Can qt slot return value

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Jul 24, 2013 ... Qt Quick's QML language makes it easy to do a lot of things, ... signals and slots and other services of the Qt meta-object system. .... Getter functions like type() simply return the appropriate private ... Setters set the appropriate variables, taking care to check that the new value is different from the old one and ...

Support for Signals and Slots — PyQt 5.11.1 Reference Guide One of the key features of Qt is its use of signals and slots to communicate .... Returns: a Connection object which can be passed to disconnect() . This is the .... def valueChanged(self, value): """ Two slots will be defined in the QMetaObject. "" " ... Signals and Slots in C++ - sigslot - SourceForge Signals and slots can optionally take one or more arguments, with arbitrary types. .... 3Other signal/slot approaches do allow values to be returned, but I found this to .... I wrote the sigslot library because, after some time programming in the Qt ... c++ - Qt: meaning of slot return value? - Stack Overflow 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::DirectConnection 1 The slot is invoked immediately, when the signal is emitted. So I thought I could do something like i wrote above. If I well understood so the problem is that I cannot make any assumptions on if the return statement of the slot will be executed before the use...

python - PySide: Returning a value from a slot - Stack ... PySide: Returning a value from a slot. The Pyside documentation states that slots can have return values, but I have yet to figure out how make it do so. I couldn't find any usable code samples on this, so I've added a decorator as the docs suggest: And I'm trying to capture the return value like this: But it's not working. Qt: Return value of signal works, why is the official doc ...

Feb 6, 2013 ... How signals and slots are useful, and what they can do when developing in ... the signals that are provided by Qt widgets, however; you can create your own. .... "Hide" the values and expose them via properties ... return self.

Signals & Slots | Qt 4.8 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. They are completely type safe. ...

20 ways to debug Qt signals and slots | Sam Dutton’s blog

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. python - PySide: Returning a value from a slot - Stack

But Qt C++ can be more performant, offers many features and is less error-prone. ..... example, our new class also uses a return value for the increment slot.

Signals & Slots | Qt Core 5.12.3 - Qt Documentation Signals and slots can take any number of arguments of any type. .... int value() const { return m_value; } public slots: void setValue(int value); signals: void ...