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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/xml/tagreader-with-features/tagreader.doc:5 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Demonstration of SAX2 features</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>Demonstration of SAX2 features</h1>
<p>
<p> This example presents a small <a href="xml.html#sax2">SAX2</a>
reader that outputs the qualified names and the
respective namespace URIs of all elements and attributes in an
XML file. Additionally the tree structure of the document is displayed.
<p> In three listviews the program shows the different output of the reader
depending on how the SAX2 <a href="xml.html#sax2Namespaces">features</a>
<em>http://xml.org/sax/features/namespaces</em> and
<em>http://xml.org/sax/features/namespace-prefixes</em> are set.
<p> This example is thoroughly explained in a
<a href="xml-sax-features-walkthrough.html">walkthrough.</a>
<p> <hr>
<p> Header file:
<p> <pre>/*
$Id: qt/structureparser.h 3.3.8 edited May 27 2003 $
*/
#ifndef STRUCTUREPARSER_H
#define STRUCTUREPARSER_H
#include <<a href="qxml-h.html">qxml.h</a>>
#include <<a href="qptrstack-h.html">qptrstack.h</a>>
class QListView;
class QListViewItem;
class QString;
class StructureParser: public <a href="qxmldefaulthandler.html">QXmlDefaultHandler</a>
{
public:
StructureParser( <a href="qlistview.html">QListView</a> * );
bool startElement( const <a href="qstring.html">QString</a>&, const <a href="qstring.html">QString</a>&, const <a href="qstring.html">QString</a>& ,
const <a href="qxmlattributes.html">QXmlAttributes</a>& );
bool endElement( const <a href="qstring.html">QString</a>&, const <a href="qstring.html">QString</a>&, const <a href="qstring.html">QString</a>& );
void setListView( <a href="qlistview.html">QListView</a> * );
private:
<a href="qptrstack.html">QPtrStack</a><QListViewItem> stack;
<a href="qlistview.html">QListView</a> * table;
};
#endif
</pre>
<p> <hr>
<p> Implementation:
<p> <pre>/*
$Id: qt/structureparser.cpp 3.3.8 edited May 27 2003 $
*/
#include "structureparser.h"
#include <<a href="qstring-h.html">qstring.h</a>>
#include <<a href="qlistview-h.html">qlistview.h</a>>
<a name="f528"></a>StructureParser::StructureParser( <a href="qlistview.html">QListView</a> * t )
: <a href="qxmldefaulthandler.html">QXmlDefaultHandler</a>()
{
setListView( t );
}
void <a name="f529"></a>StructureParser::setListView( <a href="qlistview.html">QListView</a> * t )
{
table = t;
table->setSorting( -1 );
table->addColumn( "Qualified name" );
table->addColumn( "Namespace" );
}
<a name="x1971"></a>bool StructureParser::<a href="qxmlcontenthandler.html#startElement">startElement</a>( const <a href="qstring.html">QString</a>& namespaceURI,
const <a href="qstring.html">QString</a>& ,
const <a href="qstring.html">QString</a>& qName,
const <a href="qxmlattributes.html">QXmlAttributes</a>& attributes)
{
<a href="qlistviewitem.html">QListViewItem</a> * element;
if ( ! stack.isEmpty() ){
<a href="qlistviewitem.html">QListViewItem</a> *lastChild = stack.top()->firstChild();
if ( lastChild ) {
<a name="x1965"></a> while ( lastChild-><a href="qlistviewitem.html#nextSibling">nextSibling</a>() )
lastChild = lastChild-><a href="qlistviewitem.html#nextSibling">nextSibling</a>();
}
element = new <a href="qlistviewitem.html">QListViewItem</a>( stack.top(), lastChild, qName, namespaceURI );
} else {
element = new <a href="qlistviewitem.html">QListViewItem</a>( table, qName, namespaceURI );
}
stack.push( element );
<a name="x1966"></a> element-><a href="qlistviewitem.html#setOpen">setOpen</a>( TRUE );
<a name="x1967"></a> if ( attributes.<a href="qxmlattributes.html#length">length</a>() > 0 ) {
