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Asked: 2026-05-24T00:37:13+00:00

I have a feeling this isn’t possible with the current API, but I have

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I have a feeling this isn’t possible with the current API, but I have to ask. Is it possible to query a particular QObject’s signal or slot name (from the metaObject) and retrieve all the QObjects and their slot or signals names that are connected to it?

I’m doing this because, in effect, I have a large number of layouts that contain an identical arrangement of widgets, for each layout there an object and each of the layout’s widgets control the various properties of it. I want to keep one layout, and connect it’s widgets’ signal/slots to all the other objects in the same pattern, but in order to do this I need to ‘record’ all the signal-slot data.

Is it possible?

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1 Answer

  1. Editorial Team

    There is an interesting file in Qt – %Qtdir%/src/corelib/kernel/qobject_p.h, it contains class QObjectPrivate, used by Qt internally.
    Use
    static QObjectPrivate *get(QObject *o) function to get QObjectPrivate member for your widgets, and try to call its interesting members like
    QObjectList receiverList(const char *signal) const; or QObjectList senderList() const;. File is totally undocumented, but it seems to contain exactly what you need…

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