This is especially useful for functions with return types, as slots normally do not return anything (it would be meaningless to return a value from a slot, as the connected signals cannot handle return values). Moving from QSA to Qt Script | Qt 4.8 Qt Script however does provides almost full compliance with the ECMAScript standard and performs significantly better than the script engine provided by QSA. Interacting with QML Objects from C++ | Qt QML 5.12.3
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
Interacting with QML Objects from C++ | Qt QML 5.12.3 Interacting with QML Objects from C++ All QML object types are QObject -derived types, whether they are internally implemented by the engine or defined by third-party sources . This means the QML engine can use the Qt Meta Object System to dynamically instantiate any QML … Slot — Qt for Python 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.: Signals & Slots | Qt Core 5.12.3 Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal. Qt's signals and slots mechanism ensures that if you connect a signal to a slot, the slot will be called with the signal's parameters at the right time. Signals and slots can take any number of arguments of any type. c++ - Qt: meaning of slot return value? - Stack Overflow
How to have multiple Qt buttons return each different values
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Signals & Slots | Qt 4.8
Can Qt signals return a value? - ExceptionsHub
... int value() const { return m_value; } public slots: void setValue(int value); signals: void valueChanged(int newValue); ...
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Кто послал сигнал в слот? | C++ (Qt) Кто послал сигнал в слот? - русский QT форум.Как узнать в слоте, от какого виджета пришел сигнал? QT 4.6.2, QT Creator. как написано выше - можно смотреть QObject::sender() но! [SOLVED] Qt: Signal and slot with different parameters |… 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.