qcursor.cpp

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#include "qcursor.h"

#ifndef QT_NO_CURSOR

#include <qapplication.h>
#include <qbitmap.h>
#include <qimage.h>
#include <qdatastream.h>
#include <qvariant.h>
#include <private/qcursor_p.h>

QT_BEGIN_NAMESPACE

/*****************************************************************************
  QCursor stream functions
 *****************************************************************************/

#ifndef QT_NO_DATASTREAM


QDataStream &operator<<(QDataStream &s, const QCursor &c)
{
    s << (qint16)c.shape();                        // write shape id to stream
    if (c.shape() == Qt::BitmapCursor) {                // bitmap cursor
        bool isPixmap = false;
        if (s.version() >= 7) {
            isPixmap = !c.pixmap().isNull();
            s << isPixmap;
        }
        if (isPixmap)
            s << c.pixmap();
        else
            s << *c.bitmap() << *c.mask();
        s << c.hotSpot();
    }
    return s;
}

QDataStream &operator>>(QDataStream &s, QCursor &c)
{
    qint16 shape;
    s >> shape;                                        // read shape id from stream
    if (shape == Qt::BitmapCursor) {                // read bitmap cursor
        bool isPixmap = false;
        if (s.version() >= 7)
            s >> isPixmap;
        if (isPixmap) {
            QPixmap pm;
            QPoint hot;
            s >> pm >> hot;
            c = QCursor(pm, hot.x(), hot.y());
        } else {
            QBitmap bm, bmm;
            QPoint hot;
            s >> bm >> bmm >> hot;
            c = QCursor(bm, bmm, hot.x(), hot.y());
        }
    } else {
        c.setShape((Qt::CursorShape)shape);                // create cursor with shape
    }
    return s;
}
#endif // QT_NO_DATASTREAM


QCursor::QCursor(const QPixmap &pixmap, int hotX, int hotY)
    : d(0)
{
    QImage img = pixmap.toImage().convertToFormat(QImage::Format_Indexed8, Qt::ThresholdDither|Qt::AvoidDither);
    QBitmap bm = QBitmap::fromImage(img, Qt::ThresholdDither|Qt::AvoidDither);
    QBitmap bmm = pixmap.mask();
    if (!bmm.isNull()) {
        QBitmap nullBm;
        bm.setMask(nullBm);
    }
    else if (!pixmap.mask().isNull()) {
        QImage mimg = pixmap.mask().toImage().convertToFormat(QImage::Format_Indexed8, Qt::ThresholdDither|Qt::AvoidDither);
        bmm = QBitmap::fromImage(mimg, Qt::ThresholdDither|Qt::AvoidDither);
    }
    else {
        bmm = QBitmap(bm.size());
        bmm.fill(Qt::color1);
    }

    d = QCursorData::setBitmap(bm, bmm, hotX, hotY);
    d->pixmap = pixmap;
}



QCursor::QCursor(const QBitmap &bitmap, const QBitmap &mask, int hotX, int hotY)
    : d(0)
{
    d = QCursorData::setBitmap(bitmap, mask, hotX, hotY);
}

QCursorData *qt_cursorTable[Qt::LastCursor + 1];
bool QCursorData::initialized = false;

void QCursorData::cleanup()
{
    if(!QCursorData::initialized)
        return;

    for (int shape = 0; shape <= Qt::LastCursor; ++shape) {
        // In case someone has a static QCursor defined with this shape
        if (!qt_cursorTable[shape]->ref.deref())
            delete qt_cursorTable[shape];
        qt_cursorTable[shape] = 0;
    }
    QCursorData::initialized = false;
}

void QCursorData::initialize()
{
    if (QCursorData::initialized)
        return;
#ifdef Q_WS_MAC
    // DRSWAT - Not Needed Cocoa or Carbon
    //InitCursor();
#endif
    for (int shape = 0; shape <= Qt::LastCursor; ++shape)
        qt_cursorTable[shape] = new QCursorData((Qt::CursorShape)shape);
    QCursorData::initialized = true;
}

QCursor::QCursor()
{
    if (!QCursorData::initialized) {
        if (QApplication::startingUp()) {
            d = 0;
            return;
        }
        QCursorData::initialize();
    }
    QCursorData *c = qt_cursorTable[0];
    c->ref.ref();
    d = c;
}

QCursor::QCursor(Qt::CursorShape shape)
    : d(0)
{
    if (!QCursorData::initialized)
        QCursorData::initialize();
    setShape(shape);
}


Qt::CursorShape QCursor::shape() const
{
    if (!QCursorData::initialized)
        QCursorData::initialize();
    return d->cshape;
}

void QCursor::setShape(Qt::CursorShape shape)
{
    if (!QCursorData::initialized)
        QCursorData::initialize();
    QCursorData *c = uint(shape) <= Qt::LastCursor ? qt_cursorTable[shape] : 0;
    if (!c)
        c = qt_cursorTable[0];
    c->ref.ref();
    if (!d) {
        d = c;
    } else {
        if (!d->ref.deref())
            delete d;
        d = c;
    }
}

const QBitmap *QCursor::bitmap() const
{
    if (!QCursorData::initialized)
        QCursorData::initialize();
    return d->bm;
}

const QBitmap *QCursor::mask() const
{
    if (!QCursorData::initialized)
        QCursorData::initialize();
    return d->bmm;
}

QPixmap QCursor::pixmap() const
{
    if (!QCursorData::initialized)
        QCursorData::initialize();
    return d->pixmap;
}

QPoint QCursor::hotSpot() const
{
    if (!QCursorData::initialized)
        QCursorData::initialize();
    return QPoint(d->hx, d->hy);
}

QCursor::QCursor(const QCursor &c)
{
    if (!QCursorData::initialized)
        QCursorData::initialize();
    d = c.d;
    d->ref.ref();
}

QCursor::~QCursor()
{
    if (d && !d->ref.deref())
        delete d;
}


QCursor &QCursor::operator=(const QCursor &c)
{
    if (!QCursorData::initialized)
        QCursorData::initialize();
    if (c.d)
        c.d->ref.ref();
    if (d && !d->ref.deref())
        delete d;
    d = c.d;
    return *this;
}

QCursor::operator QVariant() const
{
    return QVariant(QVariant::Cursor, this);
}
QT_END_NAMESPACE
#endif // QT_NO_CURSOR