qsize.cpp

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#include "qsize.h"
#include "qdatastream.h"
#include "qdebug.h"

QT_BEGIN_NAMESPACE

/*****************************************************************************
  QSize member functions
 *****************************************************************************/

void QSize::transpose()
{
    int tmp = wd;
    wd = ht;
    ht = tmp;
}

void QSize::scale(const QSize &s, Qt::AspectRatioMode mode)
{
    if (mode == Qt::IgnoreAspectRatio || wd == 0 || ht == 0) {
        wd = s.wd;
        ht = s.ht;
    } else {
        bool useHeight;
        qint64 rw = qint64(s.ht) * qint64(wd) / qint64(ht);

        if (mode == Qt::KeepAspectRatio) {
            useHeight = (rw <= s.wd);
        } else { // mode == Qt::KeepAspectRatioByExpanding
            useHeight = (rw >= s.wd);
        }

        if (useHeight) {
            wd = rw;
            ht = s.ht;
        } else {
            ht = qint32(qint64(s.wd) * qint64(ht) / qint64(wd));
            wd = s.wd;
        }
    }
}

/*****************************************************************************
  QSize stream functions
 *****************************************************************************/
#ifndef QT_NO_DATASTREAM

QDataStream &operator<<(QDataStream &s, const QSize &sz)
{
    if (s.version() == 1)
        s << (qint16)sz.width() << (qint16)sz.height();
    else
        s << (qint32)sz.width() << (qint32)sz.height();
    return s;
}

QDataStream &operator>>(QDataStream &s, QSize &sz)
{
    if (s.version() == 1) {
        qint16 w, h;
        s >> w;  sz.rwidth() = w;
        s >> h;  sz.rheight() = h;
    }
    else {
        qint32 w, h;
        s >> w;  sz.rwidth() = w;
        s >> h;  sz.rheight() = h;
    }
    return s;
}
#endif // QT_NO_DATASTREAM

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QSize &s) {
    dbg.nospace() << "QSize(" << s.width() << ", " << s.height() << ')';
    return dbg.space();
}
#endif



/*****************************************************************************
  QSizeF member functions
 *****************************************************************************/

void QSizeF::transpose()
{
    qreal tmp = wd;
    wd = ht;
    ht = tmp;
}

void QSizeF::scale(const QSizeF &s, Qt::AspectRatioMode mode)
{
    if (mode == Qt::IgnoreAspectRatio || qIsNull(wd) || qIsNull(ht)) {
        wd = s.wd;
        ht = s.ht;
    } else {
        bool useHeight;
        qreal rw = s.ht * wd / ht;

        if (mode == Qt::KeepAspectRatio) {
            useHeight = (rw <= s.wd);
        } else { // mode == Qt::KeepAspectRatioByExpanding
            useHeight = (rw >= s.wd);
        }

        if (useHeight) {
            wd = rw;
            ht = s.ht;
        } else {
            ht = s.wd * ht / wd;
            wd = s.wd;
        }
    }
}

/*****************************************************************************
  QSizeF stream functions
 *****************************************************************************/
#ifndef QT_NO_DATASTREAM

QDataStream &operator<<(QDataStream &s, const QSizeF &sz)
{
    s << double(sz.width()) << double(sz.height());
    return s;
}

QDataStream &operator>>(QDataStream &s, QSizeF &sz)
{
    double w, h;
    s >> w;
    s >> h;
    sz.setWidth(qreal(w));
    sz.setHeight(qreal(h));
    return s;
}
#endif // QT_NO_DATASTREAM

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QSizeF &s) {
    dbg.nospace() << "QSizeF(" << s.width() << ", " << s.height() << ')';
    return dbg.space();
}
#endif

QT_END_NAMESPACE