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Dark mode: make scrollbar more visible with higher contrast and rounded corners

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Kovid Goyal 2024-10-30 14:54:30 +05:30
parent f2f2518cbb
commit cb2d257555
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1 changed files with 70 additions and 2 deletions
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72
src/calibre/gui2/progress_indicator/CalibreStyle.cpp
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@ -82,8 +82,8 @@ static QPixmap styleCachePixmap(const QSize &size)
}
static void draw_arrow(Qt::ArrowType type, QPainter *painter, const QStyleOption *option, const QRect &rect, const QColor &color)
{
static void
draw_arrow(Qt::ArrowType type, QPainter *painter, const QStyleOption *option, const QRect &rect, const QColor &color) {
if (rect.isEmpty())
return;
@ -208,6 +208,74 @@ void CalibreStyle::drawComplexControl(ComplexControl control, const QStyleOption
return QProxyStyle::drawComplexControl(control, &opt, painter, widget);
}
break; /// }}}
case CC_ScrollBar: {
const QStyleOptionSlider *scroll_bar = qstyleoption_cast<const QStyleOptionSlider *>(option);
if (scroll_bar && is_color_dark(option->palette.color(QPalette::Window))) {
bool horizontal = scroll_bar->orientation == Qt::Horizontal;
QColor outline = option->palette.window().color().darker(140);
QColor alphaOutline = outline;
alphaOutline.setAlpha(180);
QRect scrollBarSubLine = subControlRect(control, scroll_bar, SC_ScrollBarSubLine, widget);
QRect scrollBarAddLine = subControlRect(control, scroll_bar, SC_ScrollBarAddLine, widget);
QRect scrollBarSlider = subControlRect(control, scroll_bar, SC_ScrollBarSlider, widget);
QRect scrollBarGroove = subControlRect(control, scroll_bar, SC_ScrollBarGroove, widget);
QRect rect = option->rect;
{ // Paint groove
QLinearGradient gradient(rect.center().x(), rect.top(), rect.center().x(), rect.bottom());
if (!horizontal) gradient = QLinearGradient(rect.left(), rect.center().y(), rect.right(), rect.center().y());
QColor buttonColor = option->palette.color(QPalette::Button);
gradient.setColorAt(0, buttonColor.darker(107));
gradient.setColorAt(0.1, buttonColor.darker(105));
gradient.setColorAt(0.9, buttonColor.darker(105));
gradient.setColorAt(1, buttonColor.darker(107));
painter->save();
painter->setPen(Qt::NoPen);
painter->fillRect(rect, gradient);
if (horizontal) painter->drawLine(rect.topLeft(), rect.topRight());
else painter->drawLine(rect.topLeft(), rect.bottomLeft());
QColor subtleEdge = alphaOutline;
subtleEdge.setAlpha(40);
painter->setPen(subtleEdge);
painter->setBrush(Qt::NoBrush);
painter->drawRect(scrollBarGroove.adjusted(1, 0, -1, -1));
painter->restore();
}
{ // Paint slider
QLinearGradient gradient(scrollBarSlider.center().x(), scrollBarSlider.top(), scrollBarSlider.center().x(), scrollBarSlider.bottom());
if (!horizontal) gradient = QLinearGradient(scrollBarSlider.left(), scrollBarSlider.center().y(), scrollBarSlider.right(), scrollBarSlider.center().y());
QColor m = option->palette.window().color().lighter(130);
if (option->state & State_MouseOver) {
gradient.setColorAt(0, m.lighter()); gradient.setColorAt(1, m.lighter(175));
} else {
gradient.setColorAt(0, m); gradient.setColorAt(1, m.lighter());
}
painter->save();
painter->setBrush(gradient); painter->setPen(alphaOutline);
painter->drawRoundedRect(QRectF(scrollBarSlider.adjusted(horizontal ? -1 : 0, horizontal ? 0 : -1, horizontal ? 0 : -1, horizontal ? -1 : 0)), 5., 5.);
painter->restore();
}
{ // Paint arrows
QRect upRect = scrollBarSubLine.adjusted(horizontal ? 0 : 1, horizontal ? 1 : 0, horizontal ? -2 : -1, horizontal ? -1 : -2);
Qt::ArrowType arrowType = Qt::UpArrow;
if (horizontal) arrowType = option->direction == Qt::LeftToRight ? Qt::LeftArrow : Qt::RightArrow;
QColor arrowColor = option->palette.windowText().color();
draw_arrow(arrowType, painter, option, upRect, arrowColor);
QRect downRect = scrollBarAddLine.adjusted(1, 1, -1, -1);
arrowType = Qt::DownArrow;
if (horizontal) arrowType = option->direction == Qt::LeftToRight ? Qt::RightArrow : Qt::LeftArrow;
draw_arrow(arrowType, painter, option, downRect, arrowColor);
}
return;
}} break;
default:
break;
}