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author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-11-08 12:31:36 -0600 |
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committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-11-08 12:31:36 -0600 |
commit | d796c9dd933ab96ec83b9a634feedd5d32e1ba3f (patch) | |
tree | 6e3dcca4f77e20ec8966c666aac7c35bd4704053 /doc/datastreamformat.doc | |
download | tqt3-d796c9dd933ab96ec83b9a634feedd5d32e1ba3f.tar.gz tqt3-d796c9dd933ab96ec83b9a634feedd5d32e1ba3f.zip |
Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731
Diffstat (limited to 'doc/datastreamformat.doc')
-rw-r--r-- | doc/datastreamformat.doc | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/doc/datastreamformat.doc b/doc/datastreamformat.doc new file mode 100644 index 000000000..e2c062fd5 --- /dev/null +++ b/doc/datastreamformat.doc @@ -0,0 +1,248 @@ +/**************************************************************************** +** +** Documentation of the Format of the QDataStream operators +** +** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the Qt GUI Toolkit. +** +** This file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free +** Software Foundation and appearing in the files LICENSE.GPL2 +** and LICENSE.GPL3 included in the packaging of this file. +** Alternatively you may (at your option) use any later version +** of the GNU General Public License if such license has been +** publicly approved by Trolltech ASA (or its successors, if any) +** and the KDE Free Qt Foundation. +** +** Please review the following information to ensure GNU General +** Public Licensing retquirements will be met: +** http://trolltech.com/products/qt/licenses/licensing/opensource/. +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://trolltech.com/products/qt/licenses/licensing/licensingoverview +** or contact the sales department at sales@trolltech.com. +** +** This file may be used under the terms of the Q Public License as +** defined by Trolltech ASA and appearing in the file LICENSE.QPL +** included in the packaging of this file. Licensees holding valid Qt +** Commercial licenses may use this file in accordance with the Qt +** Commercial License Agreement provided with the Software. +** +** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, +** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted +** herein. +** +**********************************************************************/ + +/*! +\page datastreamformat.html + +\title Format of the QDataStream Operators + +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. + +It is best to always cast integers to a Qt integer type when writing, +and to read back into the same Qt integer type when reading. + +\table +\row \i Q_INT8 + \i \list + \i signed byte + \endlist +\row \i Q_INT16 + \i \list + \i signed 16 bit integer + \endlist +\row \i Q_INT32 + \i \list + \i signed 32 bit integer + \endlist +\row \i Q_UINT8 + \i \list + \i unsigned byte + \endlist +\row \i Q_UINT16 + \i \list + \i unsigned 16 bit integer + \endlist +\row \i Q_UINT32 + \i \list + \i unsigned 32 bit integer + \endlist +\row \i float + \i \list + \i 32-bit floating point number using the standard IEEE-754 format + \endlist +\row \i double + \i \list + \i 64-bit floating point number using the standard IEEE-754 format + \endlist +\row \i char * + \i \list + \i The size of the string including the terminating 0 (Q_UINT32) + \i The string bytes including the terminating 0 + \endlist + The null string is represented as \c {(Q_UINT32) 0}. +\row \i QBitArray + \i \list + \i The array size (Q_UINT32) + \i The array bits, i.e. (size + 7)/8 bytes + \endlist +\row \i QBrush + \i \list + \i The brush style (Q_UINT8) + \i The brush color (QColor) + \i If style is CustomPattern, the brush pixmap (QPixmap) + \endlist +\row \i QByteArray + \i \list + \i The array size (Q_UINT32) + \i The array bytes, i.e. size bytes + \endlist +\row \i QCString + \i \list + \i The size of the string including the terminating 0 (Q_UINT32) + \i The string bytes including the terminating 0 + \endlist + The null string is represented as \c {(Q_UINT32) 0}. +\row \i \l QColor + \i \list \i RGB value serialized as a Q_UINT32 \endlist +\row \i QColorGroup + \i \list + \i foreground (QBrush) + \i button (QBrush) + \i light (QBrush) + \i midLight (QBrush) + \i dark (QBrush) + \i mid (QBrush) + \i text (QBrush) + \i brightText (QBrush) + \i ButtonText (QBrush) + \i base (QBrush) + \i background (QBrush) + \i shadow (QBrush) + \i highlight (QBrush) + \i highlightedText (QBrush) + \endlist +\row \i QCursor + \i \list + \i Shape id (Q_INT16) + \i If shape is BitmapCursor: The bitmap (QPixmap), mask (QPixmap) and hot spot (QPoint) + \endlist +\row \i QDate + \i \list + \i Julian day (Q_UINT32) + \endlist +\row \i QDateTime + \i \list + \i Date (QDate) + \i Time (QTime) + \endlist +\row \i QFont + \i \list + \i The family (QCString) + \i The point size (Q_INT16) + \i The style hint (Q_UINT8) + \i The char set (Q_UINT8) + \i The weight (Q_UINT8) + \i The font bits (Q_UINT8) + \endlist +\row \i QImage + \i \list + \i 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 \i QMap + \i \list + \i The number of items (Q_UINT32) + \i For all items, the key and value + \endlist +\row \i QPalette + \i \list + \i active (QColorGroup) + \i disabled (QColorGroup) + \i inactive (QColorGroup) + \endlist +\row \i QPen + \i \list + \i The pen styles (Q_UINT8) + \i The pen width (Q_UINT8) + \i The pen color (QColor) + \endlist +\row \i QPicture + \i \list + \i The size of the picture data (Q_UINT32) + \i The raw bytes of picture data (char) + \endlist +\row \i QPixmap + \i \list + \i Save it as a PNG image. + \endlist +\row \i QPoint + \i \list + \i The x coordinate (Q_INT32) + \i The y coordinate (Q_INT32) + \endlist +\row \i QPointArray + \i \list + \i The array size (Q_UINT32) + \i The array points (QPoint) + \endlist +\row \i QRect + \i \list + \i left (Q_INT32) + \i top (Q_INT32) + \i right (Q_INT32) + \i bottom (Q_INT32) + \endlist +\row \i QRegion + \i \list + \i The size of the data, i.e. 8 + 16 * (number of rectangles) (Q_UINT32) + \i QRGN_RECTS (Q_INT32) + \i The number of rectangles (Q_UINT32) + \i The rectangles in sequential order (QRect) + \endlist +\row \i QSize + \i \list + \i width (Q_INT32) + \i height (Q_INT32) + \endlist +\row \i QString + \i \list + \i If the string is null: 0xffffffff (Q_UINT32)<br> + otherwise: The string length (Q_UINT32) followed by the + data in UTF-16 + \endlist +\row \i QTime + \i \list + \i Milliseconds since midnight (Q_UINT32) + \endlist +\row \i QValueList + \i \list + \i The number of list elements (Q_UINT32) + \i All the elements in sequential order + \endlist +\row \i QVariant + \i \list + \i The type of the data (Q_UINT32) + \i The data of the specified type + \endlist +\row \i QWMatrix + \i \list + \i m11 (double) + \i m12 (double) + \i m21 (double) + \i m22 (double) + \i dx (double) + \i dy (double) + \endlist +\endtable + +*/ |