Method drawPicker

dependencies/ColorWheel/ColorWheel.cpp:431–463

}

void ColorWheel::drawPicker(const QColor &color)
{
    QPainter painter(&wheel);
    painter.setRenderHint(QPainter::Antialiasing);
    QPen pen;

    // region of the widget
    int w = qMin(width(), height());

    // radius of outer circle
    qreal r = w/2-margin;

    // radius of inner circle
    qreal ir = r-wheelWidth;

    // left corner of square
    qreal m = w/2.0-ir/qSqrt(2);

    painter.translate(x_offset + m-5, y_offset + m-5);

    qreal SquareWidth = 2*ir/qSqrt(2);
    qreal S = color.saturationF()*SquareWidth;
    qreal V = color.valueF()*SquareWidth;

    if(color.saturation() > 30 ||color.value() < 50)
    {
        pen.setColor(Qt::white);
    }

    pen.setWidth(3);
    painter.setPen(pen);
    painter.drawEllipse(S,V,10,10);
}

void ColorWheel::composeWheel()
{