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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtQml/qqml.h>
#include <QtQuickControls2/private/qquickstyleplugin_p.h>
#include <QtGui/qguiapplication.h>
#include <QtQuickTemplates2/private/qquicktheme_p.h>
#include "qquicknativestyle.h"
#include "qquickcommonstyle.h"
#if defined(Q_OS_MACOS)
#include "qquickmacstyle_mac_p.h"
#elif defined(Q_OS_WINDOWS)
# include "qquickwindowsxpstyle_p.h"
#endif
QT_BEGIN_NAMESPACE
using namespace QQC2;
class QtQuickControls2NativeStylePlugin : public QQuickStylePlugin
{
Q_OBJECT
Q_PLUGIN_METADATA(IID QQmlExtensionInterface_iid)
public:
~QtQuickControls2NativeStylePlugin() override;
void initializeEngine(QQmlEngine *engine, const char *uri) override;
void registerTypes(const char *uri) override;
QString name() const override;
};
static void deleteQStyle()
{
// When we delete QStyle, it will free up it's own internal resources. Especially
// on macOS, this means releasing a lot of NSViews and NSCells from the QMacStyle
// destructor. If we did this from ~QtQuickControls2NativeStylePlugin, it would
// happen when the plugin was unloaded from a Q_DESTRUCTOR_FUNCTION in QLibrary,
// which is very late in the tear-down process, and after qGuiApp has been set to
// nullptr, NSApplication has stopped running, and perhaps also other static platform
// variables (e.g in AppKit?) has been deleted. And to our best guess, this is also why
// we see a crash in AppKit from the destructor in QMacStyle. So for this reason, we
// delete QStyle from a post routine rather than from the destructor.
QQuickNativeStyle::setStyle(nullptr);
}
QtQuickControls2NativeStylePlugin::~QtQuickControls2NativeStylePlugin()
{
if (!qGuiApp)
return;
// QGuiApplication is still running, so we need to remove the post
// routine to not be called after we have been unloaded.
qRemovePostRoutine(deleteQStyle);
QQuickNativeStyle::setStyle(nullptr);
}
QString QtQuickControls2NativeStylePlugin::name() const
{
return QStringLiteral("NativeStyle");
}
void QtQuickControls2NativeStylePlugin::initializeEngine(QQmlEngine *engine, const char *uri)
{
Q_UNUSED(engine);
Q_UNUSED(uri);
// Enable commonstyle as a reference style while
// the native styles are under development.
QStyle *style = nullptr;
if (qEnvironmentVariable("QQC2_COMMONSTYLE") == QStringLiteral("true")) {
style = new QCommonStyle;
} else {
const QString envStyle = qEnvironmentVariable("QQC2_STYLE");
if (!envStyle.isNull()) {
if (envStyle == QLatin1String("common"))
style = new QCommonStyle;
#if defined(Q_OS_MACOS)
else if (envStyle == QLatin1String("mac"))
style = new QMacStyle;
#endif
#if defined(Q_OS_WINDOWS)
else if (envStyle == QLatin1String("windows"))
style = new QWindowsStyle;
else if (envStyle == QLatin1String("windowsxp"))
style = new QWindowsXPStyle;
#endif
}
if (!style) {
#if defined(Q_OS_MACOS)
style = new QMacStyle;
#elif defined(Q_OS_WINDOWS)
style = new QWindowsXPStyle;
#else
style = new QCommonStyle;
#endif
}
}
qAddPostRoutine(deleteQStyle);
QQuickNativeStyle::setStyle(style);
}
void QtQuickControls2NativeStylePlugin::registerTypes(const char *uri)
{
Q_UNUSED(uri);
if (!QQuickTheme::instance())
return;
QQuickTheme::instance()->setPalette(QQuickTheme::System, QPalette());
QQuickTheme::instance()->setFont(QQuickTheme::System, QFont());
}
QT_END_NAMESPACE
#include "qtquickcontrols2nativestyleplugin.moc"
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