优化更新代码，添加界面功能并整合

WPFluent/Controls/Scroll/PassiveScrollViewer.cs

@@ -0,0 +1,58 @@
+
+
+
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace WPFluent.Controls;
+
+/// <summary>
+/// A custom ScrollViewer that allows certain mouse events to bubble through when it's inactive.
+/// </summary>
+public class PassiveScrollViewer : ScrollViewer
+{
+    /// <summary>
+    /// Identifies the <see cref="IsScrollSpillEnabled"/> dependency property.
+    /// </summary>
+    public static readonly DependencyProperty IsScrollSpillEnabledProperty = DependencyProperty.Register(
+        nameof(IsScrollSpillEnabled),
+        typeof(bool),
+        typeof(PassiveScrollViewer),
+        new PropertyMetadata(true));
+
+    private bool HasReachedEndOfScrolling(MouseWheelEventArgs e)
+    {
+        var isScrollingUp = e.Delta > 0;
+        var isScrollingDown = e.Delta < 0;
+        var isTopOfViewport = VerticalOffset == 0;
+        var isBottomOfViewport = VerticalOffset >= ScrollableHeight;
+
+        return isScrollingUp && isTopOfViewport || isScrollingDown && isBottomOfViewport;
+    }
+
+    private bool IsContentSmallerThanViewport => ScrollableHeight <= 0;
+
+    private bool IsVerticalScrollingDisabled => VerticalScrollBarVisibility == ScrollBarVisibility.Disabled;
+
+    protected override void OnMouseWheel(MouseWheelEventArgs e)
+    {
+        if(IsVerticalScrollingDisabled ||
+            IsContentSmallerThanViewport ||
+            IsScrollSpillEnabled &&
+            HasReachedEndOfScrolling(e))
+        {
+            return;
+        }
+
+        base.OnMouseWheel(e);
+    }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether blocked inner scrolling should be propagated forward.
+    /// </summary>
+    public bool IsScrollSpillEnabled
+    {
+        get { return (bool)GetValue(IsScrollSpillEnabledProperty); }
+        set { SetValue(IsScrollSpillEnabledProperty, value); }
+    }
+}