colour hsl_colour::to_rgb(double aAlpha) const
{
double c = (1.0 - std::abs(2.0 * lightness() - 1.0)) * saturation();
double h2 = hue() / 60.0;
double x = c * (1.0 - std::abs(std::fmod(h2, 2.0) - 1.0));
double r, g, b;
if (hue() == undefined_hue())
r = g = b = 0.0;
else if (h2 >= 0.0 && h2 < 1.0)
r = c, g = x, b = 0.0;
else if (h2 >= 1.0 && h2 < 2.0)
r = x, g = c, b = 0.0;
else if (h2 >= 2.0 && h2 < 3.0)
r = 0.0, g = c, b = x;
else if (h2 >= 3.0 && h2 < 4.0)
r = 0.0, g = x, b = c;
else if (h2 >= 4.0 && h2 < 5.0)
r = x, g = 0.0, b = c;
else if (h2 >= 5.0 && h2 < 6.0)
r = c, g = 0.0, b = x;
else
r = g = b = 0.0;
double m = lightness() - 0.5f * c;
colour result(
static_cast<colour::component>(std::floor((r + m) * 255.0)),
static_cast<colour::component>(std::floor((g + m) * 255.0)),
static_cast<colour::component>(std::floor((b + m) * 255.0)),
static_cast<colour::component>(std::floor(aAlpha * 255.0)));
return result;
}
void ItemPinned::paintEvent(QPaintEvent *paintEvent)
{
const auto *parent = parentWidget();
auto color = parent->palette().color(QPalette::Background);
const int lightThreshold = 100;
const bool menuBackgrounIsLight = color.lightness() > lightThreshold;
color.setHsl(
color.hue(),
color.saturation(),
qMax(0, qMin(255, color.lightness() + (menuBackgrounIsLight ? -200 : 50)))
);
QPainter painter(this);
const int border = pointsToPixels(6);
const QRect rect(width() - border, 0, width(), height());
painter.setOpacity(0.15);
painter.fillRect(rect, color);
QWidget::paintEvent(paintEvent);
}
