qproxystyle.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#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
 
using namespace Qt::StringLiterals;
 
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 = nullptr;
            }
        }
    }
 
    if (!baseStyle) // Use application desktop style
        baseStyle = QStyleFactory::create(QApplicationPrivate::desktopStyleKey());
 
    if (!baseStyle) // Fallback to windows style
        baseStyle = QStyleFactory::create("windows"_L1);
 
    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) {
        d->baseStyle = style;
        style->setProxy(this);
        style->setParent(this); // Take ownership
    }
}
 
QProxyStyle::QProxyStyle(const QString &key)
    : QProxyStyle(QStyleFactory::create(key))
{
}
 
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);
 
    switch (e->type()) {
    // The Mac style relies on these events in order to set the focus frame
    case QEvent::FocusIn:
    case QEvent::FocusOut:
        d->ensureBaseStyle();
        return QApplication::sendEvent(d->baseStyle, e);
    default:
        break;
    }
 
    return QCommonStyle::event(e);
}
 
QIcon QProxyStyle::standardIcon(StandardPixmap standardIcon,
                                const QStyleOption *option,
                                const QWidget *widget) const
{
    Q_D (const QProxyStyle);
    d->ensureBaseStyle();
    return d->baseStyle->standardIcon(standardIcon, option, widget);
}
 
int QProxyStyle::layoutSpacing(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
 
#include "moc_qproxystyle.cpp"
 
#endif // QT_NO_STYLE_PROXY