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kwin'SystemButton (./kdebase/kwin/clients/system/systemclient.h:13)

class SystemButton : public QButton
{
public:
    SystemButton(QWidget *parent=0, const char *name=0,
                 const unsigned char *bitmap=NULL);
    void setBitmap(const unsigned char *bitmap);
    void reset();
    QSize sizeHint() const;
protected:
    virtual void drawButton(QPainter *p);
    void drawButtonLabel(QPainter *){;}
    KPixmap aBackground, iBackground;
    QBitmap deco;
};

kwin'SystemButton::SystemButton() (./kdebase/kwin/clients/laptop/laptopclient.cpp:106)

SystemButton::SystemButton(int w, int h, QWidget *parent, const char *name,
                           const unsigned char *bitmap)
    : QButton(parent, name)
{
    setFixedSize(w, h);
    aBackground.resize(w, h);
    iBackground.resize(w, h);
    reset();
    //resize(22, 12);

    if(bitmap)
        setBitmap(bitmap);
}

/*
QSize SystemButton::sizeHint() const
{
    return(QSize(22, 12));
}*/

kwin'SystemButton::reset() (./kdebase/kwin/clients/laptop/laptopclient.cpp:126)

void SystemButton::reset()
{
    QPainter p;
    int w = width();
    int h = height();
    QColor hColor(options->color(Options::ButtonBg, true));
    QColor lColor(options->color(Options::ButtonBlend, true));

    KPixmapEffect::gradient(aBackground, hColor.light(150), lColor.dark(150),
                            KPixmapEffect::DiagonalGradient);
    p.begin(&aBackground);
    p.setPen(options->colorGroup(Options::ButtonBg, false).dark());
    p.drawLine(0, 0, w-1, 0);
    p.drawLine(0, 0, 0, w-1);
    p.setPen(options->colorGroup(Options::ButtonBg, false).light());
    p.drawLine(w-1, 0, w-1, h-1);
    p.drawLine(0, h-1, w-1, h-1);
    p.end();

    hColor = (options->color(Options::ButtonBg, false));
    lColor = (options->color(Options::ButtonBlend, false));
    KPixmapEffect::gradient(iBackground, hColor.light(150), lColor.dark(150),
                            KPixmapEffect::DiagonalGradient);
    p.begin(&iBackground);
    p.setPen(options->colorGroup(Options::ButtonBg, false).light());
    p.drawLine(0, 0, w-1, 0);
    p.drawLine(0, 0, 0, h-1);
    p.setPen(options->colorGroup(Options::ButtonBg, false).dark());
    p.drawLine(w-1, 0, w-1, h-1);
    p.drawLine(0, h-1, w-1, h-1);
    p.end();


}

kwin'SystemButton::setBitmap() (./kdebase/kwin/clients/laptop/laptopclient.cpp:161)

void SystemButton::setBitmap(const unsigned char *bitmap)
{
    deco = QBitmap(8, 8, bitmap, true);
    deco.setMask(deco);
    repaint();
}

kwin'SystemButton::drawButton() (./kdebase/kwin/clients/laptop/laptopclient.cpp:168)

void SystemButton::drawButton(QPainter *p)
{
    if(isDown())
        p->drawPixmap(0, 0, aBackground);
    else
        p->drawPixmap(0, 0, iBackground);

    p->setPen(options->color(Options::ButtonFg, isDown()));
    int xOff = (width()-8)/2;
    int yOff = (height()-8)/2;
    p->drawPixmap(isDown() ? xOff+1: xOff, isDown() ? yOff+1 : yOff, deco);
}

kwin'SystemButton::SystemButton() (./kdebase/kwin/clients/system/systemclient.cpp:76)

SystemButton::SystemButton(QWidget *parent, const char *name,
                           const unsigned char *bitmap)
    : QButton(parent, name)
{
    aBackground.resize(14, 14);
    iBackground.resize(14, 14);
    reset();
    resize(14, 14);

    if(bitmap)
        setBitmap(bitmap);
}

kwin'SystemButton::sizeHint() (./kdebase/kwin/clients/system/systemclient.cpp:89)

QSize SystemButton::sizeHint() const
{
    return(QSize(14, 14));
}

kwin'SystemButton::reset() (./kdebase/kwin/clients/system/systemclient.cpp:94)

void SystemButton::reset()
{
    QPainter p;
    QColor hColor(options->color(Options::ButtonBg, true));
    QColor lColor(options->color(Options::ButtonBlend, true));

    KPixmapEffect::gradient(aBackground, hColor.light(150), lColor.dark(150),
                            KPixmapEffect::DiagonalGradient);

    hColor = (options->color(Options::ButtonBg, false));
    lColor = (options->color(Options::ButtonBlend, false));
    KPixmapEffect::gradient(iBackground, hColor.light(150), lColor.dark(150),
                            KPixmapEffect::DiagonalGradient);
    

    KPixmap aInternal;
    aInternal.resize(10, 10);
    KPixmap iInternal;
    iInternal.resize(10, 10);
    KPixmapEffect::gradient(iInternal,
                            options->color(Options::ButtonBlend, true),
                            options->color(Options::ButtonBg, true),
                            KPixmapEffect::DiagonalGradient);
    KPixmapEffect::gradient(aInternal,
                            options->color(Options::ButtonBg, false),
                            options->color(Options::ButtonBlend, false),
                            KPixmapEffect::DiagonalGradient);

    p.begin(&iBackground);
    p.drawPixmap(2, 2, iInternal);
    p.setPen(options->color(Options::ButtonBg, false).light(120));
    p.drawLine(0, 13, 13, 13);
    p.drawLine(13, 0, 13, 13);
    p.setPen(options->color(Options::ButtonBlend, false).dark(120));
    p.drawLine(0, 0, 12, 0);
    p.drawLine(0, 0, 0, 12);
    p.end();

    p.begin(&aBackground);
    p.drawPixmap(2, 2, aInternal);
    p.setPen(options->colorGroup(Options::ButtonBg, true).mid());
    p.drawRect(0, 0, 14, 14);
    
    p.end();
}

kwin'SystemButton::setBitmap() (./kdebase/kwin/clients/system/systemclient.cpp:140)

void SystemButton::setBitmap(const unsigned char *bitmap)
{
    deco = QBitmap(8, 8, bitmap, true);
    deco.setMask(deco);
    repaint();
}

kwin'SystemButton::drawButton() (./kdebase/kwin/clients/system/systemclient.cpp:147)

void SystemButton::drawButton(QPainter *p)
{
    if(isDown())
        p->drawPixmap(0, 0, aBackground);
    else
        p->drawPixmap(0, 0, iBackground);

    p->setPen(options->color(Options::ButtonFg, isDown()));
    p->drawPixmap(isDown() ? 4 : 3, isDown() ? 4 : 3, deco);
}