internal static ConnectedAnimationAdorner FindFrom([NotNull] Visual visual)
{
if (Window.GetWindow(visual)?.Content is UIElement root)
{
var layer = AdornerLayer.GetAdornerLayer(root);
if (layer != null)
{
var adorner = layer.GetAdorners(root)?.OfType <ConnectedAnimationAdorner>().FirstOrDefault();
if (adorner == null)
{
adorner = new ConnectedAnimationAdorner(root);
layer.Add(adorner);
}
return(adorner);
}
}
throw new InvalidOperationException("指定的 Visual 尚未连接到可见的视觉树中，找不到用于承载动画的容器。");
}
public bool TryStart([NotNull] UIElement destination, [NotNull] IEnumerable <UIElement> coordinatedElements)
{
if (destination == null)
{
throw new ArgumentNullException(nameof(destination));
}
if (coordinatedElements == null)
{
throw new ArgumentNullException(nameof(coordinatedElements));
}
if (Equals(_source, destination))
{
return(false);
}
// 正在播动画？动画播完废弃了？false
// 准备播放连接动画。
var adorner = ConnectedAnimationAdorner.FindFrom(destination);
var connectionHost = new ConnectedVisual(_source, destination);
adorner.Children.Add(connectionHost);
var storyboard = new Storyboard();
var animation = new DoubleAnimation(0.0, 1.0, new Duration(TimeSpan.FromSeconds(10.6)))
{
EasingFunction = new CubicEase {
EasingMode = EasingMode.EaseInOut
},
};
Storyboard.SetTarget(animation, connectionHost);
Storyboard.SetTargetProperty(animation, new PropertyPath(ConnectedVisual.ProgressProperty.Name));
storyboard.Children.Add(animation);
storyboard.Completed += (sender, args) =>
{
_reportCompleted(this, EventArgs.Empty);
//destination.ClearValue(UIElement.VisibilityProperty);
adorner.Children.Remove(connectionHost);
};
//destination.Visibility = Visibility.Hidden;
storyboard.Begin();
return(true);
}