Qt 5.9 | Qt Quick Controls | Qt Quick Controls - Calendar Example | sqleventmodel.cpp Example File

Qt 5.9.9 Reference Documentation

# sqleventmodel.cpp Example File

calendar/src/sqleventmodel.cpp

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      #include "sqleventmodel.h"

      #include <QDebug>
      #include <QFileInfo>
      #include <QSqlError>
      #include <QSqlQuery>

      SqlEventModel::SqlEventModel()
      {
          createConnection();
      }

      QList<QObject*> SqlEventModel::eventsForDate(const QDate &date)
      {
          const QString queryStr = QString::fromLatin1("SELECT * FROM Event WHERE '%1' >= startDate AND '%1' <= endDate").arg(date.toString("yyyy-MM-dd"));
          QSqlQuery query(queryStr);
          if (!query.exec())
              qFatal("Query failed");

          QList<QObject*> events;
          while (query.next()) {
              Event *event = new Event(this);
              event->setName(query.value("name").toString());

              QDateTime startDate;
              startDate.setDate(query.value("startDate").toDate());
              startDate.setTime(QTime(0, 0).addSecs(query.value("startTime").toInt()));
              event->setStartDate(startDate);

              QDateTime endDate;
              endDate.setDate(query.value("endDate").toDate());
              endDate.setTime(QTime(0, 0).addSecs(query.value("endTime").toInt()));
              event->setEndDate(endDate);

              events.append(event);
          }

          return events;
      }

      /*
          Defines a helper function to open a connection to an
          in-memory SQLITE database and to create a test table.
      */
      void SqlEventModel::createConnection()
      {
          QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
          db.setDatabaseName(":memory:");
          if (!db.open()) {
              qFatal("Cannot open database");
              return;
          }

          QSqlQuery query;
          // We store the time as seconds because it's easier to query.
          query.exec("create table Event (name TEXT, startDate DATE, startTime INT, endDate DATE, endTime INT)");
          query.exec("insert into Event values('Grocery shopping', '2014-01-01', 36000, '2014-01-01', 39600)");
          query.exec("insert into Event values('Ice skating', '2014-01-01', 57600, '2014-01-01', 61200)");
          query.exec("insert into Event values('Doctor''s appointment', '2014-01-15', 57600, '2014-01-15', 63000)");
          query.exec("insert into Event values('Conference', '2014-01-24', 32400, '2014-01-28', 61200)");

          return;
      }