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Diffstat (limited to 'src/corelib/doc/src/datastreamformat.qdoc')
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diff --git a/src/corelib/doc/src/datastreamformat.qdoc b/src/corelib/doc/src/datastreamformat.qdoc new file mode 100644 index 0000000000..8ff31371a2 --- /dev/null +++ b/src/corelib/doc/src/datastreamformat.qdoc @@ -0,0 +1,373 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:FDL$ +** GNU Free Documentation License +** Alternatively, this file may be used under the terms of the GNU Free +** Documentation License version 1.3 as published by the Free Software +** Foundation and appearing in the file included in the packaging of +** this file. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms +** and conditions contained in a signed written agreement between you +** and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/*! + \page datastreamformat.html + \title Serializing Qt Data Types + \ingroup qt-network + \brief Representations of data types that can be serialized by QDataStream. + + The \l QDataStream allows you to serialize some of the Qt data types. + The table below lists the data types that QDataStream can serialize + and how they are represented. The format described below is + \l{QDataStream::setVersion()}{version 12}. + + It is always best to cast integers to a Qt integer type, such as + qint16 or quint32, when reading and writing. This ensures that + you always know exactly what size integers you are reading and + writing, no matter what the underlying platform and architecture + the application happens to be running on. + + \table + \row \li bool + \li \list + \li boolean + \endlist + \row \li qint8 + \li \list + \li signed byte + \endlist + \row \li qint16 + \li \list + \li signed 16-bit integer + \endlist + \row \li qint32 + \li \list + \li signed 32-bit integer + \endlist + \row \li qint64 + \li \list + \li signed 64-bit integer + \endlist + \row \li quint8 + \li \list + \li unsigned byte + \endlist + \row \li quint16 + \li \list + \li unsigned 16-bit integer + \endlist + \row \li quint32 + \li \list + \li unsigned 32-bit integer + \endlist + \row \li quint64 + \li \list + \li unsigned 64-bit integer + \endlist + \row \li \c float + \li \list + \li 32-bit floating point number using the standard IEEE 754 format + \endlist + \row \li \c double + \li \list + \li 64-bit floating point number using the standard IEEE 754 format + \endlist + \row \li \c {const char *} + \li \list + \li The string length (quint32) + \li The string bytes, excluding the terminating 0 + \endlist + \row \li QBitArray + \li \list + \li The array size (quint32) + \li The array bits, i.e. (size + 7)/8 bytes + \endlist + \row \li QBrush + \li \list + \li The brush style (quint8) + \li The brush color (QColor) + \li If style is CustomPattern, the brush pixmap (QPixmap) + \endlist + \row \li QByteArray + \li \list + \li If the byte array is null: 0xFFFFFFFF (quint32) + \li Otherwise: the array size (quint32) followed by the array bytes, i.e. size bytes + \endlist + \row \li \l QColor + \li \list + \li Color spec (qint8) + \li Alpha value (quint16) + \li Red value (quint16) + \li Green value (quint16) + \li Blue value (quint16) + \li Pad value (quint16) + \endlist + \row \li QCursor + \li \list + \li Shape ID (qint16) + \li If shape is BitmapCursor: The bitmap (QPixmap), mask (QPixmap), and hot spot (QPoint) + \endlist + \row \li QDate + \li \list + \li Julian day (quint32) + \endlist + \row \li QDateTime + \li \list + \li Date (QDate) + \li Time (QTime) + \li 0 for Qt::LocalTime, 1 for Qt::UTC (quint8) + \endlist + \row \li QEasingCurve + \li \list + \li type (quint8) + \li func (quint64) + \li hasConfig (bool) + \li If hasConfig is true then these fields follow: + \li list + \li period (double) + \li amplitude (double) + \li overshoot (double) + \endlist + \row \li QFont + \li \list + \li The family (QString) + \li The point size (qint16) + \li The style hint (quint8) + \li The char set (quint8) + \li The weight (quint8) + \li The font bits (quint8) + \endlist + \row \li QHash<Key, T> + \li \list + \li The number of items (quint32) + \li For all items, the key (Key) and value (T) + \endlist + \row \li QIcon + \li \list + \li The number of pixmap entries (quint32) + \li For all pixmap entries: + \list + \li The pixmap (QPixmap) + \li The file name (QString) + \li The pixmap size (QSize) + \li The \l{QIcon::Mode}{mode} (quint32) + \li The \l{QIcon::State}{state} (quint32) + \endlist + \endlist + \row \li QImage + \li \list + \li If the image is null a "null image" marker is saved; + otherwise the image is saved in PNG or BMP format (depending + on the stream version). If you want control of the format, + stream the image into a QBuffer (using QImageIO) and stream + that. + \endlist + \row \li QKeySequence + \li \list + \li A QList<int>, where each integer is a key in the key sequence + \endlist + \row \li QLinkedList<T> + \li \list + \li The number of items (quint32) + \li The items (T) + \endlist + \row \li QList<T> + \li \list + \li The number of items (quint32) + \li The items (T) + \endlist + \row \li QMap<Key, T> + \li \list + \li The number of items (quint32) + \li For all items, the key (Key) and value (T) + \endlist + \row \li QMargins + \li \list + \li left (int) + \li top (int) + \li right (int) + \li bottom (int) + \endlist + \row \li QMatrix + \li \list + \li m11 (double) + \li m12 (double) + \li m21 (double) + \li m22 (double) + \li dx (double) + \li dy (double) + \endlist + \row \li QMatrix4x4 + \li \list + \li m11 (double) + \li m12 (double) + \li m13 (double) + \li m14 (double) + \li m21 (double) + \li m22 (double) + \li m23 (double) + \li m24 (double) + \li m31 (double) + \li m32 (double) + \li m33 (double) + \li m34 (double) + \li m41 (double) + \li m42 (double) + \li m43 (double) + \li m44 (double) + \endlist + \row \li QPair<T1, T2> + \li \list + \li first (T1) + \li second (T2) + \endlist + \row \li QPalette + \li The disabled, active, and inactive color groups, each of which consists + of the following: + \list + \li foreground (QBrush) + \li button (QBrush) + \li light (QBrush) + \li midlight (QBrush) + \li dark (QBrush) + \li mid (QBrush) + \li text (QBrush) + \li brightText (QBrush) + \li buttonText (QBrush) + \li base (QBrush) + \li background (QBrush) + \li shadow (QBrush) + \li highlight (QBrush) + \li highlightedText (QBrush) + \li link (QBrush) + \li linkVisited (QBrush) + \endlist + \row \li QPen + \li \list + \li The pen styles (quint8) + \li The pen width (quint16) + \li The pen color (QColor) + \endlist + \row \li QPicture + \li \list + \li The size of the picture data (quint32) + \li The raw bytes of picture data (char) + \endlist + \row \li QPixmap + \li \list + \li Save it as a PNG image. + \endlist + \row \li QPoint + \li \list + \li The x coordinate (qint32) + \li The y coordinate (qint32) + \endlist + \row \li QQuaternion + \li \list + \li The scalar component (double) + \li The x coordinate (double) + \li The y coordinate (double) + \li The z coordinate (double) + \endlist + \row \li QRect + \li \list + \li left (qint32) + \li top (qint32) + \li right (qint32) + \li bottom (qint32) + \endlist + \row \li QRegExp + \li \list + \li The regexp pattern (QString) + \li Case sensitivity (quint8) + \li Regular expression syntax (quint8) + \li Minimal matching (quint8) + \endlist + \row \li QRegularExpression + \li \list + \li The regular expression pattern (QString) + \li The pattern options (quint32) + \endlist + \row \li QRegion + \li \list + \li The size of the data, i.e. 8 + 16 * (number of rectangles) (quint32) + \li 10 (qint32) + \li The number of rectangles (quint32) + \li The rectangles in sequential order (QRect) + \endlist + \row \li QSize + \li \list + \li width (qint32) + \li height (qint32) + \endlist + \row \li QString + \li \list + \li If the string is null: 0xFFFFFFFF (quint32) + \li Otherwise: The string length in bytes (quint32) followed by the data in UTF-16 + \endlist + \row \li QTime + \li \list + \li Milliseconds since midnight (quint32) + \endlist + \row \li QTransform + \li \list + \li m11 (double) + \li m12 (double) + \li m13 (double) + \li m21 (double) + \li m22 (double) + \li m23 (double) + \li m31 (double) + \li m32 (double) + \li m33 (double) + \endlist + \row \li QUrl + \li \list + \li Holds an URL (QString) + \endlist + \row \li QVariant + \li \list + \li The type of the data (quint32) + \li The null flag (qint8) + \li The data of the specified type + \endlist + \row \li QVector2D + \li \list + \li the x coordinate (double) + \li the y coordinate (double) + \endlist + \row \li QVector3D + \li \list + \li the x coordinate (double) + \li the y coordinate (double) + \li the z coordinate (double) + \endlist + \row \li QVector4D + \li \list + \li the x coordinate (double) + \li the y coordinate (double) + \li the z coordinate (double) + \li the w coordinate (double) + \endlist + \row \li QVector<T> + \li \list + \li The number of items (quint32) + \li The items (T) + \endlist + \endtable +*/ |