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@ -3,29 +3,41 @@ using System.Collections.Generic; |
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using System.Diagnostics; |
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using System.Diagnostics; |
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using System.Linq; |
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using System.Linq; |
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using System.Reflection; |
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using System.Reflection; |
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using System.Runtime.CompilerServices; |
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using System.Text; |
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using System.Text; |
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using System.Threading.Tasks; |
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using System.Threading.Tasks; |
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using System.Windows; |
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using System.Windows; |
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using System.Windows.Controls; |
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using System.Windows.Controls; |
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using System.Windows.Controls.Primitives; |
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using System.Windows.Controls.Primitives; |
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using System.Windows.Data; |
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using System.Windows.Documents; |
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using System.Windows.Input; |
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using System.Windows.Input; |
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using System.Windows.Interop; |
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using System.Windows.Media; |
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using System.Windows.Media.Animation; |
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using System.Windows.Media.Animation; |
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using System.Windows.Media.Imaging; |
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using System.Windows.Navigation; |
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using System.Windows.Shapes; |
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namespace EleCho.WpfSuite |
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using TomsToolbox.Wpf; |
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using TomsToolbox.Wpf.Interactivity; |
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namespace LibScrollingOptimization |
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{ |
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{ |
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/// <inheritdoc/>
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/// <summary>
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public class ScrollViewer : System.Windows.Controls.ScrollViewer |
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///
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/// </summary>
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public class SmoothScrollingBehavior : FrameworkElementBehavior<Control> |
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{ |
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{ |
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static ScrollViewer() |
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private ScrollViewer? _scrollViewer; |
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private ScrollContentPresenter? _scrollContentPresenter; |
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private delegate bool GetBool(ScrollViewer scrollViewer); |
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private static readonly GetBool _propertyHandlesMouseWheelScrollingGetter; |
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private static readonly IEasingFunction _scrollingAnimationEase = new CubicEase() { EasingMode = EasingMode.EaseOut }; |
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private const long _millisecondsBetweenTouchpadScrolling = 100; |
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private bool _animationRunning = false; |
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private int _lastScrollDelta = 0; |
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private int _lastVerticalScrollingDelta = 0; |
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private int _lastHorizontalScrollingDelta = 0; |
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private long _lastScrollingTick; |
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static SmoothScrollingBehavior() |
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{ |
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{ |
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DefaultStyleKeyProperty.OverrideMetadata(typeof(ScrollViewer), new FrameworkPropertyMetadata(typeof(ScrollViewer))); |
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#if NETCOREAPP
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#if NETCOREAPP
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_propertyHandlesMouseWheelScrollingGetter = typeof(ScrollViewer) |
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_propertyHandlesMouseWheelScrollingGetter = typeof(ScrollViewer) |
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@ -40,42 +52,67 @@ namespace EleCho.WpfSuite |
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#endif
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#endif
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} |
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} |
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private delegate bool GetBool(ScrollViewer scrollViewer); |
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[UnsafeAccessor(UnsafeAccessorKind.Method, Name = "get_ScrollInfo")] |
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private static readonly GetBool _propertyHandlesMouseWheelScrollingGetter; |
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static extern IScrollInfo GetScrollInfo(ScrollViewer scrollViewer); |
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private static readonly IEasingFunction _scrollingAnimationEase = new CubicEase() { EasingMode = EasingMode.EaseOut }; |
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private const long _millisecondsBetweenTouchpadScrolling = 100; |
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private bool _animationRunning = false; |
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/// <inheritdoc />
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private int _lastScrollDelta = 0; |
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protected override void OnAssociatedObjectLoaded() |
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private int _lastVerticalScrollingDelta = 0; |
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{ |
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private int _lastHorizontalScrollingDelta = 0; |
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base.OnAssociatedObjectLoaded(); |
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private long _lastScrollingTick; |
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_scrollViewer = AssociatedObject.VisualDescendantsAndSelf().OfType<ScrollViewer>().FirstOrDefault(); |
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private FrameworkElement? _scrollContentPresenter; |
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if (_scrollViewer == null) |
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return; |
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_scrollViewer.PreviewMouseWheel += ScrollViewer_PreviewMouseWheel; |
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_scrollContentPresenter = _scrollViewer.VisualDescendants().OfType<ScrollContentPresenter>().FirstOrDefault(); |
