Warning, file /plasma/oxygen/kdecoration/oxygendecohelper.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /*
     SPDX-FileCopyrightText: 2013 Hugo Pereira Da Costa <hugo.pereira@free.fr>
     SPDX-FileCopyrightText: 2008 Long Huynh Huu <long.upcase@googlemail.com>
     SPDX-FileCopyrightText: 2007 Matthew Woehlke <mw_triad@users.sourceforge.net>
     SPDX-FileCopyrightText: 2007 Casper Boemann <cbr@boemann.dk>
     SPDX-FileCopyrightText: 2015 David Edmundson <davidedmundson@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #include "oxygendecohelper.h"
 
 #include <KColorUtils>
 #include <QPainter>
 
 #include <cmath>
 
 namespace Oxygen
 {
 
 //______________________________________________________________________________
 DecoHelper::DecoHelper()
     : Helper(KSharedConfig::openConfig(QStringLiteral("oxygenrc")))
 {
 }
 
 //______________________________________________________________________________
 void DecoHelper::invalidateCaches(void)
 {
     // base class call
     Helper::invalidateCaches();
 
     // local caches
     _windecoButtonCache.clear();
 }
 
 //______________________________________________________________________________
 QPixmap DecoHelper::windecoButton(const QColor &color, const QColor &glow, bool sunken, int size)
 {
     Oxygen::Cache<QPixmap>::Value cache(_windecoButtonCache.get(color));
 
     const quint64 key((colorKey(glow) << 32) | (sunken << 23) | size);
 
     if (QPixmap *cachedPixmap = cache->object(key)) {
         return *cachedPixmap;
     }
 
     QPixmap pixmap(size, size);
     pixmap.fill(Qt::transparent);
 
     QPainter p(&pixmap);
     p.setRenderHints(QPainter::Antialiasing);
     p.setPen(Qt::NoPen);
     p.setWindow(0, 0, 21, 21);
 
     // button shadow
     if (color.isValid()) {
         p.save();
         p.translate(0, -0.2);
         drawShadow(p, calcShadowColor(color), 21);
         p.restore();
     }
 
     // button glow
     if (glow.isValid()) {
         p.save();
         p.translate(0, -0.2);
         drawOuterGlow(p, glow, 21);
         p.restore();
     }
 
     // button slab
     p.translate(0, 1);
     p.setWindow(0, 0, 18, 18);
     if (color.isValid()) {
         p.translate(0, (0.5 - 0.668));
 
         const QColor light(calcLightColor(color));
         const QColor dark(calcDarkColor(color));
 
         {
             // plain background
             QLinearGradient lg(0, 1.665, 0, (12.33 + 1.665));
             if (sunken) {
                 lg.setColorAt(1, light);
                 lg.setColorAt(0, dark);
             } else {
                 lg.setColorAt(0, light);
                 lg.setColorAt(1, dark);
             }
 
             const QRectF r(0.5 * (18 - 12.33), 1.665, 12.33, 12.33);
             p.setBrush(lg);
             p.drawEllipse(r);
         }
 
         {
             // outline circle
             const qreal penWidth(0.7);
             QLinearGradient lg(0, 1.665, 0, (2.0 * 12.33 + 1.665));
             lg.setColorAt(0, light);
             lg.setColorAt(1, dark);
             const QRectF r(0.5 * (18 - 12.33 + penWidth), (1.665 + penWidth), (12.33 - penWidth), (12.33 - penWidth));
             p.setPen(QPen(lg, penWidth));
             p.setBrush(Qt::NoBrush);
             p.drawEllipse(r);
         }
     }
 
     p.end();
     cache->insert(key, new QPixmap(pixmap));
 
     return pixmap;
 }
 }