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diff --git a/src/imports/controls/fusion/qquickfusionstyle.cpp b/src/imports/controls/fusion/qquickfusionstyle.cpp
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+/****************************************************************************
+**
+** 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 "qquickfusionstyle_p.h"
+
+#include <QtGui/qcolor.h>
+#include <QtGui/qpalette.h>
+#include <QtGui/qpa/qplatformtheme.h>
+#include <QtGui/private/qguiapplication_p.h>
+
+QT_BEGIN_NAMESPACE
+
+// On mac we want a standard blue color used when the system palette is used
+static bool isMacSystemPalette(const QPalette &palette)
+{
+    Q_UNUSED(palette);
+#if defined(Q_OS_MACOS)
+    const QPalette *themePalette = QGuiApplicationPrivate::platformTheme()->palette();
+    if (themePalette && themePalette->color(QPalette::Normal, QPalette::Highlight) ==
+            palette.color(QPalette::Normal, QPalette::Highlight) &&
+        themePalette->color(QPalette::Normal, QPalette::HighlightedText) ==
+            palette.color(QPalette::Normal, QPalette::HighlightedText))
+        return true;
+#endif
+    return false;
+}
+
+QQuickFusionStyle::QQuickFusionStyle(QObject *parent)
+    : QObject(parent)
+{
+}
+
+QColor QQuickFusionStyle::lightShade()
+{
+    return QColor(255, 255, 255, 90);
+}
+
+QColor QQuickFusionStyle::darkShade()
+{
+    return QColor(0, 0, 0, 60);
+}
+
+QColor QQuickFusionStyle::topShadow()
+{
+    return QColor(0, 0, 0, 18);
+}
+
+QColor QQuickFusionStyle::innerContrastLine()
+{
+    return QColor(255, 255, 255, 30);
+}
+
+QColor QQuickFusionStyle::highlight(const QPalette &palette)
+{
+    if (isMacSystemPalette(palette))
+        return QColor(60, 140, 230);
+    return palette.color(QPalette::Highlight);
+}
+
+QColor QQuickFusionStyle::highlightedText(const QPalette &palette)
+{
+    if (isMacSystemPalette(palette))
+        return Qt::white;
+    return palette.color(QPalette::HighlightedText);
+}
+
+QColor QQuickFusionStyle::outline(const QPalette &palette)
+{
+    if (palette.window().style() == Qt::TexturePattern)
+        return QColor(0, 0, 0, 160);
+    return palette.background().color().darker(140);
+}
+
+QColor QQuickFusionStyle::highlightedOutline(const QPalette &palette)
+{
+    QColor highlightedOutline = highlight(palette).darker(125);
+    if (highlightedOutline.value() > 160)
+        highlightedOutline.setHsl(highlightedOutline.hue(), highlightedOutline.saturation(), 160);
+    return highlightedOutline;
+}
+
+QColor QQuickFusionStyle::tabFrameColor(const QPalette &palette)
+{
+    if (palette.window().style() == Qt::TexturePattern)
+        return QColor(255, 255, 255, 8);
+    return buttonColor(palette).lighter(104);
+}
+
+QColor QQuickFusionStyle::buttonColor(const QPalette &palette, bool highlighted, bool down, bool hovered)
+{
+    QColor buttonColor = palette.button().color();
+    int val = qGray(buttonColor.rgb());
+    buttonColor = buttonColor.lighter(100 + qMax(1, (180 - val)/6));
+    buttonColor.setHsv(buttonColor.hue(), buttonColor.saturation() * 0.75, buttonColor.value());
+    if (highlighted)
+        buttonColor = mergedColors(buttonColor, highlightedOutline(palette).lighter(130), 90);
+    if (!hovered)
+        buttonColor = buttonColor.darker(104);
+    if (down)
+        buttonColor = buttonColor.darker(110);
+    return buttonColor;
+}
+
+QColor QQuickFusionStyle::buttonOutline(const QPalette &palette, bool highlighted, bool enabled)
+{
+    QColor darkOutline = enabled && highlighted ? highlightedOutline(palette) : outline(palette);
+    return !enabled ? darkOutline.lighter(115) : darkOutline;
+}
+
+QColor QQuickFusionStyle::gradientStart(const QColor &baseColor)
+{
+    return baseColor.lighter(124);
+}
+
+QColor QQuickFusionStyle::gradientStop(const QColor &baseColor)
+{
+    return baseColor.lighter(102);
+}
+
+QColor QQuickFusionStyle::mergedColors(const QColor &colorA, const QColor &colorB, int factor)
+{
+    const int maxFactor = 100;
+    QColor tmp = colorA;
+    tmp.setRed((tmp.red() * factor) / maxFactor + (colorB.red() * (maxFactor - factor)) / maxFactor);
+    tmp.setGreen((tmp.green() * factor) / maxFactor + (colorB.green() * (maxFactor - factor)) / maxFactor);
+    tmp.setBlue((tmp.blue() * factor) / maxFactor + (colorB.blue() * (maxFactor - factor)) / maxFactor);
+    return tmp;
+}
+
+QColor QQuickFusionStyle::grooveColor(const QPalette &palette)
+{
+    QColor color = buttonColor(palette);
+    color.setHsv(color.hue(),
+                 qMin(255, color.saturation()),
+                 qMin<int>(255, color.value() * 0.9));
+    return color;
+}
+
+QT_END_NAMESPACE