Signals are not designed to give you the slots' return values, and there is no guarantee that your example will behave the same way in future versions of Qt. Make sure your code never tries to get the return value of a slot through a signal. Anyway, signal+slot connections do behave differently depending on the threads involved. Can Qt signals return a value - forums.wikitechy.com Dec 21, 2018 · It captures the return value from the slots. Expand the code”testSlot2″, and return the last value from the connected slots of the signal. Qt Signals are a syntax sugared interface to the signaling pattern. Slots are the recipients of signal and direct connected signal-slot relationship. How to return a value from one slot to another | Qt Forum @SGaist @koahnig Slightly updated my original post to make it clear. 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. Can Qt signals return a value? - ExceptionsHub
Signals and slots - BlackBerry Native
QML2 to C++ and back again, with signals and slots - andrew-jones.com Nov 23, 2014 ... Signals and Slots are a feature of Qt used for communication ... I will emit the signal when the button is pressed, passing the value of the text ... Type-safe Signals and Slots in C++: Part 2 - CodeProject Implements a type-safe signal / slot or event / delegate system in C++. ... type to a signal and you can combine the multiple return values from the slots into ..... Boost and QT also offer signal / slot functionality (see Part 1 of the article series).
Grafické programy v Qt 4 – 8 (TCP klient)
A lightweight header-only, single file signal slot notification library built on c++98 with no dependencies - tonypilz/Signal-Slot-Notify Konzolové programy v Qt 4 – 2 (práce s HTTP a FTP)
Support for Signals and Slots — PyQt 5.11 Reference Guide
Signals and slots - BlackBerry Native May 7, 2015 ... For more detailed information, see Signals & Slots on the Qt website. .... The connect() function returns a Boolean value that indicates whether ... Crash course in Qt for C++ developers, Part 3 / Clean Qt
One of the key features of Qt is its use of signals and slots to ... Return type: an unbound signal. ... when the user changes the value, your slot will be ...
Creating advanced dialogs and windows — itom Documentation The dialog is closed and the return value in modal style is 1. .... Qt provides the possibility to connect a signal with a slot, under the only condition, that both have ... Lambda Expressions and Qt 4.x - Silmor.de While the capability to connect signals to lambdas is planned for Qt 5, it is not ... are copied (the lambda knows its context by value instead of by reference), but ... If you need the paramters or need a return type for the slot/lambda you have to ... Making Boost.Signals2 More OOP‐Friendly - The Hermetic Vault Apr 17, 2015 ... Or think of Qt signals and slots or Visual C++ event handling, but .... The function returns boost::signals2::connection object which can be used ... Tutorial - 1.68.0 - Boost C++ Libraries
Can Qt signals return a value? - Stack Overflow OK. So, I did a little more investigating. Seems this is possible. I was able to emit a signal, and receive value from the slot the signal was ... How C++ lambda expressions can improve your Qt code - Medium 25 Jan 2017 ... for(int value : vect) { std::cout << value << std::endl; } return 0; } .... Just like a classic signal-slot connection, if the context object thread is not the ...