QAsync: Asynchronous Functions for Qt - Fruct Sep 5, 2011 ... Usually asynchronous functions return data to the caller ... Built on top of existing signals and slots mechanism ... value = function(argument); ... Old-style Signal and Slot Support — PyQt 4.9.4 Reference Guide SIGNAL() function. This method ... The returned value is normally passed to the QtCore. ... PyQt allows any Python callable to be used as a slot, not just Qt slots. Passing extra arguments to PyQt slots - Eli Bendersky's website
c++ signal - Qt:meaning of slot return value? - CODE…
You can call this function in a subclass of QAbstractSocket to change the return value of the localPort() function after a connection has been established. GitHub - bwalter/qt-promise: Chainable promises for Qt Chainable promises for Qt. Contribute to bwalter/qt-promise development by creating an account on GitHub. QNetworkAccessManager Class | Qt Network 5.12.3
Function with Signals & Slots | Qt Forum
Magic Macros. That is right, signals and slots are simple functions: the compiler will handle them them like any other functions. The macros still serve a purpose though: the MOC will see them. Signals were protected in Qt4 and before. They are becoming public in Qt5 in order to enable the new syntax . New Signal Slot Syntax - Qt Wiki Disconnecting in Qt 5. As you might expect, there are some changes in how connections can be terminated in Qt 5, too. You can disconnect in the old way (using SIGNAL, SLOT) but only if. You connected using the old way, or. If you want to disconnect all the slots from a given signal using wild card character. PyQt/Sending Python values with signals and slots - Python ... 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 I think that the return value for a slot is only available when the function is called directly (when it is a normal C++ function) or when using ...
18 Jun 2018 ... I figured out that you could actually pass a slot function without providing it any .... A null string value is/can be returned in special cases where ...
The model's implementation of flags() should do that by not returning Qt::ItemIsDropEnabled. QWindow Class | Qt GUI 5.12.3 On windowing systems that do not make this information visible to the application, isExposed() will simply return the same value as isVisible().
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The return value of this method call is placed in returnValue. If the invocation is asynchronous, the return value cannot be evaluated. You can pass up to ten arguments (val0, val1, val2, val3, val4, val5, val6, val7, val8, and val9) to this method call. QGenericArgument and QGenericReturnArgument are internal helper classes. QMetaMethod Class | Qt Core 5.12.3 The return value of this method call is placed in returnValue. If the invocation is asynchronous, the return value cannot be evaluated. You can pass up to ten arguments (val0, val1, val2, val3, val4, val5, val6, val7, val8, and val9) to this method call. QGenericArgument and QGenericReturnArgument are internal helper classes. How to return a value from one slot to another | Qt Forum Okey, briefly, please understand that the doWork(QPixmap pic, QString str, int indx) function takes 3 arguments and emit valueChanged(pic, str,indx) signal also returns 3 arguments. But the problem is, the doWork() slot also contains a Qt Network request, which is connected to syncRequestFinished() slot.
qtlua/qt.md at master · torch/qtlua · GitHub All properties, slots and signals declared by the C++ Qt objects are ... Function qtdata:tostring() returns a Lua string representing the value contained in the Qt ... qobject.cpp source code [qtbase/src/corelib/kernel/qobject.cpp ... 654, \brief The QObject class is the base class of all Qt objects. 655. 656, \ingroup ...... 2441, \warning The return value of this function is not valid when the slot.