1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta name="robots" content="noindex,noarchive">
<title>Qt Toolkit - QDataPump Class</title><style type="text/css"><!--
h3.fn,span.fn { margin-left: 15%; text-indent: -15%; }
a:link { text-decoration: none; }
--></style>
</head><body bgcolor="#ffffff">
<a href=index.html><img width=122 height=65 src=qtlogo.jpg alt="Qt logo" align=left border=0></a>
<center><img src=dochead.gif width=472 height=27></center>
<br clear=all>
<h1 align=center>QDataPump Class Reference</h1><br clear="all">
<p>
Moves data from a <a href="qdatasource.html">QDataSource</a> to a <a href="qdatasink.html">QDataSink</a> during event processing.
<a href="#details">More...</a>
<p>
<code>#include <<a href="qasyncio-h.html">qasyncio.h</a>></code>
<p>
Inherits <a href="qobject.html">QObject</a>.
<p><a href="qdatapump-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li><span class="fn"><a href="qdatapump.html#a0"><strong>QDataPump</strong></a>(QDataSource*, QDataSink*)</span>
</ul>
<hr><h2><a name="details"></a>Detailed Description</h2>
Moves data from a <a href="qdatasource.html">QDataSource</a> to a <a href="qdatasink.html">QDataSink</a> during event processing.
<p>
For a QDataSource to provide data to a QDataSink, a controller must exist
to examine the <a href="qdatasource.html#a0">QDataSource::readyToSend</a>() and <a href="qdatasink.html#a0">QDataSink::readyToReceive</a>()
methods and respond to the QASyncIO::activate() signal of the source and
sink. One very useful way to do this is interleaved with other event
processing. QDataPump provides this - create a pipe between a source
and a sink, and data will be moved during subsequent event processing.
<p>Note that each source can only provide data to one sink and each sink
can only receive data from one source (although it is quite possible
to write a multiplexing sink that is multiple sources).
<hr><h2>Member Function Documentation</h2>
<h3 class="fn"><a name="a0"></a>QDataPump::QDataPump(<a href="qdatasource.html">QDataSource</a>*data_source, <a href="qdatasink.html">QDataSink</a>*data_sink)</h3>
<p>Creates a QDataPump to move data from a given <em>data_source</em>
to a given <em>data_sink.</em>
<hr><p>
Search the documentation, FAQ, qt-interest archive and more (uses
<a href="http://www.troll.no">www.troll.no</a>):<br>
<form method=post action="http://www.troll.no/search.cgi">
<input type=hidden name="version" value="1.44"><nobr>
<input size="50" name="search"><input type=submit value="Search">
</nobr></form><hr><p>
This file is part of the <a href="index.html">Qt toolkit</a>,
copyright © 1995-99
<a href="troll.html">Troll Tech</a>, all rights reserved.
<p>
It was generated from the following files:
<ul>
<li>qasyncio.h: 1998/08/19
<li>qasyncio.cpp: 1998/08/12
</ul>
<p><address><hr><div align="center">
<table width="100%" cellspacing="0" border="0"><tr>
<td>Copyright 1999 Troll Tech<td><a href="trademarks.html">Trademarks</a>
<td align="right"><div align="right">Qt version 1.45</div>
</table></div></address></body></html>
|
