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280 lines
13 KiB
280 lines
13 KiB
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /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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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Outliner to show use of DOM</title>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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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>Outliner to show use of DOM</h1>
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<p>
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<p> This example presents a small outliner program to show the basic usage of
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the <a href="xml.html#dom">DOM classes</a>. The format of the outlines
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is the OPML format as described in http://www.opml.org/spec.
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<p> This example shows how to load a DOM tree from an XML file and how to
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traverse it.
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<p> <hr>
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<p> Sample XML file (todos.opml):
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<p> <pre><?xml version="1.0" encoding="ISO-8859-1"?>
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<opml version="1.0">
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<head>
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<title>Todo List</title>
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<dateCreated>Tue, 31 Oct 2000 17:00:17 CET</dateCreated>
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<dateModified>Tue, 31 Oct 2000 17:00:17 CET</dateModified>
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<ownerName>Arthur Dent</ownerName>
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<ownerEmail>info@trolltech.com</ownerEmail>
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</head>
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<body>
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<outline text="Background">
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<outline text="This is an example todo list."/>
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</outline>
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<outline text="Books to read">
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<outline text="Science Fiction">
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<outline text="Philip K. Dick">
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<outline text="Do Androids Dream of Electical Sheep?"/>
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<outline text="The Three Stigmata of Palmer Eldritch"/>
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</outline>
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<outline text="Robert A. Heinlein">
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<outline text="Stranger in a Strange Land"/>
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</outline>
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<outline text="Isaac Asimov">
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<outline text="Foundation and Empire"/>
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</outline>
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</outline>
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<outline text="TQt Books (in English)">
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<outline text="Blanchette &amp; Summerfield: C++ GUI Programming with TQt 3"/>
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<outline text="Dalheimer: Programming with TQt"/>
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<outline text="Griffith: KDE 2/TQt Programming Bible"/>
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<outline text="Hughes: Linux Rapid Application Development"/>
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<outline text="Solin: <a href="ntqt.html">TQt</a> Programming in 24 hours"/>
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<outline text="Ward: <a href="ntqt.html">TQt</a> 2 Programming for Linux and Windows 2000"/>
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</outline>
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</outline>
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<outline text="Shopping list">
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<outline text="General">
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<outline text="Towel"/>
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<outline text="Hair dryer"/>
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<outline text="Underpants"/>
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</outline>
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<outline text="For Sunday">
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<outline text="Beef"/>
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<outline text="Rice"/>
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<outline text="Carrots"/>
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<outline text="Beans"/>
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<outline text="Beer"/>
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<outline text="Wine"/>
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<outline text="Orange juice"/>
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</outline>
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</outline>
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<outline text="Write a letter to Ford">
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</outline>
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</body>
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</opml>
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</pre>
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<p> <hr>
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<p> Header file (outlinetree.h):
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<p> <pre>/****************************************************************************
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** $Id: qt/outlinetree.h 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#ifndef OUTLINETREE_H
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#define OUTLINETREE_H
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#include <<a href="qlistview-h.html">ntqlistview.h</a>>
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#include <<a href="tqdom-h.html">tqdom.h</a>>
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class OutlineTree : public <a href="ntqlistview.html">TQListView</a>
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{
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<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
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public:
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OutlineTree( const <a href="tqstring.html">TQString</a> fileName, TQWidget *parent = 0, const char *name = 0 );
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~OutlineTree();
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private:
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<a href="tqdomdocument.html">TQDomDocument</a> domTree;
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void getHeaderInformation( const <a href="tqdomelement.html">TQDomElement</a> &header );
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void buildTree( <a href="qlistviewitem.html">TQListViewItem</a> *parentItem, const <a href="tqdomelement.html">TQDomElement</a> &parentElement );
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};
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#endif // OUTLINETREE_H
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</pre>
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<p> <hr>
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<p> Implementation (outlinetree.cpp):
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<p> <pre>/****************************************************************************
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** $Id: qt/outlinetree.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "outlinetree.h"
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#include <<a href="qfile-h.html">ntqfile.h</a>>
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#include <<a href="qmessagebox-h.html">ntqmessagebox.h</a>>
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<a name="f522"></a>OutlineTree::OutlineTree( const <a href="tqstring.html">TQString</a> fileName, TQWidget *parent, const char *name )
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: <a href="ntqlistview.html">TQListView</a>( parent, name )
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{
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// div. configuration of the list view
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<a href="ntqlistview.html#addColumn">addColumn</a>( "Outlines" );
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<a href="ntqlistview.html#setSorting">setSorting</a>( -1 );
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<a href="ntqlistview.html#setRootIsDecorated">setRootIsDecorated</a>( TRUE );
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// read the XML file and create DOM tree
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<a href="ntqfile.html">TQFile</a> opmlFile( fileName );
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<a name="x1915"></a> if ( !opmlFile.<a href="ntqfile.html#open">open</a>( <a href="ntqfile.html#open">IO_ReadOnly</a> ) ) {
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<a name="x1917"></a> TQMessageBox::<a href="ntqmessagebox.html#critical">critical</a>( 0,
