QDateTimeEdit DateTimeChanged

Phamy1289

I have a calendar popup for my start date. I want to be able to select the date and save the changed date to a variable to filter out a list based on the date in my QTableWidget. I don't know what I'm doing wrong as the variable that suppose to save the date keeps showing 1/1/00 12:00am instead of the date and time I'm selecting.

QGroupBox *ScheduleAdvice::mpDateGroup()
{
   QGroupBox *pGroupBox = new QGroupBox;
   pGroupBox->setStyleSheet("border:0");
   QHBoxLayout *pDateLayout = new QHBoxLayout;

   mpStartDateTime = new QDateTimeEdit;
   mpStartDateTime->setCalendarPopup(true);
   mpStartDateTime->setDisplayFormat("yyyy/MM/dd hh:mm:ss");
   mpStartDateTime->setDateTime(QDateTime::currentDateTime());
   mpStartDateTime->setStyleSheet("color: black");

   pDateLayout->addWidget(mpStartDateTime);

   pGroupBox->setLayout(pDateLayout);
}

void ScheduleAdvice::handle(QNetworkReply reply)
{
   //Reading in QJSON 

   for(auto it =root.begin(); it != root.end(); ++it)
   {
      QDateTimeEdit *pMyDateTime = new QDateTimeEdit;
      pMyDateTime.dateTimeChanged(mpStartDateTime->dateTime());
      
      if(it.key().toString() >= pMyDateTime->text())
      {
         qDebug() << pMyDateTime->text();
         //start filtering list in QTableWidget.
      }
   }
}

jsulm

@Phamy1289 said in QDateTimeEdit DateTimeChanged:

as the variable that suppose to save the date

Which variable is that and where do you set it?
Is it myDateTime? If so: where do you set it?
You set pMyDateTime, but then you check myDateTime, why?

Phamy1289

@jsulm Sorry that's a typo. let me fix it. I was hoping to store the mpStartDateTime into the variable pMyDateTime whenever mpStartDate gets a change in the date and time. For example, the date changes from the current date to date 2 years ago. From 11/5/2021 to 02/15/2019. I want pMyDateTime to store 02/15/2019. If mpStartDateTime were to change dates and/or time again, then pMyDateTime would store the new date and/or time.

jsulm

@Phamy1289 said in QDateTimeEdit DateTimeChanged:

pMyDateTime.dateTimeChanged(mpStartDateTime->dateTime());

Why do you call a signal here?!
Why not simply

QDateTimeEdit *pMyDateTime = new QDateTimeEdit(mpStartDateTime->dateTime());

?

Phamy1289

So, now that i'm getting the right dateTime from mpStartDateTime, how do I keep track of the new dateTime in mpStartDateTime if the user selects a different date from the calendar?

SGaist

Hi,

That's what the signal is for.

Phamy1289

The date isn't changing when I change the date. Am I using the signal/slot incorrectly? mpStartDateTime is and QDateTimeEdit and is set to the current date and time when the application launches, I don't know if that matters or not.

connect(mpStartDateTime, SIGNAL(dateTimeChanged(QDateTime)), this, SLOT(updateDateTime(const QDateTime)));

            for(auto it = root.begin(); it != root.end(); ++it)
            {
                if(it.key() == "startDate")
                {
                    if(it.value().toString() >= mpStartDateTime->text())
                    {
                        std::cout << mpStartDateTime->text().toStdString() << " ";
                    }
                    else
                    {
                        std::cout << mpStartDateTime->text().toStdString() << " ";
                    }
                }

void ScheduleAdvice::updateDateTime(const QDateTime dateTime)
{
    mpStartDateTime->setDateTime(dateTime);
}

JonB

@Phamy1289
Start by putting qDebug() << dateTime; into updateDateTime. Is it called at all, is the value correct?

jsulm

@Phamy1289 said in QDateTimeEdit DateTimeChanged:

connect(mpStartDateTime, SIGNAL(dateTimeChanged(QDateTime)), this, SLOT(updateDateTime(const QDateTime)));

I don't understand what you're trying to do.
You connect a signal from mpStartDateTime and in the slot connected to that signal you change mpStartDateTime - what's the point?

Phamy1289

@JonB It does comeback with the correct value.

@jsulm I have a calendar popup and table full of data from a QJSON where start date is one of them attributes. I want to be able to filter that data with the date selected from the popup which the user can choose the date. I would like this to update live as the user changes the start date.

JonB

@Phamy1289 said in QDateTimeEdit DateTimeChanged:

@JonB It does comeback with the correct value.

In that case you can be sure that mpStartDateTime->setDateTime(dateTime); sets that value into *mpStartDateTime.

Phamy1289

@JonB You're right. I did a test and it does update mpStartDateTime. Thank you!