111 lines
3.4 KiB
C#
111 lines
3.4 KiB
C#
using Avalonia.Animation.Easings;
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using Avalonia.Animation;
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using Avalonia;
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using Avalonia.Controls;
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using Avalonia.Xaml.Interactivity;
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using Irihi.Avalonia.Shared.Helpers;
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using Avalonia.Controls.Presenters;
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using Avalonia.Data;
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using Avalonia.Media;
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using Avalonia.Styling;
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namespace Plugin.Cowain.Wcs.Controls;
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public class GridColumnAnimationBehavior : Behavior<Grid>
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{
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private IDisposable? _columnSubscription;
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public static readonly StyledProperty<int> GridColumnProperty =
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AvaloniaProperty.Register<GridColumnAnimationBehavior, int>(
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nameof(GridColumn),
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defaultBindingMode: BindingMode.TwoWay);
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public int GridColumn
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{
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get => GetValue(GridColumnProperty);
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set => SetValue(GridColumnProperty, value);
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}
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protected override void OnAttached()
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{
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base.OnAttached();
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if (AssociatedObject is not null)
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{
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// 开始监听布局更新或直接触发初始动画
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AssociatedObject.AttachedToVisualTree += HandleAttached;
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}
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}
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protected override void OnDetaching()
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{
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if (AssociatedObject is not null)
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{
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AssociatedObject.AttachedToVisualTree -= HandleAttached;
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}
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_columnSubscription?.Dispose();
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base.OnDetaching();
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}
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private void HandleAttached(object? sender, VisualTreeAttachmentEventArgs e)
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{
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if (AssociatedObject is Grid grid && grid.Parent is ContentPresenter contentPresenter)
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{
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// 使用绑定监听Grid.Column变化
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_columnSubscription = contentPresenter.GetObservable(Grid.ColumnProperty)
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.Subscribe(column =>
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{
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if (column != GridColumn)
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{
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AnimateColumnChange(grid, column, GridColumn);
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}
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});
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}
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}
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private void AnimateColumnChange(Grid grid, int fromColumn, int toColumn)
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{
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var contentPresenter = grid.Parent as ContentPresenter;
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if (contentPresenter == null) return;
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// 创建水平移动动画
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var transform = new TranslateTransform();
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contentPresenter.RenderTransform = transform;
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var _animation = new Animation
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{
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Duration = TimeSpan.FromSeconds(0.3),
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Easing = new CubicEaseInOut(),
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Children =
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{
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new KeyFrame
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{
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Cue = new Cue(0d),
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Setters =
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{
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new Setter
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{
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Property = TranslateTransform.XProperty,
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Value = fromColumn * -grid.ColumnDefinitions[fromColumn].ActualWidth
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}
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}
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},
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new KeyFrame
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{
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Cue = new Cue(1d),
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Setters =
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{
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new Setter
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{
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Property = TranslateTransform.XProperty,
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Value = toColumn * -grid.ColumnDefinitions[toColumn].ActualWidth
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}
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}
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}
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}
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};
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_animation.RunAsync(contentPresenter);
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}
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} |
