sqleventmodel.cpp Example File | Qt Quick Controls 5.4

- Qt 5.4
- Qt Quick Controls
- Qt Quick Controls - Calendar Example
- sqleventmodel.cpp Example File
- Qt 5.4.2 Reference Documentation

# sqleventmodel.cpp Example File

calendar/src/sqleventmodel.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the Qt Quick Controls module of the Qt Toolkit.
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    ** $QT_BEGIN_LICENSE:BSD$
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    **
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    #include "sqleventmodel.h"

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

    SqlEventModel::SqlEventModel() :
        QSqlQueryModel()
    {
        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;
    }