QDateTimeEdit选择每月的最后一天

Question

I have a QDateTimeEdit and user should select a date with it. However, I need to select the last day of each month. So, for example if user select 3rd of March, I should set date to 31th of March.

I try to do this in the slot of dateChanged(const QDate&) signal. But when I call setDate() function, it causes the slot to be called once more.

Here is the sample code

connect(m_pDateEdit, SIGNAL(dateChanged(const QDate&)), this, SLOT(OnDateChanged(const QDate&)));

void MyClass::OnDateChanged(const QDate& date)
{
    const bool b = m_pDateEdit->blockSignals(true);

    // THIS LINE CAUSES TO THIS SLOT TO BE CALLED TWICE
    m_pDateEdit->setDate(QDate(date.year(), date.month(), date.daysInMonth()));
    CallSomeFunction();

    m_pDateEdit->blockSignals(b)
}

Anything I'm missing? Any Ideas?

Thank you for your time!

Answer 1

EDIT: since you can't just do a disconnect I would advise you make a checker instead and remove the connect. You can do that :

In the constructor:

QTimer::singleShot(30, this, SLOT(checkDateChanged()));

Then in the class:

void MyClass::checkDateChanged()
{
    if (pDateEdit->day() != pDateEdit->daysInMonth())
    {
        m_pDateEdit->setDate(QDate(date.year(), date.month(), date.daysInMonth()));
    }
    CallSomeFunction();
    QTimer::singleShot(30, this, SLOT(checkDateChanged())); // this will create a loop called every 30 ms.

}