doing a thing after the form is displayed

[franco.amato]

Good morning this is what I would implement:
just after that the main form is created and displayed I would connect to a database.
I tried to add the code to connect to the database in the ctor of the main application but it connect before the main form is displayed. How can I avoid this behavior?
Regards

[Lykurg]

Put the connection statements in an extra function and call it, after the main form was created/shown.

[wysota]

QMetaObject::invokeMethod(..., Qt::QueuedConnection) is also a good solution. It will run a slot only after starting the event loop.

[ChrisW67]

Or you can use a zero duration single-shot timer at the end of the constructor to have a similar effect:


MyClass::MyClass()
{
// stuff
QTimer::singleShot(0, this, SLOT(doConnect()));
}

// slot:
void doConnect()
{
// whatever
}