QTime more than 24 hours

Mr_Steve

Hello,
Is there any way around the 24 hour limit in QTime?
There is such a code:

QVector<QTime> time;
        time.fill( QTime(0,0), 3 );

        while ( q.next() )
        {
            ms = MachineState( q.value(2).toInt(), 0, 0, q.value(0).toDateTime() );
            int interval = lastMs.date().secsTo( ms.date() );
            switch ( lastMs.state() )
            {
            case MachineState::work :
                time[MachineState::work] = time[MachineState::work].addSecs(interval);
                break;
            case MachineState::adjustment :
                time[MachineState::adjustment] = time[MachineState::adjustment].addSecs(interval);
                break;
            case MachineState::idle :
                time[MachineState::idle] = time[MachineState::idle].addSecs(interval);
                break;
            }
            lastMs = ms;
        }

If you process information in 2-3 days, the timer will simply reset, how can I get around this?
QT 4.7.0

JKSH

@Mr_Steve said in QTime more than 24 hours:

Is there any way around the 24 hour limit in QTime?

Use QDateTime

Mr_Steve

Сould you give an example?

JKSH

@Mr_Steve said in QTime more than 24 hours:

Сould you give an example?

What kind of example do you want?

In your code, replace QTime with QDateTime. See

Mr_Steve

@JKSH If i replace QTime with QDateTime i got crash in app.

JKSH

@Mr_Steve said in QTime more than 24 hours:

i got crash

Start debugging.

QTime is limited to 24 hours. QDateTime is limited to thousands of years.

You asked how you can overcome the 24-hour limit. The answer is to use QDateTime instead of QTime.

However, don't just automatically replace all instances of QTime with QDateTime; check each QTime object and see if you need to change your code around it.

Mr_Steve

@JKSH
Suppose I need QDateTime to start at 00:00:00 and read further
Should I set the date using QDateTime :: FromString?
Just by changing the QDateTime to get a year -4763

JKSH

@Mr_Steve said in QTime more than 24 hours:

@JKSH
Suppose I need QDateTime to start at 00:00:00 and read further
Should I set the date using QDateTime :: FromString?

Yes, you can use QDateTime::fromString().

You can also use the QDateTime constructor. For example,

QDateTime dt( QDate::currentDate() );
// dt.date() == Today's date
// dt.time() == 00:00:00.000

See https://doc.qt.io/archives/qt-4.7/qdatetime.html#QDateTime-2

Mr_Steve

@JKSH Next i try to show the time in the table, but get empty cells

Here is code:

list << QString()
            << _machines[ i + 1 ]                     
            << Table::toStr( time.at(0) )					
            << Table::toStr( time.at(1) ) 				
            << Table::toStr( time.at(2) )

 QString inline toStr(const QDateTime & dt)
    { return dt.toString( "yyyy-MM-dd hh:mm:ss" ); }

    QString inline toStr(const QTime & dt)
    { return dt.toString( "HH:mm" ); }

    QString inline toStr(const QDate & dt)
    { return dt.toString( "yyyy-MM-dd" ); }

JKSH

@Mr_Steve said in QTime more than 24 hours:

i try to show the time in the table

Learn to use QDebug. It will help you see your data.

#include <QDebug>

...

qDebug() << time.at(0);
qDebug() << Table::toStr( time.at(0) );

Mr_Steve

@JKSH

JKSH

@Mr_Steve Your date looks like it contains corrupted or uninitialized data.

Debug your program at the point where you create the QDateTime objects.