diff options
Diffstat (limited to 'src/imports/controls/fusion/impl/qquickfusionknob.cpp')
-rw-r--r-- | src/imports/controls/fusion/impl/qquickfusionknob.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/imports/controls/fusion/impl/qquickfusionknob.cpp b/src/imports/controls/fusion/impl/qquickfusionknob.cpp new file mode 100644 index 00000000..a641d190 --- /dev/null +++ b/src/imports/controls/fusion/impl/qquickfusionknob.cpp @@ -0,0 +1,88 @@ +/**************************************************************************** +** +** Copyright (C) 2017 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL3$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPLv3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or later as published by the Free +** Software Foundation and appearing in the file LICENSE.GPL included in +** the packaging of this file. Please review the following information to +** ensure the GNU General Public License version 2.0 requirements will be +** met: http://www.gnu.org/licenses/gpl-2.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qquickfusionknob_p.h" + +#include <QtCore/qmath.h> +#include <QtGui/qpainter.h> +#include <QtQuick/private/qquickpalette_p.h> +#include <QtQuick/private/qquickitem_p.h> + +QT_BEGIN_NAMESPACE + +QQuickFusionKnob::QQuickFusionKnob(QQuickItem *parent) + : QQuickPaintedItem(parent) +{ + connect(this, &QQuickItem::paletteChanged, this, [this](){ update(); }); +} + +// extracted from QStyleHelper::drawDial() +void QQuickFusionKnob::paint(QPainter *painter) +{ + const qreal w = width(); + const qreal h = height(); + if (w <= 0 || h <= 0) + return; + + QColor color = QQuickItemPrivate::get(this)->palette()->button(); + color.setHsv(color.hue(), + qMin(140, color .saturation()), + qMax(180, color.value())); + color = color.lighter(104); + color.setAlphaF(qreal(0.8)); + + const qreal sz = qMin(w, h); + QRectF rect(0, 0, sz, sz); + rect.moveCenter(QPointF(w / 2.0, h / 2.0)); + const QPointF center = rect.center(); + + QRadialGradient gradient(center.x() + rect.width() / 2, + center.y() + rect.width(), + rect.width() * 2, + center.x(), center.y()); + gradient.setColorAt(1, color.darker(140)); + gradient.setColorAt(qreal(0.4), color.darker(120)); + gradient.setColorAt(0, color.darker(110)); + + painter->setRenderHint(QPainter::Antialiasing); + painter->setBrush(gradient); + painter->setPen(QColor(255, 255, 255, 150)); + painter->drawEllipse(rect); + painter->setPen(QColor(0, 0, 0, 80)); + painter->drawEllipse(rect.adjusted(1, 1, -1, -1)); +} + +QT_END_NAMESPACE |