qproxystyle.cpp

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#include <qstyle.h>
#include <private/qproxystyle_p.h>
#include <private/qapplication_p.h>
#include "qproxystyle.h"
#include "qstylefactory.h"
#include <private/qstyle_p.h>

#if !defined(QT_NO_STYLE_PROXY) || defined(QT_PLUGIN)

QT_BEGIN_NAMESPACE

void QProxyStylePrivate::ensureBaseStyle() const
{
    Q_Q(const QProxyStyle);

    if (baseStyle)
        return;

    if (!baseStyle && !QApplicationPrivate::styleOverride.isEmpty()) {
        baseStyle = QStyleFactory::create(QApplicationPrivate::styleOverride);
        if (baseStyle) {
            // If baseStyle is an instance of the same proxyStyle
            // we destroy it and fall back to the desktop style
            if (qstrcmp(baseStyle->metaObject()->className(),
                        q->metaObject()->className()) == 0) {
                delete baseStyle;
                baseStyle = 0;
            }
        }
    }

    if (!baseStyle) // Use application desktop style
        baseStyle = QStyleFactory::create(QApplicationPrivate::desktopStyleKey());

    if (!baseStyle) // Fallback to windows style
        baseStyle = QStyleFactory::create(QLatin1String("windows"));

    baseStyle->setProxy(const_cast<QProxyStyle*>(q));
    baseStyle->setParent(const_cast<QProxyStyle*>(q)); // Take ownership
}

QProxyStyle::QProxyStyle(QStyle *style) :
    QCommonStyle(*new QProxyStylePrivate())
{
    Q_D(QProxyStyle);
    if (style) {
        style->setProxy(this);
        style->setParent(this); // Take ownership
        d->baseStyle = style;
    }
}

QProxyStyle::~QProxyStyle()
{
}

QStyle *QProxyStyle::baseStyle() const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle;
}

void QProxyStyle::setBaseStyle(QStyle *style)
{
    Q_D (QProxyStyle);

    if (d->baseStyle && d->baseStyle->parent() == this)
        d->baseStyle->deleteLater();

    d->baseStyle = style;

    if (d->baseStyle) {
        d->baseStyle->setProxy(this);
        d->baseStyle->setParent(this);
    }
}

void QProxyStyle::drawPrimitive(PrimitiveElement element, const QStyleOption *option, QPainter *painter, const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    d->baseStyle->drawPrimitive(element, option, painter, widget);
}

void QProxyStyle::drawControl(ControlElement element, const QStyleOption *option, QPainter *painter, const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    d->baseStyle->drawControl(element, option, painter, widget);
}

void QProxyStyle::drawComplexControl(ComplexControl control, const QStyleOptionComplex *option, QPainter *painter, const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    d->baseStyle->drawComplexControl(control, option, painter, widget);
}

void QProxyStyle::drawItemText(QPainter *painter, const QRect &rect, int flags, const QPalette &pal, bool enabled,
                               const QString &text, QPalette::ColorRole textRole) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    d->baseStyle->drawItemText(painter, rect, flags, pal, enabled, text, textRole);
}

void QProxyStyle::drawItemPixmap(QPainter *painter, const QRect &rect, int alignment, const QPixmap &pixmap) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    d->baseStyle->drawItemPixmap(painter, rect, alignment, pixmap);
}

QSize QProxyStyle::sizeFromContents(ContentsType type, const QStyleOption *option, const QSize &size, const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->sizeFromContents(type, option, size, widget);
}

QRect QProxyStyle::subElementRect(SubElement element, const QStyleOption *option, const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->subElementRect(element, option, widget);
}

QRect QProxyStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *option, SubControl sc, const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->subControlRect(cc, option, sc, widget);
}

QRect QProxyStyle::itemTextRect(const QFontMetrics &fm, const QRect &r, int flags, bool enabled, const QString &text) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->itemTextRect(fm, r, flags, enabled, text);
}

QRect QProxyStyle::itemPixmapRect(const QRect &r, int flags, const QPixmap &pixmap) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->itemPixmapRect(r, flags, pixmap);
}

QStyle::SubControl QProxyStyle::hitTestComplexControl(ComplexControl control, const QStyleOptionComplex *option, const QPoint &pos, const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->hitTestComplexControl(control, option, pos, widget);
}

int QProxyStyle::styleHint(StyleHint hint, const QStyleOption *option, const QWidget *widget, QStyleHintReturn *returnData) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->styleHint(hint, option, widget, returnData);
}

int QProxyStyle::pixelMetric(PixelMetric metric, const QStyleOption *option, const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->pixelMetric(metric, option, widget);
}

QPixmap QProxyStyle::standardPixmap(StandardPixmap standardPixmap, const QStyleOption *opt, const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->standardPixmap(standardPixmap, opt, widget);
}

QPixmap QProxyStyle::generatedIconPixmap(QIcon::Mode iconMode, const QPixmap &pixmap, const QStyleOption *opt) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->generatedIconPixmap(iconMode, pixmap, opt);
}

QPalette QProxyStyle::standardPalette() const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->standardPalette();
}

void QProxyStyle::polish(QWidget *widget)
{
    Q_D (QProxyStyle);
    d->ensureBaseStyle();
    d->baseStyle->polish(widget);
}

void QProxyStyle::polish(QPalette &pal)
{
    Q_D (QProxyStyle);
    d->ensureBaseStyle();
    d->baseStyle->polish(pal);
}

void QProxyStyle::polish(QApplication *app)
{
    Q_D (QProxyStyle);
    d->ensureBaseStyle();
    d->baseStyle->polish(app);
}

void QProxyStyle::unpolish(QWidget *widget)
{
    Q_D (QProxyStyle);
    d->ensureBaseStyle();
    d->baseStyle->unpolish(widget);
}

void QProxyStyle::unpolish(QApplication *app)
{
    Q_D (QProxyStyle);
    d->ensureBaseStyle();
    d->baseStyle->unpolish(app);
}

bool QProxyStyle::event(QEvent *e)
{
    Q_D (QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->event(e);
}

QIcon QProxyStyle::standardIconImplementation(StandardPixmap standardIcon,
                                              const QStyleOption *option,
                                              const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->standardIcon(standardIcon, option, widget);
}

int QProxyStyle::layoutSpacingImplementation(QSizePolicy::ControlType control1,
                                             QSizePolicy::ControlType control2,
                                             Qt::Orientation orientation,
                                             const QStyleOption *option,
                                             const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->layoutSpacing(control1, control2, orientation, option, widget);
}

QT_END_NAMESPACE

#endif // QT_NO_STYLE_PROXY