private void ScrollViewer_ViewChanged(object sender, ScrollViewerViewChangedEventArgs e)
{
var transform = TargetView.TransformToVisual(EnclosingView);
var targetY = transform.TransformPoint(new Point(0, 0)).Y;
var tracker = TrackerView;
Windows.UI.Xaml.Controls.Canvas.SetTop(tracker, targetY);
}
private void ScrollViewer_ViewChanged(object sender, ScrollViewerViewChangedEventArgs e)
{
var transform = TargetView.TransformToVisual(EnclosingView);
var target = transform.TransformPoint(new Point(0, 0));
Windows.UI.Xaml.Controls.Canvas.SetLeft(TrackerViewX, target.X);
Windows.UI.Xaml.Controls.Canvas.SetTop(TrackerViewY, target.Y);
OffsetTextBlock.Text = target.ToString();
}