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<title>A qt-interest mail archive search</title>
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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>A qt-interest mail archive search</h1>
<p>
<p> This example does a search on the qt-interest mailinglist archives. It uses
<a href="qhttp.html">QHttp</a> to issue the search command and to fetch the results. The GUI parts
were done using <a href="designer-manual.html">Qt Designer</a>.
<p> <hr>
<p> The implementation of the HTTP requests (archivedialog.ui.h):
<p> <pre>/****************************************************************************
** $Id: qt/archivedialog.ui.h 3.3.8 edited Jan 29 15:54 $
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
/****************************************************************************
** ui.h extension file, included from the uic-generated form implementation.
**
** If you wish to add, delete or rename functions or slots use
** Qt Designer which will update this file, preserving your code. Create an
** init() function in place of a constructor, and a destroy() function in
** place of a destructor.
*****************************************************************************/
void ArchiveDialog::init()
{
connect(&articleSearcher, SIGNAL(done(bool)), this, SLOT(searchDone(bool)));
connect(&articleFetcher, SIGNAL(done(bool)), this, SLOT(fetchDone(bool)));
connect(myListView, SIGNAL(selectionChanged(QListViewItem*)), this, SLOT(fetch(QListViewItem*)));
connect(myLineEdit, SIGNAL(returnPressed()), this, SLOT(search()));
connect(myListView, SIGNAL(returnPressed(QListViewItem*)), this, SLOT(fetch(QListViewItem*)));
connect(myPushButton, SIGNAL(clicked()), this, SLOT(close()));
}
void ArchiveDialog::fetch( <a href="qlistviewitem.html">QListViewItem</a> *it )
{
<a name="x477"></a> <a href="qurl.html">QUrl</a> u(it-><a href="qlistviewitem.html#text">text</a>(1));
<a name="x485"></a> articleFetcher.setHost(u.<a href="qurl.html#host">host</a>());
articleFetcher.get(it-><a href="qlistviewitem.html#text">text</a>(1));
}
void ArchiveDialog::fetchDone( bool error )
{
if (error) {
<a name="x478"></a> QMessageBox::<a href="qmessagebox.html#critical">critical</a>(this, "Error fetching",
"An error occurred when fetching this document: "
+ articleFetcher.errorString(),
QMessageBox::Ok, QMessageBox::NoButton);
} else {
myTextBrowser->setText(articleFetcher.readAll());
}
}
void ArchiveDialog::search()
{
if (articleSearcher.state() == QHttp::HostLookup
|| articleSearcher.state() == QHttp::Connecting
|| articleSearcher.state() == QHttp::Sending
|| articleSearcher.state() == QHttp::Reading) {
articleSearcher.abort();
}
if (myLineEdit->text() == "") {
QMessageBox::<a href="qmessagebox.html#critical">critical</a>(this, "Empty query",
"Please type a search string.",
QMessageBox::Ok, QMessageBox::NoButton);
} else {
<a name="x474"></a> QApplication::<a href="qapplication.html#setOverrideCursor">setOverrideCursor</a>(QCursor(Qt::WaitCursor));
articleSearcher.setHost("lists.trolltech.com");
<a href="qhttprequestheader.html">QHttpRequestHeader</a> header("POST", "/qt-interest/search.php");
<a name="x476"></a> header.<a href="qhttpheader.html#setValue">setValue</a>("Host", "lists.trolltech.com");
<a name="x475"></a> header.<a href="qhttpheader.html#setContentType">setContentType</a>("application/x-www-form-urlencoded");
<a href="qstring.html">QString</a> encodedTopic = myLineEdit->text();
<a name="x484"></a> QUrl::<a href="qurl.html#encode">encode</a>(encodedTopic);
<a href="qstring.html">QString</a> searchString = "qt-interest=on&search=" + encodedTopic;
<a name="x483"></a> articleSearcher.request(header, searchString.<a href="qstring.html#utf8">utf8</a>());
}
}
void ArchiveDialog::searchDone( bool error )
{
if (error) {
QMessageBox::<a href="qmessagebox.html#critical">critical</a>(this, "Error searching",
"An error occurred when searching: "
+ articleSearcher.errorString(),
QMessageBox::Ok, QMessageBox::NoButton);
} else {
<a href="qstring.html">QString</a> result(articleSearcher.readAll());
<a href="qregexp.html">QRegExp</a> rx("<a href=\"(http://lists\\.trolltech\\.com/qt-interest/.*)\">(.*)</a>");
<a name="x482"></a> rx.<a href="qregexp.html#setMinimal">setMinimal</a>(TRUE);
int pos = 0;
while (pos >= 0) {
<a name="x481"></a> pos = rx.<a href="qregexp.html#search">search</a>(result, pos);
if (pos > -1) {
<a name="x480"></a> pos += rx.<a href="qregexp.html#matchedLength">matchedLength</a>();
<a name="x479"></a> new <a href="qlistviewitem.html">QListViewItem</a>(myListView, rx.<a href="qregexp.html#cap">cap</a>(2), rx.<a href="qregexp.html#cap">cap</a>(1));
}
}
}
<a name="x473"></a> QApplication::<a href="qapplication.html#restoreOverrideCursor">restoreOverrideCursor</a>();
}
</pre>
<p> <hr>
<p> Main (main.cpp):
<p> <pre>/****************************************************************************
** $Id: qt/main.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 Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include "archivedialog.h"
#include <<a href="qapplication-h.html">qapplication.h</a>>
int main(int argc, char **argv)
{
<a href="qapplication.html">QApplication</a> a( argc, argv );
ArchiveDialog ad;
ad.show();
<a name="x489"></a><a name="x487"></a> QObject::<a href="qobject.html#connect">connect</a>( &a, SIGNAL(<a href="qapplication.html#lastWindowClosed">lastWindowClosed</a>()),
<a name="x488"></a> &a, SLOT(<a href="qapplication.html#quit">quit</a>()) );
<a name="x486"></a> return a.<a href="qapplication.html#exec">exec</a>();
}
</pre>
<p>See also <a href="network-examples.html">Network Examples</a>.
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