty);
+            set => SetValue(SelectionTextBrushProperty, value);
+        }
+
+#endif
+
+        public static readonly DependencyProperty SelectionOpacityProperty =
+            TextBoxBase.SelectionOpacityProperty.AddOwner(typeof(NumericUpDown));
+
+        public double SelectionOpacity
+        {
+            get => (double)GetValue(SelectionOpacityProperty);
+            set => SetValue(SelectionOpacityProperty, value);
+        }
+
+        public static readonly DependencyProperty CaretBrushProperty =
+            TextBoxBase.CaretBrushProperty.AddOwner(typeof(NumericUpDown));
+
+        public Brush CaretBrush
+        {
+            get => (Brush)GetValue(CaretBrushProperty);
+            set => SetValue(CaretBrushProperty, value);
+        }
+
         public Func<string, OperationResult<bool>> VerifyFunc { get; set; }
 
         public virtual bool VerifyData()