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} |
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/// <inheritdoc />
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/// <inheritdoc />
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public override void OnApplyTemplate() |
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protected override void OnAssociatedObjectUnloaded() |
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{ |
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{ |
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base.OnApplyTemplate(); |
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base.OnAssociatedObjectUnloaded(); |
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_scrollContentPresenter = GetTemplateChild("PART_ScrollContentPresenter") as FrameworkElement; |
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if (_scrollViewer == null) |
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return; |
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_scrollViewer.PreviewMouseWheel -= ScrollViewer_PreviewMouseWheel; |
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} |
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private void ScrollViewer_PreviewMouseWheel(object sender, MouseWheelEventArgs e) |
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{ |
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if (!ScrollWithWheelDelta) |
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{ |
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return; |
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} |
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else |
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{ |
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Debug.WriteLine(e.Delta); |
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CoreScrollWithWheelDelta(e); |
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} |
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} |
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} |
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private void CoreScrollWithWheelDelta(MouseWheelEventArgs e) |
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private void CoreScrollWithWheelDelta(MouseWheelEventArgs e) |
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{ |
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{ |
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if (_scrollViewer == null || _scrollContentPresenter == null) |
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return; |
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if (e.Handled) |
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if (e.Handled) |
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{ |
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{ |
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return; |
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return; |
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} |
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} |
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if (!AlwaysHandleMouseWheelScrolling && |
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if (!AlwaysHandleMouseWheelScrolling && |
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!_propertyHandlesMouseWheelScrollingGetter.Invoke(this)) |
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!_propertyHandlesMouseWheelScrollingGetter.Invoke(_scrollViewer)) |
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{ |
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{ |
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return; |
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return; |
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} |
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} |
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bool vertical = ExtentHeight > 0; |
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bool vertical = _scrollViewer.ExtentHeight > 0; |
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bool horizontal = ExtentWidth > 0; |
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bool horizontal = _scrollViewer.ExtentWidth > 0; |
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var tickCount = Environment.TickCount; |
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var tickCount = Environment.TickCount; |
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var isTouchpadScrolling = |
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var isTouchpadScrolling = |
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@ -99,31 +136,31 @@ namespace EleCho.WpfSuite |
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if (vertical) |
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if (vertical) |
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{ |
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{ |
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if (ScrollInfo is IScrollInfo scrollInfo) |
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if (GetScrollInfo(_scrollViewer) is IScrollInfo scrollInfo) |
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{ |
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{ |
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// 考虑到 VirtualizingPanel 可能是虚拟的大小, 所以这里需要校正 Delta
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// 考虑到 VirtualizingPanel 可能是虚拟的大小, 所以这里需要校正 Delta
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scrollDelta *= scrollInfo.ViewportHeight / (_scrollContentPresenter?.ActualHeight ?? ActualHeight); |
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scrollDelta *= scrollInfo.ViewportHeight / (_scrollContentPresenter?.ActualHeight ?? _scrollViewer.ActualHeight); |
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} |
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} |
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var sameDirectionAsLast = Math.Sign(e.Delta) == Math.Sign(_lastVerticalScrollingDelta); |
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var sameDirectionAsLast = Math.Sign(e.Delta) == Math.Sign(_lastVerticalScrollingDelta); |
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var nowOffset = sameDirectionAsLast && _animationRunning ? VerticalOffsetTarget : VerticalOffset; |
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var nowOffset = sameDirectionAsLast && _animationRunning ? VerticalOffsetTarget : _scrollViewer.VerticalOffset; |
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var newOffset = nowOffset - scrollDelta; |
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var newOffset = nowOffset - scrollDelta; |
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if (newOffset < 0) |
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if (newOffset < 0) |
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newOffset = 0; |
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newOffset = 0; |
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if (newOffset > ScrollableHeight) |
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if (newOffset > _scrollViewer.ScrollableHeight) |
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newOffset = ScrollableHeight; |
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newOffset = _scrollViewer.ScrollableHeight; |
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SetValue(VerticalOffsetTargetPropertyKey, newOffset); |
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SetValue(VerticalOffsetTargetPropertyKey, newOffset); |
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BeginAnimation(ScrollViewerUtils.VerticalOffsetProperty, null); |
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_scrollViewer.BeginAnimation(ScrollViewerUtils.VerticalOffsetProperty, null); |
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if (!EnableScrollingAnimation || isTouchpadScrolling) |
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if (!EnableScrollingAnimation || isTouchpadScrolling) |
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{ |
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{ |
