outliner-example.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/examples/xml/outliner/outliner.doc:5 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Outliner to show use of DOM</title><style type="text/css"><!--h3.fn,span.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>Outliner to show use of DOM</h1> <p> <p> This example presents a small outliner program to show the basic usage ofthe <a href="xml.html#dom">DOM classes</a>. The format of the outlinesis the OPML format as described in http://www.opml.org/spec.<p> This example shows how to load a DOM tree from an XML file and how totraverse it.<p> <hr><p> Sample XML file (todos.opml):<p> <pre><?xml version="1.0" encoding="ISO-8859-1"?><opml version="1.0"> <head> <title>Todo List</title> <dateCreated>Tue, 31 Oct 2000 17:00:17 CET</dateCreated> <dateModified>Tue, 31 Oct 2000 17:00:17 CET</dateModified> <ownerName>Arthur Dent</ownerName> <ownerEmail>info@trolltech.com</ownerEmail> </head> <body> <outline text="Background"> <outline text="This is an example todo list."/> </outline> <outline text="Books to read"> <outline text="Science Fiction"> <outline text="Philip K. Dick"> <outline text="Do Androids Dream of Electical Sheep?"/> <outline text="The Three Stigmata of Palmer Eldritch"/> </outline> <outline text="Robert A. Heinlein"> <outline text="Stranger in a Strange Land"/> </outline> <outline text="Isaac Asimov"> <outline text="Foundation and Empire"/> </outline> </outline> <outline text="Qt Books (in English)"> <outline text="Dalheimer: Programming with Qt"/> <outline text="Griffith: KDE 2/Qt Programming Bible"/> <outline text="Hughes: Linux Rapid Application Development"/> <outline text="Solin: <a href="qt.html">Qt</a> Programming in 24 hours"/> <outline text="Ward: <a href="qt.html">Qt</a> 2 Programming for Linux and Windows 2000"/> </outline> </outline> <outline text="Shopping list"> <outline text="General"> <outline text="Towel"/> <outline text="Hair dryer"/> <outline text="Underpants"/> </outline> <outline text="For Sunday"> <outline text="Beef"/> <outline text="Rice"/> <outline text="Carrots"/> <outline text="Beans"/> <outline text="Beer"/> <outline text="Wine"/> <outline text="Orange juice"/> </outline> </outline> <outline text="Write a letter to Ford"> </outline> </body></opml></pre><p> <hr><p> Header file (outlinetree.h):<p> <pre>/****************************************************************************** $Id: qt/outlinetree.h 3.0.5 edited Oct 12 2001 $**** Copyright (C) 1992-2000 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.*******************************************************************************/#ifndef OUTLINETREE_H#define OUTLINETREE_H#include <<a href="qlistview-h.html">qlistview.h</a>>#include <<a href="qdom-h.html">qdom.h</a>>class OutlineTree : public <a href="qlistview.html">QListView</a>{ <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>public: OutlineTree( const <a href="qstring.html">QString</a> fileName, QWidget *parent = 0, const char *name = 0 ); ~OutlineTree();private: <a href="qdomdocument.html">QDomDocument</a> domTree; void getHeaderInformation( const <a href="qdomelement.html">QDomElement</a> &header ); void buildTree( <a href="qlistviewitem.html">QListViewItem</a> *parentItem, const <a href="qdomelement.html">QDomElement</a> &parentElement );};#endif // OUTLINETREE_H</pre><p> <hr><p> Implementation (outlinetree.cpp):<p> <pre>/****************************************************************************** $Id: qt/outlinetree.cpp 3.0.5 edited Oct 12 2001 $**** Copyright (C) 1992-2000 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 "outlinetree.h"#include <<a href="qfile-h.html">qfile.h</a>>#include <<a href="qmessagebox-h.html">qmessagebox.h</a>><a name="f521"></a>OutlineTree::OutlineTree( const <a href="qstring.html">QString</a> fileName, QWidget *parent, const char *name ) : <a href="qlistview.html">QListView</a>( parent, name ){ // div. configuration of the list view <a href="qlistview.html#addColumn">addColumn</a>( "Outlines" ); <a href="qlistview.html#setSorting">setSorting</a>( -1 ); <a href="qlistview.html#setRootIsDecorated">setRootIsDecorated</a>( TRUE ); // read the XML file and create DOM tree <a href="qfile.html">QFile</a> opmlFile( fileName );<a name="x1904"></a> if ( !opmlFile.