Windows-4.7.4/src/declarative/util/qdeclarativeapplication.cpp

/****************************************************************************
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtDeclarative module of the Qt Toolkit.
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#include "qdeclarativeapplication_p.h"
#include <private/qobject_p.h>
#include <QtGui/QApplication>

QT_BEGIN_NAMESPACE

class QDeclarativeApplicationPrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QDeclarativeApplication)
public:
    QDeclarativeApplicationPrivate() : active(QApplication::activeWindow() != 0),
    layoutDirection(QApplication::layoutDirection()) {}
    bool active;
    Qt::LayoutDirection layoutDirection;
};

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

QDeclarativeApplication::QDeclarativeApplication(QObject *parent) : QObject(*new QDeclarativeApplicationPrivate(), parent)
{
    if (qApp)
        qApp->installEventFilter(this);
}

QDeclarativeApplication::~QDeclarativeApplication()
{
}

bool QDeclarativeApplication::active() const
{
    Q_D(const QDeclarativeApplication);
    return d->active;
}

Qt::LayoutDirection QDeclarativeApplication::layoutDirection() const
{
    Q_D(const QDeclarativeApplication);
    return d->layoutDirection;
}

bool QDeclarativeApplication::eventFilter(QObject *obj, QEvent *event)
{
    Q_UNUSED(obj)
    Q_D(QDeclarativeApplication);
    if (event->type() == QEvent::ApplicationActivate
     || event->type() == QEvent::ApplicationDeactivate) {
        bool active = d->active;
        if (event->type() == QEvent::ApplicationActivate)
            active  = true;
        else if (event->type() == QEvent::ApplicationDeactivate)
            active  = false;

        if (d->active != active) {
            d->active = active;
            emit activeChanged();
        }
    }
    if (event->type() == QEvent::LayoutDirectionChange) {
        Qt::LayoutDirection direction = QApplication::layoutDirection();
        if (d->layoutDirection != direction) {
            d->layoutDirection = direction;
            emit layoutDirectionChanged();
        }
    }
    return false;
}

QT_END_NAMESPACE