1 files changed, 108 insertions, 0 deletions
diff --git a/src/quickcontrols/fusion/impl/qquickfusiondial.cpp b/src/quickcontrols/fusion/impl/qquickfusiondial.cpp
new file mode 100644
index 0000000000..99b022726c
--- /dev/null
+++ b/src/quickcontrols/fusion/impl/qquickfusiondial.cpp
@@ -0,0 +1,108 @@
+// 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"