How to work with the replaceWidget function from QGridLayout

[anda_skoa]

As you found out yourself already, you need of course create instances of StationCard before you can add them.

stationVector[k] = new StationCard

stationVector[k] = new StationCard

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You experience a crash because your StationCard constructor tries to add an uninitialized pointer (propLabel) to a layout.
Create a QLabel instance first

Cheers,
_

P.S.: you can do the StationCard in designer if you want to, just use the widget template for a designer form and add the "ui" pointer and related code lines manually to your class

[KeineAhnung]

Thanks for the help! Now the program is running and I can tackle the next step to connect the checkbox from the group box. As you can see I am missing a lot of the basic stuff but I am just not good at reading books. I always try to start in the middle...

[anda_skoa]

You can "forward" signals

class StationCard : public QGroupBox
{
signals:
    void somethingToggled(bool on);
};
 
 
StationCard::StationCard()
{
    connect(someCheckBox, SIGNAL(toggled(bool)), this, SIGNAL(somethingToggled(bool)));
}

class StationCard : public QGroupBox
{
signals:
    void somethingToggled(bool on);
};


StationCard::StationCard()
{
    connect(someCheckBox, SIGNAL(toggled(bool)), this, SIGNAL(somethingToggled(bool)));
}

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Cheers,
_