public static Size Measure(IWrapPanel panel, Size availableSize)
{
var orientation = panel.Orientation;
var result = new OrientedSize(orientation);
var lineSize = new OrientedSize(orientation);
var orientedConstraint = new OrientedSize(orientation, availableSize);
var itemWidth = panel.ItemWidth.IsNaN() ? (double?)null : panel.ItemWidth;
var itemHeight = panel.ItemHeight.IsNaN() ? (double?)null : panel.ItemHeight;
var itemConstraintSize = new Size(itemWidth ?? availableSize.Width, itemHeight ?? availableSize.Height);
foreach (var element in panel.Elements)
{
element.Measure(itemConstraintSize);
var elementSize = element.GetDesiredOrientedSize(orientation, itemWidth, itemHeight);
if (orientedConstraint.Direct.IsLessThan(lineSize.Direct + elementSize.Direct, XamlConstants.LayoutComparisonPrecision))
{
result = result.WrapSize(lineSize);
lineSize = elementSize;
if (!orientedConstraint.Direct.IsLessThan(elementSize.Direct, XamlConstants.LayoutComparisonPrecision))
{
continue;
}
result = result.WrapSize(elementSize);
lineSize = new OrientedSize(orientation);
}
else
{
lineSize = lineSize.StackSize(elementSize);
}
}
return(result.WrapSize(lineSize).Size);
}
public static OrientedSize WrapSize(this OrientedSize self, Size itemSize)
{
return(self.WrapSize(itemSize.AsOriented(self.Orientation)));
}
