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<title>Qt 4.2: xbeltree.cpp Example File (xml/dombookmarks/xbeltree.cpp)</title>
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<pre> /****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
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#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)),
this, SLOT(updateDomElement(QTreeWidgetItem *, int)));
QDomElement child = root.firstChildElement("folder");
while (!child.isNull()) {
parseFolderElement(child);
child = child.nextSiblingElement("folder");
}
connect(this, SIGNAL(itemChanged(QTreeWidgetItem *, int)),
this, SLOT(updateDomElement(QTreeWidgetItem *, int)));
return true;
}
bool XbelTree::write(QIODevice *device)
{
const int IndentSize = 4;
QTextStream out(device);
domDocument.save(out, IndentSize);
return true;
}
void XbelTree::updateDomElement(QTreeWidgetItem *item, int column)
{
QDomElement element = domElementForItem.value(item);
if (!element.isNull()) {
if (column == 0) {
QDomElement oldTitleElement = element.firstChildElement("title");
QDomElement newTitleElement = domDocument.createElement("title");
QDomText newTitleText = domDocument.createTextNode(item->text(0));
newTitleElement.appendChild(newTitleText);
element.replaceChild(newTitleElement, oldTitleElement);
} else {
if (element.tagName() == "bookmark")
element.setAttribute("href", item->text(1));
}
}
}
void XbelTree::parseFolderElement(const QDomElement &element,
QTreeWidgetItem *parentItem)
{
QTreeWidgetItem *item = createItem(element, parentItem);
QString title = element.firstChildElement("title").text();
if (title.isEmpty())
title = QObject::tr("Folder");
item->setFlags(item->flags() | Qt::ItemIsEditable);
item->setIcon(0, folderIcon);
item->setText(0, title);
bool folded = (element.attribute("folded") != "no");
setItemExpanded(item, !folded);
QDomElement child = element.firstChildElement();
while (!child.isNull()) {
if (child.tagName() == "folder") {
parseFolderElement(child, item);
} else if (child.tagName() == "bookmark") {
QTreeWidgetItem *childItem = createItem(child, item);
QString title = child.firstChildElement("title").text();
if (title.isEmpty())
title = QObject::tr("Folder");
childItem->setFlags(item->flags() | Qt::ItemIsEditable);
childItem->setIcon(0, bookmarkIcon);
childItem->setText(0, title);
childItem->setText(1, child.attribute("href"));
} else if (child.tagName() == "separator") {
QTreeWidgetItem *childItem = createItem(child, item);
childItem->setFlags(item->flags() & ~(Qt::ItemIsSelectable | Qt::ItemIsEditable));
childItem->setText(0, QString(30, 0xB7));
}
child = child.nextSiblingElement();
}
}
QTreeWidgetItem *XbelTree::createItem(const QDomElement &element,
QTreeWidgetItem *parentItem)
{
QTreeWidgetItem *item;
if (parentItem) {
item = new QTreeWidgetItem(parentItem);
} else {
item = new QTreeWidgetItem(this);
}
domElementForItem.insert(item, element);
return item;
}</pre>
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