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ScrollToVerticalOffset(newOffset); |
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_scrollViewer.ScrollToVerticalOffset(newOffset); |
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} |
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} |
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else |
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else |
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{ |
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{ |
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var diff = newOffset - VerticalOffset; |
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var diff = newOffset - _scrollViewer.VerticalOffset; |
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var absDiff = Math.Abs(diff); |
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var absDiff = Math.Abs(diff); |
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var duration = ScrollingAnimationDuration; |
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var duration = ScrollingAnimationDuration; |
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if (absDiff < Mouse.MouseWheelDeltaForOneLine) |
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if (absDiff < Mouse.MouseWheelDeltaForOneLine) |
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@ -134,45 +171,45 @@ namespace EleCho.WpfSuite |
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DoubleAnimation doubleAnimation = new DoubleAnimation() { |
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DoubleAnimation doubleAnimation = new DoubleAnimation() { |
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EasingFunction = _scrollingAnimationEase, |
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EasingFunction = _scrollingAnimationEase, |
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Duration = duration, |
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Duration = duration, |
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From = VerticalOffset, |
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From = _scrollViewer.VerticalOffset, |
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To = newOffset, |
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To = newOffset, |
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}; |
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}; |
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doubleAnimation.Completed += DoubleAnimation_Completed; |
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doubleAnimation.Completed += DoubleAnimation_Completed; |
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_animationRunning = true; |
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_animationRunning = true; |
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BeginAnimation(ScrollViewerUtils.VerticalOffsetProperty, doubleAnimation, HandoffBehavior.SnapshotAndReplace); |
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_scrollViewer.BeginAnimation(ScrollViewerUtils.VerticalOffsetProperty, doubleAnimation, HandoffBehavior.SnapshotAndReplace); |
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} |
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} |
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_lastVerticalScrollingDelta = e.Delta; |
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_lastVerticalScrollingDelta = e.Delta; |
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} |
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} |
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else if (horizontal) |
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else if (horizontal) |
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{ |
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{ |
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if (ScrollInfo is IScrollInfo scrollInfo) |
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if (GetScrollInfo(_scrollViewer) is IScrollInfo scrollInfo) |
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{ |
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{ |
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// 考虑到 VirtualizingPanel 可能是虚拟的大小, 所以这里需要校正 Delta
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// 考虑到 VirtualizingPanel 可能是虚拟的大小, 所以这里需要校正 Delta
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scrollDelta *= scrollInfo.ViewportWidth / (_scrollContentPresenter?.ActualWidth ?? ActualWidth); |
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scrollDelta *= scrollInfo.ViewportWidth / (_scrollContentPresenter?.ActualWidth ?? _scrollViewer.ActualWidth); |
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} |
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} |
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var sameDirectionAsLast = Math.Sign(e.Delta) == Math.Sign(_lastHorizontalScrollingDelta); |
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var sameDirectionAsLast = Math.Sign(e.Delta) == Math.Sign(_lastHorizontalScrollingDelta); |
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var nowOffset = sameDirectionAsLast && _animationRunning ? HorizontalOffsetTarget : HorizontalOffset; |
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var nowOffset = sameDirectionAsLast && _animationRunning ? HorizontalOffsetTarget : _scrollViewer.HorizontalOffset; |
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var newOffset = nowOffset - scrollDelta; |
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var newOffset = nowOffset - scrollDelta; |
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if (newOffset < 0) |
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if (newOffset < 0) |
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newOffset = 0; |
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newOffset = 0; |
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if (newOffset > ScrollableWidth) |
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if (newOffset > _scrollViewer.ScrollableWidth) |
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newOffset = ScrollableWidth; |
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newOffset = _scrollViewer.ScrollableWidth; |
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SetValue(HorizontalOffsetTargetPropertyKey, newOffset); |
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SetValue(HorizontalOffsetTargetPropertyKey, newOffset); |
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BeginAnimation(ScrollViewerUtils.HorizontalOffsetProperty, null); |
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_scrollViewer.BeginAnimation(ScrollViewerUtils.HorizontalOffsetProperty, null); |
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if (!EnableScrollingAnimation || isTouchpadScrolling) |
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if (!EnableScrollingAnimation || isTouchpadScrolling) |
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{ |
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{ |
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ScrollToHorizontalOffset(newOffset); |
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_scrollViewer.ScrollToHorizontalOffset(newOffset); |
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} |
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} |
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else |
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else |
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{ |
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{ |
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var diff = newOffset - HorizontalOffset; |
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var diff = newOffset - _scrollViewer.HorizontalOffset; |
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var absDiff = Math.Abs(diff); |
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var absDiff = Math.Abs(diff); |
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var duration = ScrollingAnimationDuration; |
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var duration = ScrollingAnimationDuration; |
