| 1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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| 2 | <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/xml/outliner/outliner.doc:5 -->
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| 3 | <html>
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| 4 | <head>
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| 5 | <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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| 6 | <title>Outliner to show use of DOM</title>
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| 7 | <style type="text/css"><!--
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| 8 | fn { margin-left: 1cm; text-indent: -1cm; }
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| 9 | a:link { color: #004faf; text-decoration: none }
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| 10 | a:visited { color: #672967; text-decoration: none }
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| 11 | body { background: #ffffff; color: black; }
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| 12 | --></style>
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| 13 | </head>
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| 14 | <body>
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| 15 |
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| 16 | <table border="0" cellpadding="0" cellspacing="0" width="100%">
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| 17 | <tr bgcolor="#E5E5E5">
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| 18 | <td valign=center>
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| 19 | <a href="index.html">
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| 20 | <font color="#004faf">Home</font></a>
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| 21 | | <a href="classes.html">
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| 22 | <font color="#004faf">All Classes</font></a>
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| 23 | | <a href="mainclasses.html">
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| 24 | <font color="#004faf">Main Classes</font></a>
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| 25 | | <a href="annotated.html">
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| 26 | <font color="#004faf">Annotated</font></a>
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| 27 | | <a href="groups.html">
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| 28 | <font color="#004faf">Grouped Classes</font></a>
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| 29 | | <a href="functions.html">
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| 30 | <font color="#004faf">Functions</font></a>
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| 31 | </td>
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| 32 | <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>
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| 33 |
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| 34 |
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| 35 | <p>
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| 36 | <p> This example presents a small outliner program to show the basic usage of
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| 37 | the <a href="xml.html#dom">DOM classes</a>. The format of the outlines
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| 38 | is the OPML format as described in http://www.opml.org/spec.
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| 39 | <p> This example shows how to load a DOM tree from an XML file and how to
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| 40 | traverse it.
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| 41 | <p> <hr>
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| 42 | <p> Sample XML file (todos.opml):
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| 43 | <p> <pre><?xml version="1.0" encoding="ISO-8859-1"?>
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| 44 | <opml version="1.0">
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| 45 | <head>
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| 46 | <title>Todo List</title>
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| 47 | <dateCreated>Tue, 31 Oct 2000 17:00:17 CET</dateCreated>
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| 48 | <dateModified>Tue, 31 Oct 2000 17:00:17 CET</dateModified>
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| 49 | <ownerName>Arthur Dent</ownerName>
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| 50 | <ownerEmail>info@trolltech.com</ownerEmail>
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| 51 | </head>
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| 52 | <body>
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| 53 | <outline text="Background">
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| 54 | <outline text="This is an example todo list."/>
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| 55 | </outline>
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| 56 | <outline text="Books to read">
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| 57 | <outline text="Science Fiction">
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| 58 | <outline text="Philip K. Dick">
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| 59 | <outline text="Do Androids Dream of Electical Sheep?"/>
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| 60 | <outline text="The Three Stigmata of Palmer Eldritch"/>
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| 61 | </outline>
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| 62 | <outline text="Robert A. Heinlein">
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| 63 | <outline text="Stranger in a Strange Land"/>
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| 64 | </outline>
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| 65 | <outline text="Isaac Asimov">
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| 66 | <outline text="Foundation and Empire"/>
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| 67 | </outline>
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| 68 | </outline>
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| 69 | <outline text="Qt Books (in English)">
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| 70 | <outline text="Blanchette &amp; Summerfield: C++ GUI Programming with Qt 3"/>
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| 71 | <outline text="Dalheimer: Programming with Qt"/>
