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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qquickfusiondial_p.h"
#include <QtGui/qpainter.h>
#include <QtGui/private/qmath_p.h>
#include <QtQuick/private/qquickpalette_p.h>
#include <QtQuick/private/qquickitem_p.h>
QT_BEGIN_NAMESPACE
QQuickFusionDial::QQuickFusionDial(QQuickItem *parent)
: QQuickPaintedItem(parent)
{
}
bool QQuickFusionDial::highlight() const
{
return m_highlight;
}
void QQuickFusionDial::setHighlight(bool highlight)
{
if (m_highlight == highlight)
return;
m_highlight = highlight;
update();
}
// based on QStyleHelper::drawDial()
void QQuickFusionDial::paint(QPainter *painter)
{
const int width = QQuickItem::width();
const int height = QQuickItem::height();
if (width <= 0 || height <= 0 || !isVisible())
return;
const bool enabled = isEnabled();
qreal r = qMin(width, height) / 2.0;
r -= r/50;
const qreal penSize = r/20.0;
painter->setRenderHint(QPainter::Antialiasing);
const qreal d_ = r / 6;
const qreal dx = d_ + (width - 2 * r) / 2 + 1;
const qreal dy = 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));
QColor buttonColor = QQuickItemPrivate::get(this)->palette()->button().toHsv();
buttonColor.setHsv(buttonColor .hue(),
qMin(140, buttonColor .saturation()),
qMax(180, buttonColor.value()));
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);
painter->setBrush(shadowGradient);
painter->setPen(Qt::NoPen);
painter->translate(shadowSize, shadowSize);
painter->drawEllipse(shadowRect);
painter->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));
painter->setBrush(gradient);
} else {
painter->setBrush(Qt::NoBrush);
}
painter->setPen(QPen(buttonColor.darker(280)));
painter->drawEllipse(br);
painter->setBrush(Qt::NoBrush);
painter->setPen(buttonColor.lighter(110));
painter->drawEllipse(br.adjusted(1, 1, -1, -1));
if (m_highlight) {
QColor highlight = QQuickItemPrivate::get(this)->palette()->highlight().toHsv();
highlight.setHsv(highlight.hue(),
qMin(160, highlight.saturation()),
qMax(230, highlight.value()));
highlight.setAlpha(127);
painter->setPen(QPen(highlight, 2.0));
painter->setBrush(Qt::NoBrush);
painter->drawEllipse(br.adjusted(-1, -1, 1, 1));
}
}
QT_END_NAMESPACE
#include "moc_qquickfusiondial_p.cpp"
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