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if (absDiff < Mouse.MouseWheelDeltaForOneLine) |
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if (absDiff < Mouse.MouseWheelDeltaForOneLine) |
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@ -183,14 +220,14 @@ namespace EleCho.WpfSuite |
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DoubleAnimation doubleAnimation = new DoubleAnimation() { |
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DoubleAnimation doubleAnimation = new DoubleAnimation() { |
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EasingFunction = _scrollingAnimationEase, |
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EasingFunction = _scrollingAnimationEase, |
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Duration = duration, |
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Duration = duration, |
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From = HorizontalOffset, |
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From = _scrollViewer.HorizontalOffset, |
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To = newOffset, |
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To = newOffset, |
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}; |
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}; |
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doubleAnimation.Completed += DoubleAnimation_Completed; |
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doubleAnimation.Completed += DoubleAnimation_Completed; |
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_animationRunning = true; |
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_animationRunning = true; |
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BeginAnimation(ScrollViewerUtils.HorizontalOffsetProperty, doubleAnimation, HandoffBehavior.SnapshotAndReplace); |
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_scrollViewer.BeginAnimation(ScrollViewerUtils.HorizontalOffsetProperty, doubleAnimation, HandoffBehavior.SnapshotAndReplace); |
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} |
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} |
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_lastHorizontalScrollingDelta = e.Delta; |
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_lastHorizontalScrollingDelta = e.Delta; |
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@ -207,21 +244,6 @@ namespace EleCho.WpfSuite |
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_animationRunning = false; |
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_animationRunning = false; |
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} |
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} |
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/// <inheritdoc/>
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protected override void OnMouseWheel(MouseWheelEventArgs e) |
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{ |
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if (!ScrollWithWheelDelta) |
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{ |
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base.OnMouseWheel(e); |
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} |
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else |
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{ |
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Debug.WriteLine(e.Delta); |
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CoreScrollWithWheelDelta(e); |
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} |
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} |
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/// <summary>
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/// <summary>
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/// The horizontal offset of scrolling target
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/// The horizontal offset of scrolling target
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/// </summary>
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/// </summary>
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@ -297,13 +319,13 @@ namespace EleCho.WpfSuite |
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/// The key needed set a read-only property
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/// The key needed set a read-only property
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/// </summary>
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/// </summary>
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public static readonly DependencyPropertyKey HorizontalOffsetTargetPropertyKey = |
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public static readonly DependencyPropertyKey HorizontalOffsetTargetPropertyKey = |
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DependencyProperty.RegisterReadOnly(nameof(HorizontalOffsetTarget), typeof(double), typeof(ScrollViewer), new PropertyMetadata(0.0)); |
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DependencyProperty.RegisterReadOnly(nameof(HorizontalOffsetTarget), typeof(double), typeof(SmoothScrollingBehavior), new PropertyMetadata(0.0)); |
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/// <summary>
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/// <summary>
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/// The key needed set a read-only property
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/// The key needed set a read-only property
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/// </summary>
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/// </summary>
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public static readonly DependencyPropertyKey VerticalOffsetTargetPropertyKey = |
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public static readonly DependencyPropertyKey VerticalOffsetTargetPropertyKey = |
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DependencyProperty.RegisterReadOnly(nameof(VerticalOffsetTarget), typeof(double), typeof(ScrollViewer), new PropertyMetadata(0.0)); |
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DependencyProperty.RegisterReadOnly(nameof(VerticalOffsetTarget), typeof(double), typeof(SmoothScrollingBehavior), new PropertyMetadata(0.0)); |
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/// <summary>
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/// <summary>
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/// The key needed set a read-only property
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/// The key needed set a read-only property
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@ -405,40 +427,40 @@ namespace EleCho.WpfSuite |
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/// The DependencyProperty of <see cref="ScrollWithWheelDelta"/> property.
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/// The DependencyProperty of <see cref="ScrollWithWheelDelta"/> property.
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/// </summary>
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/// </summary>
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public static readonly DependencyProperty ScrollWithWheelDeltaProperty = |
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public static readonly DependencyProperty ScrollWithWheelDeltaProperty = |
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DependencyProperty.RegisterAttached(nameof(ScrollWithWheelDelta), typeof(bool), typeof(ScrollViewer), |
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DependencyProperty.RegisterAttached(nameof(ScrollWithWheelDelta), typeof(bool), typeof(SmoothScrollingBehavior), |
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new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.Inherits)); |
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new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.Inherits)); |
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/// <summary>
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/// <summary>
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/// The DependencyProperty of <see cref="EnableScrollingAnimation"/> property.
