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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
#ifndef QSTYLE_P_H
#define QSTYLE_P_H
#include "private/qobject_p.h"
#include <QtWidgets/qstyle.h>
QT_BEGIN_NAMESPACE
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of qstyle_*.cpp. This header file may change from version to version
// without notice, or even be removed.
//
// We mean it.
//
// Private class
class QStyle;
class QStylePrivate: public QObjectPrivate
{
Q_DECLARE_PUBLIC(QStyle)
public:
static QStylePrivate *get(QStyle *s) { return s ? s->d_func() : nullptr; }
static const QStylePrivate *get(const QStyle *s) { return s ? s->d_func() : nullptr; }
static bool useFullScreenForPopup();
QStyle *proxyStyle;
QString name;
};
inline QPixmap styleCachePixmap(const QSize &size, qreal pixelRatio)
{
QPixmap cachePixmap = QPixmap(size * pixelRatio);
cachePixmap.setDevicePixelRatio(pixelRatio);
cachePixmap.fill(Qt::transparent);
return cachePixmap;
}
// small helper to read out the pixmap to paint from QPixmapCache or re-draw
// it and put it into the QPixmapCache for later usage
class Q_WIDGETS_EXPORT QCachedPainter
{
public:
QCachedPainter(QPainter *painter, const QString &cachePrefix,
const QStyleOption *option, QSize size = {}, QRect paintRect = {});
~QCachedPainter();
void finish();
bool needsPainting() const
{
return !m_alreadyCached;
}
QRect pixmapRect() const
{
const auto sz = m_pixmap.deviceIndependentSize();
return QRect(0, 0, sz.width(), sz.height());
}
QPainter *operator->()
{
return painter();
}
QPainter *painter()
{
Q_ASSERT_X(m_pixmapPainter, "painter()", "Must only be called when painting on a pixmap to cache");
return m_pixmapPainter.get();
}
// clean pixmap cache from all cached pixmaps (e.g. due to palette change)
// to make sure the widgets are painted correctly afterwards
static void cleanupPixmapCache();
private:
QPainter *m_painter = nullptr;
const QStyleOption *m_option = nullptr;
std::unique_ptr<QPainter> m_pixmapPainter;
QString m_pixmapName;
QPixmap m_pixmap;
QRect m_paintRect;
bool m_alreadyCached;
bool m_pixmapDrawn = false;
static QSet<QString> s_pixmapCacheKeys;
};
QT_END_NAMESPACE
#endif //QSTYLE_P_H
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