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<a href="tqobject.html#tr">tr</a>( "Critical Error" ),
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<a href="tqobject.html#tr">tr</a>( "Cannot open file %1" ).arg( fileName ) );
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return;
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}
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if ( !domTree.setContent( &opmlFile ) ) {
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TQMessageBox::<a href="ntqmessagebox.html#critical">critical</a>( 0,
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<a href="tqobject.html#tr">tr</a>( "Critical Error" ),
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<a href="tqobject.html#tr">tr</a>( "Parsing error for file %1" ).arg( fileName ) );
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<a name="x1914"></a> opmlFile.<a href="ntqfile.html#close">close</a>();
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return;
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}
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opmlFile.<a href="ntqfile.html#close">close</a>();
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// get the header information from the DOM
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<a href="tqdomelement.html">TQDomElement</a> root = domTree.documentElement();
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<a href="tqdomnode.html">TQDomNode</a> node;
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<a name="x1907"></a> node = root.<a href="tqdomnode.html#firstChild">firstChild</a>();
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<a name="x1909"></a> while ( !node.<a href="tqdomnode.html#isNull">isNull</a>() ) {
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<a name="x1911"></a><a name="x1908"></a> if ( node.<a href="tqdomnode.html#isElement">isElement</a>() && node.<a href="tqdomnode.html#nodeName">nodeName</a>() == "head" ) {
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<a name="x1913"></a> <a href="tqdomelement.html">TQDomElement</a> header = node.<a href="tqdomnode.html#toElement">toElement</a>();
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getHeaderInformation( header );
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break;
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}
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<a name="x1910"></a> node = node.<a href="tqdomnode.html#nextSibling">nextSibling</a>();
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}
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// create the tree view out of the DOM
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node = root.<a href="tqdomnode.html#firstChild">firstChild</a>();
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while ( !node.<a href="tqdomnode.html#isNull">isNull</a>() ) {
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if ( node.<a href="tqdomnode.html#isElement">isElement</a>() && node.<a href="tqdomnode.html#nodeName">nodeName</a>() == "body" ) {
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<a href="tqdomelement.html">TQDomElement</a> body = node.<a href="tqdomnode.html#toElement">toElement</a>();
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buildTree( 0, body );
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break;
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}
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node = node.<a href="tqdomnode.html#nextSibling">nextSibling</a>();
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}
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}
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OutlineTree::~OutlineTree()
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{
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}
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void <a name="f523"></a>OutlineTree::getHeaderInformation( const <a href="tqdomelement.html">TQDomElement</a> &header )
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{
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// visit all children of the header element and look if you can make
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// something with it
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<a href="tqdomnode.html">TQDomNode</a> node = header.<a href="tqdomnode.html#firstChild">firstChild</a>();
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while ( !node.<a href="tqdomnode.html#isNull">isNull</a>() ) {
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if ( node.<a href="tqdomnode.html#isElement">isElement</a>() ) {
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// case for the different header entries
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if ( node.<a href="tqdomnode.html#nodeName">nodeName</a>() == "title" ) {
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<a href="tqdomtext.html">TQDomText</a> textChild = node.<a href="tqdomnode.html#firstChild">firstChild</a>().toText();
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if ( !textChild.<a href="tqdomnode.html#isNull">isNull</a>() ) {
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<a name="x1912"></a> <a href="ntqlistview.html#setColumnText">setColumnText</a>( 0, textChild.<a href="tqdomnode.html#nodeValue">nodeValue</a>() );
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}
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}
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}
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node = node.<a href="tqdomnode.html#nextSibling">nextSibling</a>();
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}
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}
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void <a name="f524"></a>OutlineTree::buildTree( <a href="qlistviewitem.html">TQListViewItem</a> *parentItem, const <a href="tqdomelement.html">TQDomElement</a> &parentElement )
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{
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<a href="qlistviewitem.html">TQListViewItem</a> *thisItem = 0;
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<a href="tqdomnode.html">TQDomNode</a> node = parentElement.<a href="tqdomnode.html#firstChild">firstChild</a>();
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while ( !node.<a href="tqdomnode.html#isNull">isNull</a>() ) {
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if ( node.<a href="tqdomnode.html#isElement">isElement</a>() && node.<a href="tqdomnode.html#nodeName">nodeName</a>() == "outline" ) {
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// add a new list view item for the outline
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if ( parentItem == 0 )
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thisItem = new <a href="qlistviewitem.html">TQListViewItem</a>( this, thisItem );
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else
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thisItem = new <a href="qlistviewitem.html">TQListViewItem</a>( parentItem, thisItem );
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<a name="x1916"></a> thisItem-><a href="qlistviewitem.html#setText">setText</a>( 0, node.<a href="tqdomnode.html#toElement">toElement</a>().attribute( "text" ) );
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// recursive build of the tree
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buildTree( thisItem, node.<a href="tqdomnode.html#toElement">toElement</a>() );
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}
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node = node.<a href="tqdomnode.html#nextSibling">nextSibling</a>();
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}
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}
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</pre>
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<p> <hr>
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<p> Main (main.cpp):
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<p> <pre>/****************************************************************************
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** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:37 $
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**
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** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include <<a href="qapplication-h.html">ntqapplication.h</a>>
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#include "outlinetree.h"
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int main( int argc, char **argv )
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{
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<a href="ntqapplication.html">TQApplication</a> a( argc, argv );
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OutlineTree outline( "todos.opml" );
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a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( &outline );
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<a name="x1920"></a> outline.<a href="tqwidget.html#show">show</a>();
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return a.<a href="ntqapplication.html#exec">exec</a>();
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}
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</pre>
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<p>See also <a href="xml-examples.html">TQt XML Examples</a>.
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<!-- eof -->
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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</table></div></address></body>
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</html>
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