Truncate string with ellipsis in the middle (Qt)

gistfile1.cpp

#include <QString>
#include <cmath>

namespace {

const QString ELLIPSIS("...");

}

QString limitString(const QString& aString, int maxLength) {
    if (aString.length() <= maxLength)
        return aString;

    float spacePerPart = (maxLength - ELLIPSIS.length()) / 2.0;
    auto beforeEllipsis = aString.left(std::ceil(spacePerPart));
    auto afterEllipsis = aString.right(std::floor(spacePerPart));

    return beforeEllipsis + ELLIPSIS + afterEllipsis;
}

Qt provides this out of the box: http://doc.qt.io/archives/qt-4.8/qfontmetricsf.html#elidedText
It is based on fontmetric not text length which might be more useful depending on the case.