protected override void OnArrange()
{
if (Inner == null)
{
return;
}
var clipShift = new Point(-ClipMargin.Left.AbsoluteOrDefault(), -ClipMargin.Top.AbsoluteOrDefault());
var clipSize = Inner.DesiredSize.Subtract(ClipMargin.GetAbsoluteSize());
var shift = CalculateAlignmentShift(clipSize);
var location = Point.Empty;
location.Offset(clipShift);
location.Offset(shift);
location.Offset(Layout.Location);
Inner.Arrange(new Rectangle(location, Inner.DesiredSize));
var viewRegionSize = Inner.DesiredSize.Subtract(new Size(
ClipMargin.Right.AbsoluteOrDefault(),
ClipMargin.Bottom.AbsoluteOrDefault()))
.Subtract(new Size(Math.Max(0, shift.X), Math.Max(0, shift.Y)));
var clipped = new Rectangle(location, viewRegionSize);
clipped.Intersect(Layout);
ActualViewRegion = clipped;
}
protected override Size OnMeasure(Size size, IRendererContext context)
{
if (Inner == null)
{
return(Size.Empty);
}
var marginSize = ClipMargin.GetAbsoluteSize();
Inner.Measure(size.Add(marginSize), context);
return(Inner.DesiredSize.Subtract(marginSize));
}