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/// The DependencyProperty of <see cref="EnableScrollingAnimation"/> property.
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/// </summary>
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/// </summary>
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public static readonly DependencyProperty EnableScrollingAnimationProperty = |
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public static readonly DependencyProperty EnableScrollingAnimationProperty = |
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DependencyProperty.RegisterAttached(nameof(EnableScrollingAnimation), typeof(bool), typeof(ScrollViewer), |
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DependencyProperty.RegisterAttached(nameof(EnableScrollingAnimation), typeof(bool), typeof(SmoothScrollingBehavior), |
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new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.Inherits)); |
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new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.Inherits)); |
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/// <summary>
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/// <summary>
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/// The DependencyProperty of <see cref="ScrollingAnimationDuration"/> property.
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/// The DependencyProperty of <see cref="ScrollingAnimationDuration"/> property.
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/// </summary>
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/// </summary>
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public static readonly DependencyProperty ScrollingAnimationDurationProperty = |
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public static readonly DependencyProperty ScrollingAnimationDurationProperty = |
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DependencyProperty.RegisterAttached(nameof(ScrollingAnimationDuration), typeof(Duration), typeof(ScrollViewer), |
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DependencyProperty.RegisterAttached(nameof(ScrollingAnimationDuration), typeof(Duration), typeof(SmoothScrollingBehavior), |
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new FrameworkPropertyMetadata(new Duration(TimeSpan.FromMilliseconds(250)), FrameworkPropertyMetadataOptions.Inherits), ValidateScrollingAnimationDuration); |
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new FrameworkPropertyMetadata(new Duration(TimeSpan.FromMilliseconds(250)), FrameworkPropertyMetadataOptions.Inherits), ValidateScrollingAnimationDuration); |
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/// <summary>
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/// <summary>
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/// The DependencyProperty of <see cref="AlwaysHandleMouseWheelScrolling"/> property
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/// The DependencyProperty of <see cref="AlwaysHandleMouseWheelScrolling"/> property
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/// </summary>
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/// </summary>
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public static readonly DependencyProperty AlwaysHandleMouseWheelScrollingProperty = |
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public static readonly DependencyProperty AlwaysHandleMouseWheelScrollingProperty = |
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DependencyProperty.RegisterAttached(nameof(AlwaysHandleMouseWheelScrolling), typeof(bool), typeof(ScrollViewer), new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.Inherits)); |
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DependencyProperty.RegisterAttached(nameof(AlwaysHandleMouseWheelScrolling), typeof(bool), typeof(SmoothScrollingBehavior), new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.Inherits)); |
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/// <summary>
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/// <summary>
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/// The DependencyProperty of <see cref="MouseScrollDeltaFactor"/> property
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/// The DependencyProperty of <see cref="MouseScrollDeltaFactor"/> property
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/// </summary>
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/// </summary>
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public static readonly DependencyProperty MouseScrollDeltaFactorProperty = |
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public static readonly DependencyProperty MouseScrollDeltaFactorProperty = |
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DependencyProperty.Register(nameof(MouseScrollDeltaFactor), typeof(double), typeof(ScrollViewer), new PropertyMetadata(1.0)); |
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DependencyProperty.Register(nameof(MouseScrollDeltaFactor), typeof(double), typeof(SmoothScrollingBehavior), new PropertyMetadata(1.0)); |
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/// <summary>
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/// <summary>
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/// The DependencyProperty of <see cref="TouchpadScrollDeltaFactor"/> property
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/// The DependencyProperty of <see cref="TouchpadScrollDeltaFactor"/> property
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/// </summary>
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/// </summary>
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public static readonly DependencyProperty TouchpadScrollDeltaFactorProperty = |
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public static readonly DependencyProperty TouchpadScrollDeltaFactorProperty = |
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DependencyProperty.Register(nameof(TouchpadScrollDeltaFactor), typeof(double), typeof(ScrollViewer), new PropertyMetadata(1.0)); |
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DependencyProperty.Register(nameof(TouchpadScrollDeltaFactor), typeof(double), typeof(SmoothScrollingBehavior), new PropertyMetadata(1.0)); |
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private static bool ValidateScrollingAnimationDuration(object value) |
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|
|
private static bool ValidateScrollingAnimationDuration(object value) |
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|
|
=> value is Duration duration && duration.HasTimeSpan; |
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|
|
=> value is Duration duration && duration.HasTimeSpan; |
SlimeNull
11 months ago