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| 72 | <outline text="Griffith: KDE 2/Qt Programming Bible"/>
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| 73 | <outline text="Hughes: Linux Rapid Application Development"/>
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| 74 | <outline text="Solin: <a href="qt.html">Qt</a> Programming in 24 hours"/>
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| 75 | <outline text="Ward: <a href="qt.html">Qt</a> 2 Programming for Linux and Windows 2000"/>
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| 76 | </outline>
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| 77 | </outline>
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| 78 | <outline text="Shopping list">
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| 79 | <outline text="General">
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| 80 | <outline text="Towel"/>
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| 81 | <outline text="Hair dryer"/>
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| 82 | <outline text="Underpants"/>
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| 83 | </outline>
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| 84 | <outline text="For Sunday">
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| 85 | <outline text="Beef"/>
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| 86 | <outline text="Rice"/>
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| 87 | <outline text="Carrots"/>
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| 88 | <outline text="Beans"/>
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| 89 | <outline text="Beer"/>
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| 90 | <outline text="Wine"/>
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| 91 | <outline text="Orange juice"/>
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| 92 | </outline>
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| 93 | </outline>
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| 94 | <outline text="Write a letter to Ford">
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| 95 | </outline>
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| 96 | </body>
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| 97 | </opml>
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| 98 | </pre>
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| 99 |
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| 100 | <p> <hr>
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| 101 | <p> Header file (outlinetree.h):
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| 102 | <p> <pre>/****************************************************************************
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| 103 | ** $Id: outliner-example.html 2051 2007-02-21 10:04:20Z chehrlic $
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| 104 | **
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| 105 | ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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| 106 | **
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| 107 | ** This file is part of an example program for Qt. This example
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| 108 | ** program may be used, distributed and modified without limitation.
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| 109 | **
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| 110 | *****************************************************************************/
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| 111 |
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| 112 | #ifndef OUTLINETREE_H
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| 113 | #define OUTLINETREE_H
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| 114 |
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| 115 | #include <<a href="qlistview-h.html">qlistview.h</a>>
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| 116 | #include <<a href="qdom-h.html">qdom.h</a>>
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| 117 |
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| 118 | class OutlineTree : public <a href="qlistview.html">QListView</a>
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| 119 | {
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| 120 | <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
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| 121 |
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| 122 | public:
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| 123 | OutlineTree( const <a href="qstring.html">QString</a> fileName, QWidget *parent = 0, const char *name = 0 );
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| 124 | ~OutlineTree();
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| 125 |
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| 126 | private:
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| 127 | <a href="qdomdocument.html">QDomDocument</a> domTree;
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| 128 | void getHeaderInformation( const <a href="qdomelement.html">QDomElement</a> &header );
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| 129 | void buildTree( <a href="qlistviewitem.html">QListViewItem</a> *parentItem, const <a href="qdomelement.html">QDomElement</a> &parentElement );
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| 130 | };
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| 131 |
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| 132 | #endif // OUTLINETREE_H
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| 133 | </pre>
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| 134 |
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| 135 | <p> <hr>
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| 136 | <p> Implementation (outlinetree.cpp):
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| 137 | <p> <pre>/****************************************************************************
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| 138 | ** $Id: outliner-example.html 2051 2007-02-21 10:04:20Z chehrlic $
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| 139 | **
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| 140 | ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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| 141 | **
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| 142 | ** This file is part of an example program for Qt. This example
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| 143 | ** program may be used, distributed and modified without limitation.
