Delay initializing?

[MorrisLiang]

Here's my code:

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
        MyWidget myWidget;
	return a.exec();
}
 
MyWidget::MyWidget()
{
    ...
    show();
    do_heavy_init();
}

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
        MyWidget myWidget;
	return a.exec();
}

MyWidget::MyWidget()
{
    ...
    show();
    do_heavy_init();
}

To copy to clipboard, switch view to plain text mode 

As above, "a.exec();" is called after "do_heavy_init();".
Because "do_heavy_init()" costs much time, the main window would not show up immediately.
In my case, I actually want "do_heavy_init()" to be called after myWidget is shown up on the screen. Is there an elegant way to do so? Many thanks~