void drawDial(const QStyleOptionSlider *option, QPainter *painter)
{
QPalette pal = option->palette;
QColor buttonColor = pal.button().color();
const int width = option->rect.width();
const int height = option->rect.height();
const bool enabled = option->state & QStyle::State_Enabled;
qreal r = qMin(width, height) / 2;
r -= r/50;
const qreal penSize = r/20.0;
painter->save();
// Draw notches
if (option->subControls & QStyle::SC_DialTickmarks) {
painter->setPen(option->palette.dark().color().darker(120));
painter->drawLines(QStyleHelper::calcLines(option));
}
// Cache dial background
BEGIN_STYLE_PIXMAPCACHE(QString::fromLatin1("qdial"));
const qreal d_ = r / 6;
const qreal dx = option->rect.x() + d_ + (width - 2 * r) / 2 + 1;
const qreal dy = option->rect.y() + d_ + (height - 2 * r) / 2 + 1;
QRectF br = QRectF(dx + 0.5, dy + 0.5,
int(r * 2 - 2 * d_ - 2),
int(r * 2 - 2 * d_ - 2));
buttonColor.setHsv(buttonColor .hue(),
qMin(140, buttonColor .saturation()),
qMax(180, buttonColor.value()));
QColor shadowColor(0, 0, 0, 20);
if (enabled) {
// Drop shadow
qreal shadowSize = qMax(1.0, penSize/2.0);
QRectF shadowRect= br.adjusted(-2*shadowSize, -2*shadowSize,
2*shadowSize, 2*shadowSize);
QRadialGradient shadowGradient(shadowRect.center().x(),
shadowRect.center().y(), shadowRect.width()/2.0,
shadowRect.center().x(), shadowRect.center().y());
shadowGradient.setColorAt(qreal(0.91), QColor(0, 0, 0, 40));
shadowGradient.setColorAt(qreal(1.0), Qt::transparent);
p->setBrush(shadowGradient);
p->setPen(Qt::NoPen);
p->translate(shadowSize, shadowSize);
p->drawEllipse(shadowRect);
p->translate(-shadowSize, -shadowSize);
// Main gradient
QRadialGradient gradient(br.center().x() - br.width()/3, dy,
br.width()*1.3, br.center().x(),
br.center().y() - br.height()/2);
gradient.setColorAt(0, buttonColor.lighter(110));
gradient.setColorAt(qreal(0.5), buttonColor);
gradient.setColorAt(qreal(0.501), buttonColor.darker(102));
gradient.setColorAt(1, buttonColor.darker(115));
p->setBrush(gradient);
} else {
p->setBrush(Qt::NoBrush);
}
p->setPen(QPen(buttonColor.darker(280)));
p->drawEllipse(br);
p->setBrush(Qt::NoBrush);
p->setPen(buttonColor.lighter(110));
p->drawEllipse(br.adjusted(1, 1, -1, -1));
if (option->state & QStyle::State_HasFocus) {
QColor highlight = pal.highlight().color();
highlight.setHsv(highlight.hue(),
qMin(160, highlight.saturation()),
qMax(230, highlight.value()));
highlight.setAlpha(127);
p->setPen(QPen(highlight, 2.0));
p->setBrush(Qt::NoBrush);
p->drawEllipse(br.adjusted(-1, -1, 1, 1));
}
END_STYLE_PIXMAPCACHE
QPointF dp = calcRadialPos(option, qreal(0.70));
buttonColor = buttonColor.lighter(104);
buttonColor.setAlphaF(qreal(0.8));
const qreal ds = r/qreal(7.0);
QRectF dialRect(dp.x() - ds, dp.y() - ds, 2*ds, 2*ds);
QRadialGradient dialGradient(dialRect.center().x() + dialRect.width()/2,
dialRect.center().y() + dialRect.width(),
dialRect.width()*2,
dialRect.center().x(), dialRect.center().y());
dialGradient.setColorAt(1, buttonColor.darker(140));
dialGradient.setColorAt(qreal(0.4), buttonColor.darker(120));
dialGradient.setColorAt(0, buttonColor.darker(110));
if (penSize > 3.0) {
painter->setPen(QPen(QColor(0, 0, 0, 25), penSize));
painter->drawLine(calcRadialPos(option, qreal(0.90)), calcRadialPos(option, qreal(0.96)));
}
painter->setBrush(dialGradient);
painter->setPen(QColor(255, 255, 255, 150));
painter->drawEllipse(dialRect.adjusted(-1, -1, 1, 1));
painter->setPen(QColor(0, 0, 0, 80));
painter->drawEllipse(dialRect);
painter->restore();
}
static
void drawDial ( const QStyleOptionSlider *option, QPainter *painter )
{
QPalette pal = option->palette;
QColor buttonColor = pal.button().color();
const int width = option->rect.width();
const int height = option->rect.height();
const bool enabled = option->state & QStyle::State_Enabled;
qreal r = qMin(width, height) / 2;
r -= r/50;
const qreal penSize = r/20.0;
painter->save();
painter->setRenderHint(QPainter::Antialiasing);
// Draw notches
if (option->subControls & QStyle::SC_DialTickmarks) {