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| 144 | **
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| 145 | *****************************************************************************/
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| 146 |
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| 147 | #include "outlinetree.h"
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| 148 | #include <<a href="qfile-h.html">qfile.h</a>>
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| 149 | #include <<a href="qmessagebox-h.html">qmessagebox.h</a>>
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| 150 |
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| 151 | <a name="f522"></a>OutlineTree::OutlineTree( const <a href="qstring.html">QString</a> fileName, QWidget *parent, const char *name )
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| 152 | : <a href="qlistview.html">QListView</a>( parent, name )
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| 153 | {
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| 154 | // div. configuration of the list view
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| 155 | <a href="qlistview.html#addColumn">addColumn</a>( "Outlines" );
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| 156 | <a href="qlistview.html#setSorting">setSorting</a>( -1 );
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| 157 | <a href="qlistview.html#setRootIsDecorated">setRootIsDecorated</a>( TRUE );
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| 158 |
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| 159 | // read the XML file and create DOM tree
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| 160 | <a href="qfile.html">QFile</a> opmlFile( fileName );
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| 161 | <a name="x1915"></a> if ( !opmlFile.<a href="qfile.html#open">open</a>( <a href="qfile.html#open">IO_ReadOnly</a> ) ) {
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| 162 | <a name="x1917"></a> QMessageBox::<a href="qmessagebox.html#critical">critical</a>( 0,
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| 163 | <a href="qobject.html#tr">tr</a>( "Critical Error" ),
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| 164 | <a href="qobject.html#tr">tr</a>( "Cannot open file %1" ).arg( fileName ) );
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| 165 | return;
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| 166 | }
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| 167 | if ( !domTree.setContent( &opmlFile ) ) {
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| 168 | QMessageBox::<a href="qmessagebox.html#critical">critical</a>( 0,
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| 169 | <a href="qobject.html#tr">tr</a>( "Critical Error" ),
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| 170 | <a href="qobject.html#tr">tr</a>( "Parsing error for file %1" ).arg( fileName ) );
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| 171 | <a name="x1914"></a> opmlFile.<a href="qfile.html#close">close</a>();
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| 172 | return;
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| 173 | }
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| 174 | opmlFile.<a href="qfile.html#close">close</a>();
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| 175 |
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| 176 | // get the header information from the DOM
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| 177 | <a href="qdomelement.html">QDomElement</a> root = domTree.documentElement();
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| 178 | <a href="qdomnode.html">QDomNode</a> node;
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| 179 | <a name="x1907"></a> node = root.<a href="qdomnode.html#firstChild">firstChild</a>();
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| 180 | <a name="x1909"></a> while ( !node.<a href="qdomnode.html#isNull">isNull</a>() ) {
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| 181 | <a name="x1911"></a><a name="x1908"></a> if ( node.<a href="qdomnode.html#isElement">isElement</a>() && node.<a href="qdomnode.html#nodeName">nodeName</a>() == "head" ) {
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| 182 | <a name="x1913"></a> <a href="qdomelement.html">QDomElement</a> header = node.<a href="qdomnode.html#toElement">toElement</a>();
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| 183 | getHeaderInformation( header );
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| 184 | break;
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| 185 | }
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| 186 | <a name="x1910"></a> node = node.<a href="qdomnode.html#nextSibling">nextSibling</a>();
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| 187 | }
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| 188 | // create the tree view out of the DOM
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| 189 | node = root.<a href="qdomnode.html#firstChild">firstChild</a>();
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| 190 | while ( !node.<a href="qdomnode.html#isNull">isNull</a>() ) {
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| 191 | if ( node.<a href="qdomnode.html#isElement">isElement</a>() && node.<a href="qdomnode.html#nodeName">nodeName</a>() == "body" ) {
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| 192 | <a href="qdomelement.html">QDomElement</a> body = node.<a href="qdomnode.html#toElement">toElement</a>();
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| 193 | buildTree( 0, body );
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| 194 | break;
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| 195 | }
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| 196 | node = node.<a href="qdomnode.html#nextSibling">nextSibling</a>();
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| 197 | }
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| 198 | }
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| 199 |
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| 200 | OutlineTree::~OutlineTree()
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| 201 | {
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| 202 | }
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| 203 |
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| 204 | void <a name="f523"></a>OutlineTree::getHeaderInformation( const <a href="qdomelement.html">QDomElement</a> &header )
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| 205 | {
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| 206 | // visit all children of the header element and look if you can make
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| 207 | // something with it
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| 208 | <a href="qdomnode.html">QDomNode</a> node = header.<a href="qdomnode.html#firstChild">firstChild</a>();
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| 209 | while ( !node.<a href="qdomnode.html#isNull">isNull</a>() ) {
