添加项目文件。

AIStudio.Wpf.ADiagram/Controls/ScrollViewer.xaml.cs

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+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Animation;
+
+namespace AIStudio.Wpf.ADiagram.Controls
+{
+    public class ScrollViewer : System.Windows.Controls.ScrollViewer
+    {
+        private double _totalVerticalOffset;
+
+        private double _totalHorizontalOffset;
+
+        private bool _isRunning;
+
+        /// <summary>
+        ///     滚动方向
+        /// </summary>
+        public static readonly DependencyProperty OrientationProperty = DependencyProperty.Register(
+            "Orientation", typeof(Orientation), typeof(ScrollViewer), new PropertyMetadata(Orientation.Vertical));
+
+        /// <summary>
+        ///     滚动方向
+        /// </summary>
+        public Orientation Orientation
+        {
+            get => (Orientation)GetValue(OrientationProperty);
+            set => SetValue(OrientationProperty, value);
+        }
+
+        /// <summary>
+        ///     是否响应鼠标滚轮操作
+        /// </summary>
+        public static readonly DependencyProperty CanMouseWheelProperty = DependencyProperty.Register(
+            "CanMouseWheel", typeof(bool), typeof(ScrollViewer), new PropertyMetadata(true));
+
+        /// <summary>
+        ///     是否响应鼠标滚轮操作
+        /// </summary>
+        public bool CanMouseWheel
+        {
+            get => (bool)GetValue(CanMouseWheelProperty);
+            set => SetValue(CanMouseWheelProperty, value);
+        }
+
+        protected override void OnMouseWheel(MouseWheelEventArgs e)
+        {
+            if (!CanMouseWheel) return;
+
+            if (!IsInertiaEnabled)
+            {
+                if (Orientation == Orientation.Vertical)
+                {
+                    base.OnMouseWheel(e);
+                }
+                else
+                {
+                    _totalHorizontalOffset = HorizontalOffset;
+                    CurrentHorizontalOffset = HorizontalOffset;
+                    _totalHorizontalOffset = Math.Min(Math.Max(0, _totalHorizontalOffset - e.Delta), ScrollableWidth);
+                    CurrentHorizontalOffset = _totalHorizontalOffset;
+                }
+                return;
+            }
+            e.Handled = true;
+
+            if (Orientation == Orientation.Vertical)
+            {
+                if (!_isRunning)
+                {
+                    _totalVerticalOffset = VerticalOffset;
+                    CurrentVerticalOffset = VerticalOffset;
+                }
+                _totalVerticalOffset = Math.Min(Math.Max(0, _totalVerticalOffset - e.Delta), ScrollableHeight);
+                ScrollToVerticalOffsetInternal(_totalVerticalOffset);
+            }
+            else
+            {
+                if (!_isRunning)
+                {
+                    _totalHorizontalOffset = HorizontalOffset;
+                    CurrentHorizontalOffset = HorizontalOffset;
+                }
+                _totalHorizontalOffset = Math.Min(Math.Max(0, _totalHorizontalOffset - e.Delta), ScrollableWidth);
+                ScrollToHorizontalOffsetInternal(_totalHorizontalOffset);
+            }
+        }
+
+        internal void ScrollToTopInternal(double milliseconds = 500)
+        {
+            if (!_isRunning)
+            {
+                _totalVerticalOffset = VerticalOffset;
+                CurrentVerticalOffset = VerticalOffset;
+            }
+            ScrollToVerticalOffsetInternal(0, milliseconds);
+        }
+
+        internal void ScrollToVerticalOffsetInternal(double offset, double milliseconds = 500)
+        {
+            var animation = AnimationHelper.CreateAnimation(offset, milliseconds);
+            animation.EasingFunction = new CubicEase
+            {
+                EasingMode = EasingMode.EaseOut
+            };
+            animation.FillBehavior = FillBehavior.Stop;
+            animation.Completed += (s, e1) =>
+            {
+                CurrentVerticalOffset = offset;
+                _isRunning = false;
+            };
+            _isRunning = true;
+
+            BeginAnimation(CurrentVerticalOffsetProperty, animation, HandoffBehavior.Compose);
+        }
+
+        internal void ScrollToHorizontalOffsetInternal(double offset, double milliseconds = 500)
+        {
