Can qt slot return value

Passing extra arguments to Qt slots - Eli Bendersky's website

PythonQt: Developer PyObject is passed as direct pointer, which allows to pass/return any Python object directly to/from a Qt slot that uses PyObject* as its argument/return value. QVariants are mapped recursively as given above, e.g. a dictionary can contain lists of dictionaries of doubles. 16. Qt and C++ — Qt5 Cadaques Book vmaster It is the base class of almost all classes in Qt. Exceptions are value types such as QColor, QString and QList. A Qt object is a standard C++ object, but with more abilities. These can be divided into two groups: introspection and memory management. 18. Qt for Python — Qt5 Cadaques Book vmaster

A Note About Indexes. But all the slots waste space in the vector and there are usually more slots than signals in an object. So from Qt 4.6, a new internal signal index which only includes the signal index is used. While developing with Qt, you only need to know about the absolute method index.

According to the documentation the return value from a slot doesn't mean anything. Yet in the generated moc code I see that if a slot returns a value this value is ... Getting a return value from an emitted signal | Qt Forum Getting a return value from an emitted signal Getting a ... If you need a return value, ... Qt::DirectConnection 1 The slot is invoked immediately, ...

A developer can choose to connect to a signal by creating a function (a slot) and calling the connect() function to relate the signal to the slot. Qt's signals and slots mechanism does not require classes to have knowledge of each other, which makes it much easier to develop highly reusable classes.

Qt Development Language Bindings PyQt slot return value PyQt slot return value. This topic has been deleted. Only users with topic management privileges can see it. thumperj. last edited by . Any help with this would be appreciated, including hints on how to debug further. The pyqtSlot decorator takes a result as one of the parameters. qt - Passing an argument to a slot - Stack Overflow The slot is a member of a subclass of QObject, thus it has also a QObject::sender() member. Just call sender(), and you will be given a QObject* pointing to your action. After that you can use objectName() or property() of an acquired action to collect more information. Function with Signals & Slots | Qt Forum

There is no equivalent of the Q_INVOKABLE macro of Qt since PySide2 slots can actually have return values. If you need to create a invokable method that returns some value, declare it as a slot, e.g.:

c++ - Qt - Return value when signal is emitted? - Stack ... Even though signals in Qt can indeed return values, this is rarely used, if ever. Namely because it doesn't make a lot of sense. What you probably want to do is not return but emit the image with a signal, this way you can connect it to a function that will receive the image and do something with it. c++ - QT return value from a signal? - Stack Overflow I'm running all my SQLite database operations in a separate thread to ensure that the GUI wont freeze up. I'm doing this by connecting up signals and slots for the methods. However now I need to ...