<a href="qfile.html#open">open</a>( <a href="qfile.html#open">IO_ReadOnly</a> ) ) {<a name="x1906"></a> QMessageBox::<a href="qmessagebox.html#critical">critical</a>( 0, <a href="qobject.html#tr">tr</a>( "Critical Error" ), <a href="qobject.html#tr">tr</a>( "Cannot open file %1" ).arg( fileName ) ); return; } if ( !domTree.setContent( &opmlFile ) ) { QMessageBox::<a href="qmessagebox.html#critical">critical</a>( 0, <a href="qobject.html#tr">tr</a>( "Critical Error" ), <a href="qobject.html#tr">tr</a>( "Parsing error for file %1" ).arg( fileName ) );<a name="x1903"></a> opmlFile.<a href="qfile.html#close">close</a>(); return; } opmlFile.<a href="qfile.html#close">close</a>(); // get the header information from the DOM <a href="qdomelement.html">QDomElement</a> root = domTree.documentElement(); <a href="qdomnode.html">QDomNode</a> node;<a name="x1896"></a> node = root.<a href="qdomnode.html#firstChild">firstChild</a>();<a name="x1898"></a> while ( !node.<a href="qdomnode.html#isNull">isNull</a>() ) {<a name="x1900"></a><a name="x1897"></a> if ( node.<a href="qdomnode.html#isElement">isElement</a>() && node.<a href="qdomnode.html#nodeName">nodeName</a>() == "head" ) {<a name="x1902"></a> <a href="qdomelement.html">QDomElement</a> header = node.<a href="qdomnode.html#toElement">toElement</a>(); getHeaderInformation( header ); break; }<a name="x1899"></a> node = node.<a href="qdomnode.html#nextSibling">nextSibling</a>(); } // create the tree view out of the DOM node = root.<a href="qdomnode.html#firstChild">firstChild</a>(); while ( !node.<a href="qdomnode.html#isNull">isNull</a>() ) { if ( node.<a href="qdomnode.html#isElement">isElement</a>() && node.<a href="qdomnode.html#nodeName">nodeName</a>() == "body" ) { <a href="qdomelement.html">QDomElement</a> body = node.<a href="qdomnode.html#toElement">toElement</a>(); buildTree( 0, body ); break; } node = node.<a href="qdomnode.html#nextSibling">nextSibling</a>(); }}OutlineTree::~OutlineTree(){}void <a name="f522"></a>OutlineTree::getHeaderInformation( const <a href="qdomelement.html">QDomElement</a> &header ){ // visit all children of the header element and look if you can make // something with it <a href="qdomnode.html">QDomNode</a> node = header.<a href="qdomnode.html#firstChild">firstChild</a>(); while ( !node.<a href="qdomnode.html#isNull">isNull</a>() ) { if ( node.<a href="qdomnode.html#isElement">isElement</a>() ) { // case for the different header entries if ( node.<a href="qdomnode.html#nodeName">nodeName</a>() == "title" ) { <a href="qdomtext.html">QDomText</a> textChild = node.<a href="qdomnode.html#firstChild">firstChild</a>().toText(); if ( !textChild.<a href="qdomnode.html#isNull">isNull</a>() ) {<a name="x1901"></a> <a href="qlistview.html#setColumnText">setColumnText</a>( 0, textChild.<a href="qdomnode.html#nodeValue">nodeValue</a>() ); } } } node = node.<a href="qdomnode.html#nextSibling">nextSibling</a>(); }}void <a name="f523"></a>OutlineTree::buildTree( <a href="qlistviewitem.html">QListViewItem</a> *parentItem, const <a href="qdomelement.html">QDomElement</a> &parentElement ){ <a href="qlistviewitem.html">QListViewItem</a> *thisItem = 0; <a href="qdomnode.html">QDomNode</a> node = parentElement.<a href="qdomnode.html#firstChild">firstChild</a>(); while ( !node.<a href="qdomnode.html#isNull">isNull</a>() ) { if ( node.<a href="qdomnode.html#isElement">isElement</a>() && node.<a href="qdomnode.html#nodeName">nodeName</a>() == "outline" ) { // add a new list view item for the outline if ( parentItem == 0 ) thisItem = new <a href="qlistviewitem.html">QListViewItem</a>( this, thisItem ); else thisItem = new <a href="qlistviewitem.html">QListViewItem</a>( parentItem, thisItem );<a name="x1905"></a> thisItem-><a href="qlistviewitem.html#setText">setText</a>( 0, node.<a href="qdomnode.html#toElement">toElement</a>().attribute( "text" ) ); // recursive build of the tree buildTree( thisItem, node.<a href="qdomnode.html#toElement">toElement</a>() ); } node = node.<a href="qdomnode.html#nextSibling">nextSibling</a>(); }}</pre><p> <hr><p> Main (main.cpp):<p> <pre>/****************************************************************************** $Id: qt/main.cpp 3.0.5 edited Oct 12 2001 $**** Copyright (C) 1992-2000 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 <<a href="qapplication-h.html">qapplication.h</a>>#include "outlinetree.h"int main( int argc, char **argv ){ <a href="qapplication.html">QApplication</a> a( argc, argv ); OutlineTree outline( "todos.opml" );<a name="x1908"></a> a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &outline );<a name="x1909"></a> outline.<a href="qwidget.html#show">show</a>();<a name="x1907"></a> return a.<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 © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
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