protected override Size ArrangeOverride(Size finalSize)
{
AdornerLayer.Arrange(new Rect(finalSize));
if (TemplateChild != null)
{
if (delegateScrollInfo == innerScrollInfo)
{
Size finalScrollSize = new Size(CanHorizontallyScroll ? Double.PositiveInfinity : finalSize.Width, CanVerticallyScroll ? Double.PositiveInfinity : finalSize.Height);
Size childFinalSize = TemplateChild.DesiredSize.Bounds(finalSize, finalScrollSize);
Point childOffset = Offset.Bounds(Point.Zero, (childFinalSize - ViewportSize).Max(Size.Zero).ToPoint());
TemplateChild.Arrange(new Rect(-childOffset, childFinalSize));
}
else
{
// CanContentScroll and Content implements IScrollInfo
TemplateChild.Arrange(new Rect(finalSize));
}
}
innerScrollInfo.ExtentSize = TemplateChild != null ? TemplateChild.VisualSize : Size.Zero;
innerScrollInfo.ViewportSize = finalSize;
return(finalSize);
}
