qt-everywhere-src-5.15.1/qtdeclarative/src/quick/util/qquickapplication.cpp

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** This file is part of the QtQuick module of the Qt Toolkit.
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#include "qquickapplication_p.h"
#include <private/qquickscreen_p.h>
#include <private/qobject_p.h>
#include <private/qguiapplication_p.h>
#include <qpa/qplatformintegration.h>
#include <QtGui/QGuiApplication>
#include <QtCore/QDebug>
#include <QtQml/private/qqmlglobal_p.h>

QT_BEGIN_NAMESPACE

/*
    This object and its properties are documented as part of the Qt object,
    in qqmlengine.cpp
*/

QQuickApplication::QQuickApplication(QObject *parent)
    : QQmlApplication(parent)
{
    if (qApp) {
        connect(qApp, SIGNAL(layoutDirectionChanged(Qt::LayoutDirection)),
                this, SIGNAL(layoutDirectionChanged()));
        connect(qApp, SIGNAL(applicationStateChanged(Qt::ApplicationState)),
                this, SIGNAL(stateChanged(Qt::ApplicationState)));
        connect(qApp, SIGNAL(applicationStateChanged(Qt::ApplicationState)),
                this, SIGNAL(activeChanged()));
        connect(qApp, SIGNAL(applicationDisplayNameChanged()),
                this, SIGNAL(displayNameChanged()));

        connect(qApp, &QGuiApplication::screenAdded, this, &QQuickApplication::updateScreens);
        connect(qApp, &QGuiApplication::screenRemoved, this, &QQuickApplication::updateScreens);
        updateScreens();
    }
}

QQuickApplication::~QQuickApplication()
{
}

bool QQuickApplication::active() const
{
    return QGuiApplication::applicationState() == Qt::ApplicationActive;
}

Qt::LayoutDirection QQuickApplication::layoutDirection() const
{
    return QGuiApplication::layoutDirection();
}

bool QQuickApplication::supportsMultipleWindows() const
{
    return QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::MultipleWindows);
}

Qt::ApplicationState QQuickApplication::state() const
{
    return QGuiApplication::applicationState();
}

QFont QQuickApplication::font() const
{
    return QGuiApplication::font();
}

QString QQuickApplication::displayName() const
{
    return QGuiApplication::applicationDisplayName();
}

void QQuickApplication::setDisplayName(const QString &displayName)
{
    return QGuiApplication::setApplicationDisplayName(displayName);
}

int screens_count(QQmlListProperty<QQuickScreenInfo> *prop)
{
    return static_cast<QVector<QQuickScreenInfo *> *>(prop->data)->count();
}

QQuickScreenInfo *screens_at(QQmlListProperty<QQuickScreenInfo> *prop, int idx)
{
    return static_cast<QVector<QQuickScreenInfo *> *>(prop->data)->at(idx);
}

QQmlListProperty<QQuickScreenInfo> QQuickApplication::screens()
{
    return QQmlListProperty<QQuickScreenInfo>(this,
        const_cast<QVector<QQuickScreenInfo *> *>(&m_screens), &screens_count, &screens_at);
}

void QQuickApplication::updateScreens()
{
    const QList<QScreen *> screenList = QGuiApplication::screens();
    m_screens.resize(screenList.count());
    for (int i = 0; i < screenList.count(); ++i) {
        if (!m_screens[i])
            m_screens[i] = new QQuickScreenInfo(this);
        m_screens[i]->setWrappedScreen(screenList[i]);
    }
    emit screensChanged();
}

QT_END_NAMESPACE

#include "moc_qquickapplication_p.cpp"