for ( int i = 0 ; i < attributes.<a href="qxmlattributes.html#length">length</a>(); i++ ) {
<a name="x1969"></a><a name="x1968"></a> new <a href="qlistviewitem.html">QListViewItem</a>( element, attributes.<a href="qxmlattributes.html#qName">qName</a>(i), attributes.<a href="qxmlattributes.html#uri">uri</a>(i) );
}
}
return TRUE;
}
<a name="x1970"></a>bool StructureParser::<a href="qxmlcontenthandler.html#endElement">endElement</a>( const <a href="qstring.html">QString</a>&, const <a href="qstring.html">QString</a>&,
const <a href="qstring.html">QString</a>& )
{
stack.pop();
return TRUE;
}
</pre>
<p> <hr>
<p> Main:
<p> <pre>/****************************************************************************
** $Id: qt/tagreader.cpp 3.3.8 edited Jan 11 14:46 $
**
** Copyright (C) 2005-2007 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 "structureparser.h"
#include <<a href="qapplication-h.html">qapplication.h</a>>
#include <<a href="qfile-h.html">qfile.h</a>>
#include <<a href="qxml-h.html">qxml.h</a>>
#include <<a href="qlistview-h.html">qlistview.h</a>>
#include <<a href="qgrid-h.html">qgrid.h</a>>
#include <<a href="qmainwindow-h.html">qmainwindow.h</a>>
#include <<a href="qlabel-h.html">qlabel.h</a>>
int main( int argc, char **argv )
{
<a href="qapplication.html">QApplication</a> app( argc, argv );
<a href="qfile.html">QFile</a> xmlFile( argc == 2 ? argv[1] : "fnord.xml" );
<a href="qxmlinputsource.html">QXmlInputSource</a> source( &xmlFile );
<a href="qxmlsimplereader.html">QXmlSimpleReader</a> reader;
<a href="qgrid.html">QGrid</a> * container = new <a href="qgrid.html">QGrid</a>( 3 );
<a href="qlistview.html">QListView</a> * nameSpace = new <a href="qlistview.html">QListView</a>( container, "table_namespace" );
StructureParser * handler = new StructureParser( nameSpace );
<a name="x1977"></a> reader.<a href="qxmlreader.html#setContentHandler">setContentHandler</a>( handler );
<a name="x1976"></a> reader.<a href="qxmlsimplereader.html#parse">parse</a>( source );
<a href="qlistview.html">QListView</a> * namespacePrefix = new <a href="qlistview.html">QListView</a>( container,
"table_namespace_prefix" );
handler->setListView( namespacePrefix );
<a name="x1978"></a> reader.<a href="qxmlsimplereader.html#setFeature">setFeature</a>( "http://xml.org/sax/features/namespace-prefixes",
TRUE );
<a name="x1975"></a> source.<a href="qxmlinputsource.html#reset">reset</a>();
reader.<a href="qxmlsimplereader.html#parse">parse</a>( source );
<a href="qlistview.html">QListView</a> * prefix = new <a href="qlistview.html">QListView</a>( container, "table_prefix");
handler->setListView( prefix );
reader.<a href="qxmlsimplereader.html#setFeature">setFeature</a>( "http://xml.org/sax/features/namespaces", FALSE );
source.<a href="qxmlinputsource.html#reset">reset</a>();
reader.<a href="qxmlsimplereader.html#parse">parse</a>( source );
// namespace label
(void) new <a href="qlabel.html">QLabel</a>(
"Default:\n"
"http://xml.org/sax/features/namespaces: TRUE\n"
"http://xml.org/sax/features/namespace-prefixes: FALSE\n",
container );
// namespace prefix label
(void) new <a href="qlabel.html">QLabel</a>(
"\n"
"http://xml.org/sax/features/namespaces: TRUE\n"
"http://xml.org/sax/features/namespace-prefixes: TRUE\n",
container );
// prefix label
(void) new <a href="qlabel.html">QLabel</a>(
"\n"
"http://xml.org/sax/features/namespaces: FALSE\n"
"http://xml.org/sax/features/namespace-prefixes: TRUE\n",
container );
app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( container );
container-><a href="qwidget.html#show">show</a>();
return app.<a href="qapplication.html#exec">exec</a>();
}
</pre>
<p>See also <a href="xml-examples.html">Qt XML Examples</a>.
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