Question

I’m wondering if it is possible to capture an event that is generated when all
Qt objects are initialized and ready ?

It seems that some things can’t be done in window’s constructor. And they work fine in slot implementation.

For example, when I want to access root window of my application I do it like that

// in *.h
MainWindow* rootWindow

// in *.cpp
rootWindow = qobject_cast<MainWindow *>(this->window());

If it is done in the contructor I can’t use rootWindow object – it couses runtime error.

There is no relevant slot to implement. And create event in QMainWindow class is not virtual.

Thanks for help 🙂

Answer 1

You can use a single-shot timer for this. In your main window class, define a slot function called say, appReady(). In the constructor, create and connect a single shot timer using QTimer::singleShot(0, this, SLOT(appReady())); This timer should fire as soon as the event loop is up and running and there are no more startup events pending.