My QTimer isnt working...

[RuWex]

MainWindow.cpp:

 button->show();
             connect(button, &QPushButton::clicked, this, [=]() {
statusBar()->showMessage(tr("Ready Start Testing"), 2000);
                 Timer timer(num, fileName);
                              });

timer.cpp:

#include <QDebug>
#include <QTimer>
#include "timer.h"


Timer::Timer(int num, QString fileName)
{
       m_timer= new QTimer(this);
       m_send= new SendCommands();
       m_timeTimer= num;
       m_fileName= fileName;

       connect(m_timer, SIGNAL(timeout()), this, SLOT(MySlots()));
       m_timer->start(m_timeTimer);
       if (firstTime)
       {
           MySlots();
       }
       firstTime=false;
}


void Timer:: MySlots()
{
    qDebug()<<"print..."<<endl;
    m_send->StartToSendCommand(m_fileName);
}

sendCommands.cpp:

void SendCommands::StartToSendCommand( QString fileName)//Ruth
{
 
    Timer time(2000, fileName);
    MainSendCommand mainSendCom;
    mainSendCom.mainwind->ChangeStatus("send commands");
    bool ans=additionalTest->CountsTheTimeRemaining(fileName);
    if (ans)
    {
        QFile file(fileName);
        if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
            return;

        QTextStream in(&file);
        QString line;
        while (!in.atEnd()) {

            line = in.readLine();

            QApplication::processEvents();

        }

    }
    else {
        return;
    }

}

but, the timer doesnt working:(
what I actually want is that when the betton would press the function every X minute will worked.
whats wrong?

[J.Hilk]

@RuWex said in My QTimer isnt working...:

whats wrong

object lifetime, stack vs heap

[RuWex]

@J-Hilk
??
what do you mean?

[jsulm]

@RuWex What do you think how long does "time" object exist here:

void SendCommands::StartToSendCommand( QString fileName)//Ruth
{
 
    Timer time(2000, fileName);

?

Or "timer" here:

button->show();
             connect(button, &QPushButton::clicked, this, [=]() {
                 statusBar()->showMessage(tr("Ready Start Testing"), 2000);
                 Timer timer(num, fileName);
             });