qguivariant.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qvariant.h"

#include "qbitmap.h"
#include "qbrush.h"
#include "qcolor.h"
#include "qcursor.h"
#include "qdatastream.h"
#include "qdebug.h"
#include "qfont.h"
#include "qicon.h"
#include "qimage.h"
#include "qkeysequence.h"
#include "qpalette.h"
#include "qpen.h"
#include "qpixmap.h"
#include "qpolygon.h"
#include "qregion.h"
#include "qsizepolicy.h"
#include "qtextformat.h"

#include "private/qvariant_p.h"

#ifdef QT3_SUPPORT
extern QDataStream &qt_stream_out_qcolorgroup(QDataStream &s, const QColorGroup &g);
extern QDataStream &qt_stream_in_qcolorgroup(QDataStream &s, QColorGroup &g);
#endif

Q_CORE_EXPORT const QVariant::Handler *qcoreVariantHandler();

static void construct(QVariant::Private *x, const void *copy)
{
    switch (x->type) {
    case QVariant::Bitmap:
        v_construct<QBitmap>(x, copy);
        break;
    case QVariant::Region:
        v_construct<QRegion>(x, copy);
        break;
    case QVariant::Polygon:
        v_construct<QPolygon>(x, copy);
        break;
    case QVariant::Font:
        v_construct<QFont>(x, copy);
        break;
    case QVariant::Pixmap:
        v_construct<QPixmap>(x, copy);
        break;
    case QVariant::Image:
        v_construct<QImage>(x, copy);
        break;
    case QVariant::Brush:
        v_construct<QBrush>(x, copy);
        break;
    case QVariant::Color:
        v_construct<QColor>(x, copy);
        break;
    case QVariant::Palette:
        v_construct<QPalette>(x, copy);
        break;
#ifdef QT3_SUPPORT
    case QVariant::ColorGroup:
        v_construct<QColorGroup>(x, copy);
        break;
#endif
#ifndef QT_NO_ICON
    case QVariant::Icon:
        v_construct<QIcon>(x, copy);
        break;
#endif
    case QVariant::TextFormat:
        v_construct<QTextFormat>(x, copy);
        break;
    case QVariant::TextLength:
        v_construct<QTextLength>(x, copy);
        break;
#ifndef QT_NO_SHORTCUT
    case QVariant::KeySequence:
        v_construct<QKeySequence>(x, copy);
        break;
#endif
    case QVariant::Pen:
        v_construct<QPen>(x, copy);
        break;
    case QVariant::SizePolicy:
        v_construct<QSizePolicy>(x, copy);
        break;
#ifndef QT_NO_CURSOR
    case QVariant::Cursor:
        v_construct<QCursor>(x, copy);
        break;
#endif
    default:
        qcoreVariantHandler()->construct(x, copy);
        return;
    }
    x->is_null = !copy;
}

static void clear(QVariant::Private *d)
{
    switch (d->type) {
    case QVariant::Bitmap:
        v_clear<QBitmap>(d);
        break;
    case QVariant::Cursor:
        v_clear<QCursor>(d);
        break;
    case QVariant::Region:
        v_clear<QRegion>(d);
        break;
    case QVariant::Polygon:
        v_clear<QPolygon>(d);
        break;
    case QVariant::Font:
        v_clear<QFont>(d);
        break;
    case QVariant::Pixmap:
        v_clear<QPixmap>(d);
        break;
    case QVariant::Image:
        v_clear<QImage>(d);
        break;
    case QVariant::Brush:
        v_clear<QBrush>(d);
        break;
    case QVariant::Color:
        v_clear<QColor>(d);
        break;
    case QVariant::Palette:
        v_clear<QPalette>(d);
        break;
#ifdef QT3_SUPPORT
    case QVariant::ColorGroup:
        v_clear<QColorGroup>(d);
        break;
#endif
#ifndef QT_NO_ICON
    case QVariant::Icon:
        v_clear<QIcon>(d);
        break;
#endif
    case QVariant::TextFormat:
        v_clear<QTextFormat>(d);
        break;
    case QVariant::TextLength:
        v_clear<QTextLength>(d);
        break;
    case QVariant::SizePolicy:
        v_clear<QSizePolicy>(d);
        break;
#ifndef QT_NO_SHORTCUT
    case QVariant::KeySequence:
        v_clear<QKeySequence>(d);
        break;
#endif
    case QVariant::Pen:
        v_clear<QPen>(d);
        break;
    default:
        qcoreVariantHandler()->clear(d);
        return;
    }

