Method paintRadiusDisplay

src/tools/UBGraphicsCompass.cpp:527–564

}

void UBGraphicsCompass::paintRadiusDisplay(QPainter *painter)
{
    double pixelsPerCentimeter = UBApplication::boardController->activeScene()->backgroundGridSize();

    qreal radiusInCentimeters = rect().width() / pixelsPerCentimeter;
    QString format = rect().width() >= sDisplayRadiusUnitMinLength ? "%1 cm" : "%1";
    QString radiusText = QString(format).arg(radiusInCentimeters, 0, 'f', 1);

    bool onPencilArm = rect().width() > sDisplayRadiusOnPencilArmMinLength;

    painter->save();
    painter->setFont(font());
    QFontMetricsF fm(painter->font());
    QPointF textCenter;

    if (onPencilArm)
        textCenter = QPointF(rect().right() - sPencilBaseLength - sPencilLength - fm.horizontalAdvance(radiusText) / 2 - 24 - 8, rect().center().y());
    else
        textCenter = QPointF((rect().left() + sNeedleLength + sNeedleBaseLength + hingeRect().left()) / 2, rect().center().y());

    painter->translate(textCenter);
    qreal angle = angleInDegrees();
    if (angle > 180)
        angle -= 360;
    else if (angle < -180)
        angle += 360;
    if (angle <= -90 || angle > 90)
        painter->rotate(180);
    painter->drawText(
        QRectF(
            - fm.horizontalAdvance(radiusText) / 2,
            - rect().height() / 2,
            fm.horizontalAdvance(radiusText),
            rect().height()),
        Qt::AlignVCenter,
        radiusText);
    painter->restore();
}

QCursor UBGraphicsCompass::moveCursor() const
{