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Viewing changes to kwin/clients/oxygen/helper.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Jonathan Riddell
  • Date: 2007-09-05 20:45:14 UTC
  • Revision ID: james.westby@ubuntu.com-20070905204514-632hhspl0nvrc84i
Tags: upstream-3.93.0
Import upstream version 3.93.0

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kwin/clients/oxygen/helper.cpp
 
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/*
 
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 * Copyright 2007 Matthew Woehlke <mw_triad@users.sourceforge.net>
 
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 *
 
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 * This library is free software; you can redistribute it and/or
 
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 * modify it under the terms of the GNU Library General Public
 
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 * License version 2 as published by the Free Software Foundation.
 
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 *
 
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 * This library is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 
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 * Library General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU Library General Public License
 
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 * along with this library; see the file COPYING.LIB.  If not, write to
 
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 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 
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 * Boston, MA 02110-1301, USA.
 
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 */
 
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#include "helper.h"
 
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#include <KColorUtils>
 
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#include <QtGui/QPainter>
 
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#include <math.h>
 
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OxygenWindecoHelper::OxygenWindecoHelper(const QByteArray &componentName)
 
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    : OxygenHelper(componentName)
 
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{
 
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    m_windecoButtonCache.setMaxCost(64);
 
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}
 
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QPixmap OxygenWindecoHelper::windecoButton(const QColor &color, int size)
 
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{
 
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    quint64 key = (quint64(color.rgba()) << 32) | size;
 
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    QPixmap *pixmap = m_windecoButtonCache.object(key);
 
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    if (!pixmap)
 
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    {
 
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        pixmap = new QPixmap(size, (int)ceil(double(size)*10.0/9.0));
 
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        pixmap->fill(QColor(0,0,0,0));
 
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        QPainter p(pixmap);
 
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        p.setRenderHints(QPainter::Antialiasing);
 
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        p.setPen(Qt::NoPen);
 
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        p.setWindow(0,0,18,20);
 
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        QColor light = calcLightColor(color);
 
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        QColor dark = calcDarkColor(color);
 
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        // shadow
 
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        drawShadow(p, calcShadowColor(color), 18);
 
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        // bevel
 
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        qreal y = KColorUtils::luma(color);
 
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        qreal yl = KColorUtils::luma(light);
 
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        qreal yd = KColorUtils::luma(light);
 
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        QLinearGradient bevelGradient(0, 0, 0, 18);
 
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        bevelGradient.setColorAt(0.45, light);
 
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        bevelGradient.setColorAt(0.80, dark);
 
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        if (y < yl && y > yd) // no middle when color is very light/dark
 
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            bevelGradient.setColorAt(0.55, color);
 
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        p.setBrush(QBrush(bevelGradient));
 
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        p.drawEllipse(QRectF(2.0,2.0,14.0,14.0));
 
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        // inside mask
 
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        QRadialGradient maskGradient(9,9,7,9,9);
 
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        maskGradient.setColorAt(0.70, QColor(0,0,0,0));
 
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        maskGradient.setColorAt(0.85, QColor(0,0,0,140));
 
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        maskGradient.setColorAt(0.95, QColor(0,0,0,255));
 
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        p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
 
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        p.setBrush(maskGradient);
 
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        p.drawRect(0,0,20,20);
 
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        // inside
 
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        QLinearGradient innerGradient(0, 3, 0, 15);
 
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        innerGradient.setColorAt(0.0, color);
 
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        innerGradient.setColorAt(1.0, light);
 
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        p.setCompositionMode(QPainter::CompositionMode_DestinationOver);
 
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        p.setBrush(innerGradient);
 
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        p.drawEllipse(QRectF(2.0,2.0,14.0,14.0));
 
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        // anti-shadow
 
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        QRadialGradient highlightGradient(9,8.5,8,9,8.5);
 
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        highlightGradient.setColorAt(0.85, alphaColor(light, 0.0));
 
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        highlightGradient.setColorAt(1.00, light);
 
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        p.setCompositionMode(QPainter::CompositionMode_SourceOver);
 
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        p.setBrush(highlightGradient);
 
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        p.drawEllipse(QRectF(2.0,2.0,14.0,14.0));
 
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        m_windecoButtonCache.insert(key, pixmap);
 
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    }
 
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    return *pixmap;
 
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}