Qt slot function return value

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The QDialog class is ... function to change the ownership of a QDialog ... The Extension Example shows how to achieve extensible dialogs using Qt. Return Value ...

ReadFunc is used in registerFormat() as a pointer to a function that reads a set of key/value pairs. ReadFunc should read all the options in one pass, and return all the settings in the SettingsMap container, which is initially empty. QGraphicsItem Class | Qt Widgets 5.12.3 The return value is unused; you cannot adjust anything in this notification. Note that the new child might not be fully constructed when this notification is sent; calling pure virtual functions on the child can lead to a crash. QWebEnginePage Class | Qt WebEngine 5.12.3 If the prompt was cancelled by the user, the implementation should return false; otherwise the result should be written to result and true should be returned.

According to the documentation the return value from a slot doesn't mean anything.Глядя через источник Qt, кажется, что, когда слот вызывается из QMetaObject :: InvokeMethod типа возвращаемого значения может быть определен и получено возвращаемое значение.

Sending Python values with signals and slots. On the #pyqt channel on Freenode, Khertan asked about sending Python values via Qt's signals and slots mechanism. The following example uses the PyQt_PyObject value declaration with an old-style signal-slot connection, and again when the signal is emitted, to communicate a Python dictionary. Qt: meaning of slot return value? - Stack Overflow

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

qt_widgets::table_view::connection::Slots - Rust

qt_widgets::tree_view::connection::Slots - Rust

The returned value is normally passed to the QtCore.QObject.connect() method. PyQt allows any Python callable to be used as a slot, not just Qt slots.However, if a slot is a lambda function or a partial function then its reference count is automatically incremented to prevent it from being... Как работают сигналы и слоты в Qt Qt хорошо известен своим механизмом сигналов и слотов.Qt хорошо известен своим механизмом сигналов и слотов. Но как это работает? В этом посте мы исследуем внутренности QObject и QMetaObject и раскроем их работу за кадром.

Qt ::ItemFlags StringListModel ::flags( const QModelIndex &index) const { if ( !index .isValid()) return Qt ::ItemIsEnabled; return QAbstractItemModel ::flags(index) | Qt ::ItemIsEditable; }

invoke methods in another thread and get return values - Qt Centre Feb 9, 2011 ... It is unable to QMetaObject::invokeMethod with return values in ... Are you looking for signals/slots with return values other than void, is that it? Qt Signals And Slots - Programming Examples Mechanism to access any function in the class (used by signals and slots); Class ... store it; (When QSlider value is changed), show a new value in QLCDNumber .... a(argc, argv); MyWindow myWindow; myWindow.show(); return a.exec(); }. qt. Messaging and Signaling in C++ - Meeting C++ Aug 20, 2015 ... While Qt signal/slot is the moc driven signaling system of Qt (which you can ... So, slots and signals are normal member functions, declared after the .... In some context it is interesting to handle the return value of a signal, ... 20 ways to debug Qt signals and slots | Sam Dutton's blog