xbeltree.cpp Example File

dombookmarks/xbeltree.cpp
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#include <QtWidgets> #include "xbeltree.h" enum { DomElementRole = Qt::UserRole + 1 }; Q_DECLARE_METATYPE(QDomElement) static inline QString titleElement() { return QStringLiteral("title"); } static inline QString folderElement() { return QStringLiteral("folder"); } static inline QString bookmarkElement() { return QStringLiteral("bookmark"); } static inline QString versionAttribute() { return QStringLiteral("version"); } static inline QString hrefAttribute() { return QStringLiteral("href"); } static inline QString foldedAttribute() { return QStringLiteral("folded"); } XbelTree::XbelTree(QWidget *parent) : QTreeWidget(parent) { QStringList labels; labels << tr("Title") << tr("Location"); header()->setSectionResizeMode(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)); } #if !defined(QT_NO_CONTEXTMENU) && !defined(QT_NO_CLIPBOARD) void XbelTree::contextMenuEvent(QContextMenuEvent *event) { const QTreeWidgetItem *item = itemAt(event->pos()); if (!item) return; const QString url = item->text(1); QMenu contextMenu; QAction *copyAction = contextMenu.addAction(tr("Copy Link to Clipboard")); QAction *openAction = contextMenu.addAction(tr("Open")); QAction *action = contextMenu.exec(event->globalPos()); if (action == copyAction) QGuiApplication::clipboard()->setText(url); else if (action == openAction) QDesktopServices::openUrl(QUrl(url)); } #endif // !QT_NO_CONTEXTMENU && !QT_NO_CLIPBOARD 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(versionAttribute()) && root.attribute(versionAttribute()) != QLatin1String("1.0")) { QMessageBox::information(window(), tr("DOM Bookmarks"), tr("The file is not an XBEL version 1.0 " "file.")); return false; } clear(); disconnect(this, &QTreeWidget::itemChanged, this, &XbelTree::updateDomElement); QDomElement child = root.firstChildElement(folderElement()); while (!child.isNull()) { parseFolderElement(child); child = child.nextSiblingElement(folderElement()); } connect(this, &QTreeWidget::itemChanged, this, &XbelTree::updateDomElement); return true; } bool XbelTree::write(QIODevice *device) const { const int IndentSize = 4; QTextStream out(device); domDocument.save(out, IndentSize); return true; } void XbelTree::updateDomElement(const QTreeWidgetItem *item, int column) { QDomElement element = item->data(0, DomElementRole).value<QDomElement>(); if (!element.isNull()) { if (column == 0) { QDomElement oldTitleElement = element.firstChildElement(titleElement()); QDomElement newTitleElement = domDocument.createElement(titleElement()); QDomText newTitleText = domDocument.createTextNode(item->text(0)); newTitleElement.appendChild(newTitleText); element.replaceChild(newTitleElement, oldTitleElement); } else { if (element.tagName() == bookmarkElement()) element.setAttribute(hrefAttribute(), item->text(1)); } } } void XbelTree::parseFolderElement(const QDomElement &element, QTreeWidgetItem *parentItem) { QTreeWidgetItem *item = createItem(element, parentItem); QString title = element.firstChildElement(titleElement()).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(foldedAttribute()) != QLatin1String("no")); setItemExpanded(item, !folded); QDomElement child = element.firstChildElement(); while (!child.isNull()) { if (child.tagName() == folderElement()) { parseFolderElement(child, item); } else if (child.tagName() == bookmarkElement()) { QTreeWidgetItem *childItem = createItem(child, item); QString title = child.firstChildElement(titleElement()).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(hrefAttribute())); } else if (child.tagName() == QLatin1String("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); } item->setData(0, DomElementRole, QVariant::fromValue(element)); return item; }

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