Qt Reference Documentation

# timequery.cpp Example File

xmlpatterns/trafficinfo/timequery.cpp

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     #include "timequery.h"

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

     TimeInformation::TimeInformation(const QString &time, const QString &direction)
         : m_time(time), m_direction(direction)
     {
     }

     QString TimeInformation::time() const
     {
         return m_time;
     }

     QString TimeInformation::direction() const
     {
         return m_direction;
     }

     TimeInformation::List TimeQuery::query(const QString &stationId, const QStringList &lineNumbers, const QDateTime &dateTime)
     {
         const TimeInformation::List information = queryInternal(stationId, dateTime);

         TimeInformation::List filteredInformation;

         if (!lineNumbers.isEmpty()) {
             for (int i = 0; i < information.count(); ++i) {
                 const TimeInformation info = information.at(i);
                 for (int j = 0; j < lineNumbers.count(); ++j) {
                     if (info.direction().startsWith(QString("%1 ").arg(lineNumbers.at(j))))
                         filteredInformation.append(info);
                 }
             }
         } else {
             filteredInformation = information;
         }

         return filteredInformation;
     }

     TimeInformation::List TimeQuery::queryInternal(const QString &stationId, const QDateTime &dateTime)
     {
         const QString timesQueryUrl = QString("doc('http://wap.trafikanten.no/F.asp?f=%1&amp;t=%2&amp;m=%3&amp;d=%4&amp;start=1')/wml/card/p/small/a[fn:starts-with(@href, 'Rute')]/string()")
                                              .arg(stationId)
                                              .arg(dateTime.time().hour())
                                              .arg(dateTime.time().minute())
                                              .arg(dateTime.toString("dd.MM.yyyy"));
         const QString directionsQueryUrl = QString("doc('http://wap.trafikanten.no/F.asp?f=%1&amp;t=%2&amp;m=%3&amp;d=%4&amp;start=1')/wml/card/p/small/text()[matches(., '[0-9].*')]/string()")
                                                   .arg(stationId)
                                                   .arg(dateTime.time().hour())
                                                   .arg(dateTime.time().minute())
                                                   .arg(dateTime.toString("dd.MM.yyyy"));

         QStringList times;
         QStringList directions;

         QXmlQuery query;
         query.setQuery(timesQueryUrl);
         query.evaluateTo(&times);

         query.setQuery(directionsQueryUrl);
         query.evaluateTo(&directions);

         if (times.count() != directions.count()) // something went wrong...
             return TimeInformation::List();

         TimeInformation::List information;
         for (int i = 0; i < times.count(); ++i)
             information.append(TimeInformation(times.at(i).simplified(), directions.at(i).simplified()));

         return information;
     }