<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/reggie/tmp/qt-3.1-reggie-23625/qt-x11-free-3.1.1/doc/datastreamformat.doc:36 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Format of the QDataStream Operators</title> <style type="text/css"><!-- h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; } a:link { color: #004faf; text-decoration: none } a:visited { color: #672967; text-decoration: none } body { background: #ffffff; color: black; } --></style> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr bgcolor="#E5E5E5"> <td valign=center> <a href="index.html"> <font color="#004faf">Home</font></a> | <a href="classes.html"> <font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"> <font color="#004faf">Main Classes</font></a> | <a href="annotated.html"> <font color="#004faf">Annotated</font></a> | <a href="groups.html"> <font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"> <font color="#004faf">Functions</font></a> </td> <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Format of the QDataStream Operators</h1> <p> The <a href="qdatastream.html">QDataStream</a> allows you to serialize some of the Qt data types. The table below lists the data types that <a href="qdatastream.html">QDataStream</a> can serialize and how they are represented. <p> <center><table cellpadding="4" cellspacing="2" border="0"> <tr bgcolor="#f0f0f0"> <td valign="top">Q_INT8 <td valign="top"><ul> <li> signed byte </ul> <tr bgcolor="#d0d0d0"> <td valign="top">Q_INT16 <td valign="top"><ul> <li> signed 16 bit integer </ul> <tr bgcolor="#f0f0f0"> <td valign="top">Q_INT32 <td valign="top"><ul> <li> signed 32 bit integer </ul> <tr bgcolor="#d0d0d0"> <td valign="top">Q_UINT8 <td valign="top"><ul> <li> unsigned byte </ul> <tr bgcolor="#f0f0f0"> <td valign="top">Q_UINT16 <td valign="top"><ul> <li> unsigned 16 bit integer </ul> <tr bgcolor="#d0d0d0"> <td valign="top">Q_UINT32 <td valign="top"><ul> <li> unsigned 32 bit integer </ul> <tr bgcolor="#f0f0f0"> <td valign="top">float <td valign="top"><ul> <li> 32-bit floating point number using the standard IEEE-754 format </ul> <tr bgcolor="#d0d0d0"> <td valign="top">double <td valign="top"><ul> <li> 64-bit floating point number using the standard IEEE-754 format </ul> <tr bgcolor="#f0f0f0"> <td valign="top">char * <td valign="top"><ul> <li> The size of the string including the terminating 0 (Q_UINT32) <li> The string bytes including the terminating 0 </ul> The null string is represented as <tt>(Q_UINT32) 0</tt>. <tr bgcolor="#d0d0d0"> <td valign="top">QBitArray <td valign="top"><ul> <li> The array size (Q_UINT32) <li> The array bits, i.e. (size + 7)/8 bytes </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QBrush <td valign="top"><ul> <li> The brush style (Q_UINT8) <li> The brush color (<a href="qcolor.html">QColor</a>) <li> If style is CustomPattern, the brush pixmap (<a href="qpixmap.html">QPixmap</a>) </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QByteArray <td valign="top"><ul> <li> The array size (Q_UINT32) <li> The array bytes, i.e. size bytes </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QCString <td valign="top"><ul> <li> The size of the string including the terminating 0 (Q_UINT32) <li> The string bytes including the terminating 0 </ul> The null string is represented as <tt>(Q_UINT32) 0</tt>. <tr bgcolor="#d0d0d0"> <td valign="top"><a href="qcolor.html">QColor</a> <td valign="top"><ul><li> RGB value serialized as a Q_UINT32 </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QColorGroup <td valign="top"><ul> <li> foreground (<a href="qbrush.html">QBrush</a>) <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) </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QCursor <td valign="top"><ul> <li> Shape id (Q_INT16) <li> If shape is BitmapCursor: The bitmap (<a href="qpixmap.html">QPixmap</a>), mask (QPixmap) and hot spot (<a href="qpoint.html">QPoint</a>) </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QDate <td valign="top"><ul> <li> Julian day (Q_UINT32) </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QDateTime <td valign="top"><ul> <li> Date (<a href="qdate.html">QDate</a>) <li> Time (<a href="qtime.html">QTime</a>) </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QFont <td valign="top"><ul> <li> The family (<a href="qcstring.html">QCString</a>) <li> The point size (Q_INT16) <li> The style hint (Q_UINT8) <li> The char set (Q_UINT8) <li> The weight (Q_UINT8) <li> The font bits (Q_UINT8) </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QImage <td valign="top"><ul> <li> Save it as a PNG image. </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QMap <td valign="top"><ul> <li> The number of items (Q_UINT32) <li> For all items, the key and value </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QPalette <td valign="top"><ul> <li> active (<a href="qcolorgroup.html">QColorGroup</a>) <li> disabled (QColorGroup) <li> inactive (QColorGroup) </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QPen <td valign="top"><ul> <li> The pen styles (Q_UINT8) <li> The pen width (Q_UINT8) <li> The pen color (<a href="qcolor.html">QColor</a>) </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QPicture <td valign="top"><ul> <li> The size of the picture data (Q_UINT32) <li> The raw bytes of picture data (char) </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QPixmap <td valign="top"><ul> <li> Save it as a PNG image. </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QPoint <td valign="top"><ul> <li> The x coordinate (Q_INT32) <li> The y coordinate (Q_INT32) </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QPointArray <td valign="top"><ul> <li> The array size (Q_UINT32) <li> The array points (<a href="qpoint.html">QPoint</a>) </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QRect <td valign="top"><ul> <li> left (Q_INT32) <li> top (Q_INT32) <li> right (Q_INT32) <li> bottom (Q_INT32) </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QRegion <td valign="top"><ul> <li> The size of the data, i.e. 8 + 16 * (number of rectangles) (Q_UINT32) <li> QRGN_RECTS (Q_INT32) <li> The number of rectangles (Q_UINT32) <li> The rectangles in sequential order (<a href="qrect.html">QRect</a>) </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QSize <td valign="top"><ul> <li> width (Q_INT32) <li> height (Q_INT32) </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QString <td valign="top"><ul> <li> If the string is null: 0xffffffff (Q_UINT32)<br> otherwise: The string length (Q_UINT32) followed by the data in UTF-16 </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QTime <td valign="top"><ul> <li> Milliseconds since midnight (Q_UINT32) </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QValueList <td valign="top"><ul> <li> The number of list elements (Q_UINT32) <li> All the elements in sequential order </ul> <tr bgcolor="#d0d0d0"> <td valign="top">QVariant <td valign="top"><ul> <li> The type of the data (Q_UINT32) <li> The data of the specified type </ul> <tr bgcolor="#f0f0f0"> <td valign="top">QWMatrix <td valign="top"><ul> <li> m11 (double) <li> m12 (double) <li> m21 (double) <li> m22 (double) <li> dx (double) <li> dy (double) </ul> </table></center> <p> <!-- eof --> <p><address><hr><div align=center> <table width=100% cellspacing=0 border=0><tr> <td>Copyright © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a> <td align=right><div align=right>Qt version 3.1.1</div> </table></div></address></body> </html>