Qt slots with return values

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Socket options return strange values - Qt Bug Tracker

Signals and Slots. Signals and slots are used for communication between objects. The signal/slot mechanism is a central feature of Qt and probably the part that differs most from other toolkits. In GUI programming we often want a change in one widget to be notified to another widget. PyQt slot return value - forum.qt.io Reply to PyQt slot return value on Mon, 26 Jan 2015 01:55:18 GMT @pyqtSlot( result = str ) is only for the C++ declaration. you can not use the return value with an emit Event. Signals & Slots — Qt for Python An overview of Qt’s signals and slots inter-object communication mechanism. Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt and probably the part that differs most from the features provided by other frameworks. How to Expose a Qt C++ Class with Signals and Slots to QML In contrast to the previous example, our new class also uses a return value for the increment slot. No further adjustments are required to receive the return value in QML. Qt automatically maps basic C++ types to QML types for all method parameters and return values.

c++ - Qt: meaning of slot return value? - Stack Overflow

Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt and probably the part that differs most from the features provided by other frameworks. Can Qt signals return a value? - ExceptionsHub foreach slot in connectedSlotsForSignal(signal): value = invoke slot with parameters from signal return value.Qt’s qt_metacall function returns an integer status code. Because of this, I believe this makes an actual return value impossible (unless you fudge around with the meta object system and... Qt: Сигналы и слоты (выдержка из документации Qt 4.x)

Qt 5.0: Signals & Slots

This is currently being used in some places inside Qt, f.i. the QNetworkAccessManager::authenticationRequired signal expects the connected slots to fill in the QAuthenticator object (and notice that it doesn't work with queued connections). Thus, I see no point in supporting return values across connections. Qt.ConnectionType This function should return an integer value for the enum values of the enumeration that implements this interface. static Qt.ConnectionType valueOf (java.lang.String name)

They are just calling QMetaObject::activate, with an array of pointers to arguments on the stack. Here is the code of a signal, as generated by moc: (from part 1)

Qt doesn't accept Signals and Slots with different parameters, so how do I go about doing this? Do I: 1) Overload returnPressed() of QLineEdit ? Is this even possible? 2) Create my own Signal in the Grid class? If so, how do I connect this signal to returnPressed() ? (if I do, then both will need to have void... Qt: meaning of slot return value? 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. Qt - Connecting overloaded signals/slots | qt Tutorial Connecting overloaded signals/slots. Multi window signal slot connection. The new Qt5 connection syntax. SQL on Qt.While being better in many regards, the new connection syntax in Qt5 has one big weakness: Connecting overloaded signals and slots. Slot with a return value?