qregion.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

            s >> a;
            rgn = QRegion(a, id == QRGN_SETPTARRAY_WIND ? Qt::WindingFill : Qt::OddEvenFill);
        } else if (id == QRGN_TRANSLATE) {
            QPoint p;
            s >> p;
            rgn.translate(p.x(), p.y());
        } else if (id >= QRGN_OR && id <= QRGN_XOR) {
            QByteArray bop1, bop2;
            QRegion r1, r2;
            s >> bop1;
            r1.exec(bop1);
            s >> bop2;
            r2.exec(bop2);

            switch (id) {
                case QRGN_OR:
                    rgn = r1.unite(r2);
                    break;
                case QRGN_AND:
                    rgn = r1.intersect(r2);
                    break;
                case QRGN_SUB:
                    rgn = r1.subtract(r2);
                    break;
                case QRGN_XOR:
                    rgn = r1.eor(r2);
                    break;
            }
        } else if (id == QRGN_RECTS) {
            // (This is the only form used in Qt 2.0)
            quint32 n;
            s >> n;
            QRect r;
            for (int i=0; i<(int)n; i++) {
                s >> r;
                rgn = rgn.unite(QRegion(r));
            }
        }
    }
    *this = rgn;
}


/*****************************************************************************
  QRegion stream functions
 *****************************************************************************/

/*!
    \relates QRegion

    Writes the region \a r to the stream \a s and returns a reference
    to the stream.

    \sa \link datastreamformat.html Format of the QDataStream operators \endlink
*/

QDataStream &operator<<(QDataStream &s, const QRegion &r)
{
    QVector<QRect> a = r.rects();
    if (a.isEmpty()) {
        s << (quint32)0;
    } else {
        if (s.version() == 1) {
            int i;
            for (i = a.size() - 1; i > 0; --i) {
                s << (quint32)(12 + i * 24);
                s << (int)QRGN_OR;
            }
            for (i = 0; i < a.size(); ++i) {
                s << (quint32)(4+8) << (int)QRGN_SETRECT << a[i];
            }
        } else {
            s << (quint32)(4 + 4 + 16 * a.size()); // 16: storage size of QRect
            s << (qint32)QRGN_RECTS;
            s << a;
        }
    }
    return s;
}

/*!
    \relates QRegion

    Reads a region from the stream \a s into \a r and returns a
    reference to the stream.

    \sa \link datastreamformat.html Format of the QDataStream operators \endlink
*/

QDataStream &operator>>(QDataStream &s, QRegion &r)
{
    QByteArray b;
    s >> b;
    r.exec(b, s.version());
    return s;
}
#endif //QT_NO_DATASTREAM

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug s, const QRegion &r)
{
    QVector<QRect> rects = r.rects();
    s.nospace() << "QRegion(size=" << rects.size() << "), "
                << "bounds = " << r.boundingRect() << "\n";
    for (int i=0; i<rects.size(); ++i)
        s << "- " << i << rects.at(i) << "\n";
    return s;
}
#endif


// These are not inline - they can be implemented better on some platforms
//  (eg. Windows at least provides 3-variable operations).  For now, simple.


/*!
    Applies the unite() function to this region and \a r. \c r1|r2 is
    equivalent to \c r1.unite(r2)

    \sa unite(), operator+()
*/
const QRegion QRegion::operator|(const QRegion &r) const
    { return unite(r); }

/*!
    Applies the unite() function to this region and \a r. \c r1+r2 is
    equivalent to \c r1.unite(r2)

    \sa unite(), operator|()
*/
const QRegion QRegion::operator+(const QRegion &r) const
    { return unite(r); }

/*!
    Applies the intersect() function to this region and \a r. \c r1&r2
    is equivalent to \c r1.intersect(r2)

    \sa intersect()
*/
const QRegion QRegion::operator&(const QRegion &r) const
    { return intersect(r); }

/*!
    Applies the subtract() function to this region and \a r. \c r1-r2
    is equivalent to \c r1.subtract(r2)

    \sa subtract()
*/
const QRegion QRegion::operator-(const QRegion &r) const
    { return subtract(r); }

/*!
    Applies the eor() function to this region and \a r. \c r1^r2 is
    equivalent to \c r1.eor(r2)

    \sa eor()
*/
const QRegion QRegion::operator^(const QRegion &r) const
    { return eor(r); }

/*!
    Applies the unite() function to this region and \a r and assigns
    the result to this region. \c r1|=r2 is equivalent to \c
    r1=r1.unite(r2).

    \sa unite()
*/
QRegion& QRegion::operator|=(const QRegion &r)
    { return *this = *this | r; }

/*!
    Applies the unite() function to this region and \a r and assigns
    the result to this region. \c r1+=r2 is equivalent to \c
    r1=r1.unite(r2).

    \sa intersect()
*/
QRegion& QRegion::operator+=(const QRegion &r)
    { return *this = *this + r; }

/*!
    Applies the intersect() function to this region and \a r and
    assigns the result to this region. \c r1&=r2 is equivalent to \c
    r1=r1.intersect(r2).

    \sa intersect()
*/
QRegion& QRegion::operator&=(const QRegion &r)
    { return *this = *this & r; }

/*!
    Applies the subtract() function to this region and \a r and
    assigns the result to this region. \c r1-=r2 is equivalent to \c
    r1=r1.subtract(r2).

    \sa subtract()
*/
QRegion& QRegion::operator-=(const QRegion &r)
    { return *this = *this - r; }

/*!
    Applies the eor() function to this region and \a r and
    assigns the result to this region. \c r1^=r2 is equivalent to \c
    r1=r1.eor(r2).

    \sa eor()
*/
QRegion& QRegion::operator^=(const QRegion &r)
    { return *this = *this ^ r; }

/*!
    \fn bool QRegion::operator!=(const QRegion &other) const

    Returns true if this region is different from the \a other region;
    otherwise returns false.
*/

/*!
   Returns the region as a QVariant
*/
QRegion::operator QVariant() const
{
    return QVariant(QVariant::Region, this);
}

/*!
    \fn bool QRegion::isNull() const

    Use isEmpty() instead.
*/


/*!
    \fn QRegion QRegion::translated(const QPoint &p) const
    \overload
    \since 4.1

    Returns a copy of the regtion that is translated \a{p}\e{.x()}
    along the x axis and \a{p}\e{.y()} along the y axis, relative to
    the current position.  Positive values move the rectangle to the
    right and down.

    \sa translate()
*/

/*!
    \since 4.1

    Returns a copy of the region that is translated \a dx along the
    x axis and \a dy along the y axis, relative to the current
    position. Positive values move the region to the right and
    down.

    \sa translate()
*/

QRegion
QRegion::translated(int dx, int dy) const
{
    QRegion ret(*this);
    ret.translate(dx, dy);
    return ret;
}