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| 210 | if ( node.<a href="qdomnode.html#isElement">isElement</a>() ) {
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| 211 | // case for the different header entries
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| 212 | if ( node.<a href="qdomnode.html#nodeName">nodeName</a>() == "title" ) {
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| 213 | <a href="qdomtext.html">QDomText</a> textChild = node.<a href="qdomnode.html#firstChild">firstChild</a>().toText();
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| 214 | if ( !textChild.<a href="qdomnode.html#isNull">isNull</a>() ) {
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| 215 | <a name="x1912"></a> <a href="qlistview.html#setColumnText">setColumnText</a>( 0, textChild.<a href="qdomnode.html#nodeValue">nodeValue</a>() );
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| 216 | }
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| 217 | }
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| 218 | }
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| 219 | node = node.<a href="qdomnode.html#nextSibling">nextSibling</a>();
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| 220 | }
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| 221 | }
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| 222 |
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| 223 | void <a name="f524"></a>OutlineTree::buildTree( <a href="qlistviewitem.html">QListViewItem</a> *parentItem, const <a href="qdomelement.html">QDomElement</a> &parentElement )
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| 224 | {
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| 225 | <a href="qlistviewitem.html">QListViewItem</a> *thisItem = 0;
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| 226 | <a href="qdomnode.html">QDomNode</a> node = parentElement.<a href="qdomnode.html#firstChild">firstChild</a>();
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| 227 | while ( !node.<a href="qdomnode.html#isNull">isNull</a>() ) {
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| 228 | if ( node.<a href="qdomnode.html#isElement">isElement</a>() && node.<a href="qdomnode.html#nodeName">nodeName</a>() == "outline" ) {
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| 229 | // add a new list view item for the outline
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| 230 | if ( parentItem == 0 )
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| 231 | thisItem = new <a href="qlistviewitem.html">QListViewItem</a>( this, thisItem );
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| 232 | else
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| 233 | thisItem = new <a href="qlistviewitem.html">QListViewItem</a>( parentItem, thisItem );
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| 234 | <a name="x1916"></a> thisItem-><a href="qlistviewitem.html#setText">setText</a>( 0, node.<a href="qdomnode.html#toElement">toElement</a>().attribute( "text" ) );
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| 235 | // recursive build of the tree
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| 236 | buildTree( thisItem, node.<a href="qdomnode.html#toElement">toElement</a>() );
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| 237 | }
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| 238 | node = node.<a href="qdomnode.html#nextSibling">nextSibling</a>();
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| 239 | }
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| 240 | }
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| 241 | </pre>
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| 242 |
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| 243 | <p> <hr>
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| 244 | <p> Main (main.cpp):
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| 245 | <p> <pre>/****************************************************************************
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| 246 | ** $Id: outliner-example.html 2051 2007-02-21 10:04:20Z chehrlic $
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| 247 | **
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| 248 | ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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| 249 | **
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| 250 | ** This file is part of an example program for Qt. This example
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| 251 | ** program may be used, distributed and modified without limitation.
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| 252 | **
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| 253 | *****************************************************************************/
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| 254 |
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| 255 | #include <<a href="qapplication-h.html">qapplication.h</a>>
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| 256 | #include "outlinetree.h"
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| 257 |
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| 258 | int main( int argc, char **argv )
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| 259 | {
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| 260 | <a href="qapplication.html">QApplication</a> a( argc, argv );
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| 261 |
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| 262 | OutlineTree outline( "todos.opml" );
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| 263 | a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &outline );
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| 264 | <a name="x1920"></a> outline.<a href="qwidget.html#show">show</a>();
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| 265 |
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| 266 | return a.<a href="qapplication.html#exec">exec</a>();
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| 267 | }
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| 268 | </pre>
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| 269 |
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| 270 | <p>See also <a href="xml-examples.html">Qt XML Examples</a>.
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| 271 |
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| 272 | <!-- eof -->
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| 273 | <p><address><hr><div align=center>
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| 274 | <table width=100% cellspacing=0 border=0><tr>
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| 275 | <td>Copyright © 2007
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| 276 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 277 | <td align=right><div align=right>Qt 3.3.8</div>
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| 278 | </table></div></address></body>
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| 279 | </html>
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