protected override List <ElementSite> CaptureOrderedSequence(FrameworkElement source)
{
var stackPanel = GetParentStackPanel(source);
var offset = 0.0;
var elementSites = new List <ElementSite>();
var orientation = stackPanel.Orientation;
var orderedChildren = stackPanel.Children.OfType <FrameworkElement>();
foreach (var child in orderedChildren)
{
var ls = LayoutInformation.GetLayoutSlot(child);
var size = orientation == Orientation.Horizontal ? ls.Width : ls.Height;
var elementSite = new FrameworkElementSite(child, offset, size, orientation);
SetElementSite(child, elementSite);
elementSite.SetDefinitionOffset(offset);
elementSites.Add(elementSite);
offset += size;
}
return(elementSites);
}
private static void SetElementSite(DependencyObject element, FrameworkElementSite value)
{
element.SetValue(ElementSiteProperty, value);
}