painter->setPen(option->palette.dark().color().darker(120));
painter->drawLines(calcLines(option));
}
// Cache dial background
QString a = QString::fromLatin1("qdial");
QRect rect = option->rect;
QPixmap internalPixmapCache;
QImage imageCache;
QPainter *p = painter;
QString unique = uniqueName((a), option, option->rect.size());
int txType = painter->deviceTransform().type() | painter->worldTransform().type();
bool doPixmapCache = txType <= QTransform::TxTranslate;
if (doPixmapCache && QPixmapCache::find(unique, internalPixmapCache)) {
painter->drawPixmap(option->rect.topLeft(), internalPixmapCache);
} else {
if (doPixmapCache) {
rect.setRect(0, 0, option->rect.width(), option->rect.height());
imageCache = QImage(option->rect.size(), QImage::Format_ARGB32_Premultiplied);
imageCache.fill(0);
p = new QPainter(&imageCache);
}
//--BEGIN_STYLE_PIXMAPCACHE(QString::fromLatin1("qdial"));
p->setRenderHint(QPainter::Antialiasing);
const qreal d_ = r / 6;
const qreal dx = option->rect.x() + d_ + (width - 2 * r) / 2 + 1;
const qreal dy = option->rect.y() + d_ + (height - 2 * r) / 2 + 1;
QRectF br = QRectF(dx + 0.5, dy + 0.5,
int(r * 2 - 2 * d_ - 2),
int(r * 2 - 2 * d_ - 2));
buttonColor.setHsv(buttonColor .hue(),
qMin(140, buttonColor .saturation()),
qMax(180, buttonColor.value()));
QColor shadowColor(0, 0, 0, 20);
if (enabled) {
// Drop shadow
qreal shadowSize = qMax(1.0, penSize/2.0);
QRectF shadowRect= br.adjusted(-2*shadowSize, -2*shadowSize,
2*shadowSize, 2*shadowSize);
QRadialGradient shadowGradient(shadowRect.center().x(),
shadowRect.center().y(), shadowRect.width()/2.0,
shadowRect.center().x(), shadowRect.center().y());
shadowGradient.setColorAt(qreal(0.91), QColor(0, 0, 0, 40));
shadowGradient.setColorAt(qreal(1.0), Qt::transparent);
p->setBrush(shadowGradient);
p->setPen(Qt::NoPen);
p->translate(shadowSize, shadowSize);
p->drawEllipse(shadowRect);
p->translate(-shadowSize, -shadowSize);
// Main gradient
QRadialGradient gradient(br.center().x() - br.width()/3, dy,
br.width()*1.3, br.center().x(),
br.center().y() - br.height()/2);
gradient.setColorAt(0, buttonColor.lighter(110));
gradient.setColorAt(qreal(0.5), buttonColor);
gradient.setColorAt(qreal(0.501), buttonColor.darker(102));
gradient.setColorAt(1, buttonColor.darker(115));
p->setBrush(gradient);
} else {
p->setBrush(Qt::NoBrush);
}
p->setPen(QPen(buttonColor.darker(280)));
p->drawEllipse(br);
p->setBrush(Qt::NoBrush);
p->setPen(buttonColor.lighter(110));
p->drawEllipse(br.adjusted(1, 1, -1, -1));
if (option->state & QStyle::State_HasFocus) {
QColor highlight = pal.highlight().color();
highlight.setHsv(highlight.hue(),
qMin(160, highlight.saturation()),
qMax(230, highlight.value()));
highlight.setAlpha(127);
p->setPen(QPen(highlight, 2.0));
p->setBrush(Qt::NoBrush);
p->drawEllipse(br.adjusted(-1, -1, 1, 1));
}
//--END_STYLE_PIXMAPCACHE
if (doPixmapCache) {
p->end();
delete p;
internalPixmapCache = QPixmap::fromImage(imageCache);
painter->drawPixmap(option->rect.topLeft(), internalPixmapCache);
QPixmapCache::insert(unique, internalPixmapCache);
}
}
QPointF dp = calcRadialPos(option, qreal(0.70));
buttonColor = buttonColor.lighter(104);
buttonColor.setAlphaF(qreal(0.8));
const qreal ds = r/qreal(7.0);
QRectF dialRect(dp.x() - ds, dp.y() - ds, 2*ds, 2*ds);
QRadialGradient dialGradient(dialRect.center().x() + dialRect.width()/2,
dialRect.center().y() + dialRect.width(),
dialRect.width()*2,
dialRect.center().x(), dialRect.center().y());
dialGradient.setColorAt(1, buttonColor.darker(140));
dialGradient.setColorAt(qreal(0.4), buttonColor.darker(120));
dialGradient.setColorAt(0, buttonColor.darker(110));
if (penSize > 3.0) {
painter->setPen(QPen(QColor(0, 0, 0, 25), penSize));
painter->drawLine(calcRadialPos(option, qreal(0.90)), calcRadialPos(option, qreal(0.96)));
}
painter->setBrush(dialGradient);
painter->setPen(QColor(255, 255, 255, 150));
painter->drawEllipse(dialRect.adjusted(-1, -1, 1, 1));
painter->setPen(QColor(0, 0, 0, 80));
painter->drawEllipse(dialRect);
painter->restore();
}