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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/process/process.doc:5 -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>Starting processes with IO redirection</title>
+<style type="text/css"><!--
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+<tr bgcolor="#E5E5E5">
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+ <a href="index.html">
+<font color="#004faf">Home</font></a>
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+<font color="#004faf">All&nbsp;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>Starting processes with IO redirection</h1>
+
+
+<p>
+<p> This example shows you how to start other processes with TQt and how
+IO redirection is done. The example tries to start the uic (a tool
+that comes with the TQt Designer) on a certain ui file and displays the
+output of the command.
+<p> <hr>
+<p> Implementation (process.cpp):
+<p> <pre>/****************************************************************************
+** $Id: qt/process.cpp 3.3.8 edited Jan 11 14:37 $
+**
+** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
+**
+** This file is part of an example program for TQt. This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include &lt;<a href="qobject-h.html">qobject.h</a>&gt;
+#include &lt;<a href="qprocess-h.html">qprocess.h</a>&gt;
+#include &lt;<a href="qvbox-h.html">qvbox.h</a>&gt;
+#include &lt;<a href="qtextview-h.html">qtextview.h</a>&gt;
+#include &lt;<a href="qpushbutton-h.html">qpushbutton.h</a>&gt;
+#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
+#include &lt;<a href="qmessagebox-h.html">qmessagebox.h</a>&gt;
+
+#include &lt;stdlib.h&gt;
+
+class UicManager : public <a href="qvbox.html">TQVBox</a>
+{
+ <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
+
+public:
+ UicManager();
+ ~UicManager() {}
+
+public slots:
+ void readFromStdout();
+ void scrollToTop();
+
+private:
+ <a href="qprocess.html">TQProcess</a> *proc;
+ <a href="qtextview.html">TQTextView</a> *output;
+ <a href="qpushbutton.html">TQPushButton</a> *tquitButton;
+};
+
+<a name="f204"></a>UicManager::UicManager()
+{
+ // Layout
+ output = new <a href="qtextview.html">TQTextView</a>( this );
+ tquitButton = new <a href="qpushbutton.html">TQPushButton</a>( <a href="qobject.html#tr">tr</a>("Quit"), this );
+ <a href="qobject.html#connect">connect</a>( tquitButton, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()),
+ qApp, SLOT(<a href="qapplication.html#tquit">tquit</a>()) );
+ <a href="qwidget.html#resize">resize</a>( 500, 500 );
+
+ // TQProcess related code
+ proc = new <a href="qprocess.html">TQProcess</a>( this );
+
+ // Set up the command and arguments.
+ // On the command line you would do:
+ // uic -tr <a href="i18n.html#i18n">i18n</a> "small_dialog.ui"
+<a name="x97"></a> proc-&gt;<a href="qprocess.html#addArgument">addArgument</a>( "uic" );
+ proc-&gt;<a href="qprocess.html#addArgument">addArgument</a>( "-tr" );
+ proc-&gt;<a href="qprocess.html#addArgument">addArgument</a>( "i18n" );
+ proc-&gt;<a href="qprocess.html#addArgument">addArgument</a>( "small_dialog.ui" );
+
+<a name="x100"></a> <a href="qobject.html#connect">connect</a>( proc, SIGNAL(<a href="qprocess.html#readyReadStdout">readyReadStdout</a>()),
+ this, SLOT(readFromStdout()) );
+<a name="x98"></a> <a href="qobject.html#connect">connect</a>( proc, SIGNAL(<a href="qprocess.html#processExited">processExited</a>()),
+ this, SLOT(scrollToTop()) );
+
+<a name="x101"></a> if ( !proc-&gt;<a href="qprocess.html#start">start</a>() ) {
+ // error handling
+<a name="x96"></a> TQMessageBox::<a href="qmessagebox.html#critical">critical</a>( 0,
+ <a href="qobject.html#tr">tr</a>("Fatal error"),
+ <a href="qobject.html#tr">tr</a>("Could not start the uic command."),
+ <a href="qobject.html#tr">tr</a>("Quit") );
+ exit( -1 );
+ }
+}
+
+void <a name="f205"></a>UicManager::readFromStdout()
+{
+ // Read and process the data.
+ // Bear in mind that the data might be output in chunks.
+<a name="x99"></a><a name="x103"></a> output-&gt;<a href="qtextedit.html#append">append</a>( proc-&gt;<a href="qprocess.html#readStdout">readStdout</a>() );
+}
+
+void <a name="f206"></a>UicManager::scrollToTop()
+{
+<a name="x102"></a> output-&gt;<a href="qscrollview.html#setContentsPos">setContentsPos</a>( 0, 0 );
+}
+
+int main( int argc, char **argv )
+{
+ <a href="qapplication.html">TQApplication</a> a( argc, argv );
+ UicManager manager;
+ a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &amp;manager );
+ manager.<a href="qwidget.html#show">show</a>();
+ return a.<a href="qapplication.html#exec">exec</a>();
+}
+
+#include "process.moc"
+</pre>
+
+<p>See also <a href="qprocess-examples.html">TQProcess Examples</a>.
+
+<!-- eof -->
+<p><address><hr><div align=center>
+<table width=100% cellspacing=0 border=0><tr>
+<td>Copyright &copy; 2007
+<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
+<td align=right><div align=right>TQt 3.3.8</div>
+</table></div></address></body>
+</html>