ElementRangeSize
float width = hLayoutInfo->ElementRangeSize(itemDimensions.x,
float height = vLayoutInfo->ElementRangeSize(itemDimensions.y,
hLayoutInfo->ElementRangeSize(itemDimensions.x,
return fTarget->ElementRangeSize(fElements[element], length);
virtual float ElementRangeSize(int32 position, int32 length);