+            var animation = AnimationHelper.CreateAnimation(offset, milliseconds);
+            animation.EasingFunction = new CubicEase
+            {
+                EasingMode = EasingMode.EaseOut
+            };
+            animation.FillBehavior = FillBehavior.Stop;
+            animation.Completed += (s, e1) =>
+            {
+                CurrentHorizontalOffset = offset;
+                _isRunning = false;
+            };
+            _isRunning = true;
+
+            BeginAnimation(CurrentHorizontalOffsetProperty, animation, HandoffBehavior.Compose);
+        }
+
+        protected override HitTestResult HitTestCore(PointHitTestParameters hitTestParameters) =>
+            IsPenetrating ? null : base.HitTestCore(hitTestParameters);
+
+        /// <summary>
+        ///     是否支持惯性
+        /// </summary>
+        public static readonly DependencyProperty IsInertiaEnabledProperty = DependencyProperty.RegisterAttached(
+            "IsInertiaEnabled", typeof(bool), typeof(ScrollViewer), new PropertyMetadata(false));
+
+        public static void SetIsInertiaEnabled(DependencyObject element, bool value)
+        {
+            element.SetValue(IsInertiaEnabledProperty, value);
+        }
+
+        public static bool GetIsInertiaEnabled(DependencyObject element)
+        {
+            return (bool)element.GetValue(IsInertiaEnabledProperty);
+        }
+
+        /// <summary>
+        ///     是否支持惯性
+        /// </summary>
+        public bool IsInertiaEnabled
+        {
+            get => (bool)GetValue(IsInertiaEnabledProperty);
+            set => SetValue(IsInertiaEnabledProperty, value);
+        }
+
+        /// <summary>
+        ///     控件是否可以穿透点击
+        /// </summary>
+        public static readonly DependencyProperty IsPenetratingProperty = DependencyProperty.RegisterAttached(
+            "IsPenetrating", typeof(bool), typeof(ScrollViewer), new PropertyMetadata(false));
+
+        /// <summary>
+        ///     控件是否可以穿透点击
+        /// </summary>
+        public bool IsPenetrating
+        {
+            get => (bool)GetValue(IsPenetratingProperty);
+            set => SetValue(IsPenetratingProperty, value);
+        }
+
+        public static void SetIsPenetrating(DependencyObject element, bool value)
+        {
+            element.SetValue(IsPenetratingProperty, value);
+        }
+
+        public static bool GetIsPenetrating(DependencyObject element)
+        {
+            return (bool)element.GetValue(IsPenetratingProperty);
+        }
+
+        /// <summary>
+        ///     当前垂直滚动偏移
+        /// </summary>
+        internal static readonly DependencyProperty CurrentVerticalOffsetProperty = DependencyProperty.Register(
+            "CurrentVerticalOffset", typeof(double), typeof(ScrollViewer), new PropertyMetadata(0d, OnCurrentVerticalOffsetChanged));
+
+        private static void OnCurrentVerticalOffsetChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            if (d is ScrollViewer ctl && e.NewValue is double v)
+            {
+                ctl.ScrollToVerticalOffset(v);
+            }
+        }
+
+        /// <summary>
+        ///     当前垂直滚动偏移
+        /// </summary>
+        internal double CurrentVerticalOffset
+        {
+            // ReSharper disable once UnusedMember.Local
+            get => (double)GetValue(CurrentVerticalOffsetProperty);
+            set => SetValue(CurrentVerticalOffsetProperty, value);
+        }
+
+        /// <summary>
+        ///     当前水平滚动偏移
+        /// </summary>
+        internal static readonly DependencyProperty CurrentHorizontalOffsetProperty = DependencyProperty.Register(
+            "CurrentHorizontalOffset", typeof(double), typeof(ScrollViewer), new PropertyMetadata(0d, OnCurrentHorizontalOffsetChanged));
+
+        private static void OnCurrentHorizontalOffsetChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            if (d is ScrollViewer ctl && e.NewValue is double v)
+            {
+                ctl.ScrollToHorizontalOffset(v);
+            }
+        }
+
+        /// <summary>
+        ///     当前水平滚动偏移
+        /// </summary>
+        internal double CurrentHorizontalOffset
+        {
+            get => (double)GetValue(CurrentHorizontalOffsetProperty);
+            set => SetValue(CurrentHorizontalOffsetProperty, value);
+        }
+    }
+}