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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">xbeltree.cpp Example File<br /><small><small>xml/dombookmarks/xbeltree.cpp</small></small></h1>

<pre>  /****************************************************************************

** This file is part of the documentation of the Qt Toolkit.

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** as defined by Trolltech AS of Norway and appearing in the file

** LICENSE.QPL included in the packaging of this file.

** This file may be distributed and/or modified under the terms of the

** GNU General Public License version 2 as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL included in the

** packaging of this file.

** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for

** information about Qt Commercial License Agreements.

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** See http://www.trolltech.com/gpl/ for GPL licensing information.

** Contact info@trolltech.com if any conditions of this licensing are

** not clear to you.

** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE

** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

****************************************************************************/

#include <QtGui>

#include "xbeltree.h"

XbelTree::XbelTree(QWidget *parent)

: QTreeWidget(parent)

{

QStringList labels;

labels << tr("Title") << tr("Location");

header()->setResizeMode(QHeaderView::Stretch);

setHeaderLabels(labels);

folderIcon.addPixmap(style()->standardPixmap(QStyle::SP_DirClosedIcon),

QIcon::Normal, QIcon::Off);

folderIcon.addPixmap(style()->standardPixmap(QStyle::SP_DirOpenIcon),

QIcon::Normal, QIcon::On);

bookmarkIcon.addPixmap(style()->standardPixmap(QStyle::SP_FileIcon));

}

bool XbelTree::read(QIODevice *device)

{

QString errorStr;

int errorLine;

int errorColumn;

if (!domDocument.setContent(device, true, &errorStr, &errorLine,

&errorColumn)) {

QMessageBox::information(window(), tr("DOM Bookmarks"),

tr("Parse error at line %1, column %2:\n%3")

.arg(errorLine)

.arg(errorColumn)

.arg(errorStr));

return false;

}

QDomElement root = domDocument.documentElement();

if (root.tagName() != "xbel") {

QMessageBox::information(window(), tr("DOM Bookmarks"),

tr("The file is not an XBEL file."));

return false;

} else if (root.hasAttribute("version")

&& root.attribute("version") != "1.0") {

QMessageBox::information(window(), tr("DOM Bookmarks"),

tr("The file is not an XBEL version 1.0 "

"file."));

return false;

}

clear();

disconnect(this, SIGNAL(itemChanged(QTreeWidgetItem *, int)),

100

this, SLOT(updateDomElement(QTreeWidgetItem *, int)));

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QDomElement child = root.firstChildElement("folder");

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while (!child.isNull()) {

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parseFolderElement(child);

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child = child.nextSiblingElement("folder");

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}

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connect(this, SIGNAL(itemChanged(QTreeWidgetItem *, int)),

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this, SLOT(updateDomElement(QTreeWidgetItem *, int)));

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return true;

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}

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bool XbelTree::write(QIODevice *device)

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{

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const int IndentSize = 4;

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QTextStream out(device);

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domDocument.save(out, IndentSize);

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return true;

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}

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void XbelTree::updateDomElement(QTreeWidgetItem *item, int column)

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{

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QDomElement element = domElementForItem.value(item);

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if (!element.isNull()) {

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if (column == 0) {

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QDomElement oldTitleElement = element.firstChildElement("title");

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QDomElement newTitleElement = domDocument.createElement("title");

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QDomText newTitleText = domDocument.createTextNode(item->text(0));

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newTitleElement.appendChild(newTitleText);

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element.replaceChild(newTitleElement, oldTitleElement);

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} else {

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if (element.tagName() == "bookmark")

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element.setAttribute("href", item->text(1));

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}

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}

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}

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void XbelTree::parseFolderElement(const QDomElement &element,

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QTreeWidgetItem *parentItem)

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{

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QTreeWidgetItem *item = createItem(element, parentItem);

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QString title = element.firstChildElement("title").text();

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if (title.isEmpty())

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title = QObject::tr("Folder");

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item->setFlags(item->flags() | Qt::ItemIsEditable);

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item->setIcon(0, folderIcon);

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item->setText(0, title);

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bool folded = (element.attribute("folded") != "no");

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setItemExpanded(item, !folded);

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QDomElement child = element.firstChildElement();

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while (!child.isNull()) {

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if (child.tagName() == "folder") {

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parseFolderElement(child, item);

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} else if (child.tagName() == "bookmark") {

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QTreeWidgetItem *childItem = createItem(child, item);

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QString title = child.firstChildElement("title").text();

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if (title.isEmpty())

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title = QObject::tr("Folder");

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childItem->setFlags(item->flags() | Qt::ItemIsEditable);

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childItem->setIcon(0, bookmarkIcon);

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childItem->setText(0, title);

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childItem->setText(1, child.attribute("href"));

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} else if (child.tagName() == "separator") {

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QTreeWidgetItem *childItem = createItem(child, item);

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childItem->setFlags(item->flags() & ~(Qt::ItemIsSelectable | Qt::ItemIsEditable));

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childItem->setText(0, QString(30, 0xB7));

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}

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child = child.nextSiblingElement();

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}

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}

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QTreeWidgetItem *XbelTree::createItem(const QDomElement &element,

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QTreeWidgetItem *parentItem)

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{

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QTreeWidgetItem *item;

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if (parentItem) {

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item = new QTreeWidgetItem(parentItem);

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} else {

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item = new QTreeWidgetItem(this);

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}

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domElementForItem.insert(item, element);

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return item;

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}</pre>

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