<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/espenr/tmp/qt-3.3.6-espenr-14571/qt-x11-free-3.3.6/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> <style type="text/css"><!-- fn { margin-left: 1cm; text-indent: -1cm; } a:link { color: #004faf; text-decoration: none } a:visited { color: #672967; text-decoration: none } body { background: #ffffff; color: black; } --></style> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr bgcolor="#E5E5E5"> <td valign=center> <a href="index.html"> <font color="#004faf">Home</font></a> | <a href="classes.html"> <font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"> <font color="#004faf">Main Classes</font></a> | <a href="annotated.html"> <font color="#004faf">Annotated</font></a> | <a href="groups.html"> <font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"> <font color="#004faf">Functions</font></a> </td> <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 3.3.6 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 3.3.6 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="f525"></a>StructureParser::StructureParser( <a href="qlistview.html">QListView</a> * t ) : <a href="qxmldefaulthandler.html">QXmlDefaultHandler</a>() { setListView( t ); } void <a name="f526"></a>StructureParser::setListView( <a href="qlistview.html">QListView</a> * t ) { table = t; table->setSorting( -1 ); table->addColumn( "Qualified name" ); table->addColumn( "Namespace" ); } <a name="x1957"></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="x1951"></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="x1952"></a> element-><a href="qlistviewitem.html#setOpen">setOpen</a>( TRUE ); <a name="x1953"></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="x1955"></a><a name="x1954"></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="x1956"></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 3.3.6 edited Aug 31 2005 $ ** ** Copyright (C) 2005 Trolltech AS. 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="x1963"></a> reader.<a href="qxmlreader.html#setContentHandler">setContentHandler</a>( handler ); <a name="x1962"></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="x1964"></a> reader.<a href="qxmlsimplereader.html#setFeature">setFeature</a>( "http://xml.org/sax/features/namespace-prefixes", TRUE ); <a name="x1961"></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>. <!-- eof --> <p><address><hr><div align=center> <table width=100% cellspacing=0 border=0><tr> <td>Copyright © 2005 <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> <td align=right><div align=right>Qt 3.3.6</div> </table></div></address></body> </html>