Qt Reference Documentation

# stationquery.cpp Example File

xmlpatterns/trafficinfo/stationquery.cpp

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     #include "stationquery.h"

     #include <QtCore/QStringList>
     #include <QtXmlPatterns/QXmlQuery>

     StationInformation::StationInformation()
     {
     }

     StationInformation::StationInformation(const QString &id, const QString &name)
         : m_id(id), m_name(name)
     {
     }

     QString StationInformation::id() const
     {
         return m_id;
     }

     QString StationInformation::name() const
     {
         return m_name;
     }

     StationInformation::List StationQuery::query(const QString &name)
     {
         const QString stationIdQueryUrl = QString("doc(concat('http://wap.trafikanten.no/FromLink1.asp?fra=', $station))/wml/card/p/small/a[@title='Velg']/substring(@href,18)");
         const QString stationNameQueryUrl = QString("doc(concat('http://wap.trafikanten.no/FromLink1.asp?fra=', $station))/wml/card/p/small/a[@title='Velg']/string()");

         QStringList stationIds;
         QStringList stationNames;

         QXmlQuery query;

         query.bindVariable("station", QVariant(QString::fromLatin1(QUrl::toPercentEncoding(name))));
         query.setQuery(stationIdQueryUrl);
         query.evaluateTo(&stationIds);

         query.bindVariable("station", QVariant(QString::fromLatin1(QUrl::toPercentEncoding(name))));
         query.setQuery(stationNameQueryUrl);
         query.evaluateTo(&stationNames);

         if (stationIds.count() != stationNames.count()) // something went wrong...
             return StationInformation::List();

         StationInformation::List information;
         for (int i = 0; i < stationIds.count(); ++i)
             information.append(StationInformation(stationIds.at(i), stationNames.at(i)));

         return information;
     }