domparser.cpp

Qt4的一些例子

#include <QtGui>
#include <QtXml>

#include "domparser.h"

DomParser::DomParser(QIODevice *device, QTreeWidget *tree)
{
    treeWidget = tree;

    QString errorStr;
    int errorLine;
    int errorColumn;

    QDomDocument doc;
    if (!doc.setContent(device, true, &errorStr, &errorLine,
                        &errorColumn)) {
        QMessageBox::warning(0, QObject::tr("DOM Parser"),
                             QObject::tr("Parse error at line %1, "
                                         "column %2:\n%3")
                             .arg(errorLine)
                             .arg(errorColumn)
                             .arg(errorStr));
        return;
    }

    QDomElement root = doc.documentElement();
    if (root.tagName() != "bookindex")
        return;

    QDomNode node = root.firstChild();
    while (!node.isNull()) {
        if (node.toElement().tagName() == "entry")
            parseEntry(node.toElement(), 0);
        node = node.nextSibling();
    }
}

void DomParser::parseEntry(const QDomElement &element,
                           QTreeWidgetItem *parent)
{
    QTreeWidgetItem *item;
    if (parent) {
        item = new QTreeWidgetItem(parent);
    } else {
        item = new QTreeWidgetItem(treeWidget);
    }
    item->setText(0, element.attribute("term"));

    QDomNode node = element.firstChild();
    while (!node.isNull()) {
        if (node.toElement().tagName() == "entry") {
            parseEntry(node.toElement(), item);
        } else if (node.toElement().tagName() == "page") {
            QDomNode childNode = node.firstChild();
            while (!childNode.isNull()) {
                if (childNode.nodeType() == QDomNode::TextNode) {
                    QString page = childNode.toText().data();
                    QString allPages = item->text(1);
                    if (!allPages.isEmpty())
                        allPages += ", ";
                    allPages += page;
                    item->setText(1, allPages);
                    break;
                }
                childNode = childNode.nextSibling();
            }
        }
        node = node.nextSibling();
    }
}