    d->type = QVariant::Invalid;
    d->is_null = true;
    d->is_shared = false;
}


static bool isNull(const QVariant::Private *d)
{
    switch(d->type) {
    case QVariant::Bitmap:
        return v_cast<QBitmap>(d)->isNull();
    case QVariant::Region:
        return v_cast<QRegion>(d)->isEmpty();
    case QVariant::Polygon:
        return v_cast<QPolygon>(d)->isEmpty();
    case QVariant::Pixmap:
        return v_cast<QPixmap>(d)->isNull();
    case QVariant::Image:
        return v_cast<QImage>(d)->isNull();
#ifndef QT_NO_ICON
    case QVariant::Icon:
        return v_cast<QIcon>(d)->isNull();
#endif
    case QVariant::TextFormat:
    case QVariant::TextLength:
    case QVariant::Cursor:
    case QVariant::StringList:
    case QVariant::Font:
    case QVariant::Brush:
    case QVariant::Color:
    case QVariant::Palette:
#ifdef QT3_SUPPORT
    case QVariant::ColorGroup:
#endif
    case QVariant::SizePolicy:
#ifndef QT_NO_SHORTCUT
    case QVariant::KeySequence:
#endif
    case QVariant::Pen:
        break;
    default:
        return qcoreVariantHandler()->isNull(d);
    }
    return d->is_null;
}

#ifndef QT_NO_DATASTREAM
static void load(QVariant::Private *d, QDataStream &s)
{
    switch (d->type) {
#ifndef QT_NO_CURSOR
    case QVariant::Cursor:
        s >> *v_cast<QCursor>(d);
        break;
#endif
    case QVariant::Bitmap: 
        s >> *v_cast<QBitmap>(d);
        break;
    case QVariant::Region:
        s >> *v_cast<QRegion>(d);
        break;
    case QVariant::Polygon:
        s >> *v_cast<QPolygon>(d);
        break;
    case QVariant::Font:
        s >> *v_cast<QFont>(d);
        break;
    case QVariant::Pixmap:
        s >> *v_cast<QPixmap>(d);
        break;
    case QVariant::Image:
        s >> *v_cast<QImage>(d);
        break;
    case QVariant::Brush:
        s >> *v_cast<QBrush>(d);
        break;
    case QVariant::Color:
        s >> *v_cast<QColor>(d);
        break;
    case QVariant::Palette:
        s >> *v_cast<QPalette>(d);
        break;
#ifdef QT3_SUPPORT
    case QVariant::ColorGroup:
        qt_stream_in_qcolorgroup(s, *v_cast<QColorGroup>(d));
        break;
#endif
#ifndef QT_NO_ICON
    case QVariant::Icon: {
        QPixmap x;
        s >> x;
        *v_cast<QIcon>(d) = QIcon(x);
        break;
    }
#endif
    case QVariant::TextFormat: {
        QTextFormat x;
        s >> x;
        *v_cast<QTextFormat>(d) = x;
        break;
    }
    case QVariant::TextLength: {
        QTextLength x;
        s >> x;
        *v_cast<QTextLength>(d) = x;
        break;
    }
    case QVariant::SizePolicy: {
        int h, v;
        qint8 hfw;
        s >> h >> v >> hfw;
        QSizePolicy *sp = v_cast<QSizePolicy>(d);
        *sp = QSizePolicy(QSizePolicy::Policy(h), QSizePolicy::Policy(v));
        sp->setHeightForWidth(bool(hfw));
        break;
    }
#ifndef QT_NO_SHORTCUT
    case QVariant::KeySequence:
        s >> *v_cast<QKeySequence>(d);
        break;
#endif // QT_NO_SHORTCUT
    case QVariant::Pen:
        s >> *v_cast<QPen>(d);
        break;
    default:
        qcoreVariantHandler()->load(d, s);
        return;
    }
}


static void save(const QVariant::Private *d, QDataStream &s)
{
    switch (d->type) {
#ifndef QT_NO_CURSOR
    case QVariant::Cursor:
        s << *v_cast<QCursor>(d);
        break;
#endif
    case QVariant::Bitmap:
        s << *v_cast<QBitmap>(d);
        break;
    case QVariant::Polygon:
        s << *v_cast<QPolygon>(d);
        break;
    case QVariant::Region:
        s << *v_cast<QRegion>(d);
        break;