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246 lines
8.0 KiB
246 lines
8.0 KiB
13 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/datastreamformat.doc:36 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Format of the TQDataStream Operators</title>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<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 TQDataStream Operators</h1>
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<p> The <a href="qdatastream.html">TQDataStream</a> allows you to serialize some of the TQt data types.
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The table below lists the data types that <a href="qdatastream.html">TQDataStream</a> can serialize
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and how they are represented.
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<p> It is best to always cast integers to a TQt integer type when writing,
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and to read back into the same TQt integer type when reading.
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<p> <center><table cellpadding="4" cellspacing="2" border="0">
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<tr bgcolor="#f0f0f0"> <td valign="top">Q_INT8
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<td valign="top"><ul>
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<li> signed byte
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">Q_INT16
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<td valign="top"><ul>
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<li> signed 16 bit integer
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">Q_INT32
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<td valign="top"><ul>
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<li> signed 32 bit integer
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">Q_UINT8
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<td valign="top"><ul>
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<li> unsigned byte
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">Q_UINT16
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<td valign="top"><ul>
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<li> unsigned 16 bit integer
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">Q_UINT32
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<td valign="top"><ul>
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<li> unsigned 32 bit integer
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">float
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<td valign="top"><ul>
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<li> 32-bit floating point number using the standard IEEE-754 format
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">double
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<td valign="top"><ul>
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<li> 64-bit floating point number using the standard IEEE-754 format
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">char *
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<td valign="top"><ul>
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<li> The size of the string including the terminating 0 (Q_UINT32)
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<li> The string bytes including the terminating 0
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</ul>
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The null string is represented as <tt>(Q_UINT32) 0</tt>.
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<tr bgcolor="#d0d0d0"> <td valign="top">TQBitArray
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<td valign="top"><ul>
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<li> The array size (Q_UINT32)
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<li> The array bits, i.e. (size + 7)/8 bytes
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQBrush
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<td valign="top"><ul>
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<li> The brush style (Q_UINT8)
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<li> The brush color (<a href="qcolor.html">TQColor</a>)
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<li> If style is CustomPattern, the brush pixmap (<a href="qpixmap.html">TQPixmap</a>)
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQByteArray
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<td valign="top"><ul>
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<li> The array size (Q_UINT32)
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<li> The array bytes, i.e. size bytes
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQCString
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<td valign="top"><ul>
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<li> The size of the string including the terminating 0 (Q_UINT32)
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<li> The string bytes including the terminating 0
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</ul>
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The null string is represented as <tt>(Q_UINT32) 0</tt>.
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<tr bgcolor="#d0d0d0"> <td valign="top"><a href="qcolor.html">TQColor</a>
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<td valign="top"><ul><li> RGB value serialized as a Q_UINT32 </ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQColorGroup
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<td valign="top"><ul>
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<li> foreground (<a href="qbrush.html">TQBrush</a>)
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<li> button (TQBrush)
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<li> light (TQBrush)
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<li> midLight (TQBrush)
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<li> dark (TQBrush)
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<li> mid (TQBrush)
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<li> text (TQBrush)
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<li> brightText (TQBrush)
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<li> ButtonText (TQBrush)
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<li> base (TQBrush)
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<li> background (TQBrush)
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<li> shadow (TQBrush)
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<li> highlight (TQBrush)
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<li> highlightedText (TQBrush)
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQCursor
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<td valign="top"><ul>
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<li> Shape id (Q_INT16)
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<li> If shape is BitmapCursor: The bitmap (<a href="qpixmap.html">TQPixmap</a>), mask (TQPixmap) and hot spot (<a href="qpoint.html">TQPoint</a>)
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQDate
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<td valign="top"><ul>
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<li> Julian day (Q_UINT32)
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQDateTime
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<td valign="top"><ul>
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<li> Date (<a href="qdate.html">TQDate</a>)
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<li> Time (<a href="qtime.html">TQTime</a>)
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQFont
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<td valign="top"><ul>
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<li> The family (<a href="qcstring.html">TQCString</a>)
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<li> The point size (Q_INT16)
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<li> The style hint (Q_UINT8)
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<li> The char set (Q_UINT8)
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<li> The weight (Q_UINT8)
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<li> The font bits (Q_UINT8)
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQImage
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<td valign="top"><ul>
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<li> If the image is null a "null image" marker is saved;
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otherwise the image is saved in PNG or BMP format (depending
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on the stream version). If you want control of the format,
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stream the image into a <a href="qbuffer.html">TQBuffer</a> (using <a href="qimageio.html">TQImageIO</a>) and stream
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that.
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQMap
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<td valign="top"><ul>
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<li> The number of items (Q_UINT32)
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<li> For all items, the key and value
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQPalette
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<td valign="top"><ul>
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<li> active (<a href="qcolorgroup.html">TQColorGroup</a>)
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<li> disabled (TQColorGroup)
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<li> inactive (TQColorGroup)
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQPen
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<td valign="top"><ul>
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<li> The pen styles (Q_UINT8)
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<li> The pen width (Q_UINT8)
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<li> The pen color (<a href="qcolor.html">TQColor</a>)
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQPicture
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<td valign="top"><ul>
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<li> The size of the picture data (Q_UINT32)
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<li> The raw bytes of picture data (char)
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQPixmap
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<td valign="top"><ul>
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<li> Save it as a PNG image.
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQPoint
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<td valign="top"><ul>
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<li> The x coordinate (Q_INT32)
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<li> The y coordinate (Q_INT32)
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQPointArray
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<td valign="top"><ul>
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<li> The array size (Q_UINT32)
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<li> The array points (<a href="qpoint.html">TQPoint</a>)
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQRect
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<td valign="top"><ul>
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<li> left (Q_INT32)
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<li> top (Q_INT32)
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<li> right (Q_INT32)
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<li> bottom (Q_INT32)
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQRegion
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<td valign="top"><ul>
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<li> The size of the data, i.e. 8 + 16 * (number of rectangles) (Q_UINT32)
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<li> TQRGN_RECTS (Q_INT32)
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<li> The number of rectangles (Q_UINT32)
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<li> The rectangles in sequential order (<a href="qrect.html">TQRect</a>)
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQSize
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<td valign="top"><ul>
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<li> width (Q_INT32)
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<li> height (Q_INT32)
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQString
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<td valign="top"><ul>
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<li> If the string is null: 0xffffffff (Q_UINT32)<br>
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otherwise: The string length (Q_UINT32) followed by the
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data in UTF-16
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQTime
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<td valign="top"><ul>
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<li> Milliseconds since midnight (Q_UINT32)
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQValueList
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<td valign="top"><ul>
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<li> The number of list elements (Q_UINT32)
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<li> All the elements in sequential order
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</ul>
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<tr bgcolor="#d0d0d0"> <td valign="top">TQVariant
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<td valign="top"><ul>
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<li> The type of the data (Q_UINT32)
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<li> The data of the specified type
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</ul>
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<tr bgcolor="#f0f0f0"> <td valign="top">TQWMatrix
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<td valign="top"><ul>
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<li> m11 (double)
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<li> m12 (double)
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<li> m21 (double)
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<li> m22 (double)
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<li> dx (double)
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<li> dy (double)
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</ul>
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</table></center>
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<p>
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<!-- eof -->
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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</table></div